PIC16LF874-04/P - 8-bit 4MHz PIC MCU, 7KB Flash, 40-PDIP | Microchip
MPN: PIC16LF874-04/P ✓ Hoạt độngPIC16LF874-04/P Tóm tắt
A PIC microcontroller (Programmable Interface Controller) is an 8-bit RISC-based microcontroller built on Harvard architecture, widely used in embedded control. The PIC16F family sits between baseline PIC10/12/16 and the higher-end PIC18 in Microchip's portfolio, offering enhanced peripherals such as analog-to-digital converters, PWM modules, and multiple serial interfaces while remaining code-compatible with smaller 14-bit instruction PICs. PIC MCUs are part of the broader category of microcontrollers, which fall under microprocessors and embedded processors in the semiconductor taxonomy.
Key features of the PIC16LF874-04/P include 7KB of self-programmable Flash program memory, 128 bytes of EEPROM data memory, three I/O ports (PORTA, PORTB, PORTE), a 10-bit ADC with up to 8 channels, two 8-bit timers and one 16-bit timer, and serial communication peripherals including I2C, SPI, and USART. The 14-bit instruction word and 35 single-word instruction set simplify code development and field upgrades.
Architecturally, the PIC16LF874-04/P uses a RISC pipeline with a 2-stage instruction fetch/execute model and a 14-bit program word. Brown-out reset (BOR), power-on reset (POR), watchdog timer (WDT) and a 10-bit ADC with internal voltage reference support mixed-signal embedded designs without external analog components.
Typical applications include industrial control, HVAC systems, remote sensors, automotive body electronics, and general-purpose embedded controllers. The 40-pin PDIP package makes this part especially attractive for prototyping, breadboarding, and through-hole production runs where socketed replacement is desired.
When designing with this device, note that the 4MHz speed grade limits instruction throughput to 1 MIPS. For higher-performance tasks, upgrade to the PIC16LF874-20/P (20MHz, 5 MIPS). The low-voltage core requires decoupling capacitors near VDD/AVDD/AVSS and proper PCB grounding.
This page synthesizes distributor pricing, drop-in same-package alternatives from the PIC16F/LF874 family, and practical design notes not aggregated on the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho PIC16LF874-04/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 PIC16LF874-04/P (cùng hình factor và footprint) — khác nhau ở Core, Mounting Type, Package, Program Memory (Flash), Instruction Set.
PIC16LF874-04I/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LF874A-04/P
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16F874-04/PQ
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LF874-10/P
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16LF874-20/P
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16LF877-04/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LF874-04/P Tỷ lệ tối đa & tính chất điện
| Product Family | PIC PIC® 16F |
| Core | 8-bit RISC PIC16 |
| Core Architecture | Harvard |
| Instruction Set Width | 14-bit |
| Number of Instructions | 35 single-word |
| Maximum CPU Frequency | 4 MHz |
| Program Memory (Flash) | 7 KB (4K x 14) |
| Data RAM | 192 bytes |
| Data EEPROM | 128 bytes |
| I/O Pins | 33 |
| ADC | 10-bit, 8 channels |
| Timers | Two 8-bit + one 16-bit |
| Communication Interfaces | I2C, SPI, USART (UART) |
| Operating Voltage Range | 2.0 V to 5.5 V |
| Hộp | 40-pin PDIP |
| Kiểu lắp đặt | Through-Hole (THT) |
| Temperature Grade | Commercial |
| Brown-Out Reset | Yes |
| Watchdog Timer | Yes |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC16LF874-04/P
| Chân 1 | MCLR/VPP — Master Clear (reset) input / programming voltage |
| Chân 2 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| Chân 3 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| Chân 4 | RA2/AN2/VREF- — PORTA bit 2 / analog input 2 / ADC VREF- |
| Chân 5 | RA3/AN3/VREF+ — PORTA bit 3 / analog input 3 / ADC VREF+ |
| Chân 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Chân 7 | RA5/AN4/SS — PORTA bit 5 / analog input 4 / SPI slave select |
| Chân 8 | RE0/RD/AN5 — PORTE bit 0 / parallel port read / analog input 5 |
| Chân 9 | RE1/WR/AN6 — PORTE bit 1 / parallel port write / analog input 6 |
| Chân 10 | RE2/CS/AN7 — PORTE bit 2 / parallel port chip select / analog input 7 |
| Chân 11 | VDD — Positive digital supply voltage |
| Chân 12 | VSS — Digital ground |
| Chân 13 | OSC1/CLKIN — Oscillator input / external clock input |
| Chân 14 | OSC2/CLKOUT — Oscillator output / clock output |
| Chân 15 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / clock input |
| Chân 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / Capture/Compare/PWM 2 |
| Chân 17 | RC2/CCP1 — PORTC bit 2 / Capture/Compare/PWM 1 |
| Chân 18 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Chân 19 | RD0/PSP0 — PORTD bit 0 / parallel slave port bit 0 |
| Chân 20 | RD1/PSP1 — PORTD bit 1 / parallel slave port bit 1 |
| Chân 21 | RD2/PSP2 — PORTD bit 2 / parallel slave port bit 2 |
| Chân 22 | RD3/PSP3 — PORTD bit 3 / parallel slave port bit 3 |
| Chân 23 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Chân 24 | RC5/SDO — PORTC bit 5 / SPI data out |
| Chân 25 | RC6/TX/CK — PORTC bit 6 / USART TX / clock |
| Chân 26 | RC7/RX/DT — PORTC bit 7 / USART RX / data |
| Chân 27 | RD4/PSP4 — PORTD bit 4 / parallel slave port bit 4 |
| Chân 28 | RD5/PSP5 — PORTD bit 5 / parallel slave port bit 5 |
| Chân 29 | RD6/PSP6 — PORTD bit 6 / parallel slave port bit 6 |
| Chân 30 | RD7/PSP7 — PORTD bit 7 / parallel slave port bit 7 |
| Chân 31 | VSS — Digital ground |
| Chân 32 | VDD — Positive digital supply voltage |
| Chân 33 | RB0/INT — PORTB bit 0 / external interrupt |
| Chân 34 | RB1 — PORTB bit 1 |
| Chân 35 | RB2 — PORTB bit 2 |
| Chân 36 | RB3/PGM — PORTB bit 3 / low-voltage programming |
| Chân 37 | RB4 — PORTB bit 4 |
| Chân 38 | RB5 — PORTB bit 5 |
| Chân 39 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Chân 40 | RB7/PGD — PORTB bit 7 / ICSP data |
Ứng dụng tiêu biểu
PIC16LF874-04/P phù hợp cho 7 Áp dụngs: Industrial Control and Automation, HVAC and Building Automation, Remote Sensors and Battery-Powered Nodes, Automotive Body Electronics (Non-Safety), General-Purpose Embedded Controllers, Educational and Training Platforms, Appliance Control and White Goods.
Industrial Control and Automation
The PIC16LF874-04/P's 7KB Flash, 192 bytes RAM, 33 I/O pins, and 10-bit ADC make it well suited to industrial control loops and machine automation. Its 2.0V-5.5V operating range, brown-out reset, and watchdog timer support reliable operation in factory environments where supply transients and EMI are common. The I2C/SPI/USART peripherals connect directly to sensors, motor drivers, and HMI displays, while the 40-PDIP package simplifies through-hole assembly in legacy industrial designs and field-serviceable controllers.
Được đề xuất
HVAC and Building Automation
The PIC16LF874-04/P fits HVAC and building-automation applications where its 8-bit PIC16 RISC core and 10-bit ADC drive temperature, humidity, and pressure sensors. The 35-instruction 14-bit instruction set simplifies firmware development for thermostat logic, damper control, and valve actuation. USART and I2C interfaces connect to wireless modules, BACnet bridges, or Modbus slaves, and the 40-PDIP through-hole package is convenient for thermostat and controller housings that may require socketed MCU replacement.
Được đề xuất
Remote Sensors and Battery-Powered Nodes
The PIC16LF874-04/P's LF low-voltage core (2.0V-5.5V) and 192-byte RAM make it a strong fit for remote wireless sensor nodes operating from two AA cells or a single Li-ion cell. The 4MHz speed grade limits active current draw while preserving compute capability for sensor sampling and basic radio stack control. Brown-out reset and the integrated watchdog prevent firmware lockups in unattended field installations, and the 40-PDIP package is friendly to lab prototypes before moving to QFN surface-mount.
Được đề xuất
Automotive Body Electronics (Non-Safety)
Non-safety automotive body modules such as lighting controllers, mirror adjusters, and accessory multiplexers historically use the PIC16LF874-04/P due to its 8-bit predictability, integrated ADC for current sensing, and USART for LIN-bus bit-banged slave nodes. The 'LF' voltage range tolerates load-dump transients when paired with external regulation. Note that this part is not AEC-Q100 qualified; for safety applications choose the PIC16F874A-I/P industrial-grade variant and add automotive-grade external components.
Được đề xuất
General-Purpose Embedded Controllers
The PIC16LF874-04/P serves as a versatile general-purpose 8-bit controller for educational kits, hobby projects, retro-computing builds, and small-batch industrial products. Its 35-instruction RISC architecture and generous 33 I/O pins support everything from LED chasers to stepper-motor drivers. The 40-PDIP package is breadboard-friendly and supports ICSP (In-Circuit Serial Programming) for iterative development. 7KB of Flash accommodates moderate firmware with USB stack, sensor fusion, or basic TCP/IP over external modules.
Được đề xuất
Educational and Training Platforms
The PIC16LF874-04/P is widely used in university microcontroller courses, training labs, and certification programs because the PIC16 instruction set is well documented in textbooks and the 40-PDIP package fits standard development boards. Its 7KB Flash holds moderate example projects (LED matrix, UART communication, ADC sampling) while the integrated peripherals teach bus-protocol fundamentals. MPLAB X IDE and XC8 compiler support is mature, with abundant example code from Microchip's application library.
Được đề xuất
Appliance Control and White Goods
The PIC16LF874-04/P drives white-goods controllers in washing machines, dishwashers, microwave ovens, and small kitchen appliances where a proven 8-bit core and 40-PDIP serviceability are required. The 10-bit ADC reads temperature sensors, water-level probes, and motor-current feedback; PWM modules control triac-fired heaters and small universal motors; and USART interfaces to LED display or inverter boards. The LF voltage range tolerates rectified mains rails after step-down regulation.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16LF874-04/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 | PIC16LF874-04I/P | PIC16LF874A-04/P | PIC16F874-04/P | PIC16LF874-10/P | PIC16LF874-20/P |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 40-PDIP | 40-PDIP - same | 40-PDIP - same | 40-PDIP - same | 40-PDIP - same | 40-PDIP - same |
| Maximum CPU Frequency | 4 MHz (1 MIPS) | 4 MHz (1 MIPS) | 4 MHz (1 MIPS) | 4 MHz (1 MIPS) | 10 MHz (2.5 MIPS) | 20 MHz (5 MIPS) |
| Operating Voltage Range | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 4.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V |
| Program Memory (Flash) | 7 KB | 7 KB | 7 KB | 7 KB | 7 KB | 7 KB |
| Data RAM | 192 bytes | 192 bytes | 192 bytes | 192 bytes | 192 bytes | 192 bytes |
| I/O Pins | 33 | 33 | 33 | 33 | 33 | 33 |
| Temperature Grade | Commercial (0C to +70C) | Industrial (-40C to +85C) | Commercial | Commercial | Commercial | Commercial |
| Silicon Revision | Original (non-A) | Original (non-A) | Revision A | Original (non-A) | Original (non-A) | Original (non-A) |
Bảo phân biệt quan trọng
- Low-voltage LF core supports 2.0V-5.5V operation (vsPIC16F874-04/P)
- Higher performance option exists in same package (vsPIC16LF874-04/P)
- Industrial temperature variant for harsh environments (vsPIC16LF874A-04/P)
- Silicon A revision with improved ADC and oscillator options (vsPIC16LF874-04/P)
Ghi chú thiết kế
Decouple VDD/VSS (pins 11/12 and 31/32) and AVDD/AVSS (separate analog supply on the die, brought to VDD/VSS in this PDIP package per datasheet) with 100nF ceramic capacitors placed within 5mm of the MCU pins, plus a 10uF tantalum or aluminum bulk capacitor on the supply rail. Brown-out reset (BOR) is enabled by configuration fuse and prevents code execution when VDD falls below the BOR threshold (~4V for F variant, ~2.5V for LF variant), protecting EEPROM and ensuring defined startup.
Never leave the MCLR/VPP pin floating; tie it to VDD through a 10kohm resistor or drive it from a supervisor/reset IC. The PIC16F874 cannot tolerate MCLR floating because the internal weak pull-up is disabled by configuration fuse. Also, do not exceed the 4MHz oscillator specification on the '-04' speed grade - PIC16F874 maximum is 20MHz. Mismatched clock configuration register values are the most common firmware hang on this part.
For the 40-PDIP package, route the high-current switching outputs (CCP1, CCP2 PWM) and the USART lines (RC6/RC7) away from the oscillator pins (OSC1/OSC2) and the analog inputs (RA0-RA5/RE0-RE2) to minimize coupling. Place the crystal or resonator within 10mm of OSC1/OSC2 with grounded guard traces. The Parallel Slave Port (PORTD + PORTE) should remain traces short if used, or left unconnected if PSP is unused in firmware.
ICSP programming requires access to MCLR/VPP, RB6/PGC, RB7/PGD, VDD, and VSS on the production PCB. According to Microchip's ICSP layout guidelines, place a 2x5 header or test points on these signals so that the PICkit programmer can attach without removing the MCU from the board. The PGC/PGD traces should be short (<50mm) and not share vias with switching signals to ensure reliable programming at production temperatures.
At the maximum 4MHz clock with all peripherals active, the PIC16LF874-04/P draws approximately 2-5 mA from VDD. Power dissipation is therefore <30 mW - the 40-PDIP package easily handles this with theta_JA of ~50 C/W and no heatsinking required. However, in designs with high I/O sink current (e.g., direct LED drive), verify that total port-pin current does not exceed the 200 mA absolute maximum per port and 500 mA for the device.
Thông tin tuân thủ
RoHS and lead-free per Microchip product page. Not AEC-Q100 qualified; the PIC16F874A-I/P industrial-grade variant is the typical upgrade for harsh-temperature designs. Halogen-free status not explicitly stated in the verified data.
