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32k x 8 power switched and reprogrammable prom cy7c271 cy7c274 cypress semiconductor corporation ? 3901 north first street san jose ca 95134 408-943-2600 document #: 38-04008 rev. ** revised march 4, 2002 74 features ? cmos for optimum speed/power windowed for reprogrammability high speed ? 30 ns (commercial) ? 35 ns (military) low power ? 660 mw (commercial) ? 715 mw (military) super low standby power ? less than 165 mw when deselected eprom technology 100% programmable slim 300-mil package (7c271) direct replacement for bipolar proms capable of withstanding >2001v static discharge functional description the cy7c271 and cy7c274 are high-performance 32,768-word by 8-bit cmos proms. when disabled (ce high), the 7c271/7c274 automatically powers down into a low-power stand-by mode. the cy7c271 is packaged in the 300-mil slim package. the cy7c274 is packaged in the indus- try standard 600-mil package. both the 7c271 and 7c274 are available in a cerdip package equipped with an erasure win- dow to provide for reprogrammability. when exposed to uv light, the prom is erased and can be reprogrammed. the memory cells utilize proven eprom floating gate technology and byte-wide intelligent programming algorithms. the cy7c271 and cy7c274 offer the advantage of lower power, superior performance, and programming yield. the eprom cell requires only 12.5v for the super voltage, and low current requirements allow for gang programming. the eprom cells allow each memory location to be tested 100% because each location is written into, erased, and repeatedly exercised prior to encapsulation. each prom is also tested for ac performance to guarantee that after customer program- ming, the product will meet dc and ac specification limits. reading the 7c271 is accomplished by placing active low signals on cs 1 and ce , and an active high on cs 2 . reading the 7c274 is accomplished by placing active low signals on oe and ce . the contents of the memory location addressed by the address lines (a 0 ? a 14 ) will become available on the output lines (o 0 ? o 7 ). logicblockdiagram pin configurations 1 2 3 4 5 6 7 8 9 10 11 12 16 17 18 19 20 24 23 22 21 13 14 25 28 27 26 a 8 a 7 a 6 a 5 a 4 a 3 a 2 a 1 a 0 o 0 o 1 o 2 gnd v cc a 11 a 12 a 13 o 7 o 6 o 4 o 5 o 3 a 12 a 11 a 9 a 8 a 7 a 6 a 5 a 4 a 3 a 2 a 1 a 0 power ? down o 7 o 6 o 5 o 4 o 3 o 2 o 1 o 0 ce 256 x 1024 programable array 8 x 1 of 128 multiplexer 12 31 4 5 6 7 8 9 10 32 1 30 13 14151617 26 25 24 23 22 21 11 v cc a 5 a 4 a 3 a 2 a 6 a 1 a 13 a 14 o 7 o 6 o 4 gnd a 12 a 7 a 8 o 3 o 1 181920 27 28 29 32 nc o 5 nc 15 a 10 a 13 (7c271) cs 1 (7c274) oe a 9 a 10 a 14 cs 1 cs 2 ce a 9 a 10 a 11 cs 1 cs 2 o 0 a 14 1 2 3 4 5 6 7 8 9 10 11 12 16 17 18 19 20 24 23 22 21 13 14 25 28 27 26 12 31 4 5 6 7 8 9 10 32 1 30 13 14151617 26 25 24 23 22 21 11 a 7 v cc a 12 181920 27 28 29 32 15 nc a 14 a 13 a 12 a 7 a 6 a 5 a 4 a 3 a 2 a 1 a 0 o 0 o 1 o 2 gnd v cc a 13 a 8 a 9 o 7 o 6 o 4 o 5 o 3 a 9 a 11 o 7 o 6 a 8 v pp a 14 (7c271) cs 2 7c271 7c274 nc a 11 oe a 10 ce nc ce o 2 a 0 nc a 5 a 4 a 3 a 2 a 6 a 1 o 0 a 0 v pp nc oe a 10 ce o 4 gnd o 3 o 1 nc o 5 o 2 dip/flatpack dip/flatpack lcc/plcc (opaque only) 7c271 7c274 x address y address lcc/plcc (opaque only)
cy7c271 cy7c274 document #: 38-04008 rev. ** page 2 of 15 maximum ratings (above which the useful life may be impaired. for user guide- lines, not tested.) storage temperature ..................................... ? 65 c to +150 c ambient temperature with power applied ..................................................? 55 c to +125 c supply voltage to ground potential .................? 0.5v to +7.0v dc voltage applied to outputs in high z state .....................................................? 0.5v to +7.0v dc input voltage .................................................? 3.0v to +7.0v dc program voltage .....................................................13.0v static discharge voltage ........................................... >2001v (per mil-std-883, method 3015) latch-up current..................................................... >200 ma uv exposure ................................................ 7258 wsec/cm 2 selection guide 7c271-30 7c274-30 7c271-35 7c274-35 7c271-45 7c274-45 7c271-55 7c274-55 maximum access time (ns) 30 35 45 55 maximum operating current (ma) com ? l 120 120 120 120 military 130 130 130 standby current (ma) com ? l 30 30 30 30 military 40 40 40 operating range range ambient temperature v cc commercial 0 c to +70 c 5v 10% industrial [1] ? 40 c to +85 c 5v 10% military [2] ? 55 c to +125 c 5v 10% electrical characteristics over the operating range [3] 7c271-30, 35, 45, 55 7c274-30, 35, 45, 55 parameter description test conditions min. max. unit v oh output high voltage v cc = min., i oh = ? 2.0 ma 2.4 v v ol output low voltage v cc = min., i ol = 8.0 ma [4] 0.4 v v ih input high level guaranteed input logical high voltage for all inputs 2.0 v cc v v il input low level guaranteed input logical low voltage for all inputs 0.8 v i ix input current gnd < v in < v cc ? 10 +10 a i oz output leakage current gnd < v out < v cc , output disabled ? 40 +40 a i os output short circuit current [5] v cc = max., v out = gnd ? 20 ? 90 ma i cc power supply current v cc = max., v in = 2.0v, i out = 0 ma, ce =v il commercial 120 ma military 130 i sb standby supply current v cc = max., ce = v ih , i out = 0 ma commercial 30 ma military 40 v pp programming supply voltage 12 13 v i pp programming supply current 50 ma v ihp input high programming voltage 3.0 v v ilp input low programming voltage 0.4 v note: 1. contact a cypress representative for information on industrial temperature range specifications. 2. t a is the ? instant on ? case temperature. 3. see the last page of this specification for group a subgroup testing information. 4. 6.0 ma military 5. for test purposes, not more than one output at a time should be shorted. short circuit test duration should not exceed 30 sec onds.
cy7c271 cy7c274 document #: 38-04008 rev. ** page 3 of 15 capacitance [6] parameter description test conditions max. unit c in input capacitance t a = 25 c, f = 1 mhz, v cc = 5.0v 10 pf c out output capacitance 10 pf ac test loads and waveforms [6] 3.0v 5v output r1 500 ? 658 ? mil r2 333 ? (403 ? mil) 30 pf including jig and scope gnd 90% 10% 90% 10% 5ns 5 ns 5v output 5pf including jig and scope (a) normal load (b) highz load output 2.00v commercial equivalent to: th venin equivalent 200 ? all input pulses output 1.90v military 250 ? r1 500 ? 658 ? mil r2 333 ? (403 ? mil) ? switching characteristics over the operating range [3,6] 7c271-30 7c274-30 7c271-35 7c274-35 7c271-45 7c274-45 7c271-55 7c274-55 parameter description min. max. min. max. min. max. min. max. unit t aa address to output valid 30 35 45 55 ns t hzcs chip select inactive to high z (cs 1 and cs 2 , 7c271 only) 20 25 30 30 ns t acs chip select active to output valid (cs 1 and cs 2 , 7c271 only) 20 25 30 30 ns t hzoe output enable inactive to high z (oe , 7c274 only) 20 20 25 25 ns t oe output enable active to output valid (oe , 7c274 only) 20 20 25 25 ns t hzce chip enable inactive to high z (ce only) 35 40 50 60 ns t ace chip enable active to output valid (ce only) 35 40 50 60 ns t pu chip enable active to power up 0 0 0 0 ns t pd chip enable inactive to power down 35 40 50 60 ns t oh output hold from address change 0 0 0 0 ns note: 6. see introduction to cmos proms for general information on testing.
cy7c271 cy7c274 document #: 38-04008 rev. ** page 4 of 15 erasure characteristics wavelengths of light less than 4000 angstroms begin to erase the 7c271 and 7c274 in the windowed package. for this rea- son, an opaque label should be placed over the window if the prom is exposed to sunlight or fluorescent lighting for extend- ed periods of time. the recommended dose of ultraviolet light for erasure is a wavelength of 2537 angstroms for a minimum dose (uv inten- sity exposure time) of 25 wsec/cm 2 . for an ultraviolet lamp with a 12 mw/cm 2 power rating, the exposure time would be approximately 35 minutes. the 7c271 or 7c274 needs to be within 1 inch of the lamp during erasure. permanent damage may result if the prom is exposed to high-intensity uv light for an extended period of time. 7258 wsec/cm 2 is the recommended maximum dosage. programming modes programming support is available from cypress as well as from a number of third-party software vendors. for detailed programming information, including a listing of software pack- ages, please see the prom programming information located at the end of this section. programming algorithms can be ob- tained from any cypress representative. switching waveform note: 7. cs 2 and cs 1 are used on the 7c271 only. oe is used on the 7c274 only. t oh t pu t pd t aa (t oe ) t acs(e) 50% 50% a 0 ? a 14 address v cc supply current cs 2 oe ,ce ,cs 1 o 0 -o 7 previous data valid data valid power-down controlled by ce (t hzoe ) t hzcs(e) high z [7 table 1. cy7c271 mode selection pin function [8] read or output disable a 14 ? a 0 ce cs 2 cs 1 o 7 ? o 0 mode other a 14 ? a 0 vfy pgm v pp d 7 ? d 0 read a 14 ? a 0 v il v ih v il o 7 ? o 0 power down a 14 ? a 0 v ih x x high z output disable a 14 ? a 0 x v il x high z output disable a 14 ? a 0 x x v ih high z program a 14 ? a 0 v ihp v ilp v pp d 7 ? d 0 program verify a 14 ? a 0 v ilp v ihp /v ilp v pp o 7 ? o 0 program inhibit a 14 ? a 0 v ihp v ihp v pp high z blank check a 14 ? a 0 v ilp v ihp /v ilp v pp o 7 ? o 0
cy7c271 cy7c274 document #: 38-04008 rev. ** page 5 of 15 table 2. cy7c274 mode selection pin function [8] read or output disable a 14 ? a 0 oe ce v pp o 7 ? o 0 mode other a 14 ? a 0 vfy pgm v pp d 7 ? d 0 read a 14 ? a 0 v il v il note 9 o 7 ? o 0 output disable a 14 ? a 0 v ih x x high z power down a 14 ? a 0 x v ih x high z program a 14 ? a 0 v ihp v ilp v pp d 7 ? d 0 program verify a 14 ? a 0 v ilp v ihp /v ilp v pp o 7 ? o 0 program inhibit a 14 ? a 0 v ihp v ihp v pp high z blank check a 14 ? a 0 v ilp v ihp /v ilp v pp o 7 ? o 0 note: 8. x can be v il (v ilp ) or v ih (v ihp). 9. v pp should be tied to v cc 5% in read mode. figure 1. programming pinouts 1 2 3 4 5 6 7 8 9 10 11 12 16 17 18 19 20 24 23 22 21 13 14 25 28 27 26 a 9 a 8 a 7 a 6 a 5 a 4 a 3 a 2 a 1 a 0 d 0 d 1 d 2 gnd v cc a 10 a 11 a 12 a 13 a 14 v pp pgm vfy d 7 d 6 d 4 d 5 d 3 12 d 0 31 4 5 6 7 8 9 10 32 1 30 13 14151617 26 25 24 23 22 21 11 a 7 v cc a 6 a 5 a 4 a 3 a 2 a 1 a 0 pgm a 14 nc d 7 d 6 d 4 d 3 d 2 d 1 181920 27 28 29 32 nc nc d 5 15 v pp 7c271 7c271 nc gnd vfy a 13 a 12 a 8 a 9 a 10 a 11 dip top view lcc top view 1 2 3 4 5 6 7 8 9 10 11 12 16 17 18 19 20 24 23 22 21 13 14 25 28 27 26 v pp a 12 a 7 a 6 a 5 a 4 a 3 a 2 a 1 a 0 d 0 d 1 d 2 gnd v cc a 14 a 13 a 8 a 9 a 11 a 10 pgm vfy d 7 d 6 d 4 d 5 d 3 12 d 0 31 4 5 6 7 8 9 10 32 1 30 13 14151617 26 25 24 23 22 21 11 a 7 v cc a 6 a 5 a 4 a 3 a 2 a 1 a 0 pgm a 11 nc d 7 d 6 d 4 d 3 d 2 d 1 181920 27 28 29 32 nc nc d 5 15 7c274 7c274 nc gnd vfy a 9 a 8 a 12 a 13 v pp a 14 a 10 dip top view lcc top view
cy7c271 cy7c274 document #: 38-04008 rev. ** page 6 of 15 typical dc and ac characteristics 1.4 1.6 1.0 0.8 4.0 4.5 5.0 5.5 6.0 ? 55 25 125 1.2 1.1 1.2 1.0 0.8 0.6 4.0 4.5 5.0 5.5 6.0 normalized access time supplyvoltage (v) normalized supply current vs. supply voltage normalized supply current vs. ambienttemperature ambient temperature ( c) supplyvoltage (v) normalized access time vs. supply voltage 0.6 1.2 1.6 1.4 1.2 1.0 0.8 ? 55 125 normalized access time ambient temperature ( c) normalized access time vs. temperature 150 175 125 75 50 25 0.0 1.0 2.0 3.0 output sink current (ma) 0 100 output voltage (v) output sink current vs. output voltage 1.0 0.9 0.8 normalized i cc normalized i cc v cc =5.0v t a =25 c t a =25 c 0.6 0.4 60 50 40 30 20 10 01.0 2.03.0 output source current (ma) output voltage (v) 40 30 20 10 0 200 400 600 800 delta t (ns) aa capacitance (pf) typical access time change vs. output loading 4.0 1000 v cc =4.5v t a =25 c t a =25 c f= f max 25 0 output source current vs. voltage 4.0 c271-14 1.1 1.0 0.9 0.8 0.7 0 50 100 150 200 cycle period (ns) normalized supply current vs. cycle period 250 normalized i cc 0.6 0
cy7c271 cy7c274 document #: 38-04008 rev. ** page 7 of 15 ordering information [10] speed (ns) ordering code package name package type operating range 30 cy7c271-30jc j65 32-lead plastic leaded chip carrier commercial cy7c271-30pc p21 28-lead (300-mil) molded dip cy7c271-30wc w22 28-lead (300-mil) windowed cerdip 35 cy7c271-35jc j65 32-lead plastic leaded chip carrier commercial cy7c271-35pc p21 28-lead (300-mil) molded dip cy7c271-35wc w22 28-lead (300-mil) windowed cerdip cy7c271-35dmb d22 28-lead (300-mil) cerdip military cy7c271-35kmb k74 28-lead rectangular cerpack cy7c271-35lmb l55 32-pin rectangular leadless chip carrier cy7c271-35qmb q55 32-pin windowed rectangular leadless chip carrier cy7c271-35wmb w22 28-lead (300-mil) windowed cerdip 45 cy7c271-45jc j65 32-lead plastic leaded chip carrier commercial cy7c271-45pc p21 28-lead (300-mil) molded dip cy7c271-45wc w22 28-lead (300-mil) windowed cerdip cy7c271-45dmb d22 28-lead (300-mil) cerdip military cy7c271-45kmb k74 28-lead rectangular cerpack cy7c271-45lmb l55 32-pin rectangular leadless chip carrier cy7c271-45qmb q55 32-pin windowed rectangular leadless chip carrier cy7c271-45tmb t74 28-lead windowed cerpack cy7c271-45wmb w22 28-lead (300-mil) windowed cerdip 55 cy7c271-55jc j65 32-lead plastic leaded chip carrier commercial cy7c271-55pc p21 28-lead (300-mil) molded dip cy7c271-55wc w22 28-lead (300-mil) windowed cerdip cy7c271-55dmb d22 28-lead (300-mil) cerdip military CY7C271-55KMB k74 28-lead rectangular cerpack cy7c271-55lmb l55 32-pin rectangular leadless chip carrier cy7c271-55qmb q55 32-pin windowed rectangular leadless chip carrier cy7c271-55tmb t74 28-lead windowed cerpack cy7c271-55wmb w22 28-lead (300-mil) windowed cerdip note: 10. most of these products are available in industrial temperature range. contact a cypress representative for specifications an d product availability.
cy7c271 cy7c274 document #: 38-04008 rev. ** page 8 of 15 ordering information [10] (continued) speed (ns) ordering code package name package type operating range 30 cy7c274-30jc j65 32-lead plastic leaded chip carrier commercial cy7c274-30pc p15 28-lead (600-mil) molded dip cy7c274-30wc w16 28-lead (600-mil) windowed cerdip 35 cy7c274-35jc j65 32-lead plastic leaded chip carrier commercial cy7c274-35pc p15 28-lead (600-mil) molded dip cy7c274-35wc w16 28-lead (600-mil) windowed cerdip cy7c274-35dmb d16 28-lead (600-mil) cerdip military cy7c274-35kmb k74 28-lead rectangular cerpack cy7c274-35lmb l55 32-pin rectangular leadless chip carrier cy7c274-35qmb q55 32-pin windowed rectangular leadless chip carrier cy7c274-35tmb t74 28-lead windowed cerpack cy7c274-35wmb w16 28-lead (600-mil) windowed cerdip 45 cy7c274-45jc j65 32-lead plastic leaded chip carrier commercial cy7c274-45pc p15 28-lead (600-mil) molded dip cy7c274-45wc w16 28-lead (600-mil) windowed cerdip cy7c274-45dmb d16 28-lead (600-mil) cerdip military cy7c274-45kmb k74 28-lead rectangular cerpack cy7c274-45lmb l55 32-pin rectangular leadless chip carrier cy7c274-45qmb q55 32-pin windowed rectangular leadless chip carrier cy7c274-45tmb t74 28-lead windowed cerpack cy7c274-45wmb w16 28-lead (600-mil) windowed cerdip 55 cy7c274-55jc j65 32-lead plastic leaded chip carrier commercial cy7c274-55pc p15 28-lead (600-mil) molded dip cy7c274-55wc w16 28-lead (600-mil) windowed cerdip cy7c274-55dmb d16 28-lead (600-mil) cerdip military cy7c274-55kmb k74 28-lead rectangular cerpack cy7c274-55lmb l55 32-pin rectangular leadless chip carrier cy7c274-55qmb q55 32-pin windowed rectangular leadless chip carrier cy7c274-55tmb t74 28-lead windowed cerpack cy7c274-55wmb w16 28-lead (600-mil) windowed cerdip
cy7c271 cy7c274 document #: 38-04008 rev. ** page 9 of 15 military specifications group a subgroup testing dc characteristics parameter subgroups v oh 1, 2, 3 v ol 1, 2, 3 v ih 1, 2, 3 v il 1, 2, 3 i ix 1, 2, 3 i oz 1, 2, 3 i cc 1, 2, 3 i sb 1, 2, 3 switching characteristics parameter subgroups t aa 7, 8, 9, 10, 11 t acs [11] 7, 8, 9, 10, 11 t oe [12] 7, 8, 9, 10, 11 t ace 7, 8, 9, 10, 11 note: 11. 7c271 only (cs 1 and cs 2 ). 12. 7c274 only. smd cross reference smd number suffix cypress number 5962-89817 01xx cy7c271-55wmb 5962-89817 01yx cy7c271-55tmb 5962-89817 01zx cy7c271-55qmb 5962-89817 02xx cy7c271-45wmb 5962-89817 02yx cy7c271-45tmb 5962-89817 02zx cy7c271-45qmb package diagrams 28-lead (600-mil) cerdip d16 mil-std-1835 d- 10 config. a 51-80019
cy7c271 cy7c274 document #: 38-04008 rev. ** page 10 of 15 package diagrams (continued) 28-lead (300-mil) cerdip d22 mil-std-1835 d-15 config. a 51-80032 28-lead rectangular cerpack k74 mil-std-1835 f-11 config. a 51-80061
cy7c271 cy7c274 document #: 38-04008 rev. ** page 11 of 15 package diagrams (continued) 32-pin rectangular leadless chip carrier l55 mil-std-1835 c-12 51-80068 51-85017-a 28-lead (600-mil) molded dip p15
cy7c271 cy7c274 document #: 38-04008 rev. ** page 12 of 15 package diagrams (continued) 51-85014-b 28-lead (300-mil) molded dip p21 mil-std-1835 c-12 51-80103-*a 32-pin windowed rectangular leadless chip carrier q55
cy7c271 cy7c274 document #: 38-04008 rev. ** page 13 of 15 package diagrams (continued) 28-lead windowed cerpack t74 28-lead (600-mil) windowed cerdip w16 mil-std-1835 d- 10 config. a
cy7c271 cy7c274 document #: 38-04008 rev. ** page 14 of 15 ? cypress semiconductor corporation, 2002. the information contained herein is subject to change without notice. cypress semico nductor corporation assumes no responsibility for the use of any circuitry other than circuitry embodied in a cypress semiconductor product. nor does it convey or imply any license unde r patent or other rights. cypress semiconductor does not authorize its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected t o result in significant injury to the user. the inclusion of cypress semiconductor products in life-support systems application implies that the manufacturer assumes all risk of such use and in do i ng so indemnifies cypress semiconductor against all charges. package diagrams (continued) 28-lead (300-mil) windowed cerdip w22 mil-std-1835 d-15 config. a 51-80087
cy7c271 cy7c274 document #: 38-04008 rev. ** page 15 of 15 document title: cy7c271 cy7c274 32k x 8 power switched and reprogrammable prom document number: 38-04008 rev. ecn no. issue date orig. of change description of change ** 113864 3/8/02 dsg change from spec number: 38-00068 to 38-04008

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