M41ST84WMQ datasheet(8/31 Pages) STMICROELECTRONICS

8 / 31 page

M41ST84Y, M41ST84W

8/31

Table 5. DC Characteristics

Note: 1. Valid for Ambient Operating Temperature: TA = –40 to 85°C; VCC = 2.7 to 3.6V or 4.5 to 5.5V (except where noted).

2. RSTIN internally pulled-up to VCC through 100KΩ resistor. WDI internally pulled-down to VSS through 100KΩ resistor.

3. Outputs deselected.

4. For PFO and SQW pins (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 6. Crystal Electrical Characteristics (Externally Supplied)

Note: 1. Load capacitors are integrated within the M41ST84Y/W. 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.

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.

Sym

Parameter

Test

Condition(1)

M41ST84Y

M41ST84W

Unit

Min

Typ

Max

Min

Typ

Max

IBAT

Battery Current OSC

TA = 25°C,

VCC = 0V,

VBAT = 3V

400

500

400

500

Battery Current OSC

OFF

ICC1

Supply Current

f = 400kHz

1.4

0.75

ICC2

Supply Current

(Standby)

SCL, SDA =

VCC – 0.3V

0.50

ILI

(2)

Input Leakage Current

≤ VIN ≤ VCC

±1

µA

Input Leakage Current

(PFI)

–25

ILO

(3)

Output Leakage

Current

≤ VOUT ≤ VCC

±1

µA

VIH

Input High Voltage

0.7VCC

VCC + 0.3

0.7VCC

VCC + 0.3

VIL

Input Low Voltage

–0.3

0.3VCC

–0.3

0.3VCC

VBAT

Battery Voltage

2.5

3.0

3.5(6)

2.5

3.0

3.5(6)

VOH

Output High Voltage(4)

IOH = –1.0mA

2.4

VOL

Output Low Voltage

IOL = 3.0mA

0.4

Output Low Voltage

(Open Drain)(5)

IOL = 10mA

0.4

VPFD

Power Fail Deselect

4.20

4.40

4.50

2.55

2.60

2.70

VPFI

PFI Input Threshold

VCC = 5V(Y)

VCC = 3V(V)

1.225

1.250

1.275

1.225

1.250

1.275

PFI Hysteresis

PFI Rising

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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