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PCF8584P
I/O Controller Interface IC
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PCF8584P 數據表
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詳細說明
GENERAL DESCRIPTION The PCF8584 is an integrated circuit designed in CMOS technology which serves as an interface between most standard parallel-bus microcontrollers/microprocessors and the serial I2C-bus. The PCF8584 provides both master and slave functions. Communication with the I2C-bus is carried out on a byte-wise basis using interrupt or polled handshake. It controls all the I2C-bus specific sequences, protocol, arbitration and timing. The PCF8584 allows parallel-bus systems to communicate bidirectionally with the I2C-bus.FEATURES • Parallel-bus to I2C-bus protocol converter and interface • Compatible with most parallel-bus microcontrollers/microprocessors including 8049, 8051, 6800, 68000 and Z80 • Both master and slave functions • Automatic detection and adaption to bus interface type • Programmable interrupt vector • Multi-master capability • I2C-bus monitor mode • Long-distance mode (4-wire) • Operating supply voltage 4.5 to 5.5 V • Operating temperature range: −40 to +85 °C.
主要特徵
- Parallel-bus to I2C-bus protocol converter and interface
- Compatible with most parallel-bus microcontrollers/microprocessors including 8049, 8051, 6800, 68000 and Z80
- Both master and slave functions
- Automatic detection and adaption to bus interface type
- Programmable interrupt vector
- Multi-master capability
- I2C-bus monitor mode
- Long-distance mode (4-wire)
- Operating supply voltage 4.5 to 5.5 V
- Operating temperature range: −40 to +85 °C.
規格
以下是所選零件的基本參數，涉及零件的特性及其所屬類別。
| Rohs Code | Yes | Part Life Cycle Code | Transferred |
| Reach Compliance Code | ECCN Code | EAR99 | |
| HTS Code ! | 8542.39.00.01 | JESD-30 Code | R-PDIP-T20 |
| Number of Bits | 8 | Number of Terminals | 20 |
| Operating Temperature-Max | 85 °C | Operating Temperature-Min | -40 °C |
| Package Body Material | PLASTIC/EPOXY | Package Code | DIP |
| Package Equivalence Code | DIP20,.3 | Package Shape | RECTANGULAR |
| Package Style | IN-LINE | Power Supplies ! | 5 V |
| Qualification Status ! | Not Qualified | Supply Voltage-Nom | 5 V |
| Surface Mount ! | NO | Technology | CMOS |
| Temperature Grade ! | INDUSTRIAL | Terminal Form ! | THROUGH-HOLE |
| Terminal Pitch ! | 2.54 mm | Terminal Position | DUAL |
數據表 PDF
數據表記錄了器件的特性、絕對最大額定值、應用等，這對於作為器件特定應用的整體指南大有裨益。
常見問題解答
What is PCF8584P?
The PCF8584P is an 8-bit I2C-bus and SMBus I/O port with interrupt designed by NXP Semiconductors (formerly Philips Semiconductors). It is ideal for applications requiring simple I/O expansion and control, such as interfacing with sensors, switches, and other peripheral devices.
How Does PCF8584P Work?
The PCF8584P works by providing an 8-bit I/O port that can be controlled through the I2C-bus or SMBus interface. It allows for interfacing digital signals with the microcontroller or other devices via a simple serial communication protocol. The PCF8584P also features interrupt capabilities for efficient event handling.
How Many Pins does PCF8584P have and What are the Functions of the Pinout Configuration?
The PCF8584P is housed in a 20-pin DIP (Dual Inline Package) package. The pinout configuration includes:
- VDD: Positive power supply pin.
- VSS: Ground pin.
- SCL: Serial clock input for I2C-bus/SMBus communication.
- SDA: Serial data I/O for I2C-bus/SMBus communication.
- P0-P7: 8-bit bidirectional I/O port.
- INT: Interrupt output pin.
- A0, A1, A2: Address select pins for I2C-bus/SMBus communication.
What are the Pros and Cons of PCF8584P?
Pros:
- Simple I/O Expansion: Provides easy interfacing and control of peripheral devices through a standard serial interface.
- Interrupt Capabilities: Supports interrupt outputs for efficient event handling and system responsiveness.
- Compatibility: Works with standard I2C-bus and SMBus protocols for broad compatibility with microcontrollers and digital systems.
- Low Power Consumption: Operates with low power, suitable for battery-powered applications.
Cons:
- Low I/O Count: Limited to 8-bit I/O port, may not be suitable for applications requiring higher I/O count.
- Speed Limitation: Operates at standard I2C-bus speeds, may not be suitable for high-speed applications.
Are There Any Equivalents/Alternatives to PCF8584P for Recommendation?
- The MCP23008 from Microchip Technology provides a similar 8-bit I/O expander with I2C interface.
- An alternative to the PCF8584P is the TCA9555 from Texas Instruments, which offers 16-bit I/O expansion via I2C.
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