PCA9502_3

© NXP B.V. 2006. All rights reserved.

Product data sheet

Rev. 03 — 13 October 2006

13 of 25

NXP Semiconductors

PCA9502

10. SPI operation

11. Limiting values

[1]

5.5 V steady state voltage tolerance on inputs and outputs is valid only when the supply voltage is present.

4.6 V steady state voltage tolerance on inputs and outputs when no supply voltage is present.

R/W = 0; A[3:0] = register address

a. Register write

R/W = 1; A[3:0] = register address

b. Register read

Fig 12. SPI operation

Table 13.

Register address byte (SPI)

Bit

Name

Function

7R/W

1: read from PCA9502

0: write to PCA9502

6:3

A[3:0]

internal register select

2:1

-

not used, set to 0

0

-

not used

SI

A1

A2

A3

R/W

SCLK

0

A0

X

0

D6

D7

D4

D5

D2

D3

D0

D1

002aab925

SI

A1

A2

A3

R/W

SCLK

0

A0

X

0

SO

D6

D7

D4

D5

D2

D3

D0

D1

002aab926

Table 14.

Limiting values

In accordance with the Absolute Maximum Rating System (IEC 60134).

Symbol

Parameter

Conditions

Min

Max

Unit

supply voltage

−0.3

+4.6

V

input voltage

any input

−0.3

+5.5[1]

V

input current

any input

−10

+10

mA

output current

any output

−10

+10

mA

total power dissipation

-

300

mW

P/out

power dissipation per output

-

50

mW

ambient temperature

−40

+85

°C

storage temperature

−65

+150

°C