M41T82_08 Datasheet, PDF (45/58 Pages) STMicroelectronics – Serial I2C bus RTC with battery switchover

M41T82 M41T83
5
DC and AC parameters
DC and AC parameters
This section summarizes the operating and measurement conditions, as well as the dc and
ac characteristics of the device. The parameters in the following DC and AC Characteristic
tables are derived from tests performed under the Measurement Conditions listed in the
relevant tables. Designers should check that the operating conditions in their projects match
the measurement conditions when using the quoted parameters.
Table 18. Operating and AC measurement conditions⁽¹⁾
Parameter
M41T8x
Supply voltage (V_CC)
Ambient operating temperature (T_A)
Load capacitance (C_L)
Input rise and fall times
Input pulse voltages
Input and output timing ref. voltages
1. Output Hi-Z is defined as the point where data is no longer driven.
2.38 V to 5.5 V
–40 to 85°C
50 pF
≤ 5 ns
0.2 V_CC to 0.8 V_CC
0.3 V_CC to 0.7 V_CC
Figure 23. Measurement AC I/O waveform
0.8VCC
0.2VCC
0.7VCC
0.3VCC
AI02568
Table 19. Capacitance
Symbol
Parameter^(1,2)
Min
Max
C_IN
Input capacitance
7
C_OUT(3) Output capacitance
10
t_LP
Low-pass filter input time constant (SDA and SCL)
50
1. Effective capacitance measured with power supply at 3.6V; sampled only, not 100% tested.
2. At 25°C, f = 1 MHz.
3. Outputs deselected.
Unit
pF
pF
ns
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