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PCA9558 Datasheet(PDF) 3 Page - NXP Semiconductors

Part No. PCA9558
Description  8-bit I2C and SMBus I/O port with 5-bit multiplexed/1-bit latched 6-bit I2C EEPROM and 2 k bit EEPROM
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Maker  PHILIPS [NXP Semiconductors]
Homepage  http://www.nxp.com
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PCA9558 Datasheet(HTML) 3 Page - NXP Semiconductors

 
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Philips Semiconductors
Product data
PCA9558
8-bit I2C and SMBus I/O port with 5-bit multiplexed/1-bit
latched 6-bit I2C EEPROM and 2 k bit EEPROM
2002 May 24
3
PIN DESCRIPTION
PIN NUMBER
SYMBOL
FUNCTION
1
SCL
Serial I2C bus clock
2
SDA
Serial bi-directional I2C bus data
3
I/O_OUT_LOW
Active-LOW control forces all GPIO to logic 0 outputs
4
A0
A0 Address
5–9
MUX_IN A–E
External inputs to multiplexer
10
GND
Ground
11–18
I/O[0–7]
General purpose Input/Output 0 through 7 (open drain outputs)
19
MUX_SELECT
Active-LOW Select of MUX_IN inputs or EEPROM contents for MUX_OUT outputs
20–24
MUX_OUT E–A
Open drain multiplexed outputs
25
NON_MUXED_OUT
Open drain outputs from non-volatile memory
26
MUX_OUT_LOW
Active-LOW control forces all MUX outputs to logic 0
27
WP
Active-HIGH EEPROM write protect
28
VDD
Power supply : +3.0 to +3.6 V


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