MCM321024 Datasheet, PDF (1/8 Pages) Motorola, Inc – 1M x 32 Bit Fast Static RAM Module

MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Advance Information
1M x 32 Bit
Fast Static RAM Module
The MCM321024 is an 32M bit static random access memory module orga-
nized as 1,048,576 words of 32 bits. The module is a 72–lead single in–line
memory module (SIMM) consisting of eight MCM6249 fast static RAMs pack-
aged in 32–lead SOJ packages and mounted on a printed circuit board along with
sixteen decoupling capacitors.
The MCM6249 is a high performance CMOS fast static RAM organized as
1,048,576 words of 4 bits. Static design eliminates the need for external clocks
or timing strobes, while CMOS circuitry reduces power consumption and pro-
vides for greater reliability.
The MCM321024 is equipped with output enable (G) and four separate byte
enable (E1 – E4) inputs, allowing for greater system flexibility. The G input, when
high, will force the outputs to high impedance. Ex high will do the same for byte x.
PD0 – PD3 are reserved for density identification. PD0 and PD2 are connected
to ground. These pins can be used to identify the density of the memory module.
• Single 5 V ± 10% Power Supply
• Fast Access Time: 20/25 ns
• Three–State Outputs
• Fully TTL Compatible
• JEDEC Standard Pinout
• Power Requirement: 1520/1400 mA Maximum, Active AC
• High Board Density SIMM Package
• Byte Operation: Four Separate Chip Enables, One for Each Byte (Eight Bits)
• High Quality Six–Layer FR4 PWB with Separate Internal Power and
Ground Planes
• Incorporates Motorola’s State–of–the–Art Fast Static RAMs
PIN NAMES
A0 – A19 . . . . . . . . . . . . . . . . . . . . . . . . . . . Address Inputs
W . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Write Enable
G . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Output Enable
E1 – E4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Byte Enables
DQ0 – DQ31 . . . . . . . . . . . . . . . . . . . . . . Data Input/Output
VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . + 5 V Power Supply
VSS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ground
PD0 – PD3 . . . . . . . . . . . . . . . . . . . . . . . . Package Density
NC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No Connect
For proper operation of the device, VSS must be connected
to ground.
Order this document
by MCM321024/D
MCM321024
PIN ASSIGNMENT
TOP VIEW
72 LEAD SIMM — CASE TBD
NC ²
PD3 4
PD0 ⁶
DQ0 ⁸
DQ1 ¹⁰
DQ2 ¹²
DQ3 14
VCC ¹⁶
A7 ¹⁸
A8 20
A9 22
DQ4 24
DQ5 26
DQ6 28
DQ7 ₃₀
W ₃₂
A14 ₃₄
E1 ₃₆
1 NC
3 _PD2
5 VSS
7 PD1
9 DQ8
11 DQ9
13 DQ10
15 DQ11
17 A0
19 A1
21 A2
23 DQ12
25 DQ13
27 DQ14
29 DQ15
31 VSS
33 A15
35 E2
E3 38
A16 40
VSS 42
DQ16 44
DQ17 46
DQ18 48
DQ19 50
A10 52
A11 54
A12 56
A13 58
DQ20 60
DQ21 62
DQ22 64
DQ23 66
VSS 68
A19 70
NC 72
37 E4
39 A17
41 G
43 DQ24
45 DQ25
47 DQ26
49 DQ27
51 A3
53 A4
55 A5
57 VCC
59 A6
61 DQ28
63 DQ29
65 DQ30
67 DQ31
69 A18
71 NC
This document contains information on a new product. Specifications and information herein are subject to change without notice.
REV 1
11/15/96
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MCM321024
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