9534 datasheet(11/17 Pages) PHILIPS

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Philips Semiconductors

Product data sheet

PCA9534

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

2004 Sep 30

tSP

tBUF

tHD;STA

tLOW

tHD;DAT

tHIGH

tSU;DAT

tSU;STA

tHD;STA

tSU;STO

SDA

SCL

SU00645

Figure 13. Definition of timing

AC SPECIFICATIONS

SYMBOL

PARAMETER

STANDARD MODE

I2C-bus

FAST MODE

I2C-bus

UNITS

MIN

MAX

MIN

MAX

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

Setup time for STOP condition

4.0

—

0.6

—

µs

tHD;DAT

Data in hold time

—

tVD;ACK

Valid time for ACK condition2

0.3

3.45

0.1

0.9

µs

tVD;DAT

Data out valid time3

300

—

tSU;DAT

Data setup 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 + 0.1 Cb1

300

Clock/Data rise time

—

1000

20 + 0.1 Cb1

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 setup time

100

—

100

—

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.

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