M41T60 Datasheet, PDF (16/23 Pages) STMicroelectronics – Serial Access Real-Time Clock

M41T60
Table 7. DC Characteristics
Sym
Parameter
Test Condition⁽¹⁾
Min Typ Max Unit
V_CC(3) Operating Voltage
Clock⁽²⁾
I²C Bus (400kHz)
1.0
3.6
V
1.3
3.6
V
V_CC = 3.6V
50
100
µA
I_CC1 Supply Current
SCL = 400kHz
V_CC = 3.0V
35
µA
(No Load)
V_CC = 2.5V
30
µA
V_CC = 2.0V
20
µA
I_CC2
Supply Current
(Standby)
SCL = 0Hz
All inputs
≥ V_CC – 0.2V
≤ V_SS + 0.2V
3.6V
3.0V @ 25°C
2.0V @ 25°C
375
700
nA
350
nA
310
nA
V_IL Input Low Voltage
–0.2
0.3 V_CC V
V_IH Input High Voltage
0.7 V_CC
V_CC + 0.3 V
V_OL Output Low Voltage
V_CC = 3.6V, I_OL = 3mA (SDA)
V_CC = 3.6V, I_OL = 1mA (OFIRQ/OUT)
0.4
V
0.4
V
Pull-up Supply
Voltage (Open Drain)
FT, OFIRQ/OUT
3.6V
V
I_LI
Input Leakage
Current
0V ≤ V_IN ≤ V_CC
–1.0
+1.0
µA
I_LO
Output Leakage
Current
0V ≤ V_OUT ≤ V_CC
–1.0
+1.0
µA
Note: 1. Valid for Ambient Operating Temperature: T_A = –40 to 85°C; V_CC = 1.3 to 3.6V (except where noted).
2. Oscillator start-up guaranteed at 1.5V only.
3. When using battery back-up, V_CC fall time should not exceed 10mV/µs.
Table 8. Crystal Electrical Characteristics
Symbol
Parameter^(1,2)
Min
Typ
Max
Unit
f_O
Resonant Frequency
32.768
kHz
R_S
Series Resistance
65⁽³⁾
kΩ
C_L
Load Capacitance
6
pF
Note: 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 [e-mail] or http://www.kdsj.co.jp.
Citizen can be contacted at [e-mail] 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.
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