STMicroelectronics M41T56
512 bit 64b x8 Serial Access TIMEKEEPER SRAM
ELECTRICAL CHARACTERISTICS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Power down/up mode AC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Power down/up trip points DC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 SO8N – 8-pin plastic small outline, package mechanical data . . . . . . . . . . . . . . . . . . . . . . 22 SOH28 – 28-lead plastic small outline, 4-socket battery SNAP