参数资料
| 型号： | PCA9574PW,112 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 4/33页 |
| 文件大小： | 0K |
| 描述： | IC I/O EXPANDER I2C 8B 16TSSOP |
| 标准包装： | 96 |
| 接口： | I²C，SM 总线 |
| 输入/输出数： | 8 |
| 中断输出： | 是 |
| 频率 - 时钟： | 400kHz |
| 电源电压： | 1.1 V ~ 3.6 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： | 带卷 (TR) |
| 包括： | POR |
| 其它名称： | 935285149112 PCA9574PW PCA9574PW-ND |
第1页第2页第3页当前第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页
PCA9574
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 4 — 25 April 2012
12 of 33
NXP Semiconductors
PCA9574
8-bit I2C-bus and SMBus, level translating, low volage GPIO
7.5.8 Register 7 - Interrupt status register
This register is read-only. It is used to identify the source of interrupt.
Remark: If the interrupts are masked, this register will return all zeros.
7.6 Power-on reset
When power is applied to VDD, an internal Power-On Reset (POR) holds the PCA9574 in
a reset condition until VDD has reached VPOR. At that point, the reset condition is released
and the PCA9574 registers and state machine will initialize to their default states. The
power-on reset typically completes the reset and enables the part by the time the power
supply is above VPOR. However, when it is required to reset the part by lowering the power
supply, it is necessary to lower it below 0.2 V.
7.7 RESET input
A reset can be accomplished by holding the RESET pin LOW for a minimum of tw(rst). The
PCA9574 registers and I2C-bus state machine will be held in their default state until the
RESET input is once again HIGH.
7.8 Software reset
The Software Reset Call allows all the devices in the I2C-bus to be reset to the power-up
state value through a specific formatted I2C-bus command. To be performed correctly, it
implies that the I2C-bus is functional and that there is no device hanging the bus.
The Software Reset sequence is defined as following:
1. A START command is sent by the I2C-bus master.
2. The reserved General Call I2C-bus address ‘0000 000’ with the R/W bit set to 0 (write)
is sent by the I2C-bus master.
3. The PCA9574 device(s) acknowledge(s) after seeing the General Call address
‘0000 0000’ (00h) only. If the R/W bit is set to logic 1 (read), no acknowledge is
returned to the I2C-bus master.
4. Once the General Call address has been sent and acknowledged, the master sends
1 byte. The value of the byte must be equal to 06h.The PCA9574 acknowledges this
value only. If the byte is not equal to 06h, the PCA9574 does not acknowledge it. If
more than 1 byte of data is sent, the PCA9574 does not acknowledge anymore.
Table 12.
Register 7 - Interrupt status register (address 07h) bit description
Legend: * default value.
Bit
Symbol
Access
Value
Description
7
S0.7
read only
0*
identifies source of interrupt
6
S0.6
read only
0*
5
S0.5
read only
0*
4
S0.4
read only
0*
3
S0.3
read only
0*
2
S0.2
read only
0*
1
S0.1
read only
0*
0
S0.0
read only
0*
相关PDF资料 |
PDF描述 |
|---|---|
| PCA9574PW,118 | IC I/O EXPANDER I2C 8B 16TSSOP |
| 2-964577-2 | MULTIFIT RAHMEN 2P |
| 1-964577-5 | MULTIFIT RAHMEN 5P |
| 1-964576-3 | PCB RAHMEN 13P |
| PCA8574TS,118 | IC I/O EXPANDER I2C 8B 20SSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| PCA9574PW-T | 功能描述:转换 - 电压电平 8-BIT I2C-BUS/SMBUS GPIO TRANS RoHS:否 制造商:Micrel 类型:CML/LVDS/LVPECL to LVCMOS/LVTTL 传播延迟时间:1.9 ns 电源电流:14 mA 电源电压-最大:3.6 V 电源电压-最小:3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:MLF-8 |
| PCA9575HF,118 | 功能描述:I2C 接口集成电路 16-BIT I2C-BUS SMBus LW Voltage GPIO RoHS:否 制造商:NXP Semiconductors 电源电压-最大:5.5 V 电源电压-最小:2.3 V 最大工作频率:400 KHz 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-16 |
| PCA9575HF118 | 制造商:NXP 功能描述: 制造商:NXP Semiconductors 功能描述: |
| PCA9575PW1,118 | 功能描述:I2C 接口集成电路 I2C Bus/ SMBus Level Translating 24-Pin RoHS:否 制造商:NXP Semiconductors 电源电压-最大:5.5 V 电源电压-最小:2.3 V 最大工作频率:400 KHz 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-16 |
| PCA9575PW2,118 | 功能描述:I2C 接口集成电路 I2C Bus/ SMBus Level Translating 28-Pin RoHS:否 制造商:NXP Semiconductors 电源电压-最大:5.5 V 电源电压-最小:2.3 V 最大工作频率:400 KHz 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-16 |
发布紧急采购，3分钟左右您将得到回复。