M41T80(2002) 查看數據表（PDF） - STMicroelectronics

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M41T80
(Rev.:2002)

SERIAL ACCESS RTC WITH ALARMS

STMicroelectronics 

M41T80

DC AND AC PARAMETERS

This section summarizes the operating and mea-

surement 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 Measure-

ment Conditions listed in the relevant tables. De-

signers should check that the operating conditions

in their projects match the measurement condi-

tions when using the quoted parameters.

Table 3. Operating and AC Measurement Conditions

Parameter

Supply Voltage (VCC)

Ambient Operating Temperature (TA)

Load Capacitance (CL)

Input Rise and Fall Times

Input Pulse Voltages

Input and Output Timing Ref. Voltages

Note: Output Hi-Z is defined as the point where data is no longer driven.

Figure 5. AC Measurement I/O Waveform

M41T80

2.0 to 5.5V

–40 to 85°C

100pF

≤ 50ns

0.2VCC to 0.8 VCC

0.3VCC to 0.7 VCC

0.8VCC

0.2VCC

0.7VCC

0.3VCC

AI02568

Table 4. Capacitance

Symbol

Parameter(1,2)

CIN

Input Capacitance

COUT(3)

Output Capacitance

tLP

Low-pass filter input time constant (SDA and SCL)

Note: 1. Effective capacitance measured with power supply at 5V; sampled only, not 100% tested.

2. At 25°C, f = 1MHz.

3. Outputs deselected.

Min Max Unit

7

pF

10

pF

50

ns

5/20

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