M41T94MH6F datasheet(10/31 Pages) STMICROELECTRONICS

10 / 31 page

M41T94

10/31

Table 6. DC Characteristics

Note: 1. Valid for Ambient Operating Temperature: TA = –40 to 85°C; VCC = 2.7 to 5.5V (except where noted).

2. RSTIN1 and RSTIN2 internally pulled-up to VCC through 100KΩ resistor. WDI internally pulled-down to VSS through 100KΩ resistor.

3. Outputs Deselected.

4. For SQW pin (CMOS).

5. For IRQ/FT/OUT, RST pins (Open Drain): if pulled-up to supply other than VCC, this supply must be equal to, or less than 3.0V when

VCC = 0V (during battery back-up mode).

6. For rechargeable back-up, VBAT (max) may be considered VCC.

Table 7. Crystal Electrical Characteristics (Externally Supplied)

Note: 1. Load capacitors are integrated within the M41T94. 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. These characteristics are externally supplied.

2. 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 kouhou@kdsj.co.jp or ht-

tp://www.kdsj.co.jp for further information on this crystal type.

Symb.

Parameter

Test Condition(1)

Min

Typ

Max

Unit

IBAT

Battery Current OSC ON

TA = 25°C, VCC = 0V,

VBAT = 3V

400

500

Battery Current OSC OFF

ICC1

Supply Current

f = 2 MHz

ICC2

Supply Current (Standby)

SCL, SDI = VCC – 0.3V

1.4

ILI

(2)

Input Leakage Current

≤ VIN ≤ VCC

±1

µA

ILO

(3)

Output Leakage Current

≤ VOUT ≤ VCC

±1

µA

VIH

Input High Voltage

0.7VCC

VCC + 0.3

VIL

Input Low Voltage

–0.3

0.3VCC

VBAT

Battery Voltage

2.5

3.5(6)

VOH

Output High Voltage(4)

IOH = –1.0mA

2.4

VOL

Output Low Voltage(4)

IOL = 3.0mA

0.4

Output Low Voltage (Open Drain)(5)

IOL = 10mA

0.4

VPFD

Power Fail Deselect (THS = VCC)

4.20

4.40

4.50

Power Fail Deselect (THS = VSS)

2.55

2.60

2.70

VSO

Battery Back-up Switchover

2.5

Symbol

Parameter(1,2)

Typ

Min

Max

Unit

Resonant Frequency

32.768

kHz

Series Resistance

Ω

Load Capacitance

12.5

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