PCA8574ATS datasheet(14/27 Pages) NXP

14 / 27 page

PCA8574_PCA8574A_2

Product data sheet

Rev. 02 — 14 May 2007

14 of 27

NXP Semiconductors

PCA8574/74A

Remote 8-bit I/O expander for I2C-bus with interrupt

12. Static characteristics

[1]

The power-on reset circuit resets the I2C-bus logic with VDD <VPOR and sets all I/Os to logic 1 (with current source to VDD).

[2]

Each bit must be limited to a maximum of 25 mA and the total package limited to 200 mA due to internal busing limits.

[3]

The value is not tested, but veriﬁed on sampling basis.

Table 7.

Static characteristics

VDD = 2.3 V to 5.5 V; VSS =0V; Tamb = −40 °Cto+85 °C; unless otherwise speciﬁed.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Supplies

VDD

supply voltage

2.3

5.5

IDD

supply current

Operating mode; no load;

VI =VDD or VSS;fSCL = 400 kHz;

AD0, AD1, AD2 = static H or L

200

500

µA

Istb

standby current

Standby mode; no load;

VI =VDD or VSS; fSCL = 0 kHz

4.5

µA

VPOR

power-on reset voltage

[1] -

1.8

2.0

Input SCL; input/output SDA

VIL

LOW-level input voltage

−0.5

+0.3VDD

VIH

HIGH-level input voltage

0.7VDD

5.5

IOL

LOW-level output current

VOL = 0.4 V; VDD = 2.3 V

VOL = 0.4 V; VDD = 3.0 V

VOL = 0.4 V; VDD = 4.5 V

leakage current

VI =VDD or VSS

−1-

µA

input capacitance

VI =VSS

I/Os; P0 to P7

IOL

LOW-level output current

VOL = 0.5 V; VDD = 2.3 V

[2] 12

VOL = 0.5 V; VDD = 3.0 V

[2] 17

VOL = 0.5 V; VDD = 4.5 V

[2] 25

IOL(tot)

total LOW-level output current

VOL = 0.5 V; VDD = 4.5 V

[2] -

200

IOH

HIGH-level output current

VOH =VSS

−30

−138

−300

µA

Itrt(pu)

transient boosted pull-up current VOH =VSS; see Figure 8

−0.5

−1.0

input capacitance

[3] -

2.1

output capacitance

[3] -

2.1

Interrupt INT (see Figure 8 and Figure 9)

IOL

LOW-level output current

VOL = 0.4 V

3.0

output capacitance

Inputs AD0, AD1, AD2

VIL

LOW-level input voltage

−0.5

+0.3VDD

VIH

HIGH-level input voltage

0.7VDD

5.5

ILI

input leakage current

−1-

µA

input capacitance

3.5

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