DocID10772 Rev 7

19/28

M41T00S

DC and AC parameters

Table 8. DC characteristics

Sym

Parameter

Test condition(1)

Min

Typ

Max

Unit

ILI

Input leakage current

0 V

≤ V

IN ≤ VCC

±1

µA

ILO

Output leakage current

0 V

≤ V

OUT ≤ VCC

±1

µA

ICC1

Supply current

Switch freq = 400 kHz

300

µA

ICC2

Supply current (standby)

SCL = 0 Hz

All Inputs

≥ V

CC – 0.2 V

≤ V

SS + 0.2 V

70

µA

VIL

Input low voltage

–0.3

0.3VCC

V

VIH

Input high voltage

0.7VCC

VCC + 0.3

V

VOL

Output low voltage

IOL = 3.0 mA

0.4

V

Output low voltage (open drain)(2)

IOL = 10 mA

0.4

V

Pull-up supply voltage (open drain)

FT/OUT

5.5

V

VBAT

(3) Backup supply voltage

2.0

3.5(4)

V

IBAT

Battery supply current

TA = 25 °C, VCC = 0 V

Oscillator ON, VBAT = 3 V

0.6

1

µA

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

2. For FT/OUT pin (open drain).

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

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

Table 9. Crystal electrical characteristics

Sym

Parameter(1)(2)

Min

Typ

Max

Unit

fO

Resonant frequency

32.768

kHz

RS

Series resistance

60(3)

k

Ω

CL

Load capacitance

12.5

pF

1. 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.

2. 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.

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