m41t81s STMicroelectronics, m41t81s Datasheet - Page 23

• Manufacturer Part Number: m41t81s
• Description: Serial Access Real-time Clock With Alarms
• Manufacturer: STMicroelectronics

5
Note:
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.
Output Hi-Z is defined as the point where data is no longer driven.
Figure 15. AC measurement I/O waveform
Table 8.
1. Effective capacitance measured with power supply at 5V; sampled only, not 100% tested.
2. At 25°C, f = 1MHz
3. Outputs deselected
Supply Voltage (V
Ambient Operating Temperature (T
Load Capacitance (C
Input Rise and Fall Times
Input Pulse Voltages
Input and Output Timing Ref. Voltages
Symbol
C
OUT
C
t
LP
IN
(3)
Operating and AC measurement conditions
Capacitance
0.8V CC
0.2V CC
CC
)
L
Low-pass filter input time constant (SDA and SCL)
)
Parameter
A
)
Output Capacitance
Parameter
Input Capacitance
(1) and (2)
AI02568
0.7V CC
0.3V CC
0.2V
0.3V
Min
–40 to 85°C
2.7 to 5.5V
M41T81S
CC
CC
≤ 50ns
100pF
to 0.8 V
to 0.7 V
Max
10
50
7
CC
CC
Unit
pF
pF
23/31
ns