参数资料
型号: PCA8575BQ,118
厂商: NXP Semiconductors
文件页数: 3/30页
文件大小: 0K
描述: IC I/O EXPANDER I2C 16B 24DHVQFN
标准包装: 3,000
接口: I²C
输入/输出数: 16
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: 24-VFQFN 裸露焊盘
供应商设备封装: 24-DHVQFN(5.5x3.5)
包装: 带卷 (TR)
包括: POR
其它名称: 935283506118
PCA8575BQ-T
PCA8575BQ-T-ND
PCA8575_2
NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 02 — 21 March 2007
11 of 30
NXP Semiconductors
PCA8575
Remote 16-bit I/O expander for I2C-bus with interrupt
8.4 Power-on reset
When power is applied to VDD, an internal Power-On Reset (POR) holds the PCA8575 in
a reset condition until VDD has reached VPOR. At that point, the reset condition is released
and the PCA8575 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 PCA8575 provides an open-drain interrupt (INT) which can be fed to a corresponding
input of the microcontroller (see Figure 12, Figure 13, and Figure 14). This gives these
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 tv(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 denitely
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.
Fig 14. Application of multiple PCA8575s with interrupt
002aac676
VDD
MICROCOMPUTER
INT
PCA8575
INT
PCA8575
INT
device 1
device 2
PCA8575
INT
device 8
相关PDF资料
PDF描述
PCA8575DK,118 IC I/O EXPANDER I2C 16B 24QSOP
PCA9500D,112 IC I/O EXPANDER I2C 8B 16SOIC
PCA9535HF,118 IC I/O EXPANDER I2C 16B 24HWQFN
PCA9535CHF,118 IC I/O EXPANDER I2C 16B 24HWQFN
PCA9500PW,118 IC I/O EXPANDER I2C 8B 16TSSOP
相关代理商/技术参数
参数描述
PCA8575BQ-T 功能描述:接口-I/O扩展器 16-BIT I2C FM QB GPIO INT 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
PCA8575BS 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Remote 16-bit I/O expander for I2C-bus with interrupt
PCA8575BS,118 功能描述:接口-I/O扩展器 16-BIT I2C FM QB 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
PCA8575BS-T 功能描述:接口-I/O扩展器 16-BIT I2C FM QB GPIO INT 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
PCA8575D 功能描述:接口-I/O扩展器 16-BIT I2C FM QB GPIO INT 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