m41t66 STMicroelectronics, m41t66 Datasheet - Page 24

• Manufacturer Part Number: m41t66
• Description: Real-time Clocks
• 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 8.
1. Output Hi-Z is defined as the point where data is no longer driven.
Figure 14. AC measurement I/O waveform
Figure 15. Crystal isolation example
1. Substrate pad should be tied to V
2. To avoid coupling between pin 4 (SQW) and pin 2 (XO), pin 3 (GND) should be routed adjacent to pin 4 for
Supply voltage (V
Ambient operating temperature (T
Load capacitance (C
Input rise and fall times
Input pulse voltages
Input and output timing ref. voltages
isolation purposes.
Operating and AC measurement conditions
CC
)
L
)
Parameter
SS
A
.
)
(1)
0.2 V
0.3 V
1.5 V to 4.4 V
–40 to 85°C
M41T66
CC
CC
≤ 5 ns
50 pF
to 0.8 V
to 0.7 V
M41T66
CC
CC