RAD Tolerant
ACT–RS128K32 High Speed
4 Megabit SRAM Multichip Module
Preliminary
Features
■ 4 Low Power CMOS 128K x 8 SRAMs in one MCM
■ Overall configuration as 128K x 32
■ Tolerant to 30KRad (Si)
CIRCUIT TECHNOLOGY
2
www.aeroflex.com/act1.htm
■ Latch-up Immunity to 112MeV/(mg/cm )
■ Input and Output TTL Compatible
■ 35 & 45ns Access Times
■ Full Military (-55°C to +125°C) Temperature Range
■ For Class K devices per MIL-PRF-38534 - Consult Factory
■ +5V Power Supply
General Description
■ Choice of 4 Hermetically sealed Co-fired Packages:
● 68–Lead, Low Profile CQFP (F1), 1.56"SQ x .140"max
● 68–Lead, Dual-Cavity CQFP (F2), .88"SQ x .20"max (.18"max thickness
available, contact factory for details) (Drops into the 68 Lead JEDEC .99"SQ
CQFJ footprint)
The ACT–RS128K32 is a High
Speed 4 megabit CMOS SRAM
Multichip
Module
(MCM)
designed for full temperature
range, military, space, or high
reliability mass memory and
fast cache applications.
● 66–Lead, PGA-Type (P1), 1.385"SQ x .245"max
■ Internal Decoupling Capacitors
The MCM can be organized
as a 128K x 32 bits, 256K x 16
bits or 512k x 8 bits device and
is input and output TTL
compatible. Writing is executed
when the write enable (WE)
and chip enable (CE) inputs are
low. Reading is accomplished
when WE is high and CE and
output enable (OE) are both
low. Access time grades of
35ns and 45ns maximum are
standard.
Block Diagram – PGA Type Package(P1) & CQFP(F2)
Pin Description
WE1 CE1 WE2 CE2 WE3 CE3 WE4 CE4
I/O0-31
Data I/O
A0–16 Address Inputs
WE1–4 Write Enables
CE1–4 Chip Enables
A0 – A16
OE
128Kx8
128Kx8
128Kx8
128Kx8
OE
Vcc
GND
NC
Output Enable
Power Supply
Ground
8
8
8
8
Not Connected
The +5 Volt power supply
version is standard.
I/O0-7
I/O8-15
I/O16-23
I/O24-31
Block Diagram – CQFP(F1)
The products are designed for
operation over the temperature
range of -55°C to +125°C and
screened under the full military
environment. DESC Standard
Military Drawing (SMD) part
numbers are pending.
Pin Description
I/O0-31
Data I/O
CE1
CE2
CE3
CE4
WE
OE
A0 – A16
A0–16 Address Inputs
WE
Write Enable
CE1–4 Chip Enables
128Kx8
128Kx8
128Kx8
128Kx8
The
ACT-RS128K32
is
OE
Vcc
GND
NC
Output Enable
Power Supply
Ground
manufactured in Aeroflex’s
2
80,000ft
certified facility in Plainview,
N.Y.
MIL-PRF-38534
8
8
8
8
Not Connected
I/O0-7
I/O8-15
I/O16-23
I/O24-31
eroflex Circuit Technology - Advanced Multichip Modules © SCD3659 REV 3 12/17/98