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PCA8550

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

Philips Electronics 

Philips Semiconductors

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

Product specification

PCA8550

MSB

0

0

LSB

0

NON-

MUXED

DATA

MUX

DATA D

MUX

DATA C

MUX

DATA B

MUX

DATA A

BLOCK DIAGRAM

10–30k Ω

CRESET#

13

MUX_SELECT

OVERRIDE#

3

VCC3.3 = 16

GND = 8

100–150k Ω

CHIP

SET

SCL

1

I2C CLOCK

SDA

2

I2C DATA

10–30k Ω

WRITE

15

PROTECT

OE#

4 A20M#

MUX_IN A

IGNNE#

5

MUX_IN B

LINT0/INTR

6

MUX_IN C

7 LINT1/NMI

MUX_IN D

10–30k Ω

Figure 2. I2C Data Byte

SW00219

5-BIT EEPROM

LATCH

NMO

0

SELECT

14

NON_MUX_OUT

3.3V

3.3V

2.5V A20M#

12

MUX_OUT A

/FSBM0

2.5V IGNNE#

11

MUX_OUT B

/FSBM1

3.3V

3.3V

2.5V LINT0/INTR 10

MUX_OUT C

/FSBM2

2.5V LINT1/NMI 9

MUX_OUT D

/FSBM3

1

PENTIUM PRO/

PENTIUM II

PROCESSORS

SW00347

1998 Sep 29

4

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