AS5C1008_05

SRAM S RAM Austin Semiconductor, Inc. 128K x 8 SRAM RUGGEDIZED PLASTIC HIGH SPEED SRAM FEATURES • • • • • • • • Access times of 15, 20 and 25 ns Fast output enable (t ) for cache applications AOE Low active power Low standby power Fully static operation, no clock or refresh required TTL Compatible Inputs and Outputs Single +5V power supply Package in Industry-standard 32-pin SOJ NC A6 A5 A4 A3 A2 A1 A0 A16 A15 A14 A13 I/O0 I/O1 I/02 Vss 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 Vcc A7 CE2 WE\ A8 A9 A10 A11 OE\ A12 CE\1 I/O7 I/O6 I/O5 I/O4 I/O3 AS5C1008 PIN ASSIGNMENT (Top View) 32-Pin Plastic SOJ (DJ) OPTIONS • Timing 15ns access 20ns access 25ns access • Package Plastic SOJ* MARKING -15 -20 -25 DJ No. 905 • Operating Temperature Ranges -Military (-55oC to +125oC) -Industrial (-40oC to +85oC) XT IT PIN FUNCTIONS A0 - A16 WE\ Address Inputs Write Enable Chip Enable Output Enable Data Inputs/Outputs Power Ground No Connection GENERAL DESCRIPTION The ASI AS5C1008 is a high speed, low power, 128K by 8-bit ruggedized plastic (COTS) CMOS Static RAM. It is fabricated using high performance, CMOS technology. This highly reliable process coupled with innovative circuit design techniques, yields access times as fast as 15ns (Max) over the military and industrial temperature ranges. When Chip Enable (CE\) is HIGH, the device assumes a standby mode at which the power dissipation can be reduced down to 125mW (max) at CMOS input levels. Easy memory expansion is provided by using asserted LOW CE\ and asserted HIGH CE2, and asserted LOW write enable (WE\) controls both writing and reading of the memory. TheAS5C1008 is pin-compatible with other 128K x 8 SRAM's in the SOJ package. CE\1, CE2 OE\ I/O0 - I/O7 VCC VSS NC For more products and information please visit our web site at www.austinsemiconductor.com *For ceramic versions of this product, please see the MT5C1008 datasheet. AS5C1008 Rev. 3.6 6/05 Austin Semiconductor, Inc. reserves the right to change products or specifications without notice. 1 SRAM S RAM Austin Semiconductor, Inc. ABSOLUTE MAXIMUM RATINGS* Vcc Supply Relative to GND...................................-0.5V to +7.0V Voltage on any pin Relative to GND.........-0.5V to Vcc +7.0V Storage Temperature ............................................-65°C to +150°C Ambient Temperature with Power Applied........-55oC to +125oC Short Circuit Output Current.................................................260oC Power Dissipation...................................................................1.0W AS5C1008 *Stresses greater than those listed under "Absolute Maximum Ratings" 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 operation section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. FUNCTIONAL BLOCK DIAGRAM A0 Address A16 Decoder Memory Matrix I/O0 Data I/O7 Input Data Control Column I/O CE\1 CE2 WE\ OE\ AS5C1008 Rev. 3.6 6/05 Austin Semiconductor, Inc. reserves the right to change products or specifications without notice. 2 SRAM S RAM Austin Semiconductor, Inc. AS5C1008 ELECTRICAL CHARACTERISTICS AND RECOMMENDED DC OPERATING CONDITIONS (-55oC VIL, f = fmax -15 -20 -25 SYMBOL MIN MAX MIN MAX MIN MAX UNITS ICC1 ISB1 180 150 140 mA 90 75 70 mA Vcc=MAX, CE\1 > Vcc -0.2V, or CE2 CMOS Standby Current < 0.2V, VIN > Vcc -0.2V and CMOS Inputs VIN < 0.2V, f = 0 Input Leakage Current Output Leakage Current Output High Voltage Output Low Voltage Input High Voltage Input Low Voltage GND < VIN < Vcc GND < VOUT < Vcc Output Disabled Vcc = MIN, IOH = -4.0 mA Vcc = MIN, IOL = 8.0 mA ISB2 ILI ILO VOH VOL VIH VIL 2.2 -0.5 -10 -10 2.4 10 10 10 mA µA µA V 10 10 -10 -10 2.4 10 10 -10 -10 2.4 10 10 0.4 Vcc +0.5 0.8 0.4 Vcc 2.2 +0.5 -0.5 0.8 2.2 -0.5 0.4 Vcc +0.5 0.8 V V V PIN DESCRIPTIONS A0 - A16: Address Inputs These 17 address inputs select one of the 131,072 8-bit words in the RAM. CE\1: Chip Enable 1 Input CE\1 is asserted LOW to read from or write to the device. If Chip Enable 1 is deasserted, the device is deselected and is in standby power mode. The I/O pins will be in the high-impedance state when the device is deselected. CE2: Chip Enable 2 Input CE2 is asserted HIGH to read from or write to the device. If Chip Enable 2 is deasserted, the device is deselected and is in standby power mode. The I/O pins will be in the high-impedance state when the device is deselected. OE\: Output Enable Input The Output Enable Input is asserted LOW. If asserted LOW while CE\1 is asserted (LOW) and CE2 is asserted (HIGH) and WE\ is deasserted (HIGH), data from the SRAM will be present on the I/O pins. The I/O pins will be in the high-impedance state when OE\ is deasserted. WE\: Write Enable Input The Write Enable input is asserted LOW and controls read and write operations. When CE\1 and WE\ are both asserted (LOW) and CE2 is asserted (HIGH) input data present on the I/O pins will be written into the selected memory location. AS5C1008 Rev. 3.6 6/05 Austin Semiconductor, Inc. reserves the right to change products or specifications without notice. 3 SRAM S RAM Austin Semiconductor, Inc. AS5C1008 ELECTRICAL CHARACTERISTICS AND RECOMMENDED AC OPERATING CONDITIONS (-55oC