DC and AC parameters

M41T80

20/27

Doc ID 9074 Rev 5

Table 10.

DC characteristics

Symbol

Parameter

Test condition(1)

1. Valid for ambient operating temperature: TA = –40 to 85 °C; VCC = 2.0 to 5.5 V (except where noted).

Min

Typ

Max

Unit

ILI

Input leakage current

0 V

≤ VIN ≤ VCC

±1

µA

ILO

Output leakage current

0 V

≤ VOUT ≤ VCC

±1

µA

ICC1

Supply current

Switch freq (SCL) = 400 kHz

3.0 V

30

µA

5.5 V

200

µA

ICC2

(2)

2. At 25 °C.

Supply current

(standby)

All inputs = VCC – 0.2 V

Switch freq (SCL) = 0 Hz

32KE = 1

or

SQWE = 1

3.0 V

1.8

3.0

µA

5.5 V

35

µA

32KE = 0

and

SQWE = 0

3.0 V

1.5

2.4

µA

5.5 V

31

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)(3)

3. For IRQ/FT/OUT, RST, and 32 KHz pins (open drain)

IOL = 10 mA

0.4

V

Pull-up supply voltage

(open drain)

IRQ/OUT/SQW, F32K, SCL, SDA

5.5

V

Table 11.

Crystal electrical characteristics

Sym

Parameter(1) (2)

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.

2.

Load capacitors are integrated within the M41T80. 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

fO

Resonant frequency

32.768

kHz

RS

Series resistance

60

k

Ω

CL

Load capacitance

12.5

pF