PCA9555D/G-T NXP Semiconductors, PCA9555D/G-T Datasheet - Page 6

• Manufacturer Part Number: PCA9555D/G-T
• Description: IC I/O EXPANDER I2C 16B 24SOIC
• Manufacturer: NXP Semiconductors
• Series: -r

Specifications of PCA9555D/G-T

• Interface: I²C, SMBus
• Number Of I /o: 16
• Interrupt Output: Yes
• Frequency - Clock: 400kHz
• Voltage - Supply: 2.3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-SOIC (0.295", 7.50mm Width)
• Includes: POR
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 568-1754-1

NXP Semiconductors
6. Functional description
PCA9555_8
Product data sheet
6.2.1 Command byte
6.1 Device address
6.2 Registers
Refer to
The command byte is the first byte to follow the address byte during a write transmission.
It is used as a pointer to determine which of the following registers will be written or read.
Table 4.
Command
0
1
2
3
4
5
6
7
Fig 8.
Figure 1 “Block diagram of
PCA9555 device address
Command byte
Register
Input port 0
Input port 1
Output port 0
Output port 1
Polarity Inversion port 0
Polarity Inversion port 1
Configuration port 0
Configuration port 1
Rev. 08 — 22 October 2009
0
1
fixed
PCA9555”.
slave address
16-bit I
0
0
2
programmable
A2
C-bus and SMBus I/O port with interrupt
A1
002aac219
A0
R/W
PCA9555
© NXP B.V. 2009. All rights reserved.
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