PIC16F77T-E/L - 8-Bit 20MHz 14KB Flash MCU | Microchip | 44-PLCC
MPN: PIC16F77T-E/L โ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $12.85 | $12.85 |
| 10 | $11.62 | $116.20 |
| 100 | $10.45 | $1,045.00 |
| 500 | $9.38 | $4,690.00 |
| 1,000 | $8.25 | $8,250.00 |
PIC16F77T-E/L Overview
A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory (FLASH/ROM), data memory (RAM), timers, communication peripherals, and I/O ports - all integrated into one IC. The PIC16F77T-E/L belongs to the 8-bit MCU category within Microchip's PIC16 family, which sits in the broader hierarchy of: PIC16F77 -> PIC16F7X sub-family -> PIC16 mid-range family -> PIC microcontrollers -> 8-bit microcontrollers -> microcontrollers -> semiconductors. Its architecture is upward compatible with PIC16C5X, PIC12CXXX, and PIC16C7X devices, easing migration for legacy designs.
Key features include 8 channels of 8-bit Analog-to-Digital (A/D) conversion with 2 additional channels of 8-bit A/D on the 40/44-pin variants, multiple timer modules, a USART/SCI serial interface, and an I/O/SS voltage flexibility rating that supports both 5V and 3.3V system designs. The 'T' suffix indicates Tape & Reel packaging, while 'E' designates the Enhanced industrial temperature range (-40C to +125C), and 'L' denotes the 44-pin PLCC package. It includes a comprehensive peripheral set: 3 timers, 2 capture/compare/PWM modules, and a watchdog timer.
The PIC16F77T-E/L utilizes Microchip's RISC Harvard-architecture core with separate program and data buses, enabling simultaneous instruction fetch and data access. This architecture provides deterministic timing critical for real-time control applications and minimizes interrupt latency. The FLASH program memory supports in-circuit serial programming (ICSP), allowing firmware updates without removing the device from the board.
Typical applications include industrial control systems, motor control, instrumentation, sensor interfaces, and embedded consumer products. The wide operating voltage (2.0V-5.5V for F-variant; 4.0V-5.5V typical) and extended temperature range make it suitable for harsh-environment deployments. It is also a popular choice in educational and hobbyist projects due to its mature toolchain (MPLAB IDE, PICkit programmers).
When designing with this device, consider its 5V typical operating voltage for legacy industrial designs. The 44-PLCC package requires through-hole PCB mounting or socket, which simplifies prototyping but is less suitable for high-vibration environments. For new designs requiring modern peripherals, evaluate the PIC18F or PIC24 families, but for legacy drop-in replacement and existing PCB reuse, the PIC16F77T-E/L remains a viable solution. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone manufacturer datasheet.
Drop-in alternatives for PIC16F77T-E/L โ same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with PIC16F77T-E/L (same form factor and footprint) โ differing in Mounting Type, Timers, Core Architecture, Operating Temperature Range, Package Type.
Quick Comparison Tool โ Select alternative parts for side-by-side comparison:
PIC16F77-E/L
โ Drop-In๐ Reference alternative (not in catalog)
PIC16F77-I/L
โ Drop-In๐ Reference alternative (not in catalog)
PIC16F77T-I/L
โ Drop-Inโ In Stock
$6.95 / Unit
View Datasheet โPIC16F74-I/L
โ Drop-In๐ Reference alternative (not in catalog)
PIC16F76-I/L
โ Drop-In๐ Reference alternative (not in catalog)
PIC16F777-I/PT
โ Drop-In๐ Reference alternative (not in catalog)
PIC16F77T-E/L Maximum Ratings & Electrical Characteristics
| Series | PICยฎ 16F |
| Core Processor | PIC |
| Core Size | 8-Bit |
| Core Speed | 20 MHz |
| Instruction Set Architecture | RISC, 35 single-word instructions |
| Instruction Execution Time | 200 ns |
| Program Memory Type | FLASH |
| Program Memory Size | 14 KB (8K x 14) |
| RAM Size | 368 bytes |
| EEPROM Size | 256 bytes |
| Package Type | 44-PLCC (J-Lead, 16.59 x 16.59 mm) |
| Packaging | Tape & Reel (T suffix) |
| Operating Temperature Range | -40C to +125C (E grade) |
| Supply Voltage | 4.0 V to 5.5 V (5V typical) |
| A/D Converter | 8 channels x 8-bit + 2 additional on 44-pin variants |
| Timers | 3 |
| Capture/Compare/PWM Modules | 2 |
| Communication Interface | USART/SCI |
| Watchdog Timer | Yes |
| In-Circuit Programming | ICSP supported |
| Pin Count | 44 |
| Mounting Type | Surface Mount (PLCC J-Lead) |
| RoHS Status | Compliant |
| MSL Level | 3 (168 hours) |
PIC16F77T-E/L Pin Configuration
| Pin 1 | MCLR/VPP โ Master Clear (Reset) input / Programming voltage |
| Pin 2 | OSC1/CLKIN โ Oscillator crystal input / External clock input |
| Pin 3 | OSC2/CLKOUT โ Oscillator crystal output / Clock output |
| Pin 4 | RA0/AN0 โ PORTA bit 0 / Analog input channel 0 |
| Pin 5 | RA1/AN1 โ PORTA bit 1 / Analog input channel 1 |
| Pin 6 | RA2/AN2 โ PORTA bit 2 / Analog input channel 2 |
| Pin 7 | RA3/AN3/VREF โ PORTA bit 3 / Analog input channel 3 / Voltage reference |
| Pin 8 | RA4/T0CKI โ PORTA bit 4 / Timer 0 clock input |
| Pin 9 | RA5/AN4/SS โ PORTA bit 5 / Analog input 4 / SPI Slave select |
| Pin 10 | VSS โ Ground reference |
| Pin 11 | VDD โ Positive supply voltage (5V) |
| Pin 12 | RB0/INT โ PORTB bit 0 / External interrupt input |
| Pin 13 | RB1 โ PORTB bit 1 |
| Pin 14 | RB2 โ PORTB bit 2 |
| Pin 15 | RB3/PGM โ PORTB bit 3 / Low-voltage programming |
| Pin 16 | RB4 โ PORTB bit 4 |
| Pin 17 | RB5 โ PORTB bit 5 |
| Pin 18 | RB6/PGC โ PORTB bit 6 / ICSP clock |
| Pin 19 | RB7/PGD โ PORTB bit 7 / ICSP data |
| Pin 20 | VSS โ Ground reference |
| Pin 21 | VDD โ Positive supply voltage (5V) |
| Pin 22 | RC0/T1OSO/T1CKI โ PORTC bit 0 / Timer 1 oscillator output / Timer 1 clock |
| Pin 23 | RC1/T1OSI โ PORTC bit 1 / Timer 1 oscillator input |
| Pin 24 | RC2/CCP1 โ PORTC bit 2 / Capture/Compare/PWM 1 |
| Pin 25 | RC3/SCK/SCL โ PORTC bit 3 / SPI clock / I2C clock |
| Pin 26 | RC4/SDI/SDA โ PORTC bit 4 / SPI data in / I2C data |
| Pin 27 | RC5/SDO โ PORTC bit 5 / SPI data out |
| Pin 28 | RC6/TX/CK โ PORTC bit 6 / USART transmit / clock |
| Pin 29 | RC7/RX/DT โ PORTC bit 7 / USART receive / data |
| Pin 30 | VSS โ Ground reference |
| Pin 31 | VDD โ Positive supply voltage (5V) |
| Pin 32 | RD0 โ PORTD bit 0 |
| Pin 33 | RD1 โ PORTD bit 1 |
| Pin 34 | RD2 โ PORTD bit 2 |
| Pin 35 | RD3 โ PORTD bit 3 |
| Pin 36 | RD4 โ PORTD bit 4 |
| Pin 37 | RD5 โ PORTD bit 5 |
| Pin 38 | RD6 โ PORTD bit 6 |
| Pin 39 | RD7 โ PORTD bit 7 |
| Pin 40 | VSS โ Ground reference |
| Pin 41 | VDD โ Positive supply voltage (5V) |
| Pin 42 | RE0/RD/AN5 โ PORTE bit 0 / Parallel slave port read / AN5 |
| Pin 43 | RE1/WR/AN6 โ PORTE bit 1 / Parallel slave port write / AN6 |
| Pin 44 | RE2/CS/AN7 โ PORTE bit 2 / Parallel slave port chip select / AN7 |
Typical Applications
PIC16F77T-E/L is suitable for 8 applications: Industrial Motor Control, Embedded Sensor Interface, HVAC Control Systems, Automotive Body Electronics, Educational and Prototyping Platforms, Instrumentation and Data Acquisition, Consumer Appliance Control, Power Supply Monitoring.
Industrial Motor Control
The PIC16F77T-E/L's 2 CCP (Capture/Compare/PWM) modules and 20MHz deterministic core make it well-suited for industrial motor control applications. Its 200ns instruction execution enables precise PWM generation for brushless DC motor commutation at speeds up to several thousand RPM. The 8+2 channels of 8-bit A/D conversion handle current sensing through shunt resistors, while the USART provides communication with industrial controllers. The Enhanced -40C to +125C temperature rating supports deployment in factory-floor environments with elevated ambient temperatures. This MCU is commonly specified in stepper motor drivers, small BLDC fans, and conveyor motor controllers.
Recommended
Embedded Sensor Interface
The PIC16F77T-E/L is widely used in sensor interface modules due to its 8+2 channel 8-bit A/D converter and flexible I/O architecture. The 368 bytes of RAM and 256 bytes of EEPROM allow local buffering of sensor calibration constants, while the 14KB FLASH supports complex signal conditioning algorithms. The ICSP (In-Circuit Serial Programming) interface permits firmware updates during sensor module calibration. The 44-PLCC package accommodates breadboard prototyping through sockets, popular in educational and industrial sensor development. The Harvard architecture and deterministic timing ensure consistent sensor sampling rates critical for measurement accuracy.
Recommended
HVAC Control Systems
The PIC16F77T-E/L's 5V operation, 8-bit A/D converter, and multiple timer/PWM channels suit HVAC (heating, ventilation, air conditioning) controller applications. Its 20MHz core executes control loops for damper actuation and fan speed regulation with deterministic timing. The USART enables communication with building management systems (BMS), while the 44-PLCC package supports industrial temperature environments typical of mechanical rooms. The 14KB FLASH accommodates PID control algorithms and user interface logic. Enhanced temperature rating (-40C to +125C) ensures reliable operation in unconditioned equipment spaces.
Recommended
Automotive Body Electronics
The PIC16F77T-E/L serves automotive body electronics applications such as seat controllers, lighting modules, and accessory timers. The PIC16F7X family is established in automotive designs where its 44-PLCC package supports through-hole sockets for service-friendly assembly. The CCP modules generate PWM signals for LED dimming and motor speed control, while the USART interfaces with LIN or CAN transceivers. While not AEC-Q100 qualified, this MCU is widely deployed in non-safety automotive applications. The Enhanced -40C to +125C temperature rating meets under-dash thermal requirements.
Recommended
Educational and Prototyping Platforms
The PIC16F77T-E/L is a cornerstone MCU for embedded systems education and prototyping due to its mature MPLAB IDE toolchain, PICkit programmer compatibility, and abundant academic resources. The 44-PLCC package fits standard development sockets and breadboards, simplifying lab exercises. With 14KB FLASH and 35 single-word RISC instructions, students learn assembly and C programming in a constrained but capable environment. The ICSP interface allows in-circuit debugging and reprogramming during iterative development. Universities and training centers favor this MCU for teaching timers, A/D converters, and interrupt-driven programming.
Recommended
Instrumentation and Data Acquisition
The PIC16F77T-E/L powers portable instrumentation and data acquisition systems where its 8+2 channel A/D converter samples multiple analog signals simultaneously. The 14KB FLASH stores calibration tables and lookup data, while 256 bytes EEPROM retains user-configured settings across power cycles. The 20MHz core processes acquisition algorithms with deterministic timing, and the USART streams data to PC-based logging software. The Enhanced temperature grade supports field deployment in industrial environments. Compact 44-PLCC packaging enables integration into handheld meter enclosures.
Recommended
Consumer Appliance Control
The PIC16F77T-E/L is used in consumer appliance control boards including washing machines, microwave ovens, and small kitchen appliances. Its 44-PLCC package accommodates through-hole sockets for serviceability, while the 14KB FLASH supports user interface logic, sensor processing, and motor control. The CCP modules drive triac-based heater controls and universal motor PWM, and the 8-bit A/D reads temperature and humidity sensors. Low-cost and mature supply chain make this MCU attractive for high-volume consumer products.
Recommended
Power Supply Monitoring
The PIC16F77T-E/L serves as a supervisory controller in switch-mode power supplies (SMPS) and UPS systems. Its A/D converter monitors output voltage and current feedback loops, while CCP modules generate PWM for synchronous rectification control in digital power applications. The USART communicates with system controllers reporting fault conditions, and 256 bytes EEPROM stores operating history. The deterministic 200ns instruction execution enables tight regulation loops in telecom and industrial power systems.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F77T-E/L โ comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F77-E/L | PIC16F77-I/L | PIC16F77T-I/L | PIC16F74-I/L | PIC16F777-I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-PLCC (J-Lead) | 44-PLCC (J-Lead) - same | 44-PLCC (J-Lead) - same | 44-PLCC (J-Lead) - same | 44-PLCC (J-Lead) - same | 44-TQFP - different footprint |
| Program Memory | 14 KB FLASH | 14 KB FLASH | 14 KB FLASH | 14 KB FLASH | 7 KB FLASH (-50%) | 14 KB FLASH |
| Core Speed | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Operating Temperature | -40C to +125C (Enhanced) | -40C to +125C (Enhanced) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| A/D Channels | 8 + 2 (10 total) | 8 + 2 (10 total) | 8 + 2 (10 total) | 8 + 2 (10 total) | 5 + 2 (7 total) | 8 + 2 (10 total) |
| RAM Size | 368 bytes | 368 bytes | 368 bytes | 368 bytes | 192 bytes (-48%) | 368 bytes |
| EEPROM | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 128 bytes (-50%) | 256 bytes |
| Packaging | Tape & Reel | Tray | Tray | Tape & Reel | Tray | Tray |
Key Differentiators
- Enhanced -40C to +125C temperature grade for harsh industrial deployments (vs PIC16F77-I/L)
- Tape & Reel packaging format for high-volume SMT assembly (vs PIC16F77-E/L)
- Larger 14KB FLASH vs lower-memory family members (vs PIC16F74-I/L)
- 8+2 channel A/D converter provides more analog inputs than 28-pin variants (vs PIC16F76-I/L)
Design Notes
Decouple VDD with 100nF ceramic + 10uF tantalum capacitors placed within 5mm of each VDD pin. The PIC16F77T-E/L has four VDD pins (11, 21, 31, 41) and corresponding VSS grounds on the 44-PLCC package, each requiring local decoupling. Brown-out reset is recommended for industrial environments with unstable supplies; configure BOR via configuration bits per the manufacturer datasheet.
Ensure the MCLR pin (pin 1) is pulled high through a 10kohm resistor and decoupled with 100nF to prevent spurious resets from noise. When using ICSP programming, isolate the MCLR pull-up from the programmer's VPP line to avoid programming failures. Configuration bits must be set correctly to enable the watchdog timer and low-voltage programming as needed; wrong configuration bit settings lock the device.
The 44-PLCC package has a center cavity for socket mounting - ensure PCB land pattern follows IPC-7351 PLCC-44 specifications with J-lead footprints at 1.27mm pitch. Keep high-speed signals (OSC, ICSP) short and away from analog inputs AN0-AN9 to minimize crosstalk. Provide a ground plane under the MCU with vias stitching around the perimeter to suppress radiated emissions.
The 20MHz oscillator circuit is sensitive to PCB layout. Place the crystal or resonator within 10mm of OSC1/OSC2 pins with short symmetrical traces. Add a 1Mohm feedback resistor across OSC1/OSC2 for stable Pierce oscillator startup. For noise-sensitive A/D conversions, use a separate AVSS/AVDD supply pair if available, or add ferrite beads between digital and analog VDD traces.
Compliance Information
RoHS and REACH compliant per Microchip product environmental compliance data. Not AEC-Q100 qualified - the PIC16F77T-E/L is specified for industrial (-40C to +125C) but not automotive safety-critical applications. Lead-free and halogen-free per Microchip material declarations.
