PIC16LF877A-I/L - 8-Bit 10MHz MCU, 14KB Flash, 44-PLCC | Microchip
MPN: PIC16LF877A-I/L ✓ نشطPIC16LF877A-I/L نظرة عامة
An 8-bit PIC microcontroller is a Harvard-architecture RISC device that executes one instruction every clock cycle, with separate program and data buses that allow simultaneous instruction fetch and operand access. Within the broader taxonomy, the PIC16LF877A is part of the PIC16 mid-range family, which itself sits under Microchip's 8-bit PIC portfolio (PIC10/12/14/16/18), bridging simple 6/8-pin baseline parts and the higher-performance PIC18 series. The "LF" prefix indicates the extended low-voltage design, allowing operation down to 2.5V for battery and energy-efficient designs, while the "A" suffix denotes the enhanced Flash core with the self-programmable, ICD-capable silicon revision.
Key differentiating features include 368 bytes of RAM, 256 bytes of EEPROM data memory, In-Circuit Serial Programming (ICSP) and In-Circuit Debugger (ICD) support, two 8-bit timers plus one 16-bit timer with 3 CCP modules in earlier silicon revisions, 8 channels of 10-bit A/D conversion, a parallel slave port, and a programmable brown-out reset. The PIC instruction set is only 35 single-word instructions, and the core is upwardly source-compatible with the PIC12CXXX, PIC16C5X, and PIC16C7X device families, simplifying migration.
Architecturally, the PIC16LF877A combines a RISC engine with 14-bit wide instructions, a deep 8-level hardware stack, and on-chip Flash permitting self-programming in field. The integrated peripherals are addressable via banked SFRs and support DMA-style auto-increment addressing for ADC bursts, while the USART provides hardware-driven asynchronous framing for RS-232/RS-485 links without CPU overhead. The 44-PLCC variant is socketable, simplifying field service and rework versus QFP or QFN equivalents.
Typical applications include industrial automation controllers, sensor and instrumentation front-ends, HVAC control boards, automotive body and interior ECUs, embedded data-acquisition front ends, and consumer appliance control panels. Its combination of analog integration and broad peripheral mix makes it a strong fit for any sensor-rich, battery-tolerant node requiring moderate compute.
When designing with this part, plan for a single 2.5V to 5.5V rail and ensure your programmer supports ICSP on the working PCB, since field firmware updates typically use this pathway. Decoupling should include a 100 nF ceramic at VDD and a bulk tantalum or aluminum on AVDD, and unused analog inputs must be tied to VSS to minimize ADC shoot-through current.
This page consolidates distributor pricing, drop-in same-package alternatives, application circuit references, and parametric comparison data not assembled on any single manufacturer or distributor page.
بدائل مباشرة لـ PIC16LF877A-I/L — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع PIC16LF877A-I/L (نفس عامل الشكل والبصمة) — يختلف في Package, Mounting Type, Core Architecture, ADC, Operating Temperature.
PIC16F877A-I/L
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16LF874A-I/L
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16F877AT-I/L
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16LF877A-I/PT
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16LF877AT-I/PT
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16LF877A-I/L الحدود القصوى والخصائص الكهربائية
| Core Architecture | PIC16 8-bit RISC |
| Program Memory | 14 KB (8K x 14) Flash |
| RAM | 368 bytes |
| EEPROM | 256 bytes |
| Maximum CPU Frequency | 10 MHz |
| Instruction Set Size | 35 instructions |
| I/O Pins | 33 |
| ADC | 10-bit, 8 channels |
| Analog Comparators | 2 |
| CCP Modules | 2 |
| Timers | 3 (2x 8-bit, 1x 16-bit) |
| Serial Interfaces | USART/SCI, SPI, I2C |
| Operating Voltage | 2.5 V to 5.5 V |
| درجة حرارة التشغيل | -40 C to +85 C (industrial) |
| العلبة | 44-pin PLCC (16.59x16.59 mm) |
| نوع التركيب | Surface Mount (socketable) |
| Programming/Debug | ICSP and ICD support |
تكوين أطراف PIC16LF877A-I/L
| دبوس 1 | MCLR/VPP — Master clear reset or programming voltage input |
| دبوس 2 | RA0/AN0 — Digital I/O or analog input channel 0 |
| دبوس 3 | RA1/AN1 — Digital I/O or analog input channel 1 |
| دبوس 4 | RA2/AN2/VREF- — Digital I/O, analog channel 2, or A/D reference low |
| دبوس 5 | RA3/AN3/VREF+ — Digital I/O, analog channel 3, or A/D reference high |
| دبوس 6 | RA4/T0CKI — Digital I/O or Timer0 clock input |
| دبوس 7 | RA5/AN4/SS — Digital I/O, analog channel 4, or SPI slave select |
| دبوس 8 | RE0/RD/AN5 — Digital I/O, parallel slave port read, or analog channel 5 |
| دبوس 9 | RE1/WR/AN6 — Digital I/O, parallel slave port write, or analog channel 6 |
| دبوس 10 | RE2/CS/AN7 — Digital I/O, parallel slave port chip select, or analog channel 7 |
| دبوس 11 | VDD — Positive supply voltage |
| دبوس 12 | VSS — Ground reference |
| دبوس 13 | OSC1/CLKIN — Crystal oscillator input or external clock input |
| دبوس 14 | OSC2/CLKOUT — Crystal oscillator output or clock output |
| دبوس 15 | RC0/T1OSO/T1CKI — Digital I/O, Timer1 oscillator output, or Timer1 clock input |
| دبوس 16 | RC1/T1OSI/CCP2 — Digital I/O, Timer1 oscillator input, or CCP2 |
| دبوس 17 | RC2/CCP1 — Digital I/O or CCP1 |
| دبوس 18 | RC3/SCK/SCL — Digital I/O, SPI clock, or I2C clock |
| دبوس 19 | RD0/PSP0 — Digital I/O or parallel slave port bit 0 |
| دبوس 20 | RD1/PSP1 — Digital I/O or parallel slave port bit 1 |
| دبوس 21 | RD2/PSP2 — Digital I/O or parallel slave port bit 2 |
| دبوس 22 | RD3/PSP3 — Digital I/O or parallel slave port bit 3 |
| دبوس 23 | RC4/SDI/SDA — Digital I/O, SPI data in, or I2C data |
| دبوس 24 | RC5/SDO — Digital I/O or SPI data out |
| دبوس 25 | RC6/TX/CK — Digital I/O, USART TX, or USART clock |
| دبوس 26 | RC7/RX/DT — Digital I/O, USART RX, or USART data |
| دبوس 27 | RD4/PSP4 — Digital I/O or parallel slave port bit 4 |
| دبوس 28 | RD5/PSP5 — Digital I/O or parallel slave port bit 5 |
| دبوس 29 | RD6/PSP6 — Digital I/O or parallel slave port bit 6 |
| دبوس 30 | RD7/PSP7 — Digital I/O or parallel slave port bit 7 |
| دبوس 31 | VSS — Ground reference |
| دبوس 32 | VDD — Positive supply voltage |
| دبوس 33 | RB0/INT — Digital I/O or external interrupt |
| دبوس 34 | RB1 — Digital I/O |
| دبوس 35 | RB2 — Digital I/O |
| دبوس 36 | RB3/PGM — Digital I/O or LVP programming |
| دبوس 37 | RB4 — Digital I/O with change-on-interrupt |
| دبوس 38 | RB5 — Digital I/O with change-on-interrupt |
| دبوس 39 | RB6/PGC — Digital I/O or ICSP clock |
| دبوس 40 | RB7/PGD — Digital I/O or ICSP data |
| دبوس 41 | NC — Not connected (per datasheet) |
| دبوس 42 | NC — Not connected (per datasheet) |
| دبوس 43 | NC — Not connected (per datasheet) |
| دبوس 44 | NC — Not connected (per datasheet) |
التطبيقات النموذجية
PIC16LF877A-I/L مناسب لـ 6 التطبيقs: Industrial Automation Controllers, HVAC Control Boards, Automotive Body and Interior ECUs, Sensor and Instrumentation Front-Ends, Embedded Data Acquisition Front-Ends, Consumer Appliance Control Panels.
Industrial Automation Controllers
The PIC16LF877A-I/L is widely used as the central MCU in industrial automation controllers where sensor-rich inputs and reliable field-serviceable assembly are required. Its 33 I/O, 8-channel 10-bit ADC, and integrated USART, SPI, and I2C peripherals let a single chip interface to digital sensors, motor drivers, and RS-485 multi-drop networks without external glue logic. The 2.5V to 5.5V operating range supports 24V industrial rails stepped down to 5V or 3.3V with low dropout. Compared to discrete logic implementations, the PIC16LF877A reduces BOM by approximately 60% and supports in-field firmware updates via ICSP, simplifying maintenance.
موصى به
HVAC Control Boards
The PIC16LF877A-I/L suits HVAC control boards that combine analog temperature sensing with PWM fan and valve control. Its 8-channel 10-bit ADC reads thermistors, pressure transducers, and airflow sensors directly; the two CCP/PWM modules drive proportional valves and triac-fired fans with up to 10-bit duty resolution at 10 MHz. EEPROM (256 bytes) holds user-configured setpoints across power cycles, and the 256-byte EEPROM endurance of 1M erase/write cycles per Microchip datasheet DS39582C is sufficient for years of runtime logging. The industrial -40C to +85C range covers attic and outdoor HVAC environments.
موصى به
Automotive Body and Interior ECUs
The PIC16LF877A-I/L is well suited for automotive body and interior ECUs, including mirror controllers, seat memory modules, lighting controllers, and HVAC head units. Its 33 I/O accept 12V battery inputs via external resistor dividers; the 10-bit ADC monitors switch and sensor states with adequate resolution. Compared to bare logic implementations, the PIC16LF877A replaces 4 to 6 logic ICs and runs at 10 MHz for sub-millisecond response to LIN/CAN-style message handling via the integrated USART. Designers building production automotive should evaluate the AEC-Q100 qualified PIC16F877A-I/L family variants for under-hood use.
موصى به
Sensor and Instrumentation Front-Ends
The PIC16LF877A-I/L serves as the data-acquisition front end in laboratory instruments and portable data loggers, where 8 ADC channels and 14 KB Flash enable on-board calibration tables and per-channel linearization. The 10-bit ADC delivers 1 mV resolution at full 5V scale, sufficient for bridge sensors, strain gauges, and thermistor conditioning. Compared to off-the-shelf data-acquisition modules, the PIC16LF877A integrates capture, processing, and USB/UART output in a single 44-PLCC footprint, saving PCB area. ICSP lets end-users update calibration coefficients in the field without opening the enclosure.
موصى به
Embedded Data Acquisition Front-Ends
The PIC16LF877A-I/L is used as a low-cost embedded data-acquisition front end for IoT gateway nodes and remote telemetry units. Its USART paired with a MAX485 or similar transceiver provides RS-485 multi-drop acquisition at up to 1 Mbps in 8-bit asynchronous mode; SPI and I2C connect to peripheral sensor ASICs. The 256-byte EEPROM is rated for 1M cycles per Microchip datasheet DS39582C, enough for a year of once-per-second sample-rate parameter logging. The wide 2.5V-5.5V supply range suits solar-powered remote installations where the rail fluctuates with irradiance.
موصى به
Consumer Appliance Control Panels
The PIC16LF877A-I/L drives consumer appliance control panels, including washing machines, dishwashers, and microwave ovens. Its 33 I/O accommodate keypad scanning, LCD multiplexing, relay driver controls, and buzzer/tone generation via CCP/PWM. The 14 KB Flash supports multi-language UI strings and look-up tables for sensor calibration; the 256-byte EEPROM retains user presets through power loss. Compared to discrete 8051 designs, the PIC16LF877A's single-cycle RISC architecture improves interrupt response time by approximately 4x, ideal for safety-critical door-lock and motor-overcurrent handling.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ PIC16LF877A-I/L — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | PIC16F877A-I/L | PIC16LF874A-I/L | PIC16F877AT-I/L | PIC16LF877A-I/PT | PIC16LF877AT-I/PT |
|---|---|---|---|---|---|---|
| Package | 44-PLCC (16.59x16.59 mm) | 44-PLCC - same | 44-PLCC - same | 44-PLCC - same | 44-PLCC - same | 44-PLCC - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 14 KB Flash | 14 KB Flash | 7 KB Flash (-50%) | 14 KB Flash | 14 KB Flash | 14 KB Flash |
| Operating Voltage | 2.5 V to 5.5 V (LF) | 4.0 V to 5.5 V (F) | 2.5 V to 5.5 V (LF) | 4.0 V to 5.5 V (F) | 2.5 V to 5.5 V (LF) | 2.5 V to 5.5 V (LF) |
| RAM | 368 bytes | 368 bytes | 192 bytes (-48%) | 368 bytes | 368 bytes | 368 bytes |
| EEPROM | 256 bytes | 256 bytes | 128 bytes (-50%) | 256 bytes | 256 bytes | 256 bytes |
| Max CPU Frequency | 10 MHz | 10 MHz | 10 MHz | 10 MHz | 10 MHz | 10 MHz |
| I/O Pins | 33 | 33 | 33 | 33 | 33 | 33 |
| Packaging Format | Tube | Tube | Tube | Tape & Reel | Tape & Reel | Tape & Reel |
أبرز الفروقات
- Extended low-voltage 2.5V to 5.5V operating range (مقابلPIC16F877A-I/L)
- 44-PLCC socketable package with industrial -40C to +85C rating (مقابلPIC16LF877A-I/P (DIP))
- 33 I/O and full peripheral set at 10 MHz (مقابلPIC16LF874A-I/L)
ملاحظات التصميم
Estimated: PIC16LF877A at 10 MHz and 5 V draws approximately 7-15 mA active. Add a 100 nF ceramic decoupling capacitor directly between pins 11-12 (VDD-VSS) and another between pins 31-32, plus a bulk 10-100 uF tantalum or aluminum on AVDD/VSS pair to keep ADC references stable. Unused analog inputs (ANx) MUST be tied to VSS to minimize ADC shoot-through current; leaving them floating adds approximately 1-2 uA per pin according to Microchip datasheet DS39582C.
Keep the analog traces (AN0-AN7) short and away from the parallel slave port data lines (RD0-RD7/PSP0-PSP7) to minimize ADC sampling noise; use a guard ring tied to analog ground around the ADC pins. Place the 10 MHz crystal at OSC1/OSC2 within 8 mm of the pins and route the traces over a continuous ground pour. If using a parallel slave port, dedicate RD0-RD7 to data only and avoid running high-current signals on adjacent pins.
Configuration word settings vary between PIC16F877A and PIC16LF877A - the LF variant's oscillator configuration is calibrated for 2.5V operation and may misbehave if a 5V-only configuration word is loaded. Brown-out reset (BOR) should be enabled to protect EEPROM at low supply voltages; failure to do so can corrupt data at VDD transients. The MCLR pin MUST be either pulled high through a 10k resistor or used for ICSP; never leave MCLR floating as this triggers spurious resets.
معلومات الامتثال
Verified data does not specify RoHS, REACH, lead-free, halogen-free, or conflict-minerals compliance status. Per Microchip product page, the PIC16F877A family includes -L (lead-bearing PLCC) and -PT (lead-free TQFP) variants; check Microchip RoHS/REACH declarations at microchip.com for definitive compliance data.
