PIC16F74-I/L - 8-Bit 20MHz Flash MCU | Microchip Technology
MPN： PIC16F74-I/L ✗ 停產PIC16F74-I/L 概覽
A PIC microcontroller is an embedded-processing IC that combines a CPU core, program memory, data memory, peripherals, and I/O in one device. The PIC16 family uses a compact RISC-oriented instruction architecture, and the PIC16F74 provides 35 single-word instructions according to the manufacturer product documentation. Its 200 ns instruction execution capability supports deterministic control tasks, while the 8-bit architecture is well suited to sensor reading, actuator control, communication, and industrial automation.
Key features include an 8-channel 8-bit analog-to-digital converter, two additional timers, two capture/compare/PWM functions, and a synchronous serial port configurable as 3-wire SPI or 2-wire I2C. The device also includes a USART, 192 bytes of RAM according to the distributor listing, and up to 33 I/O according to the Mouser listing. These peripherals reduce the need for external converters, communication controllers, timers, and logic in embedded products.
The PIC16F74-I/L operates from a 20 MHz maximum device clock and uses Flash program memory, allowing in-system reprogramming and supporting firmware updates. Its 44-PLCC footprint provides 33 I/O pins, making it useful where multiple discrete digital connections are required. The PLCC package is a surface-mount leaded package intended for higher pin-count embedded-control boards and legacy industrial equipment.
Typical applications include industrial control systems, data acquisition modules, instrumentation, motor and relay control, communication interfaces, and legacy embedded products. The integrated ADC is valuable for monitoring analog sensors, while SPI, I2C, and USART options allow connection to displays, transceivers, memories, and external peripherals. Timer and PWM resources support periodic control functions such as scanning, dimming, actuator timing, and signal generation.
When designing a replacement or new board, verify the 44-pin PLCC footprint, pin names, oscillator requirements, programming interface, reset behavior, and peripheral configuration. The I/L package designation should be confirmed against the manufacturer datasheet before layout release. This page combines distributor specifications, manufacturer feature information, package details, sourcing links, and application guidance for engineering evaluation.
直接替換替代品，適用於 PIC16F74-I/L — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： PIC16F74-I/L （相同外形與佔位） — 差異在於 Package, Core Architecture, Timers, Program Memory Size, Instruction Cycle Time.
PIC16F74-I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC16F74T-E/L
✅ 直接替換聯絡詢價
查看資料表 →PIC16LF874A-I/L
✅ 直接替換聯絡詢價
查看資料表 →PIC16F74-I/L 最大額定值與電氣特性
| Product Type | 8-bit CMOS Flash PIC microcontroller |
| Architecture | PIC architecture |
| 最大時脈頻率 | 20 MHz |
| Program Memory | 7 KB Flash (4K x 14) |
| RAM | 192 bytes |
| I/O Pins | 33 |
| Analog-to-Digital Converter | 8 channels, 8-bit resolution |
| Timers | 2 additional timers |
| Capture/Compare/PWM Functions | 2 |
| Synchronous Serial Port | 3-wire SPI or 2-wire I2C |
| USART | Universal Asynchronous Receiver Transmitter |
| Instruction Set | 35 single-word instructions |
| Instruction Execution | 200 ns |
| 封裝 | 44-PLCC, 16.59 mm x 16.59 mm |
| 安裝類型 | Surface mount |
PIC16F74-I/L 44-plcc, 16.59 mm x 16.59 mm 腳位配置指南
PIC16F74-I/L（44-plcc, 16.59 mm x 16.59 mm 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： PIC16F74-I/L.
請參閱 資料表 以查看完整腳位配置。
典型應用
PIC16F74-I/L 適用於 6 應用s: Industrial Control Systems, Data Acquisition and Instrumentation, Motor and Relay Control, Communication Interfaces, Legacy Embedded Products, LED and Display Control.
Industrial Control Systems
The PIC16F74-I/L fits industrial control boards that need local decision-making, digital I/O, analog monitoring, and serial connectivity in one device. Its 33 I/O pins can connect discrete inputs, relay drivers, status indicators, and field interfaces, while the 8-channel 8-bit ADC supports monitoring of sensor outputs. The 20 MHz clock and 200 ns instruction execution provide a basis for deterministic control loops. Before deployment, verify the device's supply-voltage limits and temperature range against the factory environment.
推薦
Data Acquisition and Instrumentation
The PIC16F74-I/L is appropriate for measurement panels requiring several analog inputs and programmable digital outputs without a separate ADC controller. The 8-channel 8-bit ADC can sample sensors, potentiometers, dividers, and process inputs, while the SPI or I2C serial port can connect displays, memory, or measurement front ends. Its Flash program memory supports field firmware configuration. Designers should define input voltage limits, sampling timing, calibration storage, and isolation requirements before finalizing the analog front end.
推薦
Motor and Relay Control
The PIC16F74-I/L can act as the supervisory controller for small motor, valve, relay, or actuator systems. Its timer resources and capture/compare/PWM functions help produce periodic timing or pulse-width-control signals, while the 33 available I/O pins support status inputs and driver-control outputs. The USART can report operating state to a host system, and the ADC can monitor feedback signals. The final design must include suitable driver transistors, flyback protection, current limits, and safe-state behavior.
推薦
Communication Interfaces
The PIC16F74-I/L is suitable for embedded serial bridges and protocol nodes because its synchronous serial port can operate as SPI or I2C and its USART supports asynchronous serial links. These resources allow one controller to manage a sensor network, display, EEPROM, radio module, or host interface while handling local control logic. The 20 MHz device clock supports efficient protocol servicing, but the designer must verify baud-rate timing, pull-up requirements, isolation, and connector requirements.
推薦
Legacy Embedded Products
The PIC16F74-I/L is a practical choice for maintaining or reproducing older embedded equipment where the existing design uses a PIC16F74 and a 44-PLCC footprint. Its 7 KB Flash memory, 192 bytes of RAM, 33 I/O pins, ADC, timers, and serial peripherals preserve the established PIC16 family control model. A migration or replacement program should verify software timing, configuration words, oscillator behavior, programming voltage, and every package pin. Existing firmware may still operate, but electrical and lifecycle review remains necessary.
推薦
LED and Display Control
The PIC16F74-I/L can coordinate LED indicators, multiplexed displays, and status panels because it combines multiple I/O pins, timers, PWM-related functions, and serial interface options. The ADC can support brightness or ambient-light control inputs, while SPI or I2C can connect to display drivers and expanders. Firmware can implement sequencing, dimming, fault indication, and keypad scanning. The electrical design should account for LED current limits, driver topology, bus capacitance, and the voltage requirements of the selected display module.
推薦
推薦產品摘要
工程參考資料，適用於 PIC16F74-I/L — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | PIC16F74-I/PT | PIC16F74T-E/L | PIC16LF874A-I/L |
|---|---|---|---|---|
| Package | 44-PLCC | 44-PLCC package option | 44-PLCC package option | 44-PLCC package option |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
主要差異化特點
- Integrated mixed-signal and communication resources (對比PIC16LF874A-I/L)
- High I/O availability for embedded control (對比PIC16F74-I/PT)
- 20 MHz Flash-based control platform (對比PIC16F74T-E/L)
設計說明
Before placing the device, confirm the exact 44-PLCC footprint and pin numbering against the manufacturer package drawing. The verified distributor data confirms the 44-PLCC package and 16.59 mm x 16.59 mm body size, but it does not provide a complete pin table. Preserve the required lead pattern, exposed component clearance, soldering profile, and programming access. Do not infer pin functions from a similarly named PLCC device.
Validate the PIC16F74-I/L supply-voltage range, oscillator configuration, reset requirements, and peripheral current limits against the manufacturer datasheet before power-up. The verified data does not provide the operating supply voltage, so it is intentionally not guessed. Use local decoupling near the device and route power and ground returns consistently. Confirm that any external ADC, transceiver, display, or actuator drivers do not exceed the device pin ratings.
Do not treat a related PIC16F74 suffix or a same-package family member as an automatic drop-in replacement. The supplied cross-reference results identify PIC16F74-I/PT, PIC16F74T-E/L, and PIC16LF874A-I/L as comparison candidates, but they do not establish identical pinout, speed grade, temperature grade, memory, peripheral behavior, or programming compatibility. Review the exact ordering code and compare every electrical and pin parameter before substitution.
合規資訊
The supplied verified data does not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. These fields remain unknown rather than assumed.
