参数资料
| 型号： | PCA9672D,512 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 2/36页 |
| 文件大小： | 0K |
| 描述： | IC I/O EXPANDER I2C 8B 16SOIC |
| 标准包装： | 48 |
| 接口： | I²C |
| 输入/输出数： | 8 |
| 中断输出： | 是 |
| 频率 - 时钟： | 1MHz |
| 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-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 16-SO |
| 包装： | 管件 |
| 包括： | POR |
| 其它名称： | 935282746512 PCA9672D PCA9672D-ND |
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PCA9672
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 3 — 27 May 2013
10 of 36
NXP Semiconductors
PCA9672
Remote 8-bit I/O expander for Fm+ I2C-bus with interrupt and reset
There is only one register to control four possibilities of the port pin: Input HIGH, input
LOW, output HIGH, or output LOW.
Input HIGH: The master needs to write 1 to the register to set the port as an input mode
if the device is not in the default power-on condition. The master reads the register to
check the input status. If the external source pulls the port pin up to VDD or drives
logic 1, then the master will read the value of 1.
Input LOW: The master needs to write 1 to the register to set the port to input mode if
the device is not in the default power-on condition. The master reads the register to
check the input status. If the external source pulls the port pin down to VSS or drives
logic 0, which sinks the weak 100
A current source, then the master will read the value
of 0.
Output HIGH: The master writes 1 to the register. There is an additional ‘accelerator’ or
strong pull-up current when the master sets the port HIGH. The additional strong pull-up
is only active during the HIGH time of the acknowledge clock cycle. This accelerator
current helps the port’s 100
A current source make a faster rising edge into a heavily
loaded output, but only at the start of the acknowledge clock cycle to avoid bus
contention if an external signal is pulling the port LOW to VSS/driving the port with
logic 0 at the same time. After the half clock cycle there is only the 100
A current
source to hold the port HIGH.
Output LOW: The master writes 0 to the register. There is a strong current sink
transistor that holds the port pin LOW. A large current may flow into the port, which
could potentially damage the part if the master writes a 0 to the register and an external
source is pulling the port HIGH at the same time.
Fig 12. Simple quasi-bidirectional I/O
002aah683
VDD
weak 100 A
current source
(inactive when
output LOW)
output HIGH
VSS
output LOW
accelerator
pull-up
P port
P7 - P0
pull-down with
resistor to VSS or
external drive LOW
input LOW
pull-up with
resistor to VDD or
external drive HIGH
input HIGH
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PDF描述 |
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| PCA9674PW,118 | IC I/O EXPANDER I2C 8B 16TSSOP |
| 1-583718-5 | CONN HOUSING 40POS DUAL .100 BLK |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| PCA9672D-T | 功能描述:接口-I/O扩展器 8BIT I2C FM+ QB GPIO INT-RS PU 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 |
| PCA9672PW | 功能描述:接口-I/O扩展器 8BIT I2C FM+ QB GPIO INT-RS PU 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 |
| PCA9672PW,112 | 功能描述:接口-I/O扩展器 8BIT I2C FM+ QB GPIO 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 |
| PCA9672PW,118 | 功能描述:接口-I/O扩展器 8BIT I2C FM+ QB GPIO INT-RS PU 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 |
| PCA9672PW112 | 制造商:Rochester Electronics LLC 功能描述: 制造商:NXP 功能描述: 制造商:NXP Semiconductors 功能描述: |
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