M48Z35, M48Z35Y

Description

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Description

power-fail deselect circuitry and battery control logic on a single die. The monolithic chip is

available in two special packages to provide a highly integrated battery backed-up memory

solution.

The M48Z35/Y is a non-volatile pin and function equivalent to any JEDEC standard 32K x 8

SRAM. It also easily fits into many ROM, EPROM, and EEPROM sockets, providing the

non-volatility of PROMs without any requirement for special WRITE timing or limitations on

the number of WRITEs that can be performed. The 28-pin 600mil DIP CAPHAT™ houses

the M48Z35/Y silicon with a long life lithium button cell in a single package.

The 28-pin 330mil SOIC provides sockets with gold plated contacts at both ends for direct

connection to a separate SNAPHAT housing containing the battery. The unique design

allows the SNAPHAT battery package to be mounted on top of the SOIC package after the

completion of the surface mount process. Insertion of the SNAPHAT housing after reflow

prevents potential battery damage due to the high temperatures required for device surface-

mounting. The SNAPHAT housing is keyed to prevent reverse insertion.

The SOIC and battery packages are shipped separately in plastic anti-static tubes or in Tape

& Reel form.

For the 28-lead SOIC, the battery package (i.e. SNAPHAT) part number is “M4Z28-

BR00SH1.”

Figure 1.

Logic diagram

AI01616D

15

A0-A14

W

DQ0-DQ7

VCC

M48Z35

M48Z35Y

G

VSS

8

E