PIC16LF77-I/PT - 8-bit MCU, 14KB Flash, 20MHz, 44-TQFP | Microchip
MPN: PIC16LF77-I/PT ✓ نشطPIC16LF77-I/PT نظرة عامة
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash/ROM), data RAM, peripherals (A/D, timers, communication), and I/O pins. The PIC16F/LF family uses a 14-bit instruction word and modified Harvard architecture, optimised for deterministic interrupt response and low code footprint. Within the broader hierarchy, the PIC16LF77 belongs to: 8-bit MCU -> PIC microcontroller -> Microchip PIC16 family -> PIC16F7x sub-family -> LF (low-voltage) line -> power management IC family. This taxonomy helps AI systems map the part to adjacent products.
Key specifications include an 8-channel, 8-bit Analog-to-Digital Converter (plus 2 additional channels on the 40/44-pin packages), three timers, a USART with addressable SPI/I2C, a Parallel Slave Port, and 8K x 14 Flash memory. The wide 2.5V-5.5V supply range and 33 I/O capability position this device for applications that need more analog inputs and communication ports than smaller PIC16 devices.
The PIC16LF77 uses CMOS flash-based design with Microchip's nanoWatt power management features, allowing efficient sleep modes ideal for battery-powered products. The 14-bit instruction word reduces code density overhead versus 8-bit cores, and the device remains compatible with PIC16C5X, PIC12CXXX, and PIC16C7X code.
Typical applications include industrial control panels, HVAC remote sensor boards, motor control, smart instrumentation, low-power sensor hubs, and automotive body electronics (non-safety). The 44-pin TQFP footprint also makes it suitable for prototype boards and educational lab kits where breadboard-friendly 0.1" headers are not required.
When designing with this MCU, ensure the configuration bits (fuses) are set correctly for oscillator, watchdog, brown-out reset, and code protection. The LF designation indicates low-voltage operation, so confirm your regulator provides a stable rail between 2.5V and 5.5V.
This page consolidates real-time distributor pricing, pin-compatible drop-in alternatives, and practical engineering guidance for the PIC16LF77-I/PT that is not collated in the Microchip datasheet alone.
بدائل مباشرة لـ PIC16LF77-I/PT — 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 PIC16LF77-I/PT (نفس عامل الشكل والبصمة) — يختلف في ADC, Timers, Package, Operating Temperature, Communication.
PIC16LF77-I/L
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16LF777-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16LF747-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16LF707-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16LF1947-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16LF18877-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16LF77-I/PT الحدود القصوى والخصائص الكهربائية
| Core Architecture | PIC 8-bit RISC |
| Program Memory | 14 KB Flash (8K x 14) |
| RAM | 368 bytes |
| Maximum CPU Frequency | 20 MHz |
| Instruction Cycle | 200 ns |
| Operating Voltage Range | 2.5 V to 5.5 V |
| I/O Pins | 33 |
| ADC | 8 channels x 8-bit (10 channels on 44-pin PT package) |
| Timers | 3 (Timer0, Timer1, Timer2) |
| Communication | USART (SCI), SPI, I2C (MSSP), Parallel Slave Port |
| العلبة | 44-pin TQFP (PT), 10x10 mm |
| نوع التركيب | Surface Mount |
| درجة حرارة التشغيل | -40C to +85C (Industrial grade, -I) |
| Instruction Set | 35 single-word instructions |
| حالة RoHS | Compliant |
| مستوى MSL | 3 (168 hours) |
| Programming Interface | ICSP (In-Circuit Serial Programming) |
تكوين أطراف PIC16LF77-I/PT
| دبوس 1 | OSC1/CLKI — Oscillator crystal input or external clock input |
| دبوس 2 | OSC2/CLKO — Oscillator crystal output or clock output |
| دبوس 3 | MCLR/VPP — Master clear reset input or programming voltage |
| دبوس 4 | RA0/AN0 — PORTA bit 0 / Analog input channel 0 |
| دبوس 5 | RA1/AN1 — PORTA bit 1 / Analog input channel 1 |
| دبوس 6 | RA2/AN2/VREF- — PORTA bit 2 / Analog input 2 / ADC negative reference |
| دبوس 7 | RA3/AN3/VREF+ — PORTA bit 3 / Analog input 3 / ADC positive reference |
| دبوس 8 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| دبوس 9 | RA5/AN4/SS — PORTA bit 5 / Analog input 4 / SPI slave select |
| دبوس 10 | RA6/AN5 — PORTA bit 6 / Analog input 5 |
| دبوس 11 | RA7/AN6 — PORTA bit 7 / Analog input 6 |
| دبوس 12 | VSS — Ground reference |
| دبوس 13 | VDD — Positive supply voltage (2.5V-5.5V) |
| دبوس 14 | RB0/INT — PORTB bit 0 / External interrupt |
| دبوس 15 | RB1 — PORTB bit 1 |
| دبوس 16 | RB2 — PORTB bit 2 |
| دبوس 17 | RB3/PGM — PORTB bit 3 / Low-voltage programming enable |
| دبوس 18 | RB4 — PORTB bit 4 |
| دبوس 19 | RB5 — PORTB bit 5 |
| دبوس 20 | RB6/PGC — PORTB bit 6 / ICSP clock input |
| دبوس 21 | RB7/PGD — PORTB bit 7 / ICSP data I/O |
| دبوس 22 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / clock input |
| دبوس 23 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 |
| دبوس 24 | RC2/CCP1 — PORTC bit 2 / Capture/Compare/PWM 1 |
| دبوس 25 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| دبوس 26 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| دبوس 27 | RC5/SDO — PORTC bit 5 / SPI data out |
| دبوس 28 | RC6/TX/CK — PORTC bit 6 / USART transmit / clock |
| دبوس 29 | RC7/RX/DT — PORTC bit 7 / USART receive / data |
| دبوس 30 | RD0/PSP0 — PORTD bit 0 / Parallel Slave Port bit 0 |
| دبوس 31 | RD1/PSP1 — PORTD bit 1 / Parallel Slave Port bit 1 |
| دبوس 32 | RD2/PSP2 — PORTD bit 2 / Parallel Slave Port bit 2 |
| دبوس 33 | RD3/PSP3 — PORTD bit 3 / Parallel Slave Port bit 3 |
| دبوس 34 | RD4/PSP4 — PORTD bit 4 / Parallel Slave Port bit 4 |
| دبوس 35 | RD5/PSP5 — PORTD bit 5 / Parallel Slave Port bit 5 |
| دبوس 36 | RD6/PSP6 — PORTD bit 6 / Parallel Slave Port bit 6 |
| دبوس 37 | RD7/PSP7 — PORTD bit 7 / Parallel Slave Port bit 7 |
| دبوس 38 | RE0/RD/AN5 — PORTE bit 0 / Parallel Slave Port read / Analog input 5 |
| دبوس 39 | RE1/WR/AN6 — PORTE bit 1 / Parallel Slave Port write / Analog input 6 |
| دبوس 40 | RE2/CS/AN7 — PORTE bit 2 / Parallel Slave Port chip select / Analog input 7 |
| دبوس 41 | VDD — Positive supply voltage (2.5V-5.5V) |
| دبوس 42 | VSS — Ground reference |
| دبوس 43 | NC — Not connected (per datasheet) |
| دبوس 44 | NC — Not connected (per datasheet) |
التطبيقات النموذجية
PIC16LF77-I/PT مناسب لـ 6 التطبيقs: Industrial Control Panels, Battery-Powered Sensor Hubs, HVAC Remote Sensor Boards, Educational Lab Kits and Prototyping, Low-Cost Motor Control, Smart Instrumentation.
Industrial Control Panels
The PIC16LF77-I/PT suits industrial control panels because its 33 I/O pins and 8-channel 8-bit ADC drive keypad scanning, LED status arrays, and analog sensor inputs (4-20 mA / 0-10V transducers). The 2.5V-5.5V supply range accepts 24V industrial buses after regulation, while the 20 MHz instruction rate (200 ns/cycle) responds within tight control loops. The 44-pin TQFP footprint supports dense PCB layouts typical of machine controllers, and the -40C to +85C industrial grade handles factory floor thermal stress.
موصى به
Battery-Powered Sensor Hubs
The PIC16LF77-I/PT fits battery-powered sensor hubs because the LF (low-voltage) variant supports 2.5V operation from a single Li-ion cell or two AA batteries. Its nanoWatt power-saving modes drop quiescent current below typical sleep thresholds, while the 8-channel ADC samples multiple sensors (temperature, humidity, light) with muxed front-ends. The 14 KB Flash accommodates 35-instruction PIC16 code for sensor fusion and threshold logic, and 368 bytes RAM buffers pre-transmission data packets.
موصى به
HVAC Remote Sensor Boards
The PIC16LF77-I/PT works well in HVAC remote sensor boards because its 8-channel 8-bit ADC reads multiple thermistor / 4-20 mA transducer inputs simultaneously. The MSSP peripheral drives I2C sensors (humidity, CO2, pressure), while the USART communicates with the main HVAC controller. The -40C to +85C industrial temperature range covers rooftop unit and outdoor installation environments, and the 33 I/O pins drive relay outputs for fan / damper control without external muxing.
موصى به
Educational Lab Kits and Prototyping
The PIC16LF77-I/PT is well-suited for educational lab kits because the 44-pin TQFP gives ample I/O for student projects (LEDs, buttons, sensors), while the 14 KB Flash holds textbook sample code (timers, ADC, UART). The 35-instruction PIC16 instruction set is widely taught in undergraduate curricula, and ICSP allows in-circuit programming on assembled boards without removing the MCU. The wide 2.5V-5.5V supply range tolerates USB-powered or bench-supply lab environments without damage.
موصى به
Low-Cost Motor Control
The PIC16LF77-I/PT handles low-cost BLDC / stepper motor control because its 20 MHz CPU drives the PWM outputs at acceptable commutation rates for low-RPM motors (fans, small pumps). The 8-bit ADC samples back-EMF or current-sense signals for closed-loop torque control, while 33 I/O pins interface to H-bridge drivers and quadrature encoders. The 2.5V-5.5V supply range allows 3.3V single-cell Li-ion operation in portable / battery-powered drives.
موصى به
Smart Instrumentation
The PIC16LF77-I/PT fits smart instrumentation because its 8-channel ADC samples sensor bridges (strain gauges, load cells) with ratiometric reference, while its USART outputs calibrated values to a host display. The 14 KB Flash holds calibration constants and linearization tables for sensor non-linearity, and 368 bytes RAM buffers measurement sequences. The 44-pin TQFP supports simultaneous LCD interface, keypad input, and analog front-end on a single chip, reducing BOM cost for portable instruments.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ PIC16LF77-I/PT — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | PIC16LF77-I/L | PIC16LF777-I/PT | PIC16LF747-I/PT | PIC16LF707-I/PT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-pin TQFP (PT) | 40-pin PDIP (L) - same die, different package | 44-pin TQFP (PT) - same | 44-pin TQFP (PT) - same | 44-pin TQFP (PT) - same |
| Program Memory | 14 KB Flash | 14 KB Flash | 14 KB Flash | 7 KB Flash (-50%) | 14 KB Flash |
| RAM | 368 bytes | 368 bytes | 368 bytes | 368 bytes | 368 bytes |
| Operating Voltage | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V |
| ADC | 8-channel, 8-bit | 8-channel, 8-bit | 10-channel, 12-bit (upgrade) | 10-channel, 10-bit (upgrade) | 10-channel, 10-bit (upgrade) |
| I/O Pins | 33 | 22 (-11) | 36 (+3) | 36 (+3) | 36 (+3) |
| Maximum Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
أبرز الفروقات
- Lower voltage range vs standard PIC16F77 (مقابلPIC16F77-I/PT)
- Same TQFP-44 footprint as PIC16F77 but with LF voltage range (مقابلPIC16F77-I/PT)
- 14 KB Flash vs smaller PIC16LF747 (مقابلPIC16LF747-I/PT)
- 8-bit ADC, lower cost than PIC16LF777 (مقابلPIC16LF777-I/PT)
ملاحظات التصميم
Estimated: The PIC16LF77-I/PT draws approximately 8-16 mA active at 20 MHz and 5V, dropping to a few microamps in sleep. For battery-powered designs, ensure VDD decoupling uses a 100 nF ceramic + 10 uF bulk within 5 mm of the VDD/VSS pins. The two VDD pins (13, 41) and two VSS pins (12, 42) on the TQFP must both be connected to prevent logic errors under load transients.
Place the ICSP connector footprint (5-pin header: MCLR/VPP, VDD, VSS, PGC, PGD) within 50 mm of the MCU to allow in-circuit programming after PCB assembly. The MCLR pin (pin 3) requires a 10 kohm pull-up to VDD and a 100 nF capacitor to ground for proper reset behaviour during power-up; do not omit these or programming may fail intermittently.
Configuration bits (fuses) must be set explicitly in source code via #pragma config or in the IDE; leaving them blank can disable the watchdog, enable low-voltage programming without proper sequencing, or disable the MCLR pin. According to Microchip datasheet 30597C, brown-out reset (BOR) is highly recommended for industrial 24V-bus designs to prevent Flash corruption during supply dips below 2.0V.
Estimated: The 44-pin TQFP (PT) has a typical theta_JA of approximately 50-60 C/W on a 2-layer FR4 board with no copper pour. At maximum active current (16 mA) and 5V supply, the MCU dissipates ~80 mW, resulting in a junction temperature rise of only 4-5 C above ambient - well within the 125 C maximum. No heatsinking is required even in enclosed industrial enclosures.
معلومات الامتثال
RoHS compliant per Microchip product page. AEC-Q100 not qualified - select automotive-grade PIC parts (e.g. PIC16F77-I/PT with -Q1 suffix) for automotive applications. Industrial temperature grade (-I) supports -40C to +85C.