M41T0 데이터 시트보기 (PDF) - STMicroelectronics

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M41T0

SERIAL REAL-TIME CLOCK

STMicroelectronics 

M41T0

Table 5. DC Characteristics

Sym

Parameter

ILI Input Leakage Current

ILO Output Leakage Current

ICC1 Supply Current

ICC2(2) Supply Current (Standby)

VIL Input Low Voltage

Test Condition(1)

Min

Typ

0V ≤ VIN ≤ VCC

0V ≤ VOUT ≤ VCC

3.0V

35

Frequency (SCL) = 400kHz

5.5V

130

All inputs = VCC – 0.2V

3.0V

0.9

Frequency (SCL) = 0Hz

5.5V

–0.3

VIH Input High Voltage

0.7 VCC

Output Low Voltage

VOL Output Low Voltage (Open

Drain)

IOL = 3mA

IOL = 10mA

Note: 1. Valid for Ambient Operating Temperature: TA = –40 to 85°C; VCC = 2.0 to 5.5V (except where noted).

2. At 25°C.

Max Unit

±1

µA

±1

µA

55

µA

200 µA

1.2 µA

31

µA

0.3 VCC V

VCC +

0.3

V

0.4

V

0.4

V

Table 6. Crystal Electrical Characteristics

Symbol

Parameter(1,2)

Min

Typ

Max

Unit

fO

Resonant Frequency

32.768

kHz

RS

Series Resistance

60(3)

KΩ

CL

Load Capacitance

12.5

pF

Note: 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. KDS can be contacted at kou-

hou@kdsj.co.jp or http://www.kdsj.co.jp for further information on this crystal type.

2. Load capacitors are integrated within the M41T0. 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. RS = 40kΩ when VCC ≤ 2.5V.

8/20

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