PIC16LF77T-I/L - 8-Bit 20MHz 14KB Flash MCU | Microchip | PLCC-44
MPN: PIC16LF77T-I/L ✓ Hoạt độngPIC16LF77T-I/L Tóm tắt
What is a PIC16 microcontroller? A PIC16 is an 8-bit RISC microcontroller from Microchip's mid-range (PIC14/16) family - a 'reduced instruction set' CPU with 35 single-word instructions, hardware multiplier on the 'F77' sub-family, 14-bit instruction word, and a Harvard architecture that separates program and data memory. Within the broader taxonomy, the PIC16LF77 sits under PIC16 mid-range -> PIC12/16/18 8-bit -> 8-bit microcontroller -> microcontroller -> embedded processor -> semiconductor. It is widely used as a stepping stone between PIC12 baseline parts and PIC18 enhanced parts, providing moderate performance with low cost.
The PIC16LF77T-I/L features 8-channel 8-bit ADC, two 8-bit timer/counters plus one 16-bit timer/counter, a Synchronous Serial Port (SSP) supporting SPI and I2C, a Universal Synchronous Asynchronous Receiver Transmitter (USART), a Capture/Compare/PWM (CCP) module, and 256 bytes of EEPROM data memory. Its 8-bit Harvard core with hardware multiply enables efficient C and assembly code generation, while 14-bit instruction width gives compact code density.
Typical applications include industrial control and sensor interfacing, automotive body electronics, home appliance control boards, low-power battery instrumentation, and embedded controls requiring ADC and serial connectivity. The wide 2.0 V to 5.5 V range and low-power 'LF' silicon also support portable and battery-backed systems.
When designing with this part, note that PIC16F77 mid-range devices use the same pinout across 40-pin DIP and 44-pin PLCC packages, but the I/O count differs - verify that 33 I/O pins are sufficient for your design. The 'T' suffix indicates tape and reel packaging, while 'I' denotes the industrial -40C to +85C temperature grade.
This page synthesizes distributor pricing from DigiKey and Mouser, drop-in alternatives across Microchip's mid-range family, and practical design notes not found on a single manufacturer page - making it a one-stop decision guide for engineers selecting an 8-bit MCU for new designs or legacy migrations.
Bộ thay thế dễ dàng lắp đặt cho PIC16LF77T-I/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 PIC16LF77T-I/L (cùng hình factor và footprint) — khác nhau ở Package, ADC, Operating Temperature, Timers, CCP Modules.
PIC16LF77-I/L
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LF74-I/L
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LF77T-I/L Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC16 mid-range 8-bit RISC |
| Instruction Set | 35 single-word instructions (14-bit wide) |
| Program Memory (Flash) | 14 KB (8K x 14) |
| RAM | 368 bytes |
| EEPROM Data Memory | 256 bytes |
| Maximum CPU Frequency | 20 MHz (200 ns instruction cycle) |
| Operating Voltage Range (LF) | 2.0 V to 5.5 V |
| I/O Pins | 33 |
| ADC | 8-channel, 8-bit |
| Timers | 2 x 8-bit + 1 x 16-bit |
| Serial Interfaces | USART, SSP (SPI / I2C) |
| CCP Modules | 1 (Capture/Compare/PWM) |
| Hộp | PLCC-44 (16.59 x 16.59 mm) |
| Nhiệt độ hoạt động | -40C to +85C (industrial grade 'I') |
| Packaging | Tape and Reel ('T' suffix) |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC16LF77T-I/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 / ADC reference positive |
| 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 | AVSS — Analog ground |
| Chân 9 | AVDD — Analog positive supply |
| Chân 10 | VSS — Digital ground |
| Chân 11 | VDD — Digital positive supply |
| Chân 12 | OSC1/CLKI — Oscillator crystal input / external clock in |
| Chân 13 | OSC2/CLKO — Oscillator crystal output / clock out |
| Chân 14 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| Chân 15 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 |
| Chân 16 | RC2/CCP1 — PORTC bit 2 / Capture Compare PWM 1 |
| Chân 17 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Chân 18 | RD0/PSP0 — PORTD bit 0 / Parallel Slave Port bit 0 |
| Chân 19 | RD1/PSP1 — PORTD bit 1 / Parallel Slave Port bit 1 |
| Chân 20 | RD2/PSP2 — PORTD bit 2 / Parallel Slave Port bit 2 |
| Chân 21 | RD3/PSP3 — PORTD bit 3 / Parallel Slave Port bit 3 |
| Chân 22 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Chân 23 | RC5/SDO — PORTC bit 5 / SPI data out |
| Chân 24 | RC6/TX/CK — PORTC bit 6 / USART transmit / USART clock |
| Chân 25 | RC7/RX/DT — PORTC bit 7 / USART receive / USART data |
| Chân 26 | RD4/PSP4 — PORTD bit 4 / Parallel Slave Port bit 4 |
| Chân 27 | RD5/PSP5 — PORTD bit 5 / Parallel Slave Port bit 5 |
| Chân 28 | RD6/PSP6 — PORTD bit 6 / Parallel Slave Port bit 6 |
| Chân 29 | RD7/PSP7 — PORTD bit 7 / Parallel Slave Port bit 7 |
| Chân 30 | VSS — Digital ground |
| Chân 31 | VDD — Digital positive supply |
| Chân 32 | RB0/INT — PORTB bit 0 / external interrupt |
| Chân 33 | RB1 — PORTB bit 1 |
| Chân 34 | RB2 — PORTB bit 2 |
| Chân 35 | RB3/PGM — PORTB bit 3 / low-voltage programming |
| Chân 36 | RB4 — PORTB bit 4 |
| Chân 37 | RB5 — PORTB bit 5 |
| Chân 38 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Chân 39 | RB7/PGD — PORTB bit 7 / ICSP data |
| Chân 40 | RE0/RD/AN5 — PORTE bit 0 / read control / analog input 5 |
| Chân 41 | RE1/WR/AN6 — PORTE bit 1 / write control / analog input 6 |
| Chân 42 | RE2/CS/AN7 — PORTE bit 2 / chip select / analog input 7 |
| Chân 43 | NC — Not connected (per datasheet) |
| Chân 44 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
PIC16LF77T-I/L phù hợp cho 6 Áp dụngs: Industrial Sensor Interface Board, Automotive Body Electronics Module, Home Appliance Control Board, Battery-Powered Data Logger, HVAC Thermostat and Zone Controller, Educational and Hobbyist Embedded Platform.
Industrial Sensor Interface Board
The PIC16LF77T-I/L fits industrial sensor interface boards because its 8-channel 8-bit ADC, 33 I/O pins, and 2.0 V to 5.5 V operating range (LF silicon) cover the typical analog-front-end plus digital-control block for 4-20 mA loop, thermistor, and bridge-sensor conditioning. Its 14 KB flash holds the calibration tables and protocol state machine for Modbus RTU or HART stacks. Running at 20 MHz with a 200 ns instruction cycle, the part can poll 8 sensors at sub-millisecond rates while maintaining UART response. Place the MCU between the sensor conditioning op-amps and the RS-485 transceiver. Use a 10 uF tantalum plus 0.1 uF ceramic on VDD, and a ferrite bead on AVSS/AVDD to isolate analog noise from the digital switching noise of the USART. Per the Microchip PIC16F7X datasheet, the LF silicon provides brown-out detect and low-power sleep for battery-backed sensor nodes.
Được đề xuất
Automotive Body Electronics Module
The PIC16LF77T-I/L supports automotive body modules such as lighting controllers, door modules, and seat controllers where moderate processing, PWM, and serial comms are required without the cost of a 32-bit MCU. Its 33 I/O pins drive multiple LED drivers, the CCP module provides PWM dimming, and the 2.0 V to 5.5 V 'LF' range tolerates automotive cranking transients down to ~6 V regulated rails. Note that this part is NOT AEC-Q100 qualified - for AEC-Q100 automotive, choose PIC16F77-I/L automotive variants or the PIC16F1939 family. The 14 KB flash accommodates CAN or LIN protocol stacks plus state-machine logic. Per the Microchip PIC16F7X datasheet (DS30391E), the -40C to +85C industrial temperature grade suits under-dash and cabin environments.
Được đề xuất
Home Appliance Control Board
The PIC16LF77T-I/L is well-suited for washing-machine, dishwasher, and microwave front-panel controllers where cost dominates and the application requires a user interface (LEDs, switches), a small display driver, and relay/triac switching logic. The 33 I/O pins connect to a 4x4 keypad matrix, a multiplexed 7-segment display, and 8 to 16 triac outputs. The 14 KB flash holds appliance state-machine firmware and EEPROM 256 bytes store user settings (cycle, temperature). The 2.0 V to 5.5 V LF silicon keeps the MCU alive across line-voltage brown-outs. Per the Microchip PIC16F7X datasheet, the SSP (SPI / I2C) interface drives LED drivers and EEPROM memories, and the USART supports diagnostic or Wi-Fi module comms for smart-appliance variants.
Được đề xuất
Battery-Powered Data Logger
The PIC16LF77T-I/L fits battery-powered data loggers because its 'LF' silicon (2.0 V to 5.5 V) extends runtime from a 3.6 V lithium primary cell down to 2.0 V cut-off, and its low-power sleep modes minimize quiescent draw between ADC samples. With 14 KB flash it can hold a small RTOS or a polling scheduler; 368 bytes RAM buffers sensor bursts; 256 bytes EEPROM stores calibration constants across power cycles. The 8-channel 8-bit ADC reads battery voltage plus 7 environmental sensors (temperature, humidity, pressure). Per the Microchip PIC16F7X datasheet (DS30391E), the watchdog timer and brown-out reset protect log integrity during battery sag, and the USART interfaces to an external Bluetooth or LoRa radio for offload.
Được đề xuất
HVAC Thermostat and Zone Controller
The PIC16LF77T-I/L works in residential and light-commercial HVAC thermostats where it must read temperature/humidity sensors, drive an LCD or OLED, control relays and TRIACs for HVAC stages, and provide user interface (buttons, encoder, BLE option). The 33 I/O pins handle 4 to 6 relay outputs plus a 4x4 keypad plus an LCD interface; the ADC reads onboard NTC plus remote temperature probes; the USART drives a Wi-Fi/BLE module for cloud-connected thermostats. The 14 KB flash accommodates scheduling firmware (7-day, 4 periods per day), EEPROM 256 bytes store user schedules across power cycles, and the 'LF' 2.0 V to 5.5 V range keeps RTC alive during brief brown-outs. Per the Microchip PIC16F7X datasheet, the CCP module generates PWM for variable-speed fan control.
Được đề xuất
Educational and Hobbyist Embedded Platform
The PIC16LF77T-I/L remains popular in university embedded-systems courses and hobbyist projects because the PIC16 mid-range architecture has the simplest instruction set (35 instructions), abundant free tutorials, and full MPLAB X IDE + XC8 compiler support. Students can program 14 KB of flash with C code, exercise the 8-channel ADC for sensor labs, drive the CCP PWM for motor-speed control, and use the USART + SSP for serial protocol labs. The 44-pin PLCC is breadboard-friendly with PLCC-to-DIP adapters, while the LF silicon's 2.0 V to 5.5 V range lets students power from 2x AA cells. Per the Microchip PIC16F7X datasheet (DS30391E), the PICkit 3 / PICkit 4 programmer/debugger supports in-circuit programming and debugging across the entire PIC16F7X family, making this part an excellent teaching vehicle.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16LF77T-I/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 | PIC16LF77-I/L | PIC16LF74-I/L | PIC16LF747-I/PT |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | PLCC-44 (16.59 x 16.59 mm) | PLCC-44 (same) | PLCC-44 (same) | TQFP-44 (different) |
| Core Architecture | PIC16 mid-range 8-bit | PIC16 mid-range 8-bit | PIC16 mid-range 8-bit | PIC16 mid-range 8-bit |
| Program Memory (Flash) | 14 KB | 14 KB | 7 KB | 7 KB |
| RAM | 368 bytes | 368 bytes | 192 bytes | 192 bytes |
| I/O Pins | 33 | 33 | 22 | 36 |
| ADC | 8-channel, 8-bit | 8-channel, 8-bit | 5-channel, 8-bit | 14-channel, 8-bit |
| Operating Voltage (LF) | 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 |
| Maximum Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
Bảo phân biệt quan trọng
- Lower-voltage LF silicon variant (vsPIC16F77-I/L)
- Higher flash and I/O count vs PIC16LF74 (vsPIC16LF74-I/L)
- 8-channel ADC vs 5-channel on PIC16LF74 (vsPIC16LF74-I/L)
Ghi chú thiết kế
The PIC16LF77T-I/L 'LF' silicon operates from 2.0 V to 5.5 V. Apply a 10 uF bulk + 0.1 uF ceramic decoupling pair within 5 mm of VDD (pin 11 and pin 31), and a separate 0.1 uF + 10 uF pair on AVDD (pin 9). Tie AVSS (pin 8) to VSS with a ferrite bead for ADC accuracy. Per the Microchip PIC16F7X datasheet, brown-out reset (BOR) and low-voltage programming (LVP) defaults may need configuration word adjustments.
The 44-pin PLCC footprint uses 1.27 mm pitch pads on a 16.59 x 16.59 mm body. Reserve a 4-layer PCB stack with continuous ground plane under the MCU for low EMI. Keep the crystal (or resonator) within 5 mm of OSC1/OSC2 (pins 12 and 13); ground the crystal case to the digital ground plane with a short bond. Trace MCLR (pin 1) directly to the reset network - keep this trace short and away from switching nodes to avoid spurious resets.
Common pitfalls with PIC16LF77T-I/L: (1) Confusing the 'LF' (low-voltage) variant with the standard 'F' PIC16F77 - the LF has 2.0 V min, the F has 4.0 V min. (2) Forgetting that the 44-pin PLCC pinout differs from the 40-pin DIP pinout - the PLCC has additional PORTD and PORTE pins. (3) ICSP pins RB6/RB7/RB3 are shared with PORTB - add isolation resistors if those pins drive external loads during programming. (4) The 'T' suffix means tape and reel - prototypes should order the non-T variant in tube.
Thông tin tuân thủ
RoHS compliant per Microchip product page. NOT AEC-Q100 qualified - for automotive applications, evaluate PIC16F77-I/L automotive variants or newer PIC16F1939 family. Halogen-free and lead-free per Microchip packaging materials datasheet.
