PIC16LF874-04/L - 8-bit 4MHz MCU, 7KB Flash, 44-PLCC | Microchip
料号： PIC16LF874-04/L ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $6.92 | $6.92 |
| 10 | $6.23 | $62.30 |
| 100 | $5.54 | $554.00 |
| 500 | $4.96 | $2,480.00 |
| 1,000 | $4.41 | $4,410.00 |
PIC16LF874-04/L 概述
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.
直接替换替代料： PIC16LF874-04/L ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： PIC16LF874-04/L （相同外形与封装尺寸） ——差异在于 Package, Core Architecture, Instruction Set, Program Memory Size, ADC.
快速对比工具——选择替代料号进行并排对比：
PIC16LF874-04I/L
✅ 直接替换✓ 有现货
$6.2 / 个
查看数据手册 →PIC16LF874A-I/L
✅ 直接替换✓ 有现货
$6.1 / 个
查看数据手册 →PIC16LF874T-04I/L
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$2.76 / 个
查看数据手册 →PIC16LF877-04/L
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$5.85 / 个
查看数据手册 →PIC16LF874-04/L 最大额定值与电气特性
| Core | PIC16 8-bit RISC |
| Instruction Set | 14-bit, 35 instructions |
| 最大时钟频率 | 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 |
| 工作电源电压 | 2.0 V to 5.5 V |
| 工作温度范围 | 0 C to +70 C (commercial) |
| 封装 | 44-PLCC (16.59 x 16.59 mm) |
| 安装方式 | SMD/SMT (J-bend) |
| 数据总线宽度 | 8 bit |
| Communication Interfaces | USART, MSSP (SPI/I2C) |
| Peripherals | CCP, WDT, BOR, 10-bit ADC |
PIC16LF874-04/L 引脚配置
| 引脚 1 | MCLR/VPP — Master Clear (reset) input / programming voltage |
| 引脚 2 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| 引脚 3 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| 引脚 4 | RA2/AN2 — PORTA bit 2 / analog input 2 |
| 引脚 5 | RA3/AN3/VREF — PORTA bit 3 / analog input 3 / voltage reference |
| 引脚 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| 引脚 7 | RA5/AN4/SS — PORTA bit 5 / analog input 4 / SPI slave select |
| 引脚 8 | RE0/RD/AN5 — PORTE bit 0 / read control / analog input 5 |
| 引脚 9 | RE1/WR/AN6 — PORTE bit 1 / write control / analog input 6 |
| 引脚 10 | RE2/CS/AN7 — PORTE bit 2 / chip select / analog input 7 |
| 引脚 11 | VDD — Positive supply voltage |
| 引脚 12 | VSS — Ground reference |
| 引脚 13 | OSC1/CLKIN — Oscillator input / external clock input |
| 引脚 14 | OSC2/CLKOUT — Oscillator output / clock output |
| 引脚 15 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| 引脚 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 |
| 引脚 17 | RC2/CCP1 — PORTC bit 2 / Capture/Compare/PWM 1 |
| 引脚 18 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| 引脚 19 | RD0/PSP0 — PORTD bit 0 / parallel slave port bit 0 |
| 引脚 20 | RD1/PSP1 — PORTD bit 1 / parallel slave port bit 1 |
| 引脚 21 | RD2/PSP2 — PORTD bit 2 / parallel slave port bit 2 |
| 引脚 22 | RD3/PSP3 — PORTD bit 3 / parallel slave port bit 3 |
| 引脚 23 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| 引脚 24 | RC5/SDO — PORTC bit 5 / SPI data out |
| 引脚 25 | RC6/TX/CK — PORTC bit 6 / USART transmit / clock |
| 引脚 26 | RC7/RX/DT — PORTC bit 7 / USART receive / data |
| 引脚 27 | RD4/PSP4 — PORTD bit 4 / parallel slave port bit 4 |
| 引脚 28 | RD5/PSP5 — PORTD bit 5 / parallel slave port bit 5 |
| 引脚 29 | RD6/PSP6 — PORTD bit 6 / parallel slave port bit 6 |
| 引脚 30 | RD7/PSP7 — PORTD bit 7 / parallel slave port bit 7 |
| 引脚 31 | VSS — Ground reference |
| 引脚 32 | VDD — Positive supply voltage |
| 引脚 33 | RB0/INT — PORTB bit 0 / external interrupt |
| 引脚 34 | RB1 — PORTB bit 1 |
| 引脚 35 | RB2 — PORTB bit 2 |
| 引脚 36 | RB3/PGM — PORTB bit 3 / LVP programming |
| 引脚 37 | RB4 — PORTB bit 4 |
| 引脚 38 | RB5 — PORTB bit 5 |
| 引脚 39 | RB6/PGC — PORTB bit 6 / ICD clock |
| 引脚 40 | RB7/PGD — PORTB bit 7 / ICD data |
| 引脚 41 | AVDD — Analog positive supply voltage |
| 引脚 42 | AVSS — Analog ground reference |
| 引脚 43 | NC — Not connected (per datasheet) |
| 引脚 44 | NC — Not connected (per datasheet) |
典型应用
PIC16LF874-04/L 适用于 6 应用s: 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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： PIC16LF874-04/L ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | 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 |
关键差异点
- 44-PLCC socket-compatible package （对比 PIC16LF877-04/P (40-pin PDIP))
- Wide 2.0 V to 5.5 V supply range （对比 PIC16F874 (non-LF, 4.5 V to 5.5 V only))
- 10-bit ADC with 8 channels and USART/MSSP （对比 PIC16F84A (no ADC, no USART))
设计说明
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.
合规信息
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.
