参数资料
型号: PCA9557PW,118
厂商: NXP Semiconductors
文件页数: 28/30页
文件大小: 0K
描述: IC I/O EXPANDER I2C 8B 16TSSOP
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-TSSOP(0.173",4.40mm 宽)
供应商设备封装: 16-TSSOP
包装: 标准包装
包括: POR
产品目录页面: 826 (CN2011-ZH PDF)
其它名称: 568-1061-6
PCA9557
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 7 — 10 December 2013
7 of 30
NXP Semiconductors
PCA9557
8-bit I2C-bus and SMBus I/O port with reset
7.
Functional description
7.1 Device address
Following a START condition the bus master must output the address of the slave it is
accessing. The address of the PCA9557 is shown in Figure 8. To conserve power, no
internal pull-up resistors are incorporated on the hardware selectable address pins and
they must be pulled HIGH or LOW.
The last bit of the slave address defines the operation to be performed. When set to
logic 1 a read is selected, while a logic 0 selects a write operation.
7.2 Control register
Following the successful acknowledgement of the slave address, the bus master will send
a byte to the PCA9557, which will be stored in the control register. This register can be
written and read via the I2C-bus.
Fig 8.
PCA9557 device address
002aad279
0
1
A2
A1
A0 R/W
fixed
slave address
programmable
Fig 9.
Control register
Table 4.
Register definition
D1
D0
Name
Access
Description
0
Register 0
read-only
Input port register
0
1
Register 1
read/write
Output port register
1
0
Register 2
read/write
Polarity inversion register
1
Register 3
read/write
Configuration register
002aad280
0
D1
D0
76543210
bit:
相关PDF资料
PDF描述
97-3106A-18-8S CONN PLUG 8POS W/SOCKETS
PD0070WJ30136BJ1 CAP CER 300PF 14KV 10% CHASSIS
MS3110P8-4P CONN RCPT 4POS WALL MNT W/PINS
VE-22Y-IX CONVERTER MOD DC/DC 3.3V 49.5W
MS3102A22-24S CONN RCPT 6POS BOX MNT W/SCKT
相关代理商/技术参数
参数描述
PCA9557PWG4 功能描述:接口-I/O扩展器 Rem 8B I2C & SMBus Low-Pwr I/O Expander RoHS:否 制造商:NXP Semiconductors 逻辑系列: 输入/输出端数量: 最大工作频率:100 kHz 工作电源电压:1.65 V to 5.5 V 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:HVQFN-16 封装:Reel
PCA9557PWR 功能描述:接口-I/O扩展器 Remote 8B I2C & SMBus I/O Expander RoHS:否 制造商:NXP Semiconductors 逻辑系列: 输入/输出端数量: 最大工作频率:100 kHz 工作电源电压:1.65 V to 5.5 V 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:HVQFN-16 封装:Reel
PCA9557PWRG4 功能描述:接口-I/O扩展器 Rem 8B I2C & SMBus Low-Pwr I/O Expander RoHS:否 制造商:NXP Semiconductors 逻辑系列: 输入/输出端数量: 最大工作频率:100 kHz 工作电源电压:1.65 V to 5.5 V 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:HVQFN-16 封装:Reel
PCA9557PWT 功能描述:接口-I/O扩展器 Rem 8B I2C & SMBus Lo-Pwr I/O Expander RoHS:否 制造商:NXP Semiconductors 逻辑系列: 输入/输出端数量: 最大工作频率:100 kHz 工作电源电压:1.65 V to 5.5 V 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:HVQFN-16 封装:Reel
PCA9557PW-T 制造商:NXP Semiconductors 功能描述: