PIC16LF777T-I/PT - 14KB Flash 8-bit MCU 44-TQFP | Microchip
MPN: PIC16LF777T-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.8096 | $5.81 |
| 10 | $5.23 | $52.30 |
| 100 | $4.65 | $465.00 |
| 500 | $4.07 | $2,035.00 |
| 1,000 | $3.49 | $3,490.00 |
PIC16LF777T-I/PT Overview
A PIC microcontroller is a programmable logic device that combines a CPU, non-volatile program memory, RAM, and specialized peripherals on a single chip. The PIC16F family belongs to Microchip's mid-range 8-bit architecture positioned above baseline PIC10/12/14 devices in the taxonomy: PIC16F -> mid-range 8-bit MCU -> 8-bit microcontroller -> microcontroller -> embedded processor -> semiconductor IC. Its 35 single-cycle instructions simplify code development, while an integrated two-speed oscillator supports low-power standby and switch-over for battery-aware designs.
Key features include nanoWatt Technology power management with multiple idle/sleep modes, an ICD (In-Circuit Debugger) interface compatible with MPLAB tools, a wide operating range of -40C to +85C, and a programmable code protection scheme. The 'LF' prefix signals the lower-voltage 2.0V-5.5V capability while maintaining 10 MIPS throughput, distinguishing it from the standard PIC16F777 variants that operate from 4.0V to 5.5V. The 'T-I' suffix designates tape-and-reel packaging and the industrial temperature grade, while /PT identifies the 44-pin TQFP.
Typical applications include industrial control panels, sensor interface boards, consumer appliance controllers, smoke and gas detectors, low-power remote sensor nodes, and small home-automation devices. The integrated ADC and PWM peripherals make it well suited to closed-loop feedback systems such as motor speed control, LED dimming, and battery-charging regulators.
When designing, note that migrating to a larger pin-count PIC18 device offers higher MIPS at similar cost, while moving to the PIC16F777 (4.0V-5.5V only) lets a single part cover 5V-only designs. Always leave ADC inputs unused in firmware to avoid parasitic current draw and place a 0.1uF decoupling capacitor on each VDD pin within 5 mm of the package.
Drop-in alternatives for PIC16LF777T-I/PT — 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 PIC16LF777T-I/PT (same form factor and footprint) — differing in ADC, Package, Operating Temperature, Communication, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF777-I/PT
✅ Drop-In✓ In Stock
$5.28 / Unit
View Datasheet →PIC16F777T-I/PT
✅ Drop-In✓ In Stock
$4.65 / Unit
View Datasheet →PIC16LF777T-I/ML
✅ Drop-In✓ In Stock
$2.84 / Unit
View Datasheet →PIC16LF747-I/PT
✅ Drop-In✓ In Stock
$4.21 / Unit
View Datasheet →PIC16LF767T-I/SS
✅ Drop-In✓ In Stock
$4.13 / Unit
View Datasheet →PIC16LF777T-I/PT Maximum Ratings & Electrical Characteristics
| Architecture | PIC16 8-bit RISC (mid-range) |
| Program Memory (Flash) | 14 KB |
| RAM | 368 bytes |
| EEPROM | 256 bytes |
| CPU Speed | 10 MIPS at 10 MHz |
| Operating Voltage | 2.0 V to 5.5 V (LF family) |
| I/O Pins | 36 |
| ADC | 10-bit, up to 14 channels |
| PWM Modules | 2 ECCP + 1 CCP |
| Comparators | 2 analog |
| Communication | Enhanced USART, MSSP (I2C/SPI) |
| Timers | 8-bit x 2 + 16-bit x 1 + WDT |
| Package | 44-TQFP (PT), 10x10 mm |
| Operating Temperature | -40 C to +85 C (industrial, I grade) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| MSL Level | 3 (168 hours) |
PIC16LF777T-I/PT Pin Configuration
| Pin 1 | RA0/AN0 — Digital I/O / Analog channel 0 |
| Pin 2 | RA1/AN1 — Digital I/O / Analog channel 1 |
| Pin 3 | RA2/AN2 — Digital I/O / Analog channel 2 / VREF- |
| Pin 4 | RA3/AN3 — Digital I/O / Analog channel 3 / VREF+ |
| Pin 5 | RA4 — Digital I/O (open-drain) |
| Pin 6 | RA5/AN4 — Digital I/O / Analog channel 4 |
| Pin 7 | VSS — Ground |
| Pin 8 | VDD — Positive supply (2.0-5.5 V) |
| Pin 9 | OSC1/CLKI — Oscillator input or external clock |
| Pin 10 | OSC2/CLKO — Oscillator output |
| Pin 11 | RC0/T1OSO/T1CKI — Digital I/O / Timer1 oscillator |
| Pin 12 | RC1/T1OSI/CCP2 — Digital I/O / Timer1 oscillator / Capture-Compare-PWM 2 |
| Pin 13 | RC2/CCP1 — Digital I/O / Capture-Compare-PWM 1 |
| Pin 14 | RC3 — Digital I/O |
| Pin 15 | RD0 — Digital I/O |
| Pin 16 | RD1 — Digital I/O |
| Pin 17 | RD2 — Digital I/O |
| Pin 18 | RD3 — Digital I/O |
| Pin 19 | RD4 — Digital I/O |
| Pin 20 | RD5 — Digital I/O |
| Pin 21 | RD6 — Digital I/O |
| Pin 22 | RD7 — Digital I/O |
| Pin 23 | VSS — Ground |
| Pin 24 | VDD — Positive supply (2.0-5.5 V) |
| Pin 25 | RB0/INT — Digital I/O / External interrupt |
| Pin 26 | RB1 — Digital I/O |
| Pin 27 | RB2 — Digital I/O |
| Pin 28 | RB3/PGM — Digital I/O / ICSP programming clock |
| Pin 29 | RB4 — Digital I/O / interrupt-on-change |
| Pin 30 | RB5 — Digital I/O / interrupt-on-change |
| Pin 31 | RB6/PGC — Digital I/O / ICSP clock / ICD clock |
| Pin 32 | RB7/PGD — Digital I/O / ICSP data / ICD data |
| Pin 33 | RE0/RD — Digital I/O / Parallel-port read strobe |
| Pin 34 | RE1/WR — Digital I/O / Parallel-port write strobe |
| Pin 35 | RE2/CS — Digital I/O / Parallel-port chip select |
| Pin 36 | RC4/SDI/SDA — Digital I/O / SPI data in / I2C data |
| Pin 37 | RC5/SDO — Digital I/O / SPI data out |
| Pin 38 | RC6/TX/CK — Digital I/O / USART TX / clock |
| Pin 39 | RC7/RX/DT — Digital I/O / USART RX / data |
| Pin 40 | VSS — Ground |
| Pin 41 | VDD — Positive supply (2.0-5.5 V) |
| Pin 42 | VSS — Ground |
| Pin 43 | AN5 — Analog channel 5 |
| Pin 44 | AN6 — Analog channel 6 |
Typical Applications
PIC16LF777T-I/PT is suitable for 6 applications: Industrial Control Panels, Sensor Interface Boards, Consumer Appliance Controllers, Smoke and Gas Detectors, LED Lighting Drivers, Battery Charging Regulators.
Industrial Control Panels
The PIC16LF777T-I/PT is well suited to industrial control panels that demand a wide -40 C to +85 C operating envelope and 36 digital I/O for switch sensing, relay driving, and status LEDs. Its 14 KB Flash comfortably runs ladder-logic interpreters and Modbus RTU slaves, while the 10-bit ADC with up to 14 channels reads potentiometers, temperature sensors and 4-20 mA loop inputs. The integrated ECCP modules produce accurate PWM for soft-start motor and solenoid control, while the 2.0 V to 5.5 V supply lets the board run directly from 24 V industrial rails after a small LDO.
Recommended
Sensor Interface Boards
Sensor interface boards leverage the PIC16LF777T-I/PT's native 10-bit ADC, dual analog comparators and 14 KB Flash to host linearization, calibration and Modbus-conversion firmware for thermocouples, RTDs and pressure transducers. The 2.0 V to 5.5 V supply is ideal for 3.3 V IoT sensor hubs, while the enhanced USART and MSSP allow SPI sensors, I2C peripherals and RS-485 uplinks to coexist on the same MCU. Power consumption drops below 1 uA in Sleep mode, perfect for energy-harvested wireless sensor nodes.
Recommended
Consumer Appliance Controllers
Microwave ovens, coffee machines, washing machines and induction cookware control boards all use the PIC16LF777T-I/PT's 36 I/O to drive keypads, seven-segment displays, buzzers and triac-based AC loads. The 10 MIPS throughput executes real-time state machines without jitter, while the nanoWatt idle modes meet ENERGY STAR standby targets of less than 0.5 W. The 14 KB Flash holds protocol stacks for BLE-bound appliances, persisting user settings through 256 bytes of EEPROM across power cycles.
Recommended
Smoke and Gas Detectors
Photoelectric smoke detectors and electrochemical gas sensors use the PIC16LF777T-I/PT because its dual analog comparators continuously monitor the IR scatter chamber or fuel-cell output without burdening the CPU. The 10-bit ADC with internal reference provides calibrated thresholding, and Sleep current below 1 uA enables 10-year battery life on the standard 9 V cell. The ICSP/ICD pins allow end-of-line firmware calibration, while the -40 C to +85 C range covers unheated attics and cold garages.
Recommended
LED Lighting Drivers
Architectural and horticultural LED drivers benefit from the PIC16LF777T-I/PT's three PWM modules (2 ECCP + 1 CCP) and 10-bit ADC for closed-loop current and color-mixing control. The 2.0 V to 5.5 V supply simplifies auxiliary power designs, while USART/MSSP host DMX-512, DALI or wireless bridges. With 14 KB Flash reserved for color-space conversion and thermal fold-back algorithms, the MCU is more affordable than most dedicated LED controllers while delivering comparable dimming depth.
Recommended
Battery Charging Regulators
Low-power battery-charging regulators for handheld tools and portable instruments use the PIC16LF777T-I/PT to monitor pack voltage and current via the 10-bit ADC, drive MOSFETs with the ECCP PWM, and run CC/CV profiles from 14 KB of Flash. The 368-byte SRAM is large enough for state-of-charge tables, and 256 bytes of EEPROM store calibration constants. The 2.0 V minimum supply lets the MCU start from deeply discharged cells that competing 4 V-only parts cannot operate.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF777T-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF777-I/PT | PIC16F777T-I/PT | PIC16LF777T-I/ML | PIC16LF747-I/PT | PIC16LF767T-I/SS |
|---|---|---|---|---|---|---|
| Package | 44-TQFP (PT) | 44-TQFP (PT) | 44-TQFP (PT) | 44-QFN (ML) | 44-TQFP (PT) | 28-SSOP (SS) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 14 KB Flash | 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 | 368 bytes |
| Operating Voltage | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 4.0 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 |
| I/O Count | 36 | 36 | 36 | 36 | 33 (-8%) | 25 (-31%) |
| CPU Speed | 10 MIPS (10 MHz) | 10 MIPS | 10 MIPS | 10 MIPS | 10 MIPS | 10 MIPS |
| Packaging | Tape & Reel | Tray / Tube | Tape & Reel | Tape & Reel | Tube (also reel) | Tape & Reel |
| Estimated Unit Price (qty 1) | $5.81 | $5.50 (estimated) | $5.40 (estimated) | $5.90 (estimated) | $4.60 (estimated) | $4.10 (estimated) |
Key Differentiators
- 2.0 V to 5.5 V supply range enables battery-powered designs (vs PIC16F777T-I/PT (5 V-only))
- Maximizes Flash and I/O in the 44-pin TQFP footprint (vs PIC16LF747-I/PT)
- Richest peripheral set in the PIC16F77x family (vs PIC16LF767T-I/SS)
Design Notes
Estimated: at 10 MHz CPU clock, 5 V supply and all peripherals active, the PIC16LF777T-I/PT draws about 4 mA, and 3 mA at 3.3 V. In Sleep the MCU drops below 1 uA when the WDT is disabled. Place a 0.1uF decoupling capacitor within 5 mm of each VDD pin (44-TQFP has 3 VDD pins: 8, 24, 41) and a bulk 10uF tantalum or ceramic at the regulator output to suppress digital switching noise from corrupting ADC readings.
Estimated: when laying out the 44-TQFP footprint, fan out the analog and digital sections on opposite sides of the package to minimize substrate coupling. Keep the analog VDD/VSS pair (VDD24/VSS23) isolated from digital VDD/VSS (VDD8/VSS7, VDD41/VSS40) with a ferrite bead or 10 ohm resistor; this grounding topology achieves ADC accuracy close to the datasheet 10-bit rating. Reserve 1 mm clearance between the QFN exposed pad (ML variant) and any signal trace when selecting the land pattern.
The 10-bit ADC on the PIC16LF777T-I/PT achieves its 1 LSB resolution (about 4.9 mV at 5 V) only if acquisition time is at least 2.5 us and the source impedance is below 10 kohm. Otherwise oversample and average in firmware. Use the internal 5 V reference rather than VDD for absolute measurements because VDD drifts with load.
Do not leave unused ADC inputs floating: configure them as digital outputs or tie them to ground through 100 kohm. Floating analog pins inject noise and can pull several hundred microamps through the protection diodes, which is critical for battery-powered designs. Similarly, the MCLR pin must be tied to VDD through a 10 kohm pull-up; a floating MCLR can spontaneously reset the MCU during brownouts.
Compliance Information
RoHS and lead-free per Microchip product page. AEC-Q100 qualification not available for this industrial-grade part; designers needing automotive-grade equivalents should select PIC18F variants with -Q1 ordering codes.
