M41T00S datasheet(19/26 Pages) STMICROELECTRONICS

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M41T00S

DC and AC parameters

19/26

Table 7.

DC characteristics

Table 8.

Crystal electrical characteristics

Figure 13.

Power down/up mode AC waveforms

Sym

Parameter

Test condition(1)

Valid for ambient operating temperature: TA = –40 to 85°C; VCC = 2.7 to 5.5 V (except where noted).

Min

Typ

Max

Unit

ILI

Input leakage current

≤ VIN ≤ VCC

±1

μA

ILO

Output leakage current

≤ VOUT ≤ VCC

±1

μA

ICC1

Supply current

Switch freq = 400 kHz

300

μA

ICC2

Supply current (standby)

SCL = 0Hz

All Inputs

≥ VCC – 0.2 V

≤ VSS + 0.2 V

μA

VIL

Input low voltage

–0.3

0.3VCC

VIH

Input high voltage

0.7VCC

VCC + 0.3

VOL

Output low voltage

IOL = 3.0mA

0.4

Output low voltage (open drain)(2)

For FT/OUT pin (open drain).

IOL = 10mA

0.4

Pull-up supply voltage (open drain)

FT/OUT

5.5

VBAT

(3)

STMicroelectronics recommends the RAYOVAC BR1225 or BR1632 (or equivalent) as the battery supply.

Backup supply voltage

2.0

3.5(4)

For rechargeable backup, VBAT (max) may be considered to be VCC.

IBAT

Battery supply current

TA = 25°C, VCC = 0 V

Oscillator ON, VBAT = 3 V

0.6

µA

Sym

Parameter(1)(2)

Externally supplied if using the SO8 package. STMicroelectronics recommends the KDS DT-38: 1TA/1TC252E127, Tuning

Fork Type (thru-hole) or the DMX-26S: 1TJS125FH2A212, (SMD) quartz crystal for industrial temperature operations. KDS

can be contacted at kouhou@kdsj.co.jp or http://www.kdsj.co.jp for further information on this crystal type.

Load capacitors are integrated within the M41T00S. Circuit board layout considerations for the 32.768 kHz crystal of

minimum trace lengths and isolation from RF generating signals should be taken into account.

Min

Typ

Max

Units

Resonant frequency

32.768

kHz

Series resistance

60(3)

For applications requiring backup supply operation below 2.5 V, RS (max) should be considered 40 kΩ.

Load capacitance

12.5

AI00596

VCC

trec

tPD

VSO

SDA

SCL

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