DocID025389 Rev 2

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M41T01

DC and AC parameters

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

Table 6. DC characteristics

Symbol

Parameter

Min

Typ

Max

Unit

Input leakage current

0 V

±1

μA

Output leakage current

0 V

±1

μA

Supply current

Switch frequency = 100 kHz

300

μA

Supply current (standby)

70

μA

Input low voltage

–0.3

V

Input high voltage

V

Output low voltage

0.4

V

Pull-up supply voltage

(open drain)

FT/OUT

5.5

V

Battery supply voltage

3

V

Battery supply current

0.8

1

μA

Table 7. Crystal electrical characteristics

Symbol

Min

Typ

Max

Unit

Resonant frequency

32.768

kHz

Series resistance

60

k



Load capacitance

12.5

pF

1. These values are externally supplied. 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.

2. Load capacitors are integrated within the M41T01. 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.