M41T315Y_07 Datasheet, PDF (1/30 Pages) STMicroelectronics – Serial access phantom RTC supervisor

M41T315Y
M41T315V, M41T315W
Serial access phantom RTC supervisor
Not For New Design
Features
■ 3.0V, 3.3V, or 5V operating voltage
■ Real-time clock keeps track of
tenths/hundredths of seconds, seconds,
minutes, hours, days, date of the month,
months, and years
■ Automatic leap year correction valid up to 2100
■ Automatic switch-over and deselect circuitry
■ Choice of power-fail deselect voltages:
(V_PFD = power-fail deselect voltage)
– M41T315Y^(a): V_CC = 4.5 to 5.5V
4.25V ≤ V_PFD ≤ 4.50V
– M41T315V: V_CC = 3.0 to 3.6V
2.80V ≤ V_PFD ≤ 2.97V
– M41T315W: V_CC = 2.7 to 3.3V
2.60V ≤ V_PFD ≤ 2.70V
■ No address space required to communicate
with RTC
■ Provides nonvolatile supervisor functions for
battery backup of SRAM
■ Full ±10% V_CC operating range
■ Industrial operating temperature range (–40 to
+85°C)
■ Ultra-low battery supply current of 500nA (max)
■ Optional packaging includes A 28-lead SOIC
and SNAPHAT^® top (to be ordered separately)
■ SNAPHAT package provides direct connection
for a snaphat top, which contains the battery
and crystal
■ RoHS compliant
– Lead-free second level interconnect
16
1
SO16 (MQ)
SNAPHAT (SH)
battery & crystal
28
1
SOH28 (MH)
a. Contact local ST sales office for availability.
November 2007
Rev 3
This is information on a product still in production but not recommended for new designs.
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