PCA8550 datasheet(4/12 Pages) PHILIPS

Part #	PCA8550

Description	4-bit multiplexed/1-bit latched 5-bit I2C EEPROM

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Manufacturer	PHILIPS [NXP Semiconductors]

Direct Link	http://www.nxp.com

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Philips Semiconductors

Product specification

PCA8550

4-bit multiplexed/1-bit latched 5-bit I2C EEPROM

1998 Sep 29

4

MSB

LSB

00

NON-

MUXED

DATA

MUX

DATA D

0

MUX

DATA C

SW00219

MUX

DATA B

MUX

DATA A

Figure 2. I2C Data Byte

BLOCK DIAGRAM

5-BIT EEPROM

0

SELECT

NON_MUX_OUT

14

1

3.3V

2.5V

A20M#

MUX_OUT A

/FSBM0

IGNNE#

MUX_OUT B

/FSBM1

LINT1/NMI

MUX_OUT C

/FSBM2

LINT0/INTR

MUX_OUT D

/FSBM3

OE#

13

3

1

2

15

4

5

6

7

CHIP

SET

SCL

I2C CLOCK

SDA

I2C DATA

WRITE

PROTECT

A20M#

MUX_IN A

IGNNE#

MUX_IN B

LINT1/NMI

MUX_IN C

LINT0/INTR

MUX_IN D

VCC3.3 = 16

GND = 8

OVERRIDE#

CRESET#

MUX_SELECT

10–30k

Ω

100–150k

Ω

10–30k

Ω

PENTIUM PRO/

PENTIUM II

PROCESSORS

12

11

10

9

SW00347

10–30k

Ω

NMO

LATCH

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