Datasheet

DC and AC parameters M41T00
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Table 9. DC characteristics
Symbol Parameter
Test condition
(1)
Min Typ Max Unit
I
LI
Input leakage current
0 V = V
IN
= V
CC
±1 µA
I
LO
Output leakage current
0 V = V
OUT
= V
CC
±1 µA
I
CC1
Supply current Switch frequency = 100 kHz 300 µA
I
CC2
RTC supply current (standby)
SCL, SDA = V
CC
– 0.3 V
70 µA
V
IL
Input low voltage –0.3
0.3V
CC
V
V
IH
Input high voltage
0.7 V
CC
V
CC
+ 0.5
V
V
OL
Output low voltage
I
OL
= 3.0 mA
0.4 V
Output low voltage (open drain) FT/OUT 5.5 V
V
BAT
(2)
Battery supply voltage
2.5
(3)
3.5
(4)
V
I
BAT
Battery supply current
T
A
= 25 °C, V
CC
= 0 V
oscillator ON, V
BAT
= 3 V
0.8 1 µA
1. Valid for ambient operating temperature: T
A
= –40 to 85 °C; V
CC
= 2.0 to 5.5 V (except where otherwise noted).
2. STMicroelectronics recommends the RAYOVAC BR1225 or BR1632 (or equivalent)as the battery supply.
3. After switchover (V
SO
), V
BAT
(min) can be 2.0 V for crystal with RS = 40 KΩ.
4. For rechargeable backup, V
BAT
(max) may be considered V
CC
.
Table 10. Crystal electrical characteristics
Symbol
Parameter
(1)(2)
Min Typ Max Units
f
O
Resonant frequency 32.768 kHz
R
S
Series resistance 60 KΩ
C
L
Load capacitance 12.5 pF
1. Externally supplied if using the SO8 package. 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 [e-mail] or http://www.kdsj.co.jp for further information on this crystal type.
2. Load capacitors are integrated within the M41T00. 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.