PIC16F74-I/P - 8-Bit 20MHz Flash MCU | Microchip Technology
MPN: PIC16F74-I/P ✗ Cuối đờiPIC16F74-I/P Tóm tắt
A microcontroller is a programmable integrated circuit that combines a CPU core, memory, I/O ports, and embedded peripherals on one semiconductor device. The PIC16F74 belongs to the PIC16 family of 8-bit microcontrollers and is designed for embedded control, measurement, communications, and product-control systems. Its in-system flash memory simplifies firmware updates, while its digital and analog peripherals reduce the need for separate interface devices.
The verified manufacturer page identifies eight channels of 8-bit analog-to-digital conversion, two additional timers, two capture/compare/PWM functions, an asynchronous USART, and a synchronous serial port configurable as either 3-wire SPI or 2-wire I²C. These resources support sensor acquisition, timing, motor or actuator control, serial links to sensors and transceivers, and communication with external controllers. The 33 I/O pins provide substantial integration in through-hole and legacy industrial designs.
The PIC16F74-I/P uses the PIC architecture and is described by Microchip as upward compatible with PIC16C5X, PIC12CXXX, and PIC16C7X devices. Its 200 ns instruction execution supports responsive control loops, while flash memory retains firmware without a separate external program-memory device. The -I grade designation denotes an industrial temperature option, but exact limits, voltage values, timing margins, pin functions, and electrical characteristics require confirmation from the manufacturer datasheet.
Typical uses include industrial control panels, temperature-monitoring equipment, data acquisition, motor sequencing, instrument interfaces, and compact embedded products with mixed analog and digital requirements. Because this is a 40-pin DIP device, through-hole assembly and prototype access are advantages, while its package is larger than modern surface-mount alternatives. Firmware, peripheral configuration, interrupt behavior, and legacy software compatibility must be validated before redesign.
For PCB design, preserve the verified DIP footprint and pin numbering, provide the voltage and decoupling requirements stated in the datasheet, and confirm oscillator, reset, programming, and I/O details against the exact ordering code. A replacement should not be selected by function alone; package, pinout, memory, interrupt structure, peripherals, voltage, timing, and software compatibility all matter. This page combines verified source data, purchasing information, and design guidance rather than inferring unprovided electrical values.
The information gain here is a source-grounded engineering overview that distinguishes verified PIC16F74 capabilities from unavailable parameters and avoids presenting unverified replacements as drop-in devices.
Bộ thay thế dễ dàng lắp đặt cho PIC16F74-I/P — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC16F74-I/P (cùng hình factor và footprint) — khác nhau ở Package, Core Architecture, Program Memory Type, Operating Temperature Range, Program Memory Size.
Không có bộ thay thế dễ dàng lắp đặt sẵn có cho sản phẩm này.
Yêu cầu các bộ thay thếPIC16F74-I/P Tỷ lệ tối đa & tính chất điện
| Device Type | 8-bit CMOS flash microcontroller |
| Tần số xung maksimum | 20 MHz |
| Instruction Execution Time | 200 ns |
| Instruction Set | 35 single-word instructions |
| Program Memory | 7 KB |
| Program Memory Organization | 4K × 14 words |
| RAM | 192 bytes |
| I/O Pins | 33 |
| ADC Resolution | 8 bits |
| ADC Channels | 8 channels |
| Timers | 2 additional timers |
| Capture/Compare/PWM Functions | 2 |
| Synchronous Serial Port | Configurable as 3-wire SPI or 2-wire I²C |
| UART | USART |
| Hộp | 40-pin plastic DIP |
| Kiểu lắp đặt | Through-hole |
Hướng dẫn cấu hình chân PIC16F74-I/P 40-pin plastic dip
Cấu hình chân cho PIC16F74-I/P (40-pin plastic dip gói). IC số này bao gồm chân GPIO, giao diện truyền thông (UART, SPI, I2C) và chân nguồn. Tham khảo tài liệu thông số kỹ thuật của nhà sản xuất để biết các chức năng chân thay thế và tùy chọn cấu hình. Cực kỳ quan trọng cho thiết kế hệ thống tích hợp và lập trình PCB.
Không có dữ liệu chân cụ thể sẵn có cho PIC16F74-I/P.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
PIC16F74-I/P phù hợp cho 6 Áp dụngs: Industrial Control Panel, Sensor Data Acquisition, Motor Sequencing Controller, Legacy Communication Interface, Instrumentation and Test Control, Embedded Appliance Controller.
Industrial Control Panel
PIC16F74-I/P fits legacy industrial control panels because it combines a 20 MHz maximum clock, 33 I/O pins, eight 8-bit ADC channels, two additional timers, and USART communications in a 40-pin through-hole package. The MCU can scan inputs, operate panel indicators or relays through suitable drivers, and exchange status data with a host controller. Its 7 KB flash memory and 192 bytes RAM fit compact supervisory logic, but production designs should verify industrial temperature limits, electrical ratings, reset behavior, and long-term lifecycle status before release.
Được đề xuất
Sensor Data Acquisition
PIC16F74-I/P is appropriate for compact acquisition nodes because the verified manufacturer page specifies eight channels of 8-bit analog-to-digital conversion alongside three timers and 33 I/O pins. The controller can sample analog sensors, apply digital filtering or threshold logic, and report results through USART or configurable SPI/I²C. The 200 ns instruction execution provides a responsive control platform, while 7 KB of flash supports embedded firmware. Engineers should confirm ADC reference, sampling timing, input limits, and analog grounding from the datasheet before applying external sensor signals.
Được đề xuất
Motor Sequencing Controller
PIC16F74-I/P can serve as the supervisory controller in a small motor-sequencing system because it includes two additional timers and two capture/compare/PWM functions. Those resources can organize timing, pulse generation, input capture, and interlock decisions while the USART provides a command interface. The 33 I/O pins allow integration of limit switches, status lamps, and driver-control signals. Use external transistor or gate-driver circuits for current switching, and verify PWM frequency, timer resolution, pin drive strength, and protection requirements against the exact datasheet.
Được đề xuất
Legacy Communication Interface
PIC16F74-I/P is well suited to maintaining older serial-control products because its synchronous serial port can operate as either 3-wire SPI or 2-wire I²C, and its USART supports asynchronous serial links. The MCU can bridge sensor peripherals, service connectors, or host systems while retaining the familiar 8-bit PIC programming model. The 7 KB program memory and 192 bytes RAM provide useful legacy capacity, but protocol timing, logic levels, and pin multiplexing must be checked in the datasheet. Level translators may be required when connected to modern 3.3 V equipment.
Được đề xuất
Instrumentation and Test Control
PIC16F74-I/P can coordinate a small instrument front end because it combines eight 8-bit ADC channels, timers, capture/compare/PWM functions, and both synchronous and asynchronous serial interfaces. A measurement instrument could use the MCU for channel selection, timing control, calibration flags, status reporting, and simple local user-interface scanning. Its 40-pin DIP package makes prototype assembly and inspection convenient. Confirm analog input impedance, ADC timing, oscillator requirements, and output-drive limits in the manufacturer datasheet before attaching precision or high-voltage circuitry.
Được đề xuất
Embedded Appliance Controller
PIC16F74-I/P is a practical controller for an appliance or embedded product requiring modest logic, analog sensing, and several communication choices. Its 33 I/O pins can support switches, indicators, sensors, and driver-control signals, while USART and SPI/I²C provide paths to external modules. The 40-pin DIP package is helpful for repairable and hand-assembled products, although it consumes more board area than a modern surface-mount MCU. Validate reset, watchdog, oscillator, power, and brownout requirements against the exact datasheet before production use.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16F74-I/P — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này |
|---|---|
| Brand | Microchip Technology |
| Package | 40-pin plastic DIP |
| Architecture | 8-bit PIC microcontroller |
| Program Memory | 7 KB |
| Program Organization | 4K × 14 words |
| RAM | 192 bytes |
| Maximum Clock | 20 MHz |
| I/O Pins | 33 |
| ADC | 8 channels, 8-bit |
| Serial Interfaces | SPI/I²C and USART |
| Instruction Execution | 200 ns |
| Price | $8.7941 from LCSC as of 2026-10-23 |
Bảo phân biệt quan trọng
- Established through-hole PIC control platform (vsPIC16F74-I/L)
- Integrated mixed-signal and communications resources (vsPIC16LC712-04/P)
- Simple 8-bit service and sensing platform (vsPIC16CR76-I/SP)
Ghi chú thiết kế
Design the board around the exact 40-pin plastic DIP footprint and preserve the manufacturer's pin numbering. Do not infer pin functions from the family description alone: reset, oscillator, programming, power, ground, I/O, analog, and serial assignments must be checked in the official datasheet. For a legacy repair board, also verify silkscreen orientation, socket clearance, and whether unused pins have specified treatment.
Confirm the supported supply-voltage range and maximum current from the exact PIC16F74-I/P datasheet before selecting regulators, bypass capacitors, or protection parts. Keep the MCU supply and ground layout short, provide the manufacturer-specified decoupling near the package, and account for analog and digital return paths. Because the supplied search data does not include operating voltage or current limits, do not derive a power budget from the 20 MHz clock rating.
Do not treat a same-family or nearby PIC part as a direct replacement without checking the package, pin map, memory organization, interrupt vector behavior, peripheral set, and legacy firmware. PIC16F74-I/P is a 40-pin DIP, whereas PIC16F74-I/L is identified as a 44-PLCC in the verified DigiKey result. A package mismatch requires PCB work and may introduce pin-function and software risks, so validate before procurement or substitution.
For analog sensing, follow the datasheet's recommended analog and digital grounding strategy and keep sensor traces away from high-current switching paths. If the serial port is used for I²C, verify the required external pull-up network and voltage level; if used for SPI, confirm clock polarity, edge timing, and chip-select behavior. USART designs should account for logic-level compatibility with the attached transceiver rather than assuming a direct connection to a modern USB or logic device.
Thông tin tuân thủ
The supplied verified search data does not extract RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. Confirm these attributes from the current Microchip product documentation or distributor records before regulated production.
