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M41T60 Datasheet(PDF) 17 Page - STMicroelectronics

Part # M41T60
Description  Serial access real-time clock
PDF  24 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M41T60 Datasheet(HTML) 17 Page - STMicroelectronics

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M41T60
DC and AC parameters
17/24
Table 7. DC Characteristics
Symbol
Parameter
Test Condition(1)
Min
Typ
Max
Unit
VCC
(2)
Operating Voltage
Clock (3)
1.0
4.4
V
I2C Bus (400kHz)
1.3
4.4
V
ICC1
Supply Current
SCL = 400kHz
(No Load)
VCC = 4.4V
100
µA
VCC = 3.6V
50
70
µA
VCC = 3.0V
35
µA
VCC = 2.5V
30
µA
VCC = 2.0V
20
µA
ICC2
Supply Current
(Standby)
SCL = 0Hz
All inputs
≥ VCC – 0.2V
≤VSS + 0.2V
4.4V
950
nA
3.6V
375
700
nA
3.0V @ 25°C
350
nA
2.0V @ 25°C
310
nA
VIL
Input Low Voltage
–0.2
0.3 VCC
V
VIH
Input High Voltage
0.7 VCC
VCC + 0.3
V
VOL
Output Low Voltage
VCC = 4.4V, IOL = 3mA (SDA)
0.4
V
VCC = 4.4V, IOL = 1mA (OFIRQ/OUT)
0.4
V
Pull-up Supply
Voltage (Open Drain)
FT, OFIRQ/OUT
4.4
V
ILI
Input Leakage
Current
0V
≤VIN ≤VCC
–1.0
+1.0
µA
ILO
Output Leakage
Current
0V
≤VOUT ≤VCC
–1.0
+1.0
µA
1.
Valid for Ambient Operating Temperature: TA = –40 to 85°C; VCC = 1.3 to 4.4V (except where noted).
2.
When using battery back-up, VCC fall time should not exceed 10mV/µs.
3.
Oscillator start-up guaranteed at 1.5V only.
Table 8. Crystal electrical characteristics
Symbol
Parameter (1)(2)
Min
Typ
Max
Unit
fO
Resonant Frequency
32.768
kHz
RS
Series Resistance
(TA = –40 to 70°C, oscillator start-up at 2.0V)
75 (3)(4)
k
Ω
CL
Load Capacitance
6
pF
1.
These values are externally supplied. STMicroelectronics recommends the Citizen CFS-145 (1.5x5mm) and the KDS DT-
38 (3x8mm) for thru-hole, or the KDS DMX-26S (3.2x8mm) for surface-mount, tuning fork-type quartz crystals.
KDS can be contacted at kouhou@kdsj.co.jp or http://www.kdsj.co.jp.
Citizen can be contacted at csd@citizen-america.com or http://www.citizencrystal.com.
2.
Load capacitors are integrated within the M41T60. Circuit board layout considerations for the 32.768KHz crystal of
minimum trace lengths and isolation from RF generating signals should be taken into account.
3.
Guaranteed by design.
4.
RS (max) = 65kΩ for TA = –40 to 85°C and oscillator start-up at 1.5V.



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