M41T81M(2006) View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

M41T81M
(Rev.:2006)

Serial access Real-Time Clock with alarm

STMicroelectronics 

DC and AC parameters

5

DC and AC parameters

M41T81

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.

Operating and AC measurement conditions(1)

Parameter

M41T81

Supply voltage (VCC)

Ambient operating temperature (TA)

Load capacitance (CL)

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.

Figure 14. AC measurement I/O waveform

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 8. Capacitance

Symbol

Parameter(1) (2)

CIN

COUT(3)

Input capacitance

Output capacitance

tLP

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

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

22/30

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