M48T35-70PM1E 데이터 시트보기 (PDF) - STMicroelectronics

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M48T35-70PM1E

5V, 256 Kbit (32 Kb x 8) TIMEKEEPER® SRAM

STMicroelectronics 

M48T35

M48T35Y

5V, 256 Kbit (32 Kb x 8) TIMEKEEPER® SRAM

Features

■ Integrated, ultra low power SRAM, real time

clock, power-fail control circuit and battery

■ BYTEWIDE™ RAM-like clock access

■ BCD coded year, month, day, date, hours,

minutes, and seconds

■ Frequency test output for real time clock

■ Automatic power-fail chip deselect and WRITE

protection

■ WRITE protect voltages

(VPFD = Power-fail Deselect Voltage):

– M48T35: VCC = 4.75 to 5.5V

– 4.5V ≤ VPFD ≤ 4.75V

– M48T35Y: VCC = 4.5 to 5.5V

– 4.2V ≤ VPFD ≤ 4.5V

■ Self-contained battery and crystal in the

CAPHAT™ DIP package

■ SOIC package provides direct connection for a

SNAPHAT® housing containing the battery and

crystal

■ SNAPHAT® housing (battery and crystal) is

replaceable

■ Pin and function compatible with JEDEC

standard 32 Kb x 8 SRAMs

■ RoHS compliant

– Lead-free second level interconnect

28

1

PCDIP28 (PC)

Battery/Crystal

CAPHAT

SNAPHAT (SH)

Battery/Crystal

28

1

SOH28 (MH)

August 2007

Rev 7

1/29

www.st.com

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