m41t81 STMicroelectronics, m41t81 Datasheet - Page 22

• Manufacturer Part Number: m41t81
• Description: Serial Access Real-time Clock With Alarms
• Manufacturer: STMicroelectronics

DC and AC parameters
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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 7.
1.
Figure 14. AC measurement I/O waveform
Table 8.
1.
2.
3.
Supply voltage (V
Ambient operating temperature (T
Load capacitance (C
Input rise and fall times
Input pulse voltages
Input and output timing ref. voltages
Output Hi-Z is defined as the point where data is no longer driven.
Effective capacitance measured with power supply at 5V; sampled only, not 100% tested.
At 25°C, f = 1MHz.
Outputs deselected.
Symbol
C
OUT
C
t
LP
IN
(3)
Operating and AC measurement conditions
Capacitance
CC
Input capacitance
Output capacitance
Low-pass filter input time constant (SDA and SCL)
)
L
)
0.8V CC
0.2V CC
Parameter
A
)
Parameter
(1) (2)
(1)
0.7V CC
0.3V CC
AI02568
0.2V
0.3V
Min
–40 to 85°C
2.0 to 5.5V
CC
CC
M41T81
100pF
≤ 50ns
to 0.8 V
to 0.7 V
Max
10
50
7
M41T81
CC
CC
Unit
pF
pF
ns