M41T80(2002) Просмотр технического описания (PDF) - STMicroelectronics

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M41T80
(Rev.:2002)

SERIAL ACCESS RTC WITH ALARMS

STMicroelectronics 

M41T80

Table 5. DC Characteristics

Symbol

Parameter

Test Condition(1)

Min Typ Max Unit

ILI

Input Leakage

Current

0V ≤ VIN ≤ VCC

±1

µA

ILO

Output Leakage

Current

0V ≤ VOUT ≤ VCC

±1

µA

ICC1 Supply Current

Switch Freq (SCL) = 400kHz

3.0V

5.5V

30

µA

200

µA

ICC2(2)

Supply Current

(standby)

All Inputs = VCC – 0.2V

Switch Freq (SCL) = 0Hz

32KE = 1

or SQWE = 1

32KE = 0

and SQWE = 0

3.0V

5.5V

3.0V

5.5V

1.8

3.0

µA

35

µA

1.5

2.4

µA

31

µA

VIL Input Low Voltage

–0.3

0.3VCC V

VIH Input High Voltage

0.7VCC

VCC + 0.3 V

Output Low Voltage

VOL Output Low Voltage

(Open Drain)(3)

IOL = 3.0mA

IOL = 10mA

0.4

V

0.4

V

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

Sym

Parameter(1,2)

Min

Typ

Max

Units

fO

Resonant Frequency

32.768

kHz

RS

Series Resistance

60

kΩ

CL

Load Capacitance

12.5

pF

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.

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