PCA9535 datasheet(13/19 Pages) PHILIPS

13 / 19 page

Philips Semiconductors

Product data

PCA9535

16-bit I2C and SMBus, low power I/O port with interrupt

2003 Jun 27

SDA

SCL

SU01469

tHD;STA

tLOW

tHD;DAT

tSU;DAT

tHIGH

tSU;STA

tHD;STA

tSP

tSU;STD

tBUF

Figure 14. Definition of timing

AC CHARACTERISTICS

SYMBOL

PARAMETER

STANDARD MODE

I2C BUS

FAST MODE

I2C BUS

UNITS

SYMBOL

PARAMETER

MIN

MAX

MIN

MAX

UNITS

fSCL

Operating frequency

100

400

kHz

tBUF

Bus free time between STOP and START conditions

4.7

—

1.3

—

µs

tHD;STA

Hold time after (repeated) START condition

4.0

—

0.6

—

µs

tSU;STA

Repeated START condition setup time

4.7

—

0.6

—

µs

tSU;STO

Set-up time for STOP condition

4.0

—

0.6

—

µs

tVD;ACK

Valid time of ACK condition2

0.3

3.45

0.1

0.9

µs

tHD;DAT

Data in hold time

—

tVD;DAT

Data out valid time3

300

—

tSU;DAT

Data set-up time

250

—

100

—

tLOW

Clock LOW period

4.7

—

1.3

—

µs

tHIGH

Clock HIGH period

4.0

—

0.6

—

µs

Clock/Data fall time

—

300

20 + 0.1Cb 1

300

Clock/Data rise time

—

1000

20 + 0.1Cb 1

300

tSP

Pulse width of spikes that must be suppressed by the input

filters

—

Port Timing

tPV

Output data valid

—

200

—

200

tPS

Input data set-up time

150

—

150

—

tPH

Input data hold time

—

µs

Interrupt Timing

tIV

Interrupt valid

—

µs

tIR

Interrupt reset

—

µs

NOTES:

1. Cb = total capacitance of one bus line in pF.

2. tVD;ACK = time for Acknowledgement signal from SCL LOW to SDA (out) LOW.

3. tVD;DAT = minimum time for SDA data out to be valid following SCL LOW.

4. tPV measured from 0.7VDD on SCL to 50% I/O output.

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