NXP Semiconductors
5. Pinning information
5.1 Pinning
PCA9550
2-bit I2C-bus LED driver with programmable blink rates
A0 1
LED0 2
LED1 3
VSS 4
8 VDD
7 SDA
PCA9550D
6 SCL
5 RESET
002aad238
Fig 2. Pin configuration for SO8
terminal 1
index area
A0 1
LED0 2
LED1 3
VSS 4
PCA9550DP
8 VDD
7 SDA
6 SCL
5 RESET
002aad239
Fig 3. Pin configuration for TSSOP8
A0 1
LED0 2
LED1 3
VSS 4
PCA9550TK
8 VDD
7 SDA
6 SCL
5 RESET
002aad240
Transparent top view
Fig 4. Pin configuration for HVSON8
5.2 Pin description
Table 3.
Symbol
A0
LED0
LED1
VSS
RESET
SCL
SDA
VDD
Pin description
Pin
1
2
3
4
5
6
7
8
Description
address input 0
LED driver 0
LED driver 1
supply ground
active LOW reset input
serial clock line
serial data line
supply voltage
PCA9550_5
Product data sheet
Rev. 05 — 13 October 2008
© NXP B.V. 2008. All rights reserved.
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