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M5M5W816TP-55HI

8388608-BIT (524288-WORD BY 16-BIT) CMOS STATIC RAM

Renesas Electronics 

2002.08.30 Ver. 6.1

M5M5W816TP - 55HI, 70HI, 85HI

MITSUBISHI LSIs

8388608-BIT (524288-WORD BY 16-BIT) CMOS STATIC RAM

FUNCTION

The M5M5W816TP is organized as 524288-words by 16-

bit. These dev ices operate on a single +2.7~3.6V power

supply , and are directly TTL compatible to both input and

output. Its f ully static circuit needs no clocks and no

ref resh, and makes it usef ul.

The operation mode are determined by a combination of

the dev ice control inputs BC1# , BC2# , S# , W# and

OE#. Each mode is summarized in the f unction table.

A write operation is executed whenev er the low lev el W#

ov erlaps with the low lev el BC1# and/or BC2# and the low

lev el S#. The address(A0~A18) must be set up bef ore the

write cy c le and must be stable during the entire cy c le.

A read operation is executed by s etting W# at a high

lev el and OE# at a low lev el while BC1# and/or BC2# and

S# are in an activ e state(S#=L).

When setting BC1# at the high lev el and other pins are

in an activ e stage , upper-by t e are in a selectable mode in

which both reading and writing are enabled, and lower-byte

are in a non-selectable mode. And when setting BC2# at a

high lev el and other pins are in an activ e stage, lower-

by t e are in a selectable mode and upper-by te are in a

non-selectable mode.

BLOCK DIAGRAM

When setting BC1# and BC2# at a high lev el or S# at a high

lev el, the chips are in a non-selectable mode in which both

reading and writing are disabled. In this mode, the output

stage is in a high-impedance state, allowing OR-tie with other

chips and memory expansion by BC1#, BC2# and S#.

The power supply c urrent is reduced as low as 0.1µA(25°C,

ty pical), and the memory data can be held at +2.0V power

supply , enabling battery back-up operation during power

f ailure or power-down operation in the non-selected mode.

FUNCTION TABLE

S# BC1# BC2# W# OE# Mode DQ1~8 DQ9~16 Icc

H X X X X Non selection High-Z High-Z Standby

X H H X X Non selection High-Z High-Z Standby

L L H L X Write Din High-Z Activ e

L L H H L Read Dout High-Z Activ e

L LHHH

High-Z High-Z Activ e

L H L L X Write High-Z Din Activ e

L H L H L Read High-Z Dout Activ e

L HL HH

High-Z High-Z Activ e

L L L L X Write Din Din Activ e

L L L H L Read Dout Dout Activ e

L L L HH

High-Z High-Z Activ e

(note) "H" and "L" in this table mean VIH or VIL, respectiv ely .

"X" in this table should be "H"or "L".

A0

DQ

1

A1

MEMORY ARRAY

DQ

8

524288 WORDS

x 16 BITS

A17

-

DQ

9

A18

CLOCK

GENERATOR

S#

DQ

16

BC1#

BC2#

W#

OE#

Vcc

GND

2

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