Datasheet

Table 12. Capacitance
Symbol
Parameter
(1) (2)
Min. Max. Unit
C
IN
Input capacitance - 7 pF
C
OUT
(3)
Output capacitance - 10 pF
t
LP
Low-pass filter input time constant (SDA and SCL) - 50 ns
1. At 25°C, f = 1 MHz.
2. Effective capacitance measured with power supply at 3.6 V; sampled only, not 100% tested.
3. Outputs deselected.
Table 13. DC characteristics
Sym Parameter
Test condition
(1)
Min. Typ. Max. Unit
V
CC
(2)
Operating voltage
Clock 1.0 4.4 V
I
2
C bus (400 kHz)
1.3 4.4 V
I
CC1
Supply current
SCL = 400 kHz
(no load)
4.4 V 100 µA
3.6 V 50 70 µA
3.0 V 35 µA
2.5 V 30 µA
2.0 V 20 µA
I
CC2
Supply current (standby)
SCL = 0 Hz
all inputs
≥ V
CC
– 0.2 V
≤ V
SS
+ 0.2 V
SQW off
4.4 V 950 nA
3.6 V 375 700 nA
3.0 V at 25
°C
350 nA
2.0 V at 25
°C
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
= 4.4 V, I
OL
= 3.0 mA
(SDA)
0.4 V
V
CC
= 4.4 V, I
OL
= 1.0 mA
(SQW,
WDO , IRQ )
0.4 V
V
OH
Output high voltage
V
CC
= 4.4 V, I
OH
= –1.0 mA (CMOS)
2.4 V
Open drain pull-up supply
voltage
M41T62: IRQ /OUT
M41T64: SQW
(3)
M41T65: WDO and IRQ /FT/OUT
4.4 V
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
1. Valid for ambient operating temperature: T
A
= –40 to 85 °C; V
CC
= 1.3 V to 4.4 V (except where noted).
2. Oscillator startup guaranteed at 1.5 V only.
3. While the M41T64’s SQW output is open drain, the reader is reminded that the SQW output on the M41T62
is CMOS and hence is not included in this list.
M41T62, M41T64, M41T65
DC and AC parameters
DS3840 - Rev 24
page 24/42