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 

M41ST84W

Figure 7. Bus timing requirements sequence

Operating modes

SDA

tBUF

SCL

P

tHD:STA

tR

tF

tHIGH

S

tLOW

tSU:DAT

tHD:DAT

tHD:STA

tSU:STA

SR

tSU:STO

P

AI00589

Table 2. AC characteristics

Symbol

Parameter(1)

Min

Max

Unit

fSCL

SCL clock frequency

0

400

kHz

tBUF

Time the bus must be free before a new transmission can

start

1.3

µs

tF

tHD:DAT(2)

tHD:STA

SDA and SCL fall time

Data hold time

START condition hold time

(after this period the first clock pulse is generated)

300

ns

0

µs

600

ns

tHIGH

tLOW

tR

tSU:DAT

tSU:STA

Clock high period

Clock low period

SDA and SCL rise time

Data setup time

START condition setup time

(only relevant for a repeated start condition)

600

ns

1.3

µs

300

ns

100

ns

600

ns

tSU:STO

STOP condition setup time

600

ns

1. Valid for ambient operating temperature: TA = –40 to 85°C; VCC = 2.7 to 3.6 V (except where noted).

2. Transmitter must internally provide a hold time to bridge the undefined region (300 ns max) of the falling edge of SCL.

13/34

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