M41ST84W View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

M41ST84W

3.0/3.3 V I2C serial RTC with 44 bytes of NVRAM and supervisory functions

STMicroelectronics 

DC and AC parameters

5

DC and AC parameters

M41ST84W

Note:

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 10. DC and AC measurement conditions

Parameter

VCC supply voltage

Ambient operating temperature

Load capacitance (CL)

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.

M41ST84W

2.7 to 3.6 V

–40 to 85°C

50 pF

≤ 50 ns

0.2 to 0.8VCC

0.3 to 0.7VCC

Figure 17. AC testing input/output waveforms

0.8VCC

0.2VCC

0.7VCC

0.3VCC

AI02568

Note:

50 pF for M41ST84W.

Table 11. Capacitance

Symbol

Parameter(1)(2)

Min

Max

CIN Input capacitance

7

CIO(3) Input / output capacitance

10

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

50

1. Effective capacitance measured with power supply at 3 V. Sampled only, not 100% tested.

2. At 25°C, f = 1 MHz.

3. Outputs deselected.

Unit

pF

pF

ns

28/34

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