M41T80 datasheet(6/20 Pages) STMICROELECTRONICS

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M41T80

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Table 5. DC Characteristics

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.

3. For IRQ/FT/OUT, RST, and 32kHz pins (Open Drain)

Table 6. Crystal Electrical Characteristics

Note: 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. KDS can be con-

tacted 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 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.

Symbol

Parameter

Test Condition(1)

Min

Typ

Max

Unit

ILI

Input Leakage

Current

≤ VIN ≤ VCC

±1

µA

ILO

Output Leakage

Current

≤ VOUT ≤ VCC

±1

µA

ICC1

Supply Current

Switch Freq (SCL) = 400kHz

3.0V

µA

5.5V

200

µA

ICC2

(2)

Supply Current

(standby)

All Inputs = VCC – 0.2V

Switch Freq (SCL) = 0Hz

32KE = 1

or SQWE = 1

3.0V

1.8

3.0

µA

5.5V

µA

32KE = 0

and SQWE = 0

3.0V

1.5

2.4

µA

5.5V

µA

VIL

Input Low Voltage

–0.3

0.3VCC

VIH

Input High Voltage

0.7VCC

VCC + 0.3

VOL

Output Low Voltage

IOL = 3.0mA

0.4

Output Low Voltage

(Open Drain)(3)

IOL = 10mA

0.4

Sym

Parameter(1,2)

Min

Typ

Max

Units

Resonant Frequency

32.768

kHz

Series Resistance

Ω

Load Capacitance

12.5

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