Order this document
by MCM67Q909/D
SEMICONDUCTOR TECHNICAL DATA
MCM67Q909
Advance Information
512K x 9 Bit Separate I/O
Synchronous Fast Static RAM
The MCM67Q909 is a 4M–bit static random access memory, organized as
512K words of 9 bits. It features separate TTL input and output buffers, which
drive 3.3 V output levels, and incorporates input and output registers on–board
withhighspeedSRAM. Italsofeaturestransparent–writeanddatapass–through
capabilities.
86 BUMP PBGA
CASE 896A–02
The synchronous design allows for precise cycle control with the use of an
external single clock (K). The addresses (A0 – A18), data input (D0 – D8), data
output (Q0 – Q8), write–enable (W), chip–enable (E), andoutput–enable(G), are
registered on the rising edge of clock (K).
The control pins (E, W, G) function differently in comparison to most synchro-
nous SRAMs. This device will not deselect with E high. The RAM remains active
at all times. If E is registered high, the output pins (Q0 – Q8) will be driven if G
is registered low. The transparent write feature allows the output data to track the
input data. E, G, and W must be asserted to perform a transparent write (write
and pass–through). The input data is available at the ouputs on the next rising
edge of clock (K).
The pass–through function is always enabled. E high disables the write to the
array while allowing a pass–through cycle to occur on the next rising edge of
clock (K). Only a registered G high will three–state the outputs.
The MCM67Q909 is available in an 86–bump surface mount PBGA (Plastic
Ball Grid Array) package.
PIN NAMES
A0 – A18 . . . . . . . . . . . . . . . . . Address Input
E . . . . . . . . . . . . . . . . . . . . . . . . . Chip Enable
W . . . . . . . . . . . . . . . . . . . . . . . . Write Enable
G . . . . . . . . . . . . . . . . . . . . . . Output Enable
D0 – D8 . . . . . . . . . . . . . . . . . . . . Data Inputs
Q0 – Q8 . . . . . . . . . . . . . . . . . . Data Outputs
K . . . . . . . . . . . . . . . . . . . . . . . . . . Clock Input
SCK . . . . . . . . . . . . . . . . . . Scan Clock Input
SE . . . . . . . . . . . . . . . . . . . . . . . Scan Enable
SDI . . . . . . . . . . . . . . . . . . . . Scan Data Input
SDO . . . . . . . . . . . . . . . . . Scan Data Output
V
CC
V
SS
. . . . . . . . . . . . . . . + 5 V Power Supply
. . . . . . . . . . . . . . . . . . . . . . . . . . Ground
NC . . . . . . . . . . . . . . . . . . . . . No Connection
•
•
•
•
•
•
•
•
•
•
•
•
Single 5 V ± 5% Power Supply
Fast Cycle Time: 12 ns Max
Single Clock Operation
PIN ASSIGNMENT
4
5
6
7
8
9
1
2
3
TTL Input and Output Levels (Outputs LVTTL Compatible)
Address, Data Input, E, W, and G Registers On–Chip
83 MHz Maximum Clock Cycle Time
Self–Timed Write
Separate Data Input and Output Pins
Transparent–Write and Pass–Through
High Output Drive Capability: 50 pF/Output at Rated Access Time
Boundary Scan Implementation
A
B
E
W
G
V
SDI SDO A4
A6 A2
A0
CC
A16 A14
D7
K
V
V
D8
SS
SS
C
D
E
F
A15 A17
Q7
V
V
V
V
Q8
Q6
V
SS
SS
SS
SS
SS
V
V
V
V
V
V
V
D6
SS
SS
SS SS
SS
SS
D5
V
V
V
V
V
V
V
V
CC
SS
SS
SS
SS
SS
SS
SS
PBGA Package for High Speed Operation
V
Q5
V
V
V
V
D4 Q4
CC
SS
SS
SS
SS SS
SS
SS
SS
G
D3
Q3
D1
V
V
V
V
SS
V
V
D2
D0
Q2
SS
SS
H
V
A18
V
V
V
V
SS
SS
SS SS
SS
J
Q1 A12 A10
V
A9
A8
SE
A5
A7
A1
A3
Q0
SS
K
A13 A11 SCK
V
CC
TOP VIEW
86–BUMP
Not to Scale
This document contains information on a new product. Specifications and information herein are subject to change without notice.
REV 3
12/23/97
Motorola, Inc. 1997
MOTOROLA FAST SRAM
MCM67Q909
1