M41T81M6 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
M41T81M6 Datasheet PDF : 29 Pages
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DC and AC parameters
M41T81
Table 9.
Sym
DC characteristics
Parameter
Test condition(1)
Min Typ Max Unit
ILI Input leakage current
ILO Output leakage current
ICC1 Supply current
ICC2 Supply current (standby)
VIL Input low voltage
VIH Input high voltage
Output low voltage
VOL Output low voltage (open
drain)(2)
0V ≤ VIN ≤ VCC
0V ≤ VOUT ≤ VCC
Switch freq = 400 kHz
SCL,SDA = VCC – 0.3V
IOL = 3.0 mA
–0.3
0.7VCC
IOL = 10 mA
±1
µA
±1
µA
400
µA
100
µA
0.3VCC V
VCC + 0.3 V
0.4
V
0.4
V
Pull-up supply voltage
(open drain)
IRQ/OUT/FT/SQW
5.5
V
VBAT(3) Battery supply voltage
2.5(4)
3
3.5(5)
V
IBAT Battery supply current
TA = 25 °C, VCC = 0 V
oscillator on, VBAT = 3 V
0.6
1
µA
1. Valid for ambient operating temperature: TA = –40 to 85°C; VCC = 2.0 to 5.5 V (except where noted).
2. For IRQ/FT/OUT/SQW pin (open drain)
3. STMicroelectronics recommends the RAYOVAC BR1225 or BR1632 (or equivalent) as the battery supply.
4. After switchover (VSO), VBAT (min) can be 2.0 V for crystal with RS = 40 kΩ.
5. For rechargeable backup, VBAT (max) may be considered VCC.
Table 10. 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
1. 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 kouhou@kdsj.co.jp or http://www.kdsj.co.jp for further information on
this crystal type.
2. Load capacitors are integrated within the M41T81. 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.
Figure 15. Power down/up mode AC waveforms
VCC
VSO
tPD
SDA
SCL
DON'T CARE
trec
AI00596
22/29
Doc ID 7529 Rev 10
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