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SEMICONDUCTOR
TECHNICAL DATA
MCM64100
Product Preview
1M x 64 Bit Dynamic Random
Access Memory Module
The MCM64100 is a dynamic random access memory (DRAM) module organized
as 1,048,576 x 64 bits. The module is a JEDEC-standard 168-lead dual-in-line
memory module (DIMM) with 84 separate contacts per side, consisting of sixteen
MCM54400A DRAMs housed in 300-mil thin small outline packages (TSOP),
mounted on a substrate along with a 0.22 µF (min) decoupling capacitor mounted
adjacent to each DRAM. Buffering is provided for address and all clock pins except
RAS. The MCM54400A is a CMOS high speed dynamic random access memory
organized as 1,048,576 four-bit words and fabricated with CMOS silicon-gate pro-
cess technology.
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Three-State Data Output
Early-Write Common I/O Capability
Fast Page Mode Capability
TTL-Compatible Inputs and Outputs
RAS-Only Refresh
CAS Before RAS Refresh
Hidden Refresh
2048 Cycle Refresh: 16 ms (Max)
Consists of Sixteen 1M x 4 DRAMs, Sixteen 0.22 µF (Min) Decoupling Capacitors,
and Two 20-Bit Buffers
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Unlatched Data Out at Cycle End Allows Two Dimensional Chip Selection
Presence Detect Enable (PDE) Controls Access to 8 Bits of Buffered PD
Information
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Notch Keys Prevent Accidental Insertion in Low Voltage (3.3 V) Systems
Fast Access Time (t
RAC
): MCM64100-60 = 60 ns (Max)
MCM64100-70 = 70 ns (Max)
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Low Active Power Dissipation: MCM64100-60 = 10.89 W (Max)
MCM64100-70 = 9.13 W (Max)
Low Standby Power Dissipation: TTL Levels = 193 mW (Max)
CMOS Levels = 105 mW (Max)
PIN NAMES
A0, B0, A1 – A9 . . . . . . . . . Address Inputs
CAS0 – CAS7 . . Column Address Strobe
WE0, WE2 . . . . . . . . . . . . . . . Write Enable
PD1 – PD8 . . . Buffered Presence Detect
PDE . . . . Presence Detect Output Enable
DQ0 – DQ70* . . . . . . . . Data Input/Output
RAS0, RAS2 . . . . . . Row Address Strobe
OE0, OE2 . . . . . . . . . . . . . . Output Enable
ID0, ID1 . . . . . . . . . . . . . Unbuffered ID Bit
V
. . . . . . . . . . . . . . . . . . . Power (+ 5 V)
CC
NC . . . . . . . . . . . . . . . . . . . No Connection
V
SS
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*DQ8, DQ17, DQ26, DQ35, DQ44, DQ53, and DQ62 are not present on 64 bit modules.
This document contains information on a new product under development. Motorola reserves the right to change or discontinue this product without notice.
3/94
Motorola, Inc. 1994
MOTOROLA DRAM
MCM64100
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