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M48T08Y

STMicroelectronics
Part Number M48T08Y
Manufacturer STMicroelectronics
Description 64 Kbit 8Kb x 8 TIMEKEEPER SRAM
Published Jul 14, 2016
Detailed Description M48T08 M48T08Y, M48T18 5 V, 64 Kbit (8 Kb x 8) TIMEKEEPER® SRAM Features ■ Integrated ultra low power SRAM, real-time c...
Datasheet PDF File M48T08Y PDF File

M48T08Y
M48T08Y


Overview
M48T08 M48T08Y, M48T18 5 V, 64 Kbit (8 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 ■ Typical clock accuracy of ±1 minute a month, at 25 °C ■ Automatic power-fail chip deselect and WRITE protection ■ WRITE protect VPFD = power-fail deselect voltage): – M48T08: VCC = 4.
75 to 5.
5 V; 4.
5 V ≤ VPFD ≤ 4.
75 V – M48T18/T08Y: VCC = 4.
5 to 5.
5 V; 4.
2 V ≤ VPFD ≤ 4.
5 V ■ Software controlled clock calibration for high accuracy applications ■ Self-contained battery and crystal in the CAPHAT™ DIP package ■ Packaging includes a 28-lead SOIC and SNAPHAT® top (to be ordered separately) ■ SOIC package provides direct connection for a snaphat top which contains the battery and crystal ■ Pin and function compatible with DS1643 and JEDEC standard 8 K x 8 SRAMs ■ RoHS compliant – Lead-free second level interconnect 28 1 PCDIP28 battery/crystal CAPHAT™ SNAPHAT® battery/crystal 28 1 SOH28 June 2011 Doc ID 2411 Rev 11 1/31 www.
st.
com 1 Contents Contents M48T08, M48T08Y, M48T18 1 Description .
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5 2 Operation modes .
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8 2.
1 READ mode .
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9 2.
2 WRITE mode .
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10 2.
3 Data retention mode .
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13 2.
4 Power-fail interrupt pin .
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13 3 Clock operations .
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14 3.
1 Reading the clock .
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