M41T62 datasheet(27/33 Pages) STMICROELECTRONICS

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M41T62/63/64/65

Table 16. Oscillator Characteristics

Note: 1. Reference value. TA = 25°C, VCC = 3.0V, CMJ-145 (CL = 6pF, 32,768Hz) manufactured by Citizen.

Figure 27. Bus Timing Requirements Sequence

Table 17. AC Characteristics

Note: 1. Valid for Ambient Operating Temperature: TA = –40 to 85°C; VCC = 1.3 to 3.6V (except where noted).

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

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

VSTA

Oscillator Start Voltage

≤ 10 seconds

1.5

tSTA

Oscillator Start Time

VCC = 3.0V

XIN

XOUT

IC-to-IC Frequency Variation (1)

–10

+10

ppm

Sym

Parameter(1)

Min

Typ

Max

Units

fSCL

SCL Clock Frequency

400

kHz

tLOW

Clock Low Period

1.3

µs

tHIGH

Clock High Period

600

SDA and SCL Rise Time

300

SDA and SCL Fall Time

300

tHD:STA

START Condition Hold Time

(after this period the first clock pulse is generated)

600

tSU:STA

START Condition Setup Time

(only relevant for a repeated start condition)

600

tSU:DAT

(2)

Data Setup Time

100

tHD:DAT

Data Hold Time

µs

tSU:STO

STOP Condition Setup Time

600

tBUF

Time the bus must be free before a new

transmission can start

1.3

µs

trec

Watchdog Output Pulse Width

AI00589

SDA

tSU:STO

tSU:STA

tHD:STA

SCL

tSU:DAT

tHD:DAT

tHIGH

tLOW

tHD:STA

tBUF

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