DC and AC parameters

M41T11

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Table 6.

Capacitance

Symbol

1.

Effective capacitance measured with power supply at 5V; sampled only, not 100% tested.

2.

At 25°C, f = 1MHz.

Min

Max

Unit

Input capacitance (SCL)

7

pF

(3)

3.

Outputs deselected.

Output capacitance (SDA, FT/OUT)

10

pF

Low-pass filter input time constant (SDA and SCL)

250

1000

ns

Table 7.

DC characteristics

Symbol

Parameter

1.

Min

Typ

Max

Unit

Input leakage current

0V

≤V

±1

µA

Output leakage current

0V

≤V

±1

µA

Supply current

Switch frequency = 100kHz

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

(2)

2.

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

Battery supply voltage

3.

4.

V

Battery supply current

0.8

1

µA

Table 8.

Crystal electrical characteristics

Symbol

1.

These values are 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 M41T11. Circuit board layout considerations for the 32.768kHz

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

3.

All SNAPHAT

Min

Typ

Max

Unit

Resonant frequency

32.768

kHz

Series resistance

60

k

Ω

Load capacitance

12.5

pF