Datasheet > PCA9704PW

PCA9704PW

更新时间： 2024-11-15 15:18:51

品牌	Logo	应用领域
恩智浦 - NXP		/
页数	文件大小	规格书
26页	504K
描述
18 V tolerant SPI 8-bit GPI with maskable INT - AEC_Q100 compliant

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PCA9704PW 技术参数

生命周期：	Active	Reach Compliance Code：	unknown
HTS代码：	8542.39.00.01	风险等级：	5.65
接口集成电路类型：	INTERFACE CIRCUIT	Base Number Matches：	1

PCA9704PW 数据手册

PCA9704

18 V tolerant SPI 8-bit GPI with maskable INT

Rev. 1 — 10 December 2015

Product data sheet

1. General description

The PCA9704 is a low power 18 V tolerant SPI General Purpose Input (GPI) shift register

designed to monitor the status of switch inputs. It generates an interrupt when one or

more of the switch inputs change state but allows selected inputs to not generate

interrupts using the interrupt masking feature. The input level is recognized as a HIGH

when it is greater than 0.8  V_DDand as a LOW when it is less than 0.55  V_DD(minimum

LOW threshold of 2.5 V at 5 V node). The PCA9704 can monitor up to 8 switch inputs.

The falling edge of the CS pin samples the input port status and clears the interrupt. When

CS is LOW, the rising edge of the SCLK loads the shift register and shifts the value out of

the shift register. The serial input is sampled on the falling edge of SCLK. The contents of

the shift register are loaded into the interrupt mask register of the device on the rising

edge of CS.

Each of the input ports has a 18 V breakdown ESD protection circuit, which dumps the

ESD/overvoltage current to ground. When used with a series resistor (minimum 100 k),

the input can connect to a 12 V battery and support double battery, reverse battery, 27 V

jump start and 40 V load dump conditions in automotive applications. Higher voltages can

be tolerated on the inputs depending on the series resistor used to limit the input current.

The INT_EN pin is used to both enable the GPI pins and to enable the INT output pin to

minimize battery drain in cyclically supplied pull-up or pull-down applications. The SDIN

pull-down prevents floating nodes when the device is used in daisy-chain applications.

With both the high breakdown voltage and high ESD, this device is useful for both

automotive (AEC-Q100 compliance available) and mobile applications.

2. Features and benefits

 8 general purpose input ports

 18 V tolerant input ports with 100 k external series resistor

 Input LOW threshold 0.55  V_DDwith minimum of 2.5 V at V_DD= 4.5 V

 Open-drain interrupt output

 Interrupt enable pin (INT_EN) disables GPI pins and interrupt output

 Interrupt-masking feature allows no interrupt generation from selected inputs

 V_DDrange: 4.5 V to 5.5 V

 I_DDis very low 2.5 A maximum

 SPI serial interface with speeds up to 5 MHz

 SPI supports daisy-chain connection for large switch numbers

 AEC-Q100 compliance available

12 3 4 5 6 7...26

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与PCA9704PW相关器件

型号	品牌	获取价格	描述	数据表
PCA9704PWJ	NXP	获取价格	PCA9704 - 18 V tolerant SPI 8-bit GPI with maskable INT TSSOP 16-Pin
PCA9745B	NXP	获取价格	16-channel SPI serial bus 57 mA/20 V constant current LED driver
PCA9745BTW	NXP	获取价格	16-channel SPI serial bus 57 mA/20 V constant current LED driver
PCA9745BTWJ	NXP	获取价格	PCA9745B - 16-channel SPI serial bus 57 mA/20 V constant current LED driver TSSOP2 28-Pin
PCA9745BTWQ900	NXP	获取价格	16-channel SPI serial bus 57 mA/20 V constant current LED driver
PCA9846BS	NXP	获取价格	4-channel ultra-low voltage, Fm I2C-bus switch with reset
PCA9846PW	NXP	获取价格	4-channel ultra-low voltage, Fm I2C-bus switch with reset
PCA9846PWJ	NXP	获取价格	4-channel ultra-low voltage, Fm I2C-bus switch with reset
PCA9847PW	NXP	获取价格	8-channel ultra-low voltage, Fm+ I2C-bus multiplexer with reset
PCA9848BS	NXP	获取价格	8-channel ultra-low voltage, Fm I2C-bus switch with reset

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