PCA9555N,112 NXP Semiconductors, PCA9555N,112 Datasheet - Page 6

• Manufacturer Part Number: PCA9555N,112
• Description: IC I/O EXPANDER I2C 16B 24DIP
• Manufacturer: NXP Semiconductors

Specifications of PCA9555N,112

• Package / Case: 24-DIP (0.600", 15.24mm)
• 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: Through Hole
• Includes: POR
• Logic Family: PCA
• Number Of Lines (input / Output): 16 / 16
• Operating Supply Voltage: 2.3 V to 5.5 V
• Operating Temperature Range: - 40 C to + 85 C
• Input Voltage: 2.3 V to 5.5 V
• Maximum Clock Frequency: 400 KHz
• Mounting Style: Through Hole
• Number Of Input Lines: 16
• Number Of Output Lines: 16
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: OM6285 - EVAL BOARD I2C-2002-1A568-4002 - DEMO BOARD I2C
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 568-2027-5; 935276768112; PCA9555N

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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