IS61LV25616AL 256K x 16 HIGH SPEED ASYNCHRONOUS CMOS STATIC RAM WITH 3.3V SUPPLY DECEMBER 2011 DESCRIPTION FEATURES The ISSI IS61LV25616AL is a high-speed, 4,194,304-bit High-speed access time: static RAM organized as 262,144 words by 16 bits. It is 10, 12 ns fabricated using ISSI s high-performance CMOS technol- CMOS low power operation ogy. This highly reliable process coupled with innovative circuit design techniques, yields high-performance and low Low stand-by power: power consumption devices. Less than 5 m A (typ.) CMOS stand-by TTL compatible interface levels When CE is HIGH (deselected), the device assumes a Single 3.3V power supply standby mode at which the power dissipation can be re- duced down with CMOS input levels. Fully static operation: no clock or refresh required Easy memory expansion is provided by using Chip Enable Three state outputs and Output Enable inputs, CE and OE. The active LOW Data control for upper and lower bytes Write Enable (WE) controls both writing and reading of the memory. A data byte allows Upper Byte (UB) and Lower Industrial temperature available Byte (LB) access. Lead-free available The IS61LV25616AL is packaged in the JEDEC standard 44-pin 400-mil SOJ, 44-pin TSOP Type II, 44-pin LQFP and 48-pin Mini BGA (8mm x 10mm). FUNCTIONAL BLOCK DIAGRAM 256K x 16 A0-A17 DECODER MEMORY ARRAY VDD GND I/O0-I/O7 I/O Lower Byte COLUMN I/O DATA CIRCUIT I/O8-I/O15 Upper Byte CE OE CONTROL WE CIRCUIT UB LB Copyright 2011 Integrated Silicon Solution, Inc. All rights reserved. ISSI reserves the right to make changes to this specification and its products at any time without notice. ISSI assumes no liability arising out of the application or use of any information, products or services described herein. Customers are advised to obtain the lat- est version of this device specification before relying on any published information and before placing orders for products. Integrated Silicon Solution, Inc. does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reason- ably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless Integrated Silicon Solution, Inc. receives written assurance to its satisfaction, that: a.) the risk of injury or damage has been minimized b.) the user assume all such risks and c.) potential liability of Integrated Silicon Solution, Inc is adequately protected under the circumstances Integrated Silicon Solution, Inc. www.issi.com 1-800-379-4774 1 Rev. F 12/15/2011IS61LV25616AL TRUTH TABLE I/O PIN Mode WE CE OE LB UB I/O0-I/O7 I/O8-I/O15 VDD Current Not Selected X H X X X High-Z High-Z Isb 1, Isb 2 Output Disabled H L H X X High-Z High-Z Icc X L X H H High-Z High-Z Read H L L L H Dout High-Z Icc H L L H L High-Z Dout H L L L L Dout Dout Write L L X L H DIn High-Z Icc L L X H L High-Z DIn L L X L L DIn DIn PIN CONFIGURATIONS PIN DESCRIPTIONS A0-A17 Address Inputs 44-Pin TSOP (Type II) and SOJ I/O0-I/O15 Data Inputs/Outputs CE Chip Enable Input OE Output Enable Input A0 1 44 A17 WE Write Enable Input A1 2 43 A16 A2 3 42 A15 LB Lower-byte Control (I/O0-I/O7) A3 4 41 OE UB Upper-byte Control (I/O8-I/O15) 40 UB A4 5 CE 6 39 LB NC No Connection I/O0 7 38 I/O15 VDD Power I/O1 8 37 I/O14 I/O2 9 36 I/O13 GND Ground I/O3 10 35 I/O12 VDD 11 34 GND GND 12 33 VDD I/O4 13 32 I/O11 I/O5 14 31 I/O10 I/O6 15 30 I/O9 I/O7 16 29 I/O8 WE 17 28 NC A5 18 27 A14 A6 19 26 A13 A7 20 25 A12 A8 21 24 A11 A9 22 23 A10 2 Integrated Silicon Solution, Inc. www.issi.com 1-800-379-4774 Rev. F 12/15/2011