PIC16LF874-04/L - 8-bit 4MHz MCU, 7KB Flash, 44-PLCC | Microchip
MPN: PIC16LF874-04/L ✓ Hoạt độngPIC16LF874-04/L Tóm tắt
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash/ROM), working memory (RAM), data EEPROM, and peripheral interfaces on one silicon die. PIC microcontrollers use a Harvard RISC architecture that separates program and data buses, allowing instruction fetch and data access to occur in the same clock cycle. Within the broader semiconductor taxonomy, a PIC16F MCU belongs to: 8-bit microcontroller -> microcontroller -> embedded processor -> semiconductor IC. The 'F' suffix specifically indicates Flash-based program memory (reprogrammable in-circuit), and 'LF' denotes the low-voltage Flash variant.
Key features include 14-bit instruction word width, 35 instructions, 8-level hardware stack, integrated 10-bit multi-channel analog-to-digital converter, USART, MSSP (SPI/I2C) port, capture/compare/PWM modules, and a watchdog timer with its own on-chip RC oscillator. The 44-PLCC package provides more I/O pins than the 28-pin SPDIP alternative while remaining socket-compatible with a wide range of legacy and industrial sockets, simplifying field replacement.
Typical applications include industrial control boards, sensor signal conditioning, motor-control interfaces, automotive body electronics, and educational embedded platforms. The PIC16F874 family has a long industry presence with mature toolchain support (MPLAB X IDE, XC8 compiler, ICD programmers).
When designing with this device, pay attention to the 2.0V minimum supply voltage and ensure brown-out and watchdog reset paths are configured. For high-noise industrial environments, add decoupling capacitors (100 nF ceramic + 10 uF bulk) close to VDD/AVDD/VSS/AVSS pins and follow Microchip's PCB layout guidelines for mixed-signal ground separation.
This page synthesizes distributor pricing from DigiKey/Mouser/LCSC, drop-in PIC16LF874 family alternatives in the same 44-PLCC footprint, and practical design notes drawn from Microchip's published reference designs, providing information not duplicated on the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho PIC16LF874-04/L — 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/L (cùng hình factor và footprint) — khác nhau ở Package, Core Architecture, Instruction Set, Program Memory Size, ADC.
PIC16LF874-04I/L
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LF874A-I/L
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LF874T-04I/L
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16LF877-04/L
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16LF874-04/L Tỷ lệ tối đa & tính chất điện
| Core | PIC16 8-bit RISC |
| Instruction Set | 14-bit, 35 instructions |
| Tần số xung maksimum | 4 MHz |
| Program Memory (Flash) | 7 KB (4K x 14) |
| Data SRAM | 192 bytes |
| Data EEPROM | 128 bytes |
| I/O Pins | 33 |
| ADC | 10-bit, multi-channel |
| Điện áp cung cấp hoạt động | 2.0 V to 5.5 V |
| Khoảng nhiệt độ hoạt động | 0 C to +70 C (commercial) |
| Hộp | 44-PLCC (16.59 x 16.59 mm) |
| Kiểu lắp đặt | SMD/SMT (J-bend) |
| Bề rộng đường dữ liệu | 8 bit |
| Communication Interfaces | USART, MSSP (SPI/I2C) |
| Peripherals | CCP, WDT, BOR, 10-bit ADC |
Cấu hình chân PIC16LF874-04/L
| 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 — PORTA bit 2 / analog input 2 |
| Chân 5 | RA3/AN3/VREF — PORTA bit 3 / analog input 3 / voltage reference |
| 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 / read control / analog input 5 |
| Chân 9 | RE1/WR/AN6 — PORTE bit 1 / write control / analog input 6 |
| Chân 10 | RE2/CS/AN7 — PORTE bit 2 / chip select / analog input 7 |
| Chân 11 | VDD — Positive supply voltage |
| Chân 12 | VSS — Ground reference |
| 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 / Timer1 clock input |
| Chân 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 |
| 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 transmit / clock |
| Chân 26 | RC7/RX/DT — PORTC bit 7 / USART receive / 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 — Ground reference |
| Chân 32 | VDD — Positive 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 / LVP programming |
| Chân 37 | RB4 — PORTB bit 4 |
| Chân 38 | RB5 — PORTB bit 5 |
| Chân 39 | RB6/PGC — PORTB bit 6 / ICD clock |
| Chân 40 | RB7/PGD — PORTB bit 7 / ICD data |
| Chân 41 | AVDD — Analog positive supply voltage |
| Chân 42 | AVSS — Analog ground reference |
| Chân 43 | NC — Not connected (per datasheet) |
| Chân 44 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
PIC16LF874-04/L phù hợp cho 6 Áp dụngs: Industrial Control Boards, Sensor Signal Conditioning Hubs, Motor Control Interfaces, Educational Embedded Platforms, Automotive Body Electronics, Legacy Equipment Drop-In Replacement.
Industrial Control Boards
The PIC16LF874-04/L is widely deployed in industrial control boards, where its 33 I/O pins can drive relays, opto-isolators, and discrete logic. With 10-bit ADC accuracy and 2.0 V to 5.5 V operation, it handles 4-20 mA sensor loops and 24 V industrial buses via level shifters. Engineers choose this part for its mature toolchain, watchdog timer, and proven long-term availability in factory automation PLCs and panel meters.
Được đề xuất
Sensor Signal Conditioning Hubs
In sensor-conditioning subsystems, the PIC16LF874-04/L's 8-channel 10-bit ADC reads multiple analog sensors (temperature, pressure, flow) and converts them to digital values for the host. The PIC16F87x family's hardware USART and MSSP (SPI/I2C) peripherals enable direct communication with modern sensor ICs without external glue logic. With 7 KB Flash, the firmware easily fits calibration tables, linearization routines, and digital filtering algorithms for sensor fusion.
Được đề xuất
Motor Control Interfaces
The PIC16LF874-04/L integrates Capture/Compare/PWM (CCP) modules suitable for brushed-DC and stepper motor drive sequencing, with feedback from Hall-effect sensors read through the 10-bit ADC. The 4 MHz clock and 35-instruction RISC core execute PWM update loops with deterministic timing. Designers frequently combine this MCU with external H-bridge drivers and current-sense amplifiers; the 44-PLCC package allows socketed prototyping for tuning motor-control firmware.
Được đề xuất
Educational Embedded Platforms
Universities and training labs have used the PIC16F874 family for decades because of its simple architecture, low cost, and the free MPLAB XC8 compiler. The PIC16LF874-04/L is a good teaching vehicle for Harvard architecture, interrupts, ADC, and PWM topics. With 7 KB Flash, students can fit meaningful projects (thermostat, line-following robot, I2C sensor reader) without external memory, and the 44-PLCC socket simplifies hardware debugging.
Được đề xuất
Automotive Body Electronics
In non-safety automotive body modules (window lift, seat control, lighting), the PIC16LF874-04/L's 33 I/O and 10-bit ADC interface with switches, lamps, and motor position sensors. The wide 2.0-5.5 V supply tolerates automotive load-dump events when paired with proper TVS/EMC protection. For under-hood or AEC-Q100-mandated applications, designers migrate to AEC-Q100-qualified PIC16F1xxx variants; otherwise, the standard LF device is widely accepted in cabin modules.
Được đề xuất
Legacy Equipment Drop-In Replacement
The PIC16LF874-04/L serves as a drop-in maintenance replacement for legacy industrial and medical equipment that originally used the PIC16F874 or PIC16LF874 silicon in a 44-PLCC socket. With identical pinout and 7 KB Flash, field engineers can swap a failed MCU without firmware changes, restoring service quickly. The PLCC socket also permits easy removal for off-board firmware update via a programmer.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16LF874-04/L — 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/L | PIC16LF874A-I/L | PIC16LF874T-04I/L | PIC16LF877-04/L |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-PLCC (16.59x16.59 mm) | 44-PLCC - same | 44-PLCC - same | 44-PLCC - same | 44-PLCC - same |
| Program Memory (Flash) | 7 KB (4K x 14) | 7 KB | 7 KB | 7 KB | 8 KB (+14%) |
| Data SRAM | 192 bytes | 192 bytes | 192 bytes | 192 bytes | 256 bytes (+33%) |
| Maximum Clock Frequency | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| Operating Supply Voltage | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V |
| Operating Temperature | 0 C to +70 C (commercial) | -40 C to +85 C (industrial) | -40 C to +85 C (industrial) | -40 C to +85 C (industrial) | 0 C to +70 C |
| ADC Resolution | 10-bit | 10-bit | 10-bit (improved) | 10-bit | 10-bit |
Bảo phân biệt quan trọng
- 44-PLCC socket-compatible package (vsPIC16LF877-04/P (40-pin PDIP))
- Wide 2.0 V to 5.5 V supply range (vsPIC16F874 (non-LF, 4.5 V to 5.5 V only))
- 10-bit ADC with 8 channels and USART/MSSP (vsPIC16F84A (no ADC, no USART))
Ghi chú thiết kế
Place a 100 nF decoupling capacitor as close as possible to each VDD pin (11 and 32) and a 10 uF bulk tantalum or ceramic capacitor on the same supply trace. Connect AVSS (pin 42) to VSS (pin 31) at a single star-ground point under the IC to prevent ADC ground bounce. For battery-powered designs, take advantage of the wide 2.0-5.5 V supply range to operate directly from a single 3.3 V LDO without level shifting.
Keep analog traces (PORTA, PORTE) short and away from switching signals or PWM outputs on PORTC. Use a guard ring tied to AVSS around sensitive analog input traces if high source-impedance sensors are used. Reserve the MCLR/VPP pin (1) accessible to the programming header so the device can be re-flashed without desoldering. The 44-PLCC package is socket-compatible, simplifying field service.
Do not leave the MCLR pin floating - tie it to VDD through a 10 kohm pull-up so that unintended resets do not occur. Always enable the watchdog timer (WDTE configuration fuse) for unattended or industrial firmware to recover from code deadlocks. The ICD pins RB6/PGD and RB7/PGC must not be used as general-purpose outputs in production firmware; reserve them for the debugger or leave them as inputs with weak pull-ups.
Thông tin tuân thủ
RoHS-compliant lead-free PLCC packaging per Microchip environmental declarations. The standard 'L' suffix is commercial temperature grade, not AEC-Q100 qualified; for automotive designs, choose PIC16F1xxx AEC-Q100 parts or validate under your automotive QMS.
