M41T315V-85MH6E Datasheet M41T315V-85MH6E, M41T315V-85MH6F | P1-P3

Not For New Design

This is information on a product still in production but not recommended for new designs.

November 2007 Rev 3 1/30

M41T315Y

M41T315V, M41T315W

Serial access phantom RTC supervisor

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:

PFD

= power-fail deselect voltage)

–M41T315Y

(a)

: V

= 4.5 to 5.5V

4.25V ≤ V

PFD

≤ 4.50V

–M41T315V: V

= 3.0 to 3.6V

2.80V ≤ V

PFD

≤ 2.97V

–M41T315W: V

= 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

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

a. Contact local ST sales office for availability.

SO16 (MQ)

SNAPHAT (SH)

battery & crystal

SOH28 (MH)

www.st.com

Contents M41T315Y, M41T315V, M41T315W

2/30

Contents

1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.1 Non-volatile supervisor operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.2 Data retention . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3 Clock operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

3.1 Clock register information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

3.2 AM-PM/12/24 mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

3.3 Oscillator and reset bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

3.4 Zero bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

4 Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

5 DC and AC parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

6 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

7 Part numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

M41T315Y, M41T315V, M41T315W List of tables

3/30

List of tables

Table 1. Signal names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Table 2. Operating modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Table 3. AC electrical characteristics (M41T315Y). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Table 4. AC electrical characteristics (M41T315V/W) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Table 5. RTC register map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Table 6. Ablolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Table 7. DC and AC measurement conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Table 8. Capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Table 9. DC characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Table 10. Crystal electrical characteristics (externally supplied) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Table 11. Power down/up trip points DC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Table 12. SO16 - 16-lead plastic small outline (150 mils body width), package mechanical data . . . 23

Table 13. SOH28 - 28-lead plastic small outline, package mechanical data . . . . . . . . . . . . . . . . . . . 24

Table 14. SH - 4-pin SNAPHAT housing for 48mAh battery and crystal, package mechanical data . 25

Table 15. SH - 4-pin SNAPHAT housing for 120mAh battery and crystal, package mechanical data 26

Table 16. Ordering information scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Table 17. SNAPHAT battery table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Table 18. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P18 P19-P21 P22-P24 P25-P27 P28-P30

M41T315V-85MH6E

Mfr. #:

Buy M41T315V-85MH6E

Manufacturer:

STMicroelectronics

Description:

Real Time Clock Serial Access 85ns

Lifecycle:

New from this manufacturer.

Delivery:

DHL FedEx Ups TNT EMS

Payment:

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M41T315V-85MH6E

M41T315V-85MH6E

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