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IS42S16400B1

ISSI
Part Number IS42S16400B1
Manufacturer ISSI
Description 1 Meg Bits x 16 Bits x 4 Banks (64-MBIT) SYNCHRONOUS DYNAMIC RAM
Published Oct 26, 2005
Detailed Description IS42S16400B1 1 Meg Bits x 16 Bits x 4 Banks (64-MBIT) SYNCHRONOUS DYNAMIC RAM FEATURES • Clock frequency: 133 MHz • Full...
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IS42S16400B1
IS42S16400B1

Overview
IS42S16400B1 1 Meg Bits x 16 Bits x 4 Banks (64-MBIT) SYNCHRONOUS DYNAMIC RAM FEATURES • Clock frequency: 133 MHz • Fully synchronous; all signals referenced to a positive clock edge • Internal bank for hiding row access/precharge • Single 3.
3V power supply • LVTTL interface • Programmable burst length – (1, 2, 4, 8, full page) • Programmable burst sequence: Sequential/Interleave • Self refresh modes • 4096 refresh cycles every 64 ms • Random column address every clock cycle • Programmable CAS latency (2, 3 clocks) • Burst read/write and burst read/single write operations capability • Burst termination by burst stop and precharge command • Byte controlled by LDQM and UDQM • Package: 400-mil 54-pin TSOP II ISSI DECEMBER 2003 ® OVERVIEW ISSI's 64Mb Synchronous DRAM IS42S16400B1 is organized as 1,048,576 bits x 16-bit x 4-bank for improved performance.
The synchronous DRAMs achieve high-speed data transfer using pipeline architecture.
All inputs and outputs signals refer to the rising edge of the clock input.
PIN CONFIGURATIONS 54-Pin TSOP (Type II) VDD DQ0 VDDQ DQ1 DQ2 GNDQ DQ3 DQ4 VDDQ DQ5 DQ6 GNDQ DQ7 VDD LDQM WE CAS RAS CS BA0 BA1 A10 A0 A1 A2 A3 VDD 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 GND DQ15 GNDQ DQ14 DQ13 VDDQ DQ12 DQ11 GNDQ DQ10 DQ9 VDDQ DQ8 GND NC UDQM CLK CKE NC A11 A9 A8 A7 A6 A5 A4 GND PIN DESCRIPTIONS A0-A11 BA0, BA1 DQ0 to DQ15 CLK CKE CS RAS CAS Address Input Bank Select Address Data I/O System Clock Input Clock Enable Chip Select Row Address Strobe Command Column Address Strobe Command WE LDQM UDQM VDD GND VDDQ GNDQ NC Write Enable Lower Bye, Input/Output Mask Upper Bye, Input/Output Mask Power Ground Power Supply for DQ Pin Ground for DQ Pin No Connection Copyright © 2003 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.
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