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| NanoAmp Solutions, Inc. 1982 Zanker Road, San Jose, CA 95112 ph: 408-573-8878, FAX: 408-573-8877 www.nanoamp.com ES62UXX256 Family ES62UL256 Family 32Kx8 Bit Ultra-Low Power Asynchronous Static RAM Overview The ES62UXX256 is an integrated memory device containing a low power 256 Kbit Static Random Access Memory organized as 32,768 words by 8 bits. The device is fabricated using an advanced CMOS process and NanoAmp's high-speed/lowpower circuit technology. This device is also designed for very low voltage operation making it quite suitable for battery powered devices having both very low operating and standby currents. The device pinout is compatible with other standard 32k x 8 SRAMs. The ES62UXX256 comes in two speed grades (45 and 25 nsec) and two very broad voltage ranges. Features * * * * * Operating Voltage 1.5 to 3.6 Volts Extended Temperature Range -20 o to +80oC Fast Cycle Time TACC < 25 nS @ 3V Very Low Operating Current ICC < 0.8 mA typical at 2V, 1 Mhz Very Low Standby Current ISB = 50 nA typical FIGURE 1: Operating Envelope Operating Voltage Range 50 Typical ICC (mA) 40 30 Speed/Power 40 Mhz 20 Mhz 20 10 1 Mhz 5 Mhz 0 1 2 VCC (V) 3 4 Stock No. 23003-03 4/99 1 NanoAmp Solutions FIGURE 2: Pin Configurations ES62UL256 Family A14 A12 A7 A6 A5 A4 A3 A2 A1 A0 I/O0 I/O1 I/O2 VSS 1 2 3 4 28 27 26 25 VCC WE A13 A8 A9 A11 OE A10 CE I/O7 I/O6 I/O5 I/O4 I/O3 OE A11 A9 A8 A13 WE VCC A14 A12 A7 A6 A5 A4 A3 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 A10 CE I/O7 I/O6 I/O5 I/O4 I/O3 VSS I/O2 I/O1 I/O0 A0 A1 A2 ES62UL256S (SOP) 5 6 7 8 9 10 11 12 13 14 24 23 22 21 20 19 18 17 16 15 ES62UL256T (TSOP) TABLE 1: Pin Functions Pin Name A0-A14 I/O0 - I/O7 CE OE Pin Function Address Inputs Data Inputs/Outputs Chip Enable (Active Low) Output Enable (Active Low) WE VCC VSS Pin Name Pin Function Write Enable (Active Low) Power Ground FIGURE 3: Functional Block Diagram Input/ Address Inputs A0 - A14 Address Decode Logic 32K x 8 RAM Array Output Mux and Buffers I/O0 - I/O7 Data I/O CE WE OE Control Logic TABLE 2: Functional Description CE H L L L WE X L H H OE X X L H I/O0-I/O7 High Z Data In Data Out High Z MODE Standby Write Read Active POWER Standby Active - Standby* Active - Standby* Active - Standby* *The device will consume active power in this mode whenever addresses are changed Stock No. 23003-03 4/99 2 NanoAmp Solutions ES62UL256 Family TABLE 3: Absolute Maximum Ratings* Item Voltage on any pin relative to VSS Voltage on VCC Supply Relative to VSS Power Dissipation Storage Temperature Operating Temperature Soldering Temperature and Time Symbol VIN,OUT VCC PD TSTG TA TSOLDER Rating -0.3 to V CC+0.3 -0.3 to 4.0 500 -40 to 125 -20 to +80 260 oC, 10sec (Lead only) Unit V V mW o o o C C C *Stresses greater than those listed above may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operating section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. TABLE 4: Operating Characteristics (Over the Specified Temperature Range) Item Supply Voltage Data Retention Voltage Input High Voltage Symbol VCC VDR VIH VIL VOH VOL ILI ILO ICC2 ISB ISB IOH = 200 A IOL = -200 A VIN = 0 to VCC OE = VCC or CE = VCC VIN = VCC or 0V CE = VSS VIN = VCC or 0V tA = 55oC VIN = VCC or 0V tA = 25 oC CE = VCC Test Conditions Min/Max Min Max Min Min Max Min Max Min Max Max Max Typ Max Max L 1.5 3.6 1.2 0.7VCC VCC+0.3 -0.3 0.3VCC VCC-0.2 0.2 0.5 0.5 0.4 * f * V 0.5 * f * V 1.0 Unit V V V Input Low Voltage Output High Voltage Output Low Voltage Input Leakage Current Output Leakage Current Operating Supply Current (Note 1) Max Standby Current (Note 2) Typical Standby Current (Note 2) *Notes V V V A A mA A A Typ 0.05 Note 1. Operating current is a linear function of operating frequency and voltage. You may calculate operating current using the formula shown with operating frequency (f) expressed in Mhz and operating voltage (V) in volts. Example: The L device operating at 2 Mhz at 2.0 volts will draw a typical current of 0.4*2*2 = 1.6 mA. Note 2. This device assumes a standby mode if CE is disabled (high). It will also automatically go into a standby mode whenever all input signals are quiescent (not toggling) regardless of the state of CE. In order to achieve low standby current in the enabled mode (CE low), all inputs must be within 0.2 volts of either VCC or VSS. Stock No. 23003-03 4/99 3 NanoAmp Solutions ES62UL256 Family TABLE 5: Capacitance Item Input Capacitance I/O Capacitance Symbol CIN CI/O Test Condition VIN = 0V VIN = 0V Min Max 5 5 Unit pF pF TABLE 6: Timing Test Conditions (Over the Specified Temperature Range) Item Input Pulse Level Input Rise and Fall Time Input and Output Timing Reference Levels Output Load 0.1VCC to 0.9VCC 5nS 0.5VCC CL = 50pF TABLE 7: Read Cycle Timing 3.0-3.6V Item Read Cycle Time Address Access Time Chip Enable Access Time Output Enable to Valid Output Chip Enable to Low-Z output Output Enable to Low-Z Output Chip Enable to High-Z Output Output Disable to High-Z Output Output Hold from Address Change Symbol tRC tAA tCE tOE tLZ tOLZ tHZ tOHZ tOH Min/Max Min Max Max Max Min Min Min Max Min Max Min 1.5V -45 200 200 200 60 20 20 0 50 0 50 20 45 45 45 15 5 5 0 15 0 15 5 -25 25 25 25 10 5 5 0 10 0 10 5 ns ns ns ns ns ns ns ns ns Units TABLE 8: Write Cycle Timing 3.0-3.6V Item Write Cycle Time Chip Enable to End of Write Address Valid to End of Write Address Set-Up Time Write Pulse Width Write Recovery Time Write to High-Z Output Data to Write Time Overlap Data Hold from Write Time End Write to Low-Z Output Symbol tWC tCW tAW tAS tWP tWR tWHZ tDW tDH tOW Min/Max Min Min Min Min Min Min Min Max Min Min Min 1.5V -45 200 100 100 0 75 0 0 60 60 0 20 45 35 35 0 25 0 0 20 25 0 5 -25 25 20 20 0 15 0 0 15 15 0 5 ns ns ns ns ns ns ns ns ns ns Unit Stock No. 23003-03 4/99 4 NanoAmp Solutions ES62UL256 Family FIGURE 4: Read Cycle Timing (WE = VIH) tRC A0-A14 tAA tCE CE tLZ tOE OE tOLZ D0-D7 Data Valid tOH tOHZ tHZ FIGURE 5: Write Cycle (1) Timing (OE clock) tWC A0-A14 tAW OE tCW CE tWP WE tAS tWHZ tDW Data In tOHZ Data Out High-Z tOW Data tDH tWR Stock No. 23003-03 4/99 5 NanoAmp Solutions ES62UL256 Family FIGURE 6: Write Cycle (2) Timing (OE fixed) tWC A0-A14 tAW tCW CE tAS WE tDW Data In tWHZ Data Out High-Z Data Valid tOW tWP tDH tOH tWR TABLE 9: Ordering Information Part Number ES62UL256-45TC ES62UL256-45SC ES62UL256-25TC ES62UL256-25SC Package 28 pin TSOP 28 pin SOP 28 pin TSOP 28 pin SOP Temperature Range -20 to +80 oC -20 to +80 -20 to +80 -20 to +80 oC oC oC Voltage Range 1.5 to 3.6 V 1.5 to 3.6 V 1.5 to 3.6 V 1.5 to 3.6 V Speed (@ 3V+) 45 ns 45 ns 25 ns 25 ns TABLE 10: Revision History Revision # 01 02 03 Date Nov. 1, 1997 Feb. 1, 1998 Apr. 23, 1999 Initial Formal Release Corrected Temperature Range for Dynamic Testing Eliminated ULL family, Changed UL voltage range to 1.5 to 3.6 Change Description Stock No. 23003-03 4/99 6 |
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