参数资料
| 型号： | PCA9673D,112 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 7/33页 |
| 文件大小： | 0K |
| 描述： | IC I/O EXPANDER I2C 16B 24SOIC |
| 标准包装： | 30 |
| 接口： | I²C |
| 输入/输出数： | 16 |
| 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： | 24-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 24-SO |
| 包装： | 管件 |
| 包括： | POR |
| 其它名称： | 935283555112 PCA9673D PCA9673D-ND |
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PCA9673
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 2 — 29 September 2011
15 of 33
NXP Semiconductors
PCA9673
Remote 16-bit I/O expander for Fm+ I2C-bus with interrupt and reset
8.4 Power-on reset
When power is applied to VDD, an internal Power-On Reset (POR) holds the PCA9673 in
a reset condition until VDD has reached VPOR. At that point, the reset condition is released
and the PCA9673 registers and I2C-bus/SMBus state machine will initialize to their default
states. Thereafter VDD must be lowered below 0.2 V to reset the device.
8.5 Interrupt output (INT)
The PCA9673 provides an open-drain interrupt (INT) which can be fed to a corresponding
chips a kind of master function which can initiate an action elsewhere in the system.
An interrupt is generated by any rising or falling edge of the port inputs. After time t(v)D the
signal INT is valid.
The interrupt disappears when data on the port is changed to the original setting or data is
read from or written to the device which has generated the interrupt.
In the write mode, the interrupt may become deactivated (HIGH) on the rising edge of the
write to port pulse. On the falling edge of the write to port pulse the interrupt is definitely
deactivated (HIGH).
The interrupt is reset in the read mode on the rising edge of the read from port pulse.
During the resetting of the interrupt itself, any changes on the I/Os may not generate an
interrupt. After the interrupt is reset any change in I/Os will be detected and transmitted as
an INT.
8.6 RESET input
A reset can be accomplished by holding the RESET pin LOW for a minimum of tw(rst). The
PCA9673 registers and I2C-bus state machine will be held in their default state until the
RESET input is once again HIGH.
Fig 17. Application of multiple PCA9673s with interrupt
002aac308
VDD
MICROCOMPUTER
INT
PCA9673
INT
PCA9673
INT
device 1
device 2
PCA9673
INT
device 8
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相关代理商/技术参数 |
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| PCA9673DB | 功能描述:接口-I/O扩展器 16BIT I2C FM+ QBGPIO 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 |
| PCA9673DB,112 | 功能描述:接口-I/O扩展器 16BIT I2C FM+ QBGPIO 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 |
| PCA9673DB,118 | 功能描述:接口-I/O扩展器 16BIT I2C FM+ QBGPIO 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 |
| PCA9673DB-T | 功能描述:接口-I/O扩展器 16BIT I2C FM+ QBGPIO 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 |
| PCA9673DK,118 | 功能描述:接口-I/O扩展器 16BIT I2C FM+ QBGPIO 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 |
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