M41T00S DC and AC parameters
Doc ID 10772 Rev 5 19/28
Table 7. DC characteristics
Table 8. Crystal electrical characteristics
Figure 13. Power down/up mode AC waveforms
Sym Parameter Test condition
(1)
1. Valid for ambient operating temperature: T
A
= –40 to 85 °C; V
CC
= 2.7 to 5.5 V (except where noted).
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 freq = 400 kHz 300 μA
I
CC2
Supply current (standby)
SCL = 0 Hz
All Inputs
≥ V
CC
– 0.2 V
≤ V
SS
+ 0.2 V
70 μA
V
IL
Input low voltage –0.3 0.3V
CC
V
V
IH
Input high voltage 0.7V
CC
V
CC
+ 0.3 V
V
OL
Output low voltage I
OL
= 3.0 mA 0.4 V
Output low voltage (open drain)
(2)
2. For FT/OUT pin (open drain).
I
OL
= 10 mA 0.4 V
Pull-up supply voltage (open drain) FT/OUT 5.5 V
V
BAT
(3)
3. STMicroelectronics recommends the RAYOVAC BR1225 or BR1632 (or equivalent) as the battery supply.
Backup supply voltage 2.0 3.5
(4)
4. For rechargeable backup, V
BAT
(max) may be considered to be V
CC
.
V
I
BAT
Battery supply current
T
A
= 25 °C, V
CC
= 0 V
Oscillator ON, V
BAT
= 3 V
0.6 1 µA
Sym Parameter
(1)(2)
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 kouhou@kdsj.co.jp or http://www.kdsj.co.jp for further information on this crystal type.
2. Load capacitors are integrated within the M41T00S. 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.
Min Typ Max Units
f
O
Resonant frequency 32.768 kHz
R
S
Series resistance 60
(3)
3. For applications requiring backup supply operation below 2.5 V, R
S
(max) should be considered 40 kΩ.
kΩ
C
L
Load capacitance 12.5 pF
AI00596
V
CC
trec
tPD
V
SO
SDA
SCL
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