IDT5P90005

SERIAL REAL-TIME CLOCK

RTC

IDT™ SERIAL REAL-TIME CLOCK

11

IDT5P90005

REV E 031209

AC Electrical Characteristics

Unless stated otherwise, VCC = 2.0 to 5.5 V, Ambient Temperature -40 to +85

C

Note 1: Transmitter must internally provide a hold time to bridge the undefined region (300 ns max) of the falling

edge of SCL.

Power Down/Up Mode AC Waveforms

RTC Power Down/Up AC Characteristics

Note 1: Valid for ambient operating temperature: TA = –40 to 85 °C; VCC = 2.0 to 5.5 V (except where noted).

Note 2: VCC fall time should not exceed 5 mV/µs.

Parameter

Symbol

STANDARD

MODE

FAST MODE

Units

Min.

Max.

Min.

Max.

SCL Clock Frequency

100

400

kHz

Clock Low Period

4.7

1.3

µs

Clock High Period

4.0

0.6

µs

SDA and SCL Rise time

10.3

µs

SDA and SCL Fall Time

300

300

ns

START Condition Hold Time (after this

period the first clock pulse is generated)

4

µs

START Condition Setup Time (only relevant

for a repeated start condition)

4.7

0.6

µs

Data Hold Time

01.3

ns

Data Setup Time

250

100

ns

STOP Condition Setup Time

4.0

0.6

µs

Time the bus must be free before a new

transmission can start

4.7

1.3

µs

Symbol

Min.

Typ.

Max.

Units

SCL and SDA at VIH before Power Down

0ns

SCL and SDA at VIH after Power Up

10

2000

µs