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MOSEL VITELIC
V53C818H HIGH PERFORMANCE 512K X 16 EDO PAGE MODE CMOS DYNAMIC RAM
PRELIMINARY
HIGH PERFORMANCE
Max. RAS Access Time, (tRAC) Max. Column Address Access Time, (tCAA) Min. Extended Data Out Mode Cycle Time, (tPC) Min. Read/Write Cycle Time, (tRC)
30
30 ns 16 ns 12 ns 65 ns
35
35 ns 18 ns 14 ns 70 ns
40
40 ns 20 ns 15 ns 75 ns
45
45 ns 22 ns 17 ns 80 ns
50
50 ns 24 ns 19 ns 90 ns
Features
s 512K x 16-bit organization s EDO Page Mode for a sustained data rate of 83 MHz s RAS access time: 30, 35, 40, 45, 50 ns s Dual CAS Inputs s Pin-to-Pin compatible with 256K x 16 s Low power dissipation s Read-Modify-Write, RAS-Only Refresh, CAS-Before-RAS Refresh s Refresh Interval: 512 cycles/8 ms s Available in 40-pin 400 mil SOJ and 40/44L-pin 400 mil TSOP-II packages s Single +5V 10% Power Supply s TTL Interface
Description
The V53C818H is a 524,288 x 16 bit highperformance CMOS dynamic random access memory. The V53C818H offers Page mode operation with Extended Data Output. An address, CAS and RAS input capacitances are reduced to one half when the 256K x 16 DRAM is used to construct the same memory density. The V53C818H has asymmetric address, 10-bit row and 9-bit column. All inputs are TTL compatible. EDO Page Mode operation allows random access up to 512 x 16 bits, within a page, with cycle times as short as 15ns. The V53C818H is ideally suited for graphics, digital signal processing and high performance peripherals.
Device Usage Chart
Operating Temperature Range 0C to 70 C Package Outline K * T * 30 * Access Time (ns) 35 * 40 * 45 * 50 * Power Std. * Temperature Mark Blank
V53C818H Rev. 1.2 May 1997
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MOSEL VITELIC
V 5 3 C 8 1 8 H
V53C818H
FAMILY
DEVICE K (SOJ) T (TSOP-II)
PKG
SPEED ( t RAC)
TEMP. PWR. BLANK (0C to 70C) BLANK (NORMAL)
Description SOJ TSOP-II
Pkg. K T
Pin Count 40 40/44L
30 35 40 45 50
(30 ns) (35 ns) (40 ns) (45 ns) (50 ns)
818H-01
40-Pin SOJ PIN CONFIGURATION Top View
Vcc I/O1 I/O2 I/O3 I/O4 Vcc I/O5 I/O6 I/O7 I/O8 NC NC WE RAS A9 A0 A1 A2 A3 Vcc
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21
818H-02
40/44 Pin Plastic TSOP-II PIN CONFIGURATION Top View
Vcc I/O1 I/O2 I/O3 I/O4 Vcc I/O5 I/O6 I/O7 I/O8
1 2 3 4 5 6 7 8 9 10 44 43 42 41 40 39 38 37 36 35
Vss I/O16 I/O15 I/O14 I/O13 Vss I/O12 I/O11 I/O10 I/O9 NC LCAS UCAS OE A8 A7 A6 A5 A4 Vss
Vss I/O16 I/O15 I/O14 I/O13 Vss I/O12 I/O11 I/O10 I/O9
NC NC WE RAS A9 A0 A1 A2 A3 Vcc
13 14 15 16 17 18 19 20 21 22
32 31 30 29 28 27 26 25 24 23
818H-03
NC LCAS UCAS OE A8 A7 A6 A5 A4 Vss
Pin Names
A0-A9 RAS UCAS LCAS WE OE I/O1-I/O16 VCC VSS NC Address Inputs Row Address Strobe Column Address Strobe/Upper Byte Control Column Address Strobe/Lower Byte Control Write Enable Output Enable Data Input, Output +5V Supply 0V Supply No Connect
V53C818H Rev. 1.2 May 1997
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MOSEL VITELIC
Absolute Maximum Ratings*
Ambient Temperature Under Bias ..................................... -10C to +80C Storage Temperature (plastic) ..... -55C to +125C Voltage Relative to VSS .................-1.0 V to +7.0 V Data Output Current ..................................... 50 mA Power Dissipation .......................................... 1.4 W
*Note: Operation above Absolute Maximum Ratings can adversely affect device reliability.
V53C818H
Capacitance*
Symbol CIN1 CIN2 COUT
TA = 25C, VCC = 5 V 10%, VSS = 0 V
Parameter Address Input RAS, CAS, WE, OE Data Input/Output Typ. 3 4 5 Max. 4 5 7 Unit pF pF pF
* Note: Capacitance is sampled and not 100% tested
Block Diagram
512K x 16
OE WE UCAS LCAS RAS
RAS CLOCK GENERATOR
CAS CLOCK GENERATOR
WE CLOCK GENERATOR
OE CLOCK GENERATOR
VCC VSS
DATA I/O BUS COLUMN DECODERS
Y -Y8 0
I/O 1 I/O 2 I/O 3
SENSE AMPLIFIERS
512 x 16
I/O BUFFER
I/O 4 I/O 5 I/O 6 I/O 7 I/O 8 I/O 9 I/O 10 I/O 11
REFRESH COUNTER
9 A0 A1
ADDRESS BUFFERS AND PREDECODERS
X0 -X9
ROW DECODERS
1024
* * *
A7 A9
MEMORY ARRAY 1024 x 512 x 16
I/O 12 I/O 13 I/O 14 I/O 15 I/O 16
818H-04
V53C818H Rev. 1.2 May 1997
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MOSEL VITELIC
DC and Operating Characteristics (1-2)
TA = 0C to 70C, VCC = 5 V 10%, VSS = 0 V, unless otherwise specified.
Access Time V53C818H Min.
-10
V53C818H
Symbol
ILI ILO ICC1
Parameter
Input Leakage Current (any input pin) Output Leakage Current (for High-Z State) VCC Supply Current, Operating
Typ.
Max.
10
Unit
A A mA
Test Conditions
VSS VIN VCC VSS VOUT VCC RAS, CAS at VIH tRC = tRC (min.)
Notes
-10
10
30 35 40 45 50
240 230 220 210 200 4
1, 2
ICC2 ICC3
VCC Supply Current, TTL Standby VCC Supply Current, RAS-Only Refresh 30 35 40 45 50
mA
RAS, CAS at VIH other inputs VSS tRC = tRC (min.) 2
240 230 220 210 200 230 220 210 200 190 2
mA
ICC4
VCC Supply Current, EDO Page Mode Operation
30 35 40 45 50
mA
Minimum Cycle
1, 2
ICC5
VCC Supply Current, Standby, Output Enabled other inputs VSS VCC Supply Current, CMOS Standby
mA
RAS = VIH, CAS = VIL
1
ICC6
2
mA
RAS VCC - 0.2 V, CAS VCC- 0.2 V, All other inputs VSS
VCC VIL VIH VOL VOH
Supply Voltage Input Low Voltage Input High Voltage Output Low Voltage Output High Voltage
4.5 -1 2.4
5.0
5.5 0.8 VCC + 1 0.4
V V V V V IOL = 4.2 mA IOH = -5.0 mA 3 3
2.4
V53C818H Rev. 1.2 May 1997
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MOSEL VITELIC
TA = 0C to 70C, VCC = +5V 10%, VSS = 0V unless otherwise noted AC Test conditions, input pulse levels 0 to 3V
30 # Symbol Parameter
1 2 3 4 5 6 7 8 9 10 11 12 13 14 tRAS tRC tRP tCSH tCAS tRCD tRCS tASR tRAH tASC tCAH tRSH (R) tCRP tRCH tRRH tROH tOAC tCAC tRAC tCAA tLZ tHZ tAR tRAD tRSH (W) tCWL tWCS tWCH RAS Pulse Width Read or Write Cycle Time RAS Precharge Time CAS Hold Time CAS Pulse Width RAS to CAS Delay Read Command Setup Time Row Address Setup Time Row Address Hold Time Column Address Setup Time Column Address Hold Time RAS Hold Time (Read Cycle) CAS to RAS Precharge Time Read Command Hold Time Referenced to CAS Read Command Hold Time Referenced to RAS RAS Hold Time Referenced to OE Access Time from OE Access Time from CAS Access Time from RAS Access Time from Column Address OE or CAS to Low-Z Output OE or CAS to High-Z Output Column Address Hold Time from RAS RAS to Column Address Delay Time RAS or CAS Hold Time in Write Cycle Write Command to CAS Lead Time Write Command Setup Time Write Command Hold Time 0 0 26 5
V53C818H
AC Characteristics
35
40
45
50
Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Unit Notes
30 65 25 30 5 15 0 0 5 0 5 10 5 0 20 75K 35 70 25 35 6 16 0 0 6 0 5 10 5 0 24 75K 40 75 25 40 7 17 0 0 7 0 5 10 5 0 28 75K 45 80 25 45 8 18 0 0 8 0 6 10 5 0 32 75K 50 90 30 50 9 19 0 0 9 0 7 10 5 0 36 75K ns ns ns ns ns ns ns ns ns ns ns ns ns ns 5 4
15
0
0
0
0
0
ns
5
16
6
7
8
9
10
ns
17 18 19 20
10 10 30 16
11 11 35 18
12 12 40 20
13 13 45 22
14 14 50 24
ns ns ns ns
12 6, 7, 14 6, 8, 9 6, 7, 10
21 22 23
0 0 28 6
0 0 30 6
0 0 35 7
0 0 40 8
ns ns ns
16 16
24
10
14
11
17
12
20
13
23
14
26
ns
11
25
10
10
10
10
10
ns
26
10
11
12
13
14
ns
27 28
0 5
0 5
0 5
0 6
0 7
ns ns
12, 13
V53C818H Rev. 1.2 May 1997
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MOSEL VITELIC
AC Characteristics (Cont'd)
30 # Symbol Parameter
29 30 tWP tWCR tRWL tDS tDH tWOH tOED tRWC tRRW tCWD tRWD tCRW tAWD tPC tCP tCAR tCAP tDHR tCSR tRPC tCHR tPCM tCOH tOES tOEH Write Pulse Width Write Command Hold Time from RAS Write Command to RAS Lead Time Data in Setup Time Data in Hold Time Write to OE Hold Time OE to Data Delay Time Read-Modify-Write Cycle Time Read-Modify-Write Cycle RAS Pulse Width CAS to WE Delay RAS to WE Delay in ReadModify-Write Cycle CAS Pulse Width (RMW) Col. Address to WE Delay EDO Fast Page Mode Read or Write Cycle Time CAS Precharge Time Column Address to RAS Setup Time Access Time from Column Precharge Data in Hold Time Referenced to RAS CAS Setup Time CAS-beforeRAS Refresh RAS to CAS Precharge Time CAS Hold Time CAS-beforeRAS Refresh EDO Page Mode Read-Modify-Write Cycle Time Output Hold After CAS Low OE Low to CAS High Setup Time OE Hold Time from WE during Read-Modify Write Cycle 26
V53C818H
35
40
45
50
Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Unit Notes
5 26 5 28 5 30 6 35 7 40 ns ns
31
10
11
12
13
14
ns
32 33 34 35 36 37
0 5 5 5 100 65
0 5 5 5 105 70
0 5 6 6 110 75
0 6 7 7 115 80
0 7 8 8 130 87
ns ns ns ns ns ns
14 14 14 14
38 39
26 50
28 54
30 58
32 62
34 68
ns ns
12 12
40 41 42
44 32 12
46 35 14
48 38 15
50 41 17
52 42 19
ns ns ns 12
43 44
3 16
4 18
5 20
6 22
7 24
ns ns
45
19
21
23
25
27
ns
7
46
28
30
35
40
ns
47
10
10
10
10
10
ns
48 49
0 7
0 8
0 8
0 10
0 12
ns ns
50
56
58
60
65
70
ns
51 52
5 5
5 5
5 5
5 5
5 5
ns ns
53
10
10
10
10
10
ns
V53C818H Rev. 1.2 May 1997
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MOSEL VITELIC
AC Characteristics (Cont'd)
30 # Symbol Parameter
54 55 56 tOEP tT tREF OE High Pulse Width Transition Time (Rise and Fall) Refresh Interval (512 Cycles)
V53C818H
35
40
45
50
Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Unit Notes
10 1.5 50 8 10 1.5 50 8 10 1.5 50 8 10 1.5 50 8 10 1.5 50 8 ns ns ms 15 17
Notes:
1. ICC is dependent on output loading when the device output is selected. Specified ICC (max.) is measured with the output open. 2. ICC is dependent upon the number of address transitions. Specified ICC (max.) is measured with a maximum of two transitions per address cycle in EDO Page Mode. 3. Specified VIL (min.) is steady state operating. During transitions, VIL (min.) may undershoot to -1.0 V for a period not to exceed 20 ns. All AC parameters are measured with VIL (min.) VSS and VIH (max.) VCC. 4. tRCD (max.) is specified for reference only. Operation within tRCD (max.) limits insures that tRAC (max.) and tCAA (max.) can be met. If tRCD is greater than the specified tRCD (max.), the access time is controlled by tCAA and tCAC. 5. Either tRRH or tRCH must be satisified for a Read Cycle to occur. 6. Measured with a load equivalent to one TTL input and 50 pF. 7. Access time is determined by the longest of tCAA, tCAC and tCAP. 8. Assumes that tRAD tRAD (max.). If tRAD is greater than tRAD (max.), tRAC will increase by the amount that tRAD exceeds tRAD (max.). 9. Assumes that tRCD tRCD (max.). If tRCD is greater than tRCD (max.), tRAC will increase by the amount that tRCD exceeds tRCD (max.). 10. Assumes that tRAD tRAD (max.). 11. Operation within the tRAD (max.) limit ensures that tRAC (max.) can be met. tRAD (max.) is specified as a reference point only. If tRAD is greater than the specified tRAD (max.) limit, the access time is controlled by tCAA and tCAC. 12. tWCS, tRWD, tAWD and tCWD are not restrictive operating parameters. 13. tWCS (min.) must be satisfied in an Early Write Cycle. 14. tDS and tDH are referenced to the latter occurrence of CAS or WE. 15. tT is measured between VIH (min.) and VIL (max.). AC-measurements assume tT = 3 ns. 16. Assumes a three-state test load (5 pF and a 380 Ohm Thevenin equivalent). 17. An initial 200 s pause and 8 RAS-containing cycles are required when exiting an extended period of bias without clocks. An extended period of time without clocks is defined as one that exceeds the specified Refresh Interval.
V53C818H Rev. 1.2 May 1997
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MOSEL VITELIC
Truth Table
Function
Standby Read: Word Read: Lower Byte
V53C818H
RAS
H L L
LCAS
H L L
UCAS
H L H
WE
X H H
OE
X L L
ADDRESS
X ROW/COL ROW/COL
I/O
High-Z Data Out Lower Byte, Data-Out Upper Byte, High-Z Lower Byte, High-Z Upper Byte, Data-Out Data-In Lower Byte, Data-In Upper Byte, High-Z Lower Byte, High-Z Upper Byte, Data-In Data-Out, Data-In Data-Out Data-In Data-Out, Data-In Data-Out High-Z High-Z
Notes
Read: Upper Byte
L
H
L
H
L
ROW/COL
Write: Word (Early-Write) Write: Lower Byte (Early)
L L
L L
L H
L L
X X
ROW/COL ROW/COL
Read: Upper Byte (Early)
L
H
L
L
X
ROW/COL
Read-Write EDO Page-Mode Read EDO Page-Mode Write EDO Page-Mode Read-Write Hidden Refresh Read RAS-Only Refresh CBR Refresh
L L L L LHL L HL
L HL HL HL L H L
L HL HL HL L H L
HL H L HL H X X
LH L X LH L X X
ROW/COL COL COL COL ROW/COL ROW X
1, 2 2 2 1, 2 2
3
Notes:
1. Byte Write cycles LCAS or UCAS active. 2. Byte Read cycles LCAS or UCAS active. 3. Only one of the two CAS must be active (LCAS or UCAS).
V53C818H Rev. 1.2 May 1997
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MOSEL VITELIC
Waveforms of Read Cycle
t RAS (1) t RC (2) t RP (3)
V53C818H
RAS
VIH VIL t CRP (13)
t AR (23)
t RCD (6) t RAD (24)
t CSH (4)
CAS UCAS, LCAS
VIH VIL t ASR (8) t RAH (9)
t RSH (R)(12) t CAS (5)
t CRP (13)
t ASC (10)
t CAH (11)
ADDRESS
VIH VIL
ROW ADDRESS
COLUMN ADDRESS t CAR (44) t RCH (14) t RRH (15)
t RCS (7) WE VIH VIL
t ROH (16) t CAA (20) t OAC (17) t OES (52)
OE
VIH VIL
I/O
VOH VOL
t RAC (19)
t CAC (18)
t HZ (22) VALID DATA-OUT
t HZ (22)
t LZ (21)
676 01
Waveforms of Early Write Cycle
t RC (2) t RAS (1) RAS VIH V IL t CSH (4) tCRP (13) VIH t RCD (6) t RSH (W)(25) t CAS (5) t CRP (13) tAR (23) t RP (3)
UCAS, LCAS
V IL t RAH (9) tASR (8) tASC (10) ROW ADDRESS t RAD (24) t CWL (26) VIH V IL t WCR (30) t RWL (31) VIH V IL t DHR (46) tDS (32) tDH (33) VALID DATA-IN HIGH-Z
676 02
t CAR (44) t CAH (11)
ADDRESS
VIH V IL
COLUMN ADDRESS t WCH (28) t WP(29) tWCS (27)
WE
OE
I/O
VIH V IL
Don't Care
Undefined
V53C818H Rev. 1.2 May 1997
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MOSEL VITELIC
Waveforms of OE-Controlled Write Cycle
t AR (23) t RAS (1) t RC (2) t RP (3)
V53C818H
RAS
V IH V IL t CRP (13)
t RCD (6)
t CSH (4)
UCAS, LCAS CAS
V IH V IL t RAD (24) t RAH (9)
t RSH (W)(12) t CAS (5)
t CRP (13)
t CAR (44) t CAH (11) t ASC (10)
t ASR (8) ADDRESS V IH V IL
ROW ADDRESS
COLUMN ADDRESS t CWL (26) t RWL (31)
t WP (29) WE V IH V IL
t WOH (34) OE V IH V IL t OED (35) V IH V IL t DH (33) t DS (32) VALID DATA-IN
676 03
I/O
Waveforms of Read-Modify-Write Cycle
t RWC (36) tRRW (37) RAS VIH VIL t CSH (4) t CRP (13) CAS UCAS, LCAS VIH VIL t RAH (9) t ASR (8) ADDRESS VIH VIL ROW ADDRESS t RAD (24) t ACS VIH VIL VIH VIL t OED (35) t CAC (18) t RAC (19) I/O VIH VIL VOH VOL t LZ (21) VALID DATA-OUT t HZ (22) t DS (32) VALID DATA-IN
675 04
t RP (3)
t AR (23)
t RCD (6)
t RSH (W)(25) t CRW (40) t t ASC (10) COLUMN ADDRESS t AWD (41) t CWD (38) t RWL (31) t CWL (26)
t CRP (13)
CAH (11)
t RWD (39)
t WP (29)
WE
t CAA (20) t OAC (17) t OEH (53) t DH (33)
OE
Don't Care
Undefined
V53C818H Rev. 1.2 May 1997
10
MOSEL VITELIC
Waveforms of EDO Page Mode Read Cycle
RAS V IH V IL t AR (23) t RCD (6) t CRP (13) UCAS, LCAS V IH V IL t RAH (9) t CSH (4) t ASC (10) t CAH (11) COLUMN ADDRESS t RCH (14) t CAH (11) t CAA (20) t OAC (17) OE V IH V IL t RAC (19) t CAC (18) t LZ (21) t RCS (7) t CAR (44) t CAH (11) COLUMN ADDRESS t RCS (7) t PC (42) t CP (43) t RSH (R)(12) t CAS (5) t CRP (13) t CAS (5) t RAS (1) t
V53C818H
RP (3)
t CAS (5)
t ASR (8) ADDRESS V IH V IL
t ASC (10) ROW ADDRESS t RCS (7)
COLUMN ADDRESS
t RCH (14)
WE
V IH V IL t CAP (45) t OES (52) t OEP (54) t CAC (18) t CAA (20) t OAC (17) t RRH (15)
t CAC (18) t COH (5)
t HZ (22) t HZ (22) t HZ (22) VALID DATA OUT
t HZ (22) VALID DATA OUT t LZ
I/O
V OH V OL
VALID DATA OUT
2736 09
Waveforms of EDO Page Mode Write Cycle
t AR (23) RAS V IH V IL t CRP (13) t RCD (6) UCAS, LCAS V IH V IL t RAH (9) t ASR (8) ADDRESS V IH V IL t RAD (24) t WCS (27) t WP (29) WE V IH V IL
ROW ADD COLUMN ADDRESS
t RP (3) t RAS (1)
t PC (42) t CP (43) t CAS (5)
t RSH (W)(25) t CAS (5) t CAS (5)
t CRP (13)
t CSH (4) t ASC (10)
COLUMN ADDRESS
t CAH (11)
t CAH (11)
t ASC (10)
t CAR (44) t CAH (11)
COLUMN ADDRESS
t CWL (26)
t WCH (28)
t WCS (27)
t CWL (26)
t WCH (28) t WP (29)
t WCS (27)
t CWL (26) t RWL (31) t WCH (28) t WP (29)
OE
VIH V IL t DS (32) t DH (33)
VALID DATA IN
t DS (32)
t DH (33)
VALID DATA IN
t DS (32)
t DH (33)
VALID DATA IN
I/O
V IH V IL
OPEN
OPEN 2736 10
Don't Care
Undefined
V53C818H Rev. 1.2 May 1997
11
MOSEL VITELIC
Waveforms of EDO Page Mode Read-Write Cycle
RAS VIH V
IL
V53C818H
t RAS (1)
t RCD (6)
t CSH (4) t PCM (50) t CAS (5)
t RP (3) t RSH (W)(25) t CRP (13) t CAS (5)
t CP (43) t CAS (5)
V UCAS, LCAS V
IH IL
t RAD (24) t RAH (9) t ASR (8) t ASC (10) t ASC (10)
COLUMN ADDRESS
t CAH (11)
COLUMN ADDRESS
t CAH (11)
t ASC (10)
t CAR (44) t CAH (11)
COLUMN ADDRESS
V ADDRESS V
IH IL
ROW ADD
t RWD (39) t CWD (38) V WE V
IH IL
t CWL (26)
t CWD (38) t CWL (26)
t CWD (38) t RWL (31) t CWL (26)
t CAA (20) t OAC (17) V OE V
IH IL
t AWD (41)
t AWD (41) t WP (29) t OAC (17) t OEH (53) t CAA (20) t CAP (43)
t AWD (41) t OAC (17) t WP (29) t WP (29)
t OED (35) t CAC (18) t RAC (19)
t OED (35) t CAC (18) t DH (33)
t CAP (43) t CAA (20)
t HZ (22)
t HZ (22)
t DS (32) I/O V I/OH V I/OL t LZ (21)
OUT IN OUT
t DH (33) t DS (32)
t OED (35) t CAC (18) t HZ (22) t DH (33) t DS (32)
OUT IN 2736 11
IN
t LZ
t LZ
Waveforms of RAS-Only Refresh Cycle
t RC (2) t RP (3)
RAS VIH V IL t CRP (13) VIH V IL tASR (8) t RAH (9) VIH V IL NOTE: WE, OE = Don't care t RAS (1)
UCAS, LCAS
ADDRESS
ROW ADD
2736 12
Don't Care
Undefined
V53C818H Rev. 1.2 May 1997
12
MOSEL VITELIC
Waveforms of CAS-before-RAS Refresh Counter Test Cycle
V53C818H
t RAS (1) RAS VIH V IL t CSR (47) UCAS, LCAS VIH V IL VIH V IL READ CYCLE WE VIH V IL t ROH (16) t OAC (17) OE VIH V IL t LZ (21) I/O VIH V IL WRITE CYCLE WE VIH V IL VIH V IL tDS (32) I/O VIH V IL t DH (33) D IN t RWL (31) t CWL (26) t WCS (27) t WCH (28) DOUT t CHR (49) t CP(43) t RSH (W)(25) tCAS (5)
t RP (3)
ADDRESS
t RCS (7)
t RRH (15) t RCH (14)
t HZ (22) t HZ (22)
OE
676 12
Waveforms of CAS-before-RAS Refresh Cycle
t RP (3) RAS V IH V IL t CP (43) V IH V IL t HZ (22) I/O V OH V OL NOTE: WE, OE, A0-A8 = Don't care
Don't Care Undefined
675 07
t RC (2) t RAS (1) t RP (3)
t RPC (48) t CSR (47)
t CHR (49)
CAS
V53C818H Rev. 1.2 May 1997
13
MOSEL VITELIC
Waveforms of Hidden Refresh Cycle (Read)
tRC (2) VIH V IL tRCD (6) t CRP (13) UCAS, LCAS VIH V IL tASR (8) t RAH (9) ADDRESS VIH V IL VIH V IL t CAA (20) VIH V IL t CAC (18) t LZ (21) t RAC (19) VOH I/O VOL VALID DATA t HZ (22) t HZ (22) t OAC (17)
ROW ADD
V53C818H
t RAS (1) tAR (23)
t RP (3)
tRC (2) t RAS (1)
t RP (3)
RAS
tRSH (R)(12)
t CHR (49)
tCRP (13)
tRAD (24) tASC (10) t CAH (11)
COLUMN ADDRESS
tRCS (7) WE
t RRH (15)
OE
676 10
Waveforms of Hidden Refresh Cycle (Write)
t RC (2) VIH V IL t RCD (6) t CRP (13) UCAS, LCAS VIH V IL tASR (8) t RAH (9) ADDRESS VIH V IL VIH V IL VIH V IL t DS (32) VIH I/O V IL tDH (33)
VALID DATA-IN ROW ADD
t RC (2) tRP (3) t RAS (1) tRP (3)
t RAS (1) tAR (23)
RAS
t RSH (12)
t CHR (49)
t CRP (13)
tRAD (24) tASC (10) t CAH (11)
COLUMN ADDRESS
t WCS (27) WE
t WCH (28)
OE
t DHR (46)
676 11
Don't Care
Undefined
V53C818H Rev. 1.2 May 1997
14
MOSEL VITELIC
V53C818H
Waveforms of EDO-Page-Mode Read-Early-Write Cycle (Pseudo Read-Modify-Write)
tRAS RAS V IH V IL tCSH tPC tCRP V IH V IL tAR tRAD tASR V IH V IL tRAH tASC tCAH tASC tCAH tASC tCAH tCAR tRCD tCAS tCP tCAS tPC tCP tRSH tCAS tCP tRP
UCAS, LCAS
ADDRESS
ROW ADDRESS
COLUMN ADDRESS
COLUMN ADDRESS
COLUMN ADDRESS
tRCS V IH V IL tRAC tCAC tOE OE V IH V IL
tRCH tWCS tWCH
WE
tCAA tCAP
tCAA
tCAC
tDS
tDH
tCOH I/O VOH VOL
VALID DATA OUT VALID DATA OUT VALID DATA IN
Don't Care
Undefined
Functional Description
The V53C818H is a CMOS dynamic RAM optimized for high data bandwidth, low power applications. It is functionally similar to a traditional dynamic RAM. The V53C818H reads and writes data by multiplexing an 18-bit address into a 10-bit row and a 9-bit column address. The row address is latched by the Row Address Strobe (RAS). The column address "flows through" an internal address buffer and is latched by the Column Address Strobe (CAS). Because access time is primarily dependent on a valid column address rather than the precise time that the CAS edge occurs, the delay time from RAS to CAS has little effect on the access time.
Read Cycle
A Read cycle is performed by holding the Write Enable (WE) signal High during a RAS/CAS operation. The column address must be held for a minimum specified by tAR. Data Out becomes valid only when tOAC, tRAC, tCAA and tCAC are all satisifed. As a result, the access time is dependent on the timing relationships between these parameters. For example, the access time is limited by tCAA when tRAC, tCAC and tOAC are all satisfied.
Write Cycle
A Write Cycle is performed by taking WE and CAS low during a RAS operation. The column address is latched by CAS. The Write Cycle can be WE controlled or CAS controlled depending on whether WE or CAS falls later. Consequently, the input data must be valid at or before the falling edge of WE or CAS, whichever occurs last. In the CAScontrolled Write Cycle, when the leading edge of WE occurs prior to the CAS low transition, the I/O data pins will be in the High-Z state at the beginning of the Write function. Ending the Write with RAS or CAS will maintain the output in the High-Z state. In the WE controlled Write Cycle, OE must be in the high state and tOED must be satisfied.
15
Memory Cycle
A memory cycle is initiated by bringing RAS low. Any memory cycle, once initiated, must not be ended or aborted before the minimum tRAS time has expired. This ensures proper device operation and data integrity. A new cycle must not be initiated until the minimum precharge time tRP/tCP has elapsed.
V53C818H Rev. 1.2 May 1997
MOSEL VITELIC
Extended Data Output Page Mode
EDO Page operation permits all 512 columns within a selected row of the device to be randomly accessed at a high data rate. Maintaining RAS low while performing successive CAS cycles retains the row address internally and eliminates the need to reapply it for each cycle. The column address buffer acts as a transparent or flow-through latch while CAS is high. Thus, access begins from the occurrence of a valid column address rather than from the falling edge of CAS, eliminating tASC and tT from the critical timing path. CAS latches the address into the column address buffer. During EDO operation, Read, Write, Read-Modify-Write or Read-Write-Read cycles are possible at random addresses within a row. Following the initial entry cycle into Hyper Page Mode, access is tCAA or tCAP controlled. If the column address is valid prior to the rising edge of CAS, the access time is referenced to the CAS rising edge and is specified by tCAP. If the column address is valid after the rising CAS edge, access is timed from the occurrence of a valid address and is specified by tCAA. In both cases, the falling edge of CAS latches the address and enables the output. EDO provides a sustained data rate of 83 MHz for applications that require high bandwidth such as bitmapped graphics or high-speed signal processing. The following equation can be used to calculate the maximum data rate: 512 Data Rate = ---------------------------------------t RC + 511 x t PC
V53C818H
OE signal has no effect on any data stored in the output latches. A WE low level can also disable the output drivers when CAS is low. During a Write cycle, if WE goes low at a time in relationship to CAS that would normally cause the outputs to be active, it is necessary to use OE to disable the output drivers prior to the WE low transition to allow Data In Setup Time (tDS) to be satisfied.
Power-On
After application of the VCC supply, an initial pause of 200 s is required followed by a minimum of 8 initialization cycles (any combination of cycles containing a RAS clock). Eight initialization cycles are required after extended periods of bias without clocks (greater than the Refresh Interval). During Power-On, the VCC current requirement of the V53C818H is dependent on the input levels of RAS and CAS. If RAS is low during Power-On, the device will go into an active cycle and ICC will exhibit current transients. It is recommended that RAS and CAS track with VCC or be held at a valid VIH during Power-On to avoid current surges.
Table 1. V53C818H Data Output
Operation for Various Cycle Types
Cycle Type
Read Cycles CAS-Controlled Write Cycle (Early Write) WE-Controlled Write Cycle (Late Write) Read-Modify-Write Cycles EDO Read Cycle EDO Write Cycle (Early Write) EDO Read-ModifyWrite Cycle RAS-only Refresh CAS-before-RAS Refresh Cycle CAS-only Cycles
I/O State
Data from Addressed Memory Cell High-Z OE Controlled. High OE = High-Z I/Os Data from Addressed Memory Cell Data from Addressed Memory Cell High-Z Data from Addressed Memory Cell High-Z Data remains as in previous cycle High-Z
Data Output Operation
The V53C818H Input/Output is controlled by OE, CAS, WE and RAS. A RAS low transition enables the transfer of data to and from the selected row address in the Memory Array. A RAS high transition disables data transfer and latches the output data if the output is enabled. After a memory cycle is initiated with a RAS low transition, a CAS low transition or CAS low level enables the internal I/O path. A CAS high transition or a CAS high level disables the I/O path and the output driver if it is enabled. A CAS low transition while RAS is high has no effect on the I/O data path or on the output drivers. The output drivers, when otherwise enabled, can be disabled by holding OE high. The
V53C818H Rev. 1.2 May 1997
16
MOSEL VITELIC
Package Diagrams
40-Pin Plastic SOJ
1.025 TYP. (1.035 MAX.) [26.04 TYP. (26.29 MAX.)] 40 21 Unit in inches [mm]
V53C818H
0.400 0.005 [10.16 0.127]
0.440 0.005 [11.18 0.127]
1
20 0.026 MIN [0.660 MIN] 0.144 MAX [3.66 MAX]
0.010
+ 0.004 - 0.002
+0.004 0.025 -0.002
+0.102 0.635 -0.051
+0.102 0.254 -0.051
0.050 0.006 [1.27 0.152]
0.1 [2.54]
0.18 [4.57] M
+0.004 0.018 -0.002
+0.102 0.457 -0.051
40/44L-Pin TSOP-II
0.0047 - 0.0083 [0.119 - .211] 40 21 Unit in inches [mm]
0.017 - 0.023 [0.432 - 0.584]
0.462 - 0.470 [11.73 - 11.94]
0.396 - 0.404 [10.06 - 10.26]
1 0.0315 BSC [.8001 BSC] 0.039 - 0.047 [0.991 - 1.193] 0.721 - 0.729 [18.31 - 18.52] 0.012 - 0.016 [0.305 - 0.406]
20 0-5 0.002 - 0.008 [0.051 - 0.203] BASE PLANE SEATING PLANE
V53C818H Rev. 1.2 May 1997
17
0.368 0.010 [9.35 0.254]
MOSEL VITELIC
U.S.A.
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WORLDWIDE OFFICES
TAIWAN
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V53C818H
JAPAN
RM.302 ANNEX-G HIGASHI-NAKANO NAKANO-KU, TOKYO 164 PHONE: 011-81-03-3365-2851 FAX: 011-81-03-3365-2836
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U.S. SALES OFFICES
NORTHWESTERN
3910 NORTH FIRST STREET SAN JOSE, CA 95134 PHONE: 408-433-6000 FAX: 408-433-0185
SOUTHWESTERN
SUITE 200 5150 E. PACIFIC COAST HWY. LONG BEACH, CA 90804 PHONE: 310-498-3314 FAX: 310-597-2174
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(c) Copyright 1997, MOSEL VITELIC Inc.
5/97 Printed in U.S.A.
The information in this document is subject to change without notice. MOSEL VITELIC makes no commitment to update or keep current the information contained in this document. No part of this document may be copied or reproduced in any form or by any means without the prior written consent of MOSEL-VITELIC.
MOSEL VITELIC subjects its products to normal quality control sampling techniques which are intended to provide an assurance of high quality products suitable for usual commercial applications. MOSEL VITELIC does not do testing appropriate to provide 100% product quality assurance and does not assume any liability for consequential or incidental arising from any use of its products. If such products are to be used in applications in which personal injury might occur from failure, purchaser must do its own quality assurance testing appropriate to such applications.
MOSEL VITELIC
3910 N. First Street, San Jose, CA 95134-1501 Ph: (408) 433-6000 Fax: (408) 433-0952 Tlx: 371-9461

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