PIC16F777T-I/ML - 8-bit 20MHz 14KB Flash MCU 44-QFN | Microchip
MPN: PIC16F777T-I/ML ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $9.2 | $9.20 |
| 10 | $8.45 | $84.50 |
| 100 | $7.4 | $740.00 |
| 500 | $6.55 | $3,275.00 |
| 1,000 | $5.85 | $5,850.00 |
PIC16F777T-I/ML Overview
An 8-bit microcontroller (MCU) is a small, single-chip computer built around an 8-bit data path that integrates a CPU core, non-volatile program memory (FLASH or ROM), volatile working memory (SRAM), digital I/O, and on-chip peripherals such as timers, ADC, and serial interfaces. MCUs sit at the lowest level of the embedded computing hierarchy - below microprocessors - and are designed to run deterministic real-time control loops in products ranging from washing machines to industrial sensors. The PIC16F777 belongs to the mid-range PIC16 family, which Microchip introduced as a successor to the baseline PIC16C5X and PIC12CXXX lines, and which remains fully code-compatible with the PIC16C7X OTP family.
Key features that differentiate the PIC16F777T-I/ML include NanoWatt power management with multiple idle/sleep modes that drop supply current into the microamp range, an extended instruction set of 35 single-word instructions, 200 ns instruction execution, and an integrated ICD/ICSP programming/debug interface that allows in-circuit firmware updates without removing the part. The 44-pin QFN footprint also exposes a high pin count (36 I/O) suitable for human-interface or motor-control panels.
The architecture is a Harvard RISC design with separate program and data buses, a hardware multiplier, and an 8-level deep hardware stack. Combined with the 14-channel 10-bit ADC, this makes the part suitable for sensor-fusion and closed-loop control.
Typical applications include industrial control panels, HVAC thermostats, motor-control front-ends, automotive body electronics, white goods user-interface boards, and remote sensor nodes. Designers favor this family when deterministic real-time response, on-chip ADC, and code-protectable FLASH outweigh the need for a Cortex-M class core.
Designers should plan for an external 20 MHz resonator, a 100 nF decoupling cap on VDD, and a bulk 10 uF cap near the analog AVdd pin to keep ADC readings clean. Circuit placement near noisy switching stages should be avoided or shielded.
This page synthesizes verified distributor pricing, parametric drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC16F777T-I/ML — 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 PIC16F777T-I/ML (same form factor and footprint) — differing in ADC, Package, Timers, Communication, I/O Pins.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F777-I/ML
✅ Drop-In✓ In Stock
$5.48 / Unit
View Datasheet →PIC16F76-I/ML
✅ Drop-In✓ In Stock
$1.95 / Unit
View Datasheet →PIC16F767T-I/SS
✅ Drop-In✓ In Stock
$4.18 / Unit
View Datasheet →PIC16F74T-I/PT
✅ Drop-In✓ In Stock
$5.21 / Unit
View Datasheet →PIC16F767-I/ML
✅ Drop-In✓ In Stock
$2.85 / Unit
View Datasheet →PIC16F77T-I/ML
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F777T-I/ML Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC16 RISC (Harvard) |
| Program Memory Type | FLASH |
| Program Memory Size | 14 KB (8K x 14 words) |
| RAM | 368 bytes |
| Maximum Clock Frequency | 20 MHz |
| Instruction Execution Time | 200 ns |
| Operating Voltage | 2.0 V to 5.5 V |
| I/O Pins | 36 |
| ADC | 14 channels, 10-bit |
| Timers | 3 |
| PWM Modules | 3 (2 CCP + 1 enhanced) |
| Communication | USART + MSSP (SPI / I2C) |
| Package | 44-QFN (8x8 mm) with EP |
| Operating Temperature | -40 C to +85 C (Industrial) |
| Mounting Type | Surface Mount |
| MSL Level | 3 (168 hours) |
| Lead-Free / RoHS | Yes / Compliant |
PIC16F777T-I/ML Pin Configuration
| Pin 1 | RA0/AN0 — PORTA bit 0 / Analog input channel 0 |
| Pin 2 | RA1/AN1 — PORTA bit 1 / Analog input channel 1 |
| Pin 3 | RA2/AN2/VREF- — PORTA bit 2 / Analog input 2 / ADC VREF- |
| Pin 4 | RA3/AN3/VREF+ — PORTA bit 3 / Analog input 3 / ADC VREF+ |
| Pin 5 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Pin 6 | RA5/AN4/SS — PORTA bit 5 / Analog input 4 / SPI slave select |
| Pin 7 | RA6 — PORTA bit 6 |
| Pin 8 | OSC1/CLKI — Crystal oscillator input / external clock in |
| Pin 9 | OSC2/CLKO — Crystal oscillator output / clock out |
| Pin 10 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock |
| Pin 11 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 |
| Pin 12 | RC2/CCP1 — PORTC bit 2 / CCP1 PWM output |
| Pin 13 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Pin 14 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Pin 15 | RC5/SDO — PORTC bit 5 / SPI data out |
| Pin 16 | RC6/TX/CK — PORTC bit 6 / USART TX / USART clock |
| Pin 17 | RC7/RX/DT — PORTC bit 7 / USART RX / USART data |
| Pin 18 | RD0 — PORTD bit 0 |
| Pin 19 | RD1 — PORTD bit 1 |
| Pin 20 | RD2 — PORTD bit 2 |
| Pin 21 | RD3 — PORTD bit 3 |
| Pin 22 | RD4 — PORTD bit 4 |
| Pin 23 | RD5/PSP0 — PORTD bit 5 / Parallel slave port bit 0 |
| Pin 24 | RD6/PSP1 — PORTD bit 6 / Parallel slave port bit 1 |
| Pin 25 | RD7/PSP2 — PORTD bit 7 / Parallel slave port bit 2 |
| Pin 26 | VSS — Ground reference |
| Pin 27 | VDD — Positive supply voltage |
| Pin 28 | RE0/RD — PORTE bit 0 / Parallel slave port read control |
| Pin 29 | RE1/WR — PORTE bit 1 / Parallel slave port write control |
| Pin 30 | RE2/CS — PORTE bit 2 / Parallel slave port chip select |
| Pin 31 | AVDD — Analog positive supply voltage |
| Pin 32 | AVSS — Analog ground reference |
| Pin 33 | RB0/INT — PORTB bit 0 / External interrupt |
| Pin 34 | RB1 — PORTB bit 1 |
| Pin 35 | RB2 — PORTB bit 2 |
| Pin 36 | RB3/PGM — PORTB bit 3 / ICSP programming |
| Pin 37 | RB4 — PORTB bit 4 |
| Pin 38 | RB5/PGM — PORTB bit 5 / ICSP programming |
| Pin 39 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Pin 40 | RB7/PGD — PORTB bit 7 / ICSP data |
| Pin 41 | MCLR/VPP — Master clear reset / programming voltage |
| Pin 42 | NC — Not connected (per datasheet) |
| Pin 43 | NC — Not connected (per datasheet) |
| Pin 44 | NC — Not connected (per datasheet) |
Typical Applications
PIC16F777T-I/ML is suitable for 6 applications: Industrial Control Panel, HVAC Thermostat, Small Motor Control Front-End, White Goods User-Interface Board, Remote Sensor Node, Automotive Body Electronics (Non-Safety).
Industrial Control Panel
The PIC16F777T-I/ML fits industrial control panel designs because its 14 KB FLASH stores menu/setting firmware, 368 bytes of SRAM holds real-time I/O state, and 36 I/O pins drive keypads, LED indicators, character LCDs, and relay coils. The 14-channel 10-bit ADC reads potentiometers and analog sensors directly, replacing external ADC ICs and saving PCB area. Compared to a Cortex-M0+ design, the PIC16F777T offers lower cost (USD 7.40 at 100 pcs vs USD 2-3 for basic M0+), deterministic 200 ns interrupt latency, and Microchip's MPLAB X IDE ecosystem. Industrial -40C to +85C temperature grade handles factory-floor thermal stress without derating.
Recommended
HVAC Thermostat
The PIC16F777T-I/ML is well suited for HVAC thermostat main boards because its 14 KB FLASH supports scheduling firmware, 14 ADC channels read indoor/outdoor temperature sensors and humidity transducers, and 3 PWM outputs drive triac-fired fan coils. The 2.0-5.5V supply lets the MCU run directly from a 3.3V LDO fed by the 24VAC transformer tap, simplifying the analog front end. NanoWatt technology drops quiescent supply into the microamp range between button presses, satisfying Energy Star standby budgets.
Recommended
Small Motor Control Front-End
The PIC16F777T-I/ML fits small brushed-DC or stepper motor control front-ends because its 3 PWM modules and 2 CCP peripherals drive H-bridge MOSFETs with dead-band control, while the 14 ADC channels read back-EMF, current sense, and position feedback. Its 200 ns deterministic interrupt latency is critical for closed-loop torque control at PWM frequencies up to 50 kHz. The 44-QFN ML package exposes a thermal pad that handles the ~0.5W typical dissipation in motor PWM switching.
Recommended
White Goods User-Interface Board
The PIC16F777T-I/ML powers washing-machine, dishwasher, and refrigerator user-interface boards because its 36 I/O lines drive segment LCDs, capacitive touch buttons, status LEDs, and buzzer PWM. The 14 KB FLASH stores multi-region language strings, and the in-circuit serial programming (ICSP) interface allows end-of-line firmware customization. Industrial -40C to +85C temperature grade handles the kitchen-cabinet thermal envelope without performance degradation.
Recommended
Remote Sensor Node
The PIC16F777T-I/ML fits battery-powered remote sensor nodes because NanoWatt technology drops sleep current below 1 uA, the 14 ADC channels read multi-zone temperature/humidity/pressure transducers, and the 20 MHz core wakes fast enough to service sensor reads within milliseconds. The 14 KB FLASH holds TinyOS-lite or proprietary mesh stacks, while the 44-QFN package fits in a compact 8x8 mm footprint alongside a 2.4 GHz radio module.
Recommended
Automotive Body Electronics (Non-Safety)
The PIC16F777T-I/ML powers automotive body-electronics modules such as seat controllers, mirror adjusters, and interior lighting drivers because its 14 KB FLASH holds configurable mode firmware, 14 ADC channels read position-feedback pots, and 36 I/O drive multiple motors and lamps. The -40C to +85C industrial grade covers cabin thermal ranges, although underhood applications require the AEC-Q100 qualified PIC16F1xx family. Designers favor PIC16F for FOTA-less, deterministic-control body modules.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F777T-I/ML — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F777-I/ML | PIC16F76-I/ML | PIC16F767T-I/SS | PIC16F77T-I/ML |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-QFN (8x8 mm) | 44-QFN (8x8 mm) - same | 44-QFN (8x8 mm) - same | 44-QFN (8x8 mm) - same | 44-QFN (8x8 mm) - same |
| FLASH | 14 KB (8K x 14) | 14 KB | 7 KB (-50%) | 7 KB (-50%) | 14 KB |
| RAM | 368 B | 368 B | 192 B (-48%) | 192 B (-48%) | 368 B |
| ADC | 14-ch, 10-bit | 14-ch, 10-bit | 8-ch, 8-bit | 14-ch, 10-bit | No ADC |
| I/O Pins | 36 | 36 | 22 | 36 | 33 |
| Core Speed | 20 MHz / 200 ns | 20 MHz / 200 ns | 20 MHz / 200 ns | 20 MHz / 200 ns | 20 MHz / 200 ns |
| Unit Price @ 100 | USD 7.40 | USD 7.20 | USD 6.50 | USD 6.80 | USD 7.10 |
Key Differentiators
- Largest FLASH in PIC16F7X family (vs PIC16F767T-I/SS)
- Same 44-QFN package across family (vs PIC16F74T-I/PT)
- 14-channel 10-bit ADC with NanoWatt sleep (vs PIC16F77T-I/ML)
Design Notes
The PIC16F777T-I/ML accepts 2.0 V to 5.5 V on VDD and AVDD. Place a 100 nF ceramic decoupling capacitor within 5 mm of every VDD/AVDD pin and a 10 uF bulk capacitor near the analog AVdd pin. AVdd noise directly couples into ADC readings - keep analog and digital ground returns separate and join only at the IC exposed pad. Estimated: at 20 MHz active mode and 5 V supply, supply current is ~10 mA, well within a small LDO's rating.
Route the 20 MHz crystal traces (OSC1/OSC2) as short as possible (<5 mm), keep them above a continuous ground pour, and surround with a ground ring to suppress harmonic radiation. The exposed thermal pad on the 44-QFN (ML) package must be soldered to a 4 sq mm copper pad for thermal and electrical performance. Do not route high-speed digital signals under the analog AVdd traces or near the ADC inputs.
PIC16F777T-I/ML uses the RB6/RB7 pins (PGC and PGD) for ICSP programming and ICD debug - these must not be pulled to ground at start-up, otherwise the MCU enters programming mode and the application fails to boot. Also note that PORTB internal weak pull-ups can be overridden by external loads, so external 10 kohm pull-ups are recommended for production boards. The MCLR pin requires a 10 kohm pull-up to VDD and a 100 nF cap to ground for noise immunity.
Compliance Information
RoHS compliant per Microchip product page. NOT AEC-Q100 qualified - select PIC16F1xx AEC-Q100 variants for automotive applications. Industrial -40C to +85C temperature grade.
