Document
3.3V CMOS STATIC RAM 4 MEG (1M x 4-BIT)
Integrated Device Technology, Inc.
ADVANCE INFORMATION IDT71V428
FEATURES:
• 1M x 4 advanced high-speed CMOS Static RAM • JEDEC Center Power / GND pinout for reduced noise • Equal access and cycle times — 12/15/20ns • Single 3.3V power supply • One Chip Select plus one Output Enable pin • Bidirectional data inputs and outputs directly TTL-compatible • Low power consumption via chip deselect • Available in 32-pin, 400 mil plastic SOJ package
DESCRIPTION:
The IDT71V428 is a 4,194,304-bit high-speed Static RAM organized as 1M x 4. It is fabricated using IDT’s highperfomance, high-reliability CMOS technology. This state-ofthe-art technology, combined with innovative circuit design techniques, provides a cost-effective solution for high-speed memory needs. The IDT71V428 has an output enable pin which operates as fast as 6ns, with address access times as fast as 12ns. All bidirectional inputs and outputs of the IDT71V428 are TTLcompatible and operation is from a single 3.3V supply. Fully static asynchronous circuitry is used, requiring no clocks or refresh for operation. The IDT71V428 is packaged in a 32-pin, 400mil Plastic SOJ.
FUNCTIONAL BLOCK DIAGRAM
A0
• • •
A19
ADDRESS DECODER
• • •
4,194,304-BIT MEMORY ARRAY
I/O0 – I/O3
4
¥
I/O CONTROL
4
4
WE# OE# CS#
CONTROL LOGIC
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The IDT logo is a registered trademark of Integrated Device Technology, Inc.
COMMERCIAL TEMPERATURE RANGE
©1996 Integrated Device Technology, Inc.
JULY 1996
3623/-
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IDT71V428 3.3V CMOS STATIC RAM 4 MEG (1M x 4-BIT)
COMMERCIAL TEMPERATURE RANGE
PIN CONFIGURATION
PIN DESCRIPTION
A0 – A19
A18 A3 A2 A1 A0
CE
I/O 0 V DD VSS I/O 1
WE
A17 A16 A15 A14 A19
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
SO32-3
32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17
A4 A5 A6 A7 A8
CS WE OE
Address Inputs Chip Select Write Enable Output Enable Data Input/Output 3.3V Power Ground
Input Input Input Input I/O Power Gnd
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I/O0 - I/O3 VDD VSS
OE
I/O 3 VSS V DD I/O 2 A9 A10 A11 A12 A13 NC
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SOJ TOP VIEW
ORDERING INFORMATION
IDT 71V428 Device Type
S Power
XX Speed
XXX Package
Y
400-mil SOJ (S032-3)
12 15 20
Speed in nanoseconds
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