参数资料
型号: PCA9554BS,118
厂商: NXP Semiconductors
文件页数: 32/35页
文件大小: 0K
描述: IC I/O EXPANDER I2C 8B 16HVQFN
产品培训模块: I²C Bus Fundamentals
特色产品: NXP - I2C Interface
标准包装: 1
接口: I²C,SM 总线
输入/输出数: 8
中断输出:
频率 - 时钟: 400kHz
电源电压: 2.3 V ~ 5.5 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 16-VQFN 裸露焊盘
供应商设备封装: 16-HVQFN
包装: 标准包装
包括: POR
产品目录页面: 826 (CN2011-ZH PDF)
配用: 568-4002-ND - DEMO BOARD I2C
其它名称: 568-3397-6
PCA9554_9554A
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 9 — 19 March 2013
6 of 35
NXP Semiconductors
PCA9554; PCA9554A
8-bit I2C-bus and SMBus I/O port with interrupt
5.2 Pin description
[1]
HVQFN16 package die supply ground is connected to both VSS pin and exposed center pad. VSS pin must
be connected to supply ground for proper device operation. For enhanced thermal, electrical, and board
level performance, the exposed pad needs to be soldered to the board using a corresponding thermal pad
on the board and for proper heat conduction through the board, thermal vias need to be incorporated in the
PCB in the thermal pad region.
6.
Functional description
6.1 Registers
6.1.1 Command byte
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 3.
Pin description
Symbol
Pin
Description
SO16, SSOP16,
TSSOP16
HVQFN16
SSOP20
A0
1
15
6
address input 0
A1
2
16
7
address input 1
A2
3
1
9
address input 2
IO0
4
2
10
input/output 0
IO1
5
3
11
input/output 1
IO2
6
4
12
input/output 2
IO3
7
5
14
input/output 3
VSS
86[1]
15
supply ground
IO4
9
7
16
input/output 4
IO5
10
8
17
input/output 5
IO6
11
9
19
input/output 6
IO7
12
10
20
input/output 7
INT
13
11
1
interrupt output (open-drain)
SCL
14
12
2
serial clock line
SDA
15
13
4
serial data line
VDD
16
14
5
supply voltage
n.c.
-
3, 8, 13, 18
not connected
Table 4.
Command byte
Command
Protocol
Function
0
read byte
Input Port register
1
read/write byte
Output Port register
2
read/write byte
Polarity Inversion register
3
read/write byte
Configuration register
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