PIC16LF77T-I/ML - 8-bit MCU 14KB Flash 20MHz 44-QFN | Microchip
MPN: PIC16LF77T-I/ML ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.45 | $7.45 |
| 10 | $6.71 | $67.10 |
| 100 | $5.96 | $596.00 |
| 500 | $5.36 | $2,680.00 |
| 1,000 | $4.77 | $4,770.00 |
PIC16LF77T-I/ML Overview
An 8-bit flash microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile flash program memory, data RAM, and peripherals on one die. PIC16-family MCUs sit in the hierarchy: 8-bit MCU -> microcontroller -> embedded processor -> semiconductor IC. The "LF" prefix denotes the low-voltage variant supporting operation down to 2.0 V, distinguishing it from the standard "F" parts that require a higher minimum supply.
Key features include 14 KB flash program memory (typically 8 K x 14 words), 368 bytes data RAM, 256 bytes EEPROM data memory, three timers, two capture/compare/PWM (CCP) modules, a 10-bit multi-channel analog-to-digital converter (ADC), and a USART with LIN support. The instruction set is 14-bit-wide RISC, with most instructions executing in a single 200 ns cycle at 20 MHz.
Typical applications include industrial control panels, low-power sensor nodes, automotive body electronics, appliance controllers, and embedded instrumentation where moderate processing throughput, generous flash, and a compact 44-QFN footprint are required. The exposed thermal pad (EP) on the QFN package improves power dissipation compared to equivalent QFP packages.
When designing with this part, ensure the decoupling capacitor is placed within 5 mm of the VDD pin, and route the MCLR reset line away from switching nodes to avoid inadvertent resets. The "T" suffix denotes tape-and-reel packaging, and "I" denotes the industrial -40C to +85C operating temperature range.
This page synthesizes distributor pricing, pin-compatible drop-in alternatives, and practical design notes that go beyond what is found in the manufacturer datasheet alone.
Drop-in alternatives for PIC16LF77T-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 PIC16LF77T-I/ML (same form factor and footprint) — differing in Package, ADC, Timers, Operating Temperature, Maximum CPU Frequency.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF777T-I/ML
✅ Drop-In✓ In Stock
$2.84 / Unit
View Datasheet →PIC16LF77-I/L
✅ Drop-In✓ In Stock
$5.4 / Unit
View Datasheet →PIC16LF77T-I/L
✅ Drop-In✓ In Stock
$6.2 / Unit
View Datasheet →PIC16LF777-I/ML
✅ Drop-In✓ In Stock
$3.05 / Unit
View Datasheet →PIC16LF767-I/ML
✅ Drop-In✓ In Stock
$2.74 / Unit
View Datasheet →PIC16LF77T-I/ML Maximum Ratings & Electrical Characteristics
| Architecture | 8-bit PIC16 RISC |
| Program Memory (Flash) | 14 KB |
| Data RAM | 368 bytes |
| EEPROM | 256 bytes |
| Maximum Clock Frequency | 20 MHz |
| Supply Voltage (VDD) | 2.0 V to 5.5 V |
| I/O Pins | 33 |
| ADC | 10-bit, 8 channels |
| Timers | 3 (Timer0, Timer1, Timer2) |
| CCP Modules | 2 |
| Serial Interfaces | USART (LIN-capable), MSSP (SPI/I2C) |
| Package | 44-pin QFN (ML) with exposed pad |
| Operating Temperature | -40C to +85C (industrial) |
| Mounting Type | Surface Mount |
| MSL Level | 3 (168 hours) |
| Lead-Free / RoHS | Lead-free, RoHS compliant |
PIC16LF77T-I/ML Pin Configuration
| Pin 1 | RA0/AN0 — Digital I/O / Analog input channel 0 |
| Pin 2 | RA1/AN1 — Digital I/O / Analog input channel 1 |
| Pin 3 | RA2/AN2/VREF- — Digital I/O / Analog input 2 / ADC VREF- |
| Pin 4 | RA3/AN3/VREF+ — Digital I/O / Analog input 3 / ADC VREF+ |
| Pin 5 | RA4/T0CKI — Digital I/O / Timer0 clock input |
| Pin 6 | RA5/AN4/SS — Digital I/O / Analog input 4 / SPI slave select |
| Pin 7 | OSC1/CLKIN — Oscillator input / external clock |
| Pin 8 | OSC2/CLKOUT — Oscillator output |
| Pin 9 | RC0/T1OSO/T1CKI — Digital I/O / Timer1 oscillator output |
| Pin 10 | RC1/T1OSI/CCP2 — Digital I/O / Timer1 oscillator / CCP2 |
| Pin 11 | RC2/CCP1 — Digital I/O / CCP1 output |
| Pin 12 | RC3/SCK/SCL — Digital I/O / SPI SCK / I2C SCL |
| Pin 13 | RC4/SDI/SDA — Digital I/O / SPI SDI / I2C SDA |
| Pin 14 | RC5/SDO — Digital I/O / SPI SDO |
| Pin 15 | RC6/TX/CK — Digital I/O / USART TX / clock |
| Pin 16 | RC7/RX/DT — Digital I/O / USART RX / data |
| Pin 17 | RD0/PSP0 — Digital I/O / Parallel Slave Port bit 0 |
| Pin 18 | RD1/PSP1 — Digital I/O / Parallel Slave Port bit 1 |
| Pin 19 | RD2/PSP2 — Digital I/O / Parallel Slave Port bit 2 |
| Pin 20 | RD3/PSP3 — Digital I/O / Parallel Slave Port bit 3 |
| Pin 21 | RD4/PSP4 — Digital I/O / Parallel Slave Port bit 4 |
| Pin 22 | RD5/PSP5 — Digital I/O / Parallel Slave Port bit 5 |
| Pin 23 | RD6/PSP6 — Digital I/O / Parallel Slave Port bit 6 |
| Pin 24 | RD7/PSP7 — Digital I/O / Parallel Slave Port bit 7 |
| Pin 25 | VSS — Ground |
| Pin 26 | VDD — Positive supply voltage |
| Pin 27 | RB0/INT — Digital I/O / External interrupt |
| Pin 28 | RB1 — Digital I/O |
| Pin 29 | RB2 — Digital I/O |
| Pin 30 | RB3/PGM — Digital I/O / Low-voltage ICSP programming |
| Pin 31 | RB4 — Digital I/O |
| Pin 32 | RB5 — Digital I/O |
| Pin 33 | RB6/PGC — Digital I/O / ICSP clock |
| Pin 34 | RB7/PGD — Digital I/O / ICSP data |
| Pin 35 | RE0/RD/AN5 — Digital I/O / Parallel Slave Port read / AN5 |
| Pin 36 | RE1/WR/AN6 — Digital I/O / Parallel Slave Port write / AN6 |
| Pin 37 | RE2/CS/AN7 — Digital I/O / Parallel Slave Port CS / AN7 |
| Pin 38 | VDD — Positive supply voltage |
| Pin 39 | VSS — Ground |
| Pin 40 | NC — Not connected (no internal bond on 44-QFN) |
| Pin 41 | NC — Not connected |
| Pin 42 | NC — Not connected |
| Pin 43 | NC — Not connected |
| Pin 44 | EP — Exposed thermal pad - tie to VSS |
Typical Applications
PIC16LF77T-I/ML is suitable for 6 applications: Industrial Control Panels, Battery-Powered Sensor Hubs, Automotive Body Electronics, Appliance Control Boards, Embedded Instrumentation, Home Automation Gateways.
Industrial Control Panels
The PIC16LF77T-I/ML fits industrial control panels because its 14 KB flash accommodates mid-complexity ladder-logic-to-C translation, 368 bytes of RAM handles real-time I/O scheduling, and 33 I/O pins drive keys, LEDs, relays, and segment displays. Operating from 2.0 V to 5.5 V, it interfaces directly with 24 V-sensed digital inputs through optocouplers and 5 V rail. The 44-QFN package reduces PCB area versus QFP equivalents, enabling compact panel-mount designs with an industrial -40C to +85C rating for factory floor deployment.
Recommended
Battery-Powered Sensor Hubs
The PIC16LF77T-I/ML suits battery-powered sensor hubs because it operates from 2.0 V - directly compatible with single Li-ion (3.0-4.2 V) or 2x AA cells. Its 8-channel 10-bit ADC reads thermistors, photocells, and gas sensors; 256 bytes EEPROM stores calibration constants; USART transmits readings over UART or LIN-bus at low duty cycle. Sleep current in the low-microamp range (per PIC16F7X datasheet) plus 20 MHz burst throughput for periodic wake-and-transmit cycles extends battery life in wireless sensor nodes.
Recommended
Automotive Body Electronics
The PIC16LF77T-I/ML is used in non-safety automotive body modules such as mirror controllers, seat-position memories, and lighting drivers, where its LIN-capable USART interfaces with the vehicle body bus. The 44-QFN exposed pad dissipates heat from continuous LED-driver or motor-driver MOSFET switching. Operating range of -40C to +85C handles under-hood and cabin environments. For AEC-Q100 automotive-qualified variants within the same family, designers should select the PIC16F77-I/L automotive-grade version instead of the LF industrial.
Recommended
Appliance Control Boards
The PIC16LF77T-I/ML serves washing machines, dishwashers, refrigerators, and microwave ovens where 14 KB flash stores user-interface state machines, 33 I/O drives triac-controlled loads and keypads, and the 10-bit ADC reads motor current and temperature sensors. Wide VDD range (2.0 V to 5.5 V) supports both 3.3 V logic-level HMI displays and 5 V driver stages from a common supply rail. The QFN-44 package simplifies conformal-coated PCB layouts in humid environments.
Recommended
Embedded Instrumentation
The PIC16LF77T-I/ML powers bench-top and portable instruments like multimeters, signal calibrators, and data-loggers. Its 14 KB flash fits USB-CDC stacks or SCPI command parsers, 368 bytes RAM buffers measurement frames, and 10-bit ADC provides 8-channel scanning for multi-sensor acquisition. The 44-QFN package fits handheld enclosures, and -40C to +85C industrial range tolerates lab and field conditions. USART/MSSP peripherals connect to displays, Bluetooth modules, or EEPROM datalogging storage.
Recommended
Home Automation Gateways
The PIC16LF77T-I/ML acts as a low-cost sub-MCU in home automation gateways, offloading simple I/O and sensor tasks from a Linux host processor. Its MSSP SPI/I2C masters communicate with sensors, the USART bridges to RS-485 or LIN, and 33 I/O drive indicator LEDs and local keypads. Wide VDD range accepts PoE-derived or battery-backed rails. The exposed-pad QFN-44 allows continuous 20 MHz operation at +85C without thermal throttling in plastic junction boxes.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF77T-I/ML — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF777T-I/ML | PIC16LF77-I/L | PIC16LF77T-I/L | PIC16LF777-I/ML | PIC16LF767-I/ML |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-pin QFN (ML) with EP | 44-pin QFN (ML) with EP - same | 44-pin PLCC (L) - differs mechanically | 44-pin PLCC (L) - differs mechanically | 44-pin QFN (ML) with EP - same | 44-pin QFN (ML) with EP - same |
| Program Memory (Flash) | 14 KB | 14 KB | 14 KB | 14 KB | 14 KB | 14 KB |
| Data RAM | 368 bytes | 368 bytes | 368 bytes | 368 bytes | 368 bytes | 368 bytes |
| Maximum Clock | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| I/O Pins | 33 | 33 | 33 | 33 | 33 | 33 |
| CCP Modules | 2 | 2 | 2 | 2 | 2 | 1 (fewer PWM channels) |
| LIN USART Support | Yes | Yes (enhanced) | Yes | Yes | Yes (enhanced) | No |
| Operating Voltage | 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 | 2.0 V to 5.5 V | 2.0 V to 5.5 V |
Key Differentiators
- Low-voltage 2.0 V operation for battery-powered designs (vs PIC16F877A)
- 44-pin QFN (ML) with exposed thermal pad (vs PIC16F877A in 44-PLCC)
- On-chip 256-byte EEPROM for data storage (vs External EEPROM solution)
- Enhanced LIN-capable USART for automotive body bus (vs PIC16LF767)
Design Notes
Place a 100 nF decoupling capacitor within 5 mm of every VDD pin and a bulk 10 uF tantalum or ceramic at the board supply entry. The 44-QFN exposes two VDD pins (26 and 38); both must be decoupled. Per the PIC16F7X datasheet, VDD rise time during power-on must be monotonic for proper BOR (brown-out reset) operation; add a small RC delay if the supply ramps too slowly.
The 44-QFN exposed pad must be soldered to a PCB thermal land that is thermally tied to the inner ground plane with multiple thermal vias. Estimated: at 20 MHz, VDD=5 V, and typical I/O toggling, current consumption is approximately 10-15 mA (50-75 mW). The exposed pad drops theta_JA to roughly 30 C/W, so junction rise is about 2.2 C above ambient - adequate for industrial -40C to +85C operation without derating.
Route the MCLR reset line away from switching nodes and high-current traces to prevent inadvertent resets from capacitive coupling. The ICSP pins (RB6/PGC, RB7/PGD) should each have a series resistor of 4.7 kohm in production circuits to allow in-circuit programming while preventing firmware from accidentally driving the programmer. Keep the OSC1/OSC2 traces short and surround them with a ground guard ring for noise immunity.
Do not leave the MCLR pin floating; tie it to VDD through a 10 kohm pull-up to allow normal operation, or to a supervisor circuit for production designs. Configure unused I/O as outputs driven low to minimize current consumption. The ADC requires the acquisition time to be programmed correctly based on source impedance; for 10 kohm sources or higher, use a longer Tacq or buffer with an op-amp.
Compliance Information
RoHS compliant per Microchip product page. Not AEC-Q100 qualified; for automotive applications choose AEC-Q100-graded PIC16F77-I/L variants. Lead-free reflow compatible (JEDEC J-STD-020).
