M41T93 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

M41T93

Serial SPI bus RTC with battery switchover

STMicroelectronics 

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DC and AC parameters

M41T93

Figure 18. Power down/up mode AC waveforms

VCC

VSO

tPD

SCL

SDI

DON'T CARE

trec

AI11839

Table 21. Power down/up trip points DC characteristics

Sym

Parameter(1)(2)

Min Typ Max Unit

S

2.85 2.93

3.0

V

VRST Reset threshold voltage

R 2.55 2.63 2.7

V

Z

2.25 2.32 2.38

V

Battery back-up switchover

VSO

Hysteresis

VRST

V

25

mV

Reset pulse Width (VCC Rising)

140

280

ms

trec VCC to Reset Delay, VCC = (VRST + 100mV), falling to

(VRST – 100mV; for VCC slew rate of 10mV/µs

2.5

µs

1. All voltages referenced to VSS.

2. Valid for Ambient Operating Temperature: TA = –40 to 85°C; VCC = 2.38 to 5.5V (except where noted).

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