M68AR024D datasheet(3/19 Pages) STMICROELECTRONICS

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M68AR024D

SUMMARY DESCRIPTION

The M68AR024D is a 16 Mbit (16,777,216 bit) Low

Power SRAM fabricated in STMicroelectronics ad-

vanced CMOS technology, organized as 1,048,576

words by 16 bits. The device exhibits fully static op-

eration requiring no external clocks or timing

strobes.

It needs 1.65 to 1.95V supply voltage. By using the

VCCQ pin all the outputs can be powered indepen-

dently from the core supply voltage allowing to

drive the I/O pins down to 1.5V. VCCQ pin can be

tied to Vcc if the feature is not required.

This device has a standard Asynchronous SRAM

Interface. Read and Write cycles can be per-

formed on a single byte by using UB/LB signals.

The device can be put into standby mode by using

E1/E2 pins. The same pins can be used to cas-

cade more devices in order to achieve deep mem-

ory expansion.

Standby mode allows a low current consumption,

up to 99%, by reducing internal activities.

The M68AR024D is available in TFBGA48 (0.75

mm pitch) package with industrial standard foot-

print.

Figure 2. Logic Diagram

Table 1. Signal Names

AI05400c

A0-A19

DQ0-DQ15

VCCQ

M68AR024D

VSS

VCC

A0-A19

Address Inputs

DQ0-DQ15

Data Input/Output

E1, E2

Chip Enables

Output Enable

Write Enable

Upper Byte Enable Input

Lower Byte Enable Input

VCC

Supply Voltage

VCCQ

I/O Supply Voltage

VSS

Ground

Not Connected Internally

Don’t Use as Internally Connected

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