M41T62 datasheet(24/42 Pages) STMICROELECTRONICS

24 / 42 page

Table 12. Capacitance

Symbol

Parameter (1) (2)

Min.

Max.

Unit

CIN

Input capacitance

COUT (3)

Output capacitance

tLP

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

1. At 25°C, f = 1 MHz.

2. Effective capacitance measured with power supply at 3.6 V; sampled only, not 100% tested.

3. Outputs deselected.

Table 13. DC characteristics

Sym

Parameter

Test condition(1)

Min.

Typ.

Max.

Unit

VCC (2)

Operating voltage

Clock

1.0

4.4

I2C bus (400 kHz)

1.3

4.4

ICC1

Supply current

SCL = 400 kHz

(no load)

4.4 V

100

µA

3.6 V

µA

3.0 V

µA

2.5 V

µA

2.0 V

µA

ICC2

Supply current (standby)

SCL = 0 Hz

all inputs

≥ VCC – 0.2 V

≤ VSS + 0.2 V

SQW off

4.4 V

950

3.6 V

375

700

3.0 V at 25

°C

350

2.0 V at 25

°C

310

VIL

Input low voltage

–0.2

0.3 VCC

VIH

Input high voltage

0.7 VCC

VCC+0.3

VOL

Output low voltage

VCC = 4.4 V, IOL = 3.0 mA

(SDA)

0.4

VCC = 4.4 V, IOL = 1.0 mA

(SQW, WDO , IRQ )

0.4

VOH

Output high voltage

VCC = 4.4 V, IOH = –1.0 mA (CMOS)

2.4

Open drain pull-up supply

voltage

M41T62: IRQ /OUT

M41T64: SQW (3)

M41T65: WDO and IRQ /FT/OUT

4.4

ILI

Input leakage current

0 V ≤ VIN ≤ VCC

±1

µA

ILO

Output leakage current

0 V ≤ VOUT ≤ VCC

±1

µA

1. Valid for ambient operating temperature: TA = –40 to 85 °C; VCC = 1.3 V to 4.4 V (except where noted).

2. Oscillator startup guaranteed at 1.5 V only.

3. While the M41T64’s SQW output is open drain, the reader is reminded that the SQW output on the M41T62

is CMOS and hence is not included in this list.

M41T62, M41T64, M41T65

DC and AC parameters

DS3840 - Rev 24

page 24/42

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