M41T56C64

DC and AC parameters

13/19

Figure 6.

AC Bus timing requirements sequence (serial RTC)

Table 7. AC characteristics, (serial RTC, M41T56)

Symbol

1.

Min

Max

Unit

SCL clock frequency

0

100

kHz

Clock low period

4.7

µs

Clock high period

4

µs

SDA and SCL rise time

1

µs

SDA and SCL fall time

300

ns

START condition hold time

(after this period the first clock pulse is generated)

4µs

START condition setup time

(only relevant for a repeated start condition)

4.7

µs

Data setup time

250

ns

(2)

2.

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

edge of SCL.

Data hold time

0

µs

STOP condition setup time

4.7

µs

Time the bus must be free before a new transmission

can start

4.7

µs

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

Serial RTC

0.25

1

µs

AI00589

SDA

P

tSU:STO

tSU:STA

tHD:STA

SR

SCL

tSU:DAT

tF

tHD:DAT

tR

tHIGH

tLOW

tHD:STA

tBUF

S

P