M48T35AV

Description

Doc ID 6845 Rev 9

5/29

1

Description

clock. The monolithic chip is available in two special packages to provide a highly integrated

battery-backed memory and real-time clock solution.

The M48T35AV is a non-volatile pin and function equivalent to any JEDEC standard

32 Kb 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.

a long-life lithium button cell in a single package.

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

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 and crystal damage due to the high

temperatures required for device surface-mounting. The SNAPHAT housing is keyed to

prevent reverse insertion.

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

in tape & reel form.

For the 28-lead SOIC, the battery/crystal package part numbers are M4T28-BR12SH1 (48

mAh lithium battery SNAPHAT), M4T32-BR12SH1 (120 mAh lithium battery SNAPHAT),

and M4T32-BR12SH6 (120 mAh lithium battery SNAPHAT, –40 to +85 °C crystal).

Figure 1.

Logic diagram

AI02797B

15

A0-A14

W

DQ0-DQ7

VCC

M48T35AV

G

VSS

8

E