CY8C9540A-24PVXIT

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Number of I/O:	40
Interface:	I²C
Interrupt Output:	Yes
Features:	EEPROM, POR, PWM, WDT
Output Type:	Open Drain
Current - Output Source/Sink:	10mA, 25mA
Clock Frequency:	100kHz
Voltage - Supply:	3 V ~ 5.25 V
Operating Temperature:	-40°C ~ 85°C
Mounting Type:	Surface Mount
Package / Case:	48-BSSOP (0.295", 7.50mm Width)
Supplier Device Package:	48-SSOP
Base Part Number:	CY8C9540

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CY8C9540A-24PVXIT Application Field and Working PrincipleThe CY8C9540A-24PVXIT is an I/O expander, allowing a system designer to extend the number of programmable GPIOs and serial interfaces available in a compact board space. It is designed to interface and interoperate with various microcontroller and microprocessor systems such as those from Cypress, Freescale, Microchip, and Renesas.The device features an 8-bit bidirectional I/O port, 12 configurable I/O signals, two general-purpose 8-bit timers, two 8-bit pulse-width modulation (PWM) channels, and two communication interfaces—an SPI and a two-wire I2C port. The chip supports master and slave modes, allowing for bidirectional communication between up to 128 peripheral devices.The core of the CY8C9540A-24PVXIT chip is a 8-bit microcontroller, which includes a 24-bit ROM for storing instructions, up to 768 bytes of RAM for data scratchpad and a number of control registers. The chip also includes an analog comparator, which can be used to compare an external voltage with a reference voltage, as well as a clock oscillator, which can generate a clock up to 24MHz.The chip\'s I/O port can be programmed to act as either input or output signals. Each I/O port can be individually configured as either an input or output with input configurations supporting up to 4 levels of input current. A number of I/O functions can be programmed through the on-chip ROM, including analog-to-digital conversion, PWMs, timers and serial communication interfaces.The Serial Port Interface (SPI) allows users to connect up to four external devices. It supports master or slave mode communication, with speeds up to 8MHz. The two-wire interface (I2C) supports 256-byte buffers for storing data and a 7-bit addressing system for connecting multiple peripheral devices.The CY8C9540A-24PVXIT is a versatile and compact chip, allowing system designers to integrate a considerable number of additional I/O functions into very compact designs. The chip enables the implementation of complex I/O expansion applications, such as those used in data logging, infrared devices and industrial automation, where the number and types of external I/O signals have to be precisely controlled. In addition, the SPI and I2C ports allow multiple external peripheral device connections, enabling system designers to easily extend the functionality of their device. In this way, the CY8C9540A-24PVXIT provides a comprehensive solution for implementing complex I/O expansion applications.

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