PCA9501 datasheet(16/28 Pages) NXP

Part #	PCA9501

Description	8-bit I2C-bus and SMBus I/O port with interrupt, 2-kbit EEPROM and 6 address pins

PDF	28 Pages

Scroll/Zoom	100%

Manufacturer	NXP [NXP Semiconductors]

Direct Link	http://www.nxp.com

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16 / 28 page

PCA9501_4

Product data sheet

Rev. 04 — 10 February 2009

16 of 28

NXP Semiconductors

PCA9501

8-bit I2C-bus and SMBus I/O port with interrupt, 2-kbit EEPROM

Remark: Rapid fall-off in VOH at current inception is due to a diode that provides 5 V

overvoltage protection for the GPIO I/O pins. When the GPIO I/Os are being used as

inputs, the internal current source VOH should be evaluated to determine if external pull-up

resistors are required to provide sufﬁcient VIH threshold noise margin.

a. Tamb = −40 °Cb. Tamb = 25 °C

c. Tamb = 85 °C

Fig 23. VOH versus IOH

−160

−40

IOH

(

µA)

VOH (V)

3.6

1.2

2.4

002aad307

VDD = 2.5 V

2.7 V

3.0 V

3.3 V

3.6 V

−100

−140

−20

−60

−100

IOH

(

µA)

VOH (V)

3.6

1.2

2.4

002aad308

VDD = 2.5 V

2.7 V

3.0 V

3.3 V

3.6 V

−140

−20

−60

−100

IOH

(

µA)

VOH (V)

3.6

1.2

2.4

002aad309

VDD = 2.5 V

2.7 V

3.0 V

3.3 V

3.6 V

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