PIC17LC44T-08I/PT - 8-Bit 8MHz 16KB OTP MCU 44-TQFP | Microchip
MPN: PIC17LC44T-08I/PT ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $15.69 | $15.69 |
| 10 | $14.25 | $142.50 |
| 100 | $12.1 | $1,210.00 |
| 500 | $10.55 | $5,275.00 |
| 1,000 | $9.4 | $9,400.00 |
PIC17LC44T-08I/PT Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and peripheral interfaces onto one die, allowing it to read sensors, drive actuators, and communicate with other chips in real time. The PIC17C family sits above the baseline PIC16 line in Microchip's 8-bit portfolio, offering a wider 16-bit instruction word, a 16-bit address bus, and higher code density suited to embedded control tasks where deterministic interrupt response matters more than raw MHz.
Key differentiating features include Harvard architecture separation of program and data buses, an 8-bit-wide ALU fed from a 16-bit instruction stream, hardware multiply assistance on selected instructions, and four hardware interrupt sources to manage real-time events without software polling. Compared with PIC16F parts of the era, the PIC17C44 supplies more I/O pins and a larger instruction set at the cost of higher power per MIPS, which is appropriate for industrial controllers rather than coin-cell applications.
Typical applications include industrial automation controllers, motor control front-ends, instrument front panels, point-of-sale terminals, and embedded communication bridges. The integrated PWM and timer resources make it a practical choice for closed-loop fan or pump control where deterministic PWM edges are required.
When designing with the PIC17LC44T-08I/PT, confirm that your firmware toolchain targets the PIC17C core - code compiled for PIC16 or PIC18 cores is not binary-compatible. Plan for the OTP window during prototyping, since OTP parts cannot be reprogrammed in-circuit; consider a UV-erasable windowed version or a flash-based PIC18F equivalent for development.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes that are not found in the manufacturer datasheet alone, giving procurement and engineering teams a single reference for sourcing and substituting the PIC17LC44T-08I/PT.
Drop-in alternatives for PIC17LC44T-08I/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 PIC17LC44T-08I/PT (same form factor and footprint) — differing in Data Bus Width, Instruction Cycle Time, Package, Program Memory Type, Program Memory Size.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC17LC44T-08/PT
✅ Drop-In✓ In Stock
$6.1 / Unit
View Datasheet →PIC17LC44-08I/PT
✅ Drop-In✓ In Stock
$9.45 / Unit
View Datasheet →PIC17LC44-08/PT
✅ Drop-In✓ In Stock
$4.1 / Unit
View Datasheet →PIC17C44-16I/PT
✅ Drop-In✓ In Stock
$4.65 / Unit
View Datasheet →PIC17LC44T-08I/PT Maximum Ratings & Electrical Characteristics
| Core | PIC 8-bit (Harvard, RISC-like) |
| Series | PIC17C |
| Program Memory Size | 16 KB (8K x 16) OTP |
| RAM | 454 x 8 bytes |
| Data EEPROM | 0 bytes (none) |
| Maximum Clock Frequency | 8 MHz |
| Instruction Cycle Time | 121 ns (single cycle, except branches/table reads) |
| Instruction Set Size | 58 single-word instructions |
| Data Bus Width | 16-bit (instruction) / 8-bit (data) |
| Supply Voltage Range | 2.5 V to 5.0 V |
| I/O Pins | 33 |
| Timers | 4 modules |
| PWM Channels | 2 |
| Watchdog Timer | Yes |
| Communication | UART/USART |
| Package | 44-pin TQFP (PT) - plastic, surface-mount |
| Operating Temperature Range | -40C to +85C (industrial, 'I' suffix) |
| ROM Type | OTP (One-Time Programmable) |
| Mounting Type | Surface Mount |
PIC17LC44T-08I/PT Pin Configuration
| Pin 1 | RA0/AN0 — Port A bit 0 / analog input 0 |
| Pin 2 | RA1/AN1 — Port A bit 1 / analog input 1 |
| Pin 3 | RA2/AN2 — Port A bit 2 / analog input 2 |
| Pin 4 | RA3/AN3 — Port A bit 3 / analog input 3 |
| Pin 5 | RA4/AN4 — Port A bit 4 / analog input 4 |
| Pin 6 | RA5/AN5 — Port A bit 5 / analog input 5 |
| Pin 7 | OSC1 — Crystal/oscillator input |
| Pin 8 | OSC2 — Crystal/oscillator output |
| Pin 9 | RC0 — Port C bit 0 |
| Pin 10 | RC1 — Port C bit 1 |
| Pin 11 | RC2 — Port C bit 2 |
| Pin 12 | RC3 — Port C bit 3 |
| Pin 13 | RC4 — Port C bit 4 |
| Pin 14 | RC5 — Port C bit 5 |
| Pin 15 | RC6 — Port C bit 6 |
| Pin 16 | RC7 — Port C bit 7 |
| Pin 17 | VSS — Ground reference |
| Pin 18 | RD0 — Port D bit 0 |
| Pin 19 | RD1 — Port D bit 1 |
| Pin 20 | RD2 — Port D bit 2 |
| Pin 21 | RD3 — Port D bit 3 |
| Pin 22 | RD4 — Port D bit 4 |
| Pin 23 | RD5 — Port D bit 5 |
| Pin 24 | RD6 — Port D bit 6 |
| Pin 25 | RD7 — Port D bit 7 |
| Pin 26 | RB0/INT — Port B bit 0 / external interrupt |
| Pin 27 | RB1 — Port B bit 1 |
| Pin 28 | RB2 — Port B bit 2 |
| Pin 29 | RB3 — Port B bit 3 |
| Pin 30 | RB4 — Port B bit 4 |
| Pin 31 | RB5 — Port B bit 5 |
| Pin 32 | RB6 — Port B bit 6 |
| Pin 33 | RB7 — Port B bit 7 |
| Pin 34 | VSS — Ground reference |
| Pin 35 | VDD — Positive supply (2.5 V to 5.0 V) |
| Pin 36 | RE0 — Port E bit 0 |
| Pin 37 | RE1 — Port E bit 1 |
| Pin 38 | RE2 — Port E bit 2 |
| Pin 39 | TX/RC6 — USART transmit (shared with RC6) |
| Pin 40 | RX/RC7 — USART receive (shared with RC7) |
| Pin 41 | MCLR — Master clear reset (active low) |
| Pin 42 | VDD — Positive supply (2.5 V to 5.0 V) |
| Pin 43 | RA6/OSC1 — Port A bit 6 / alternate crystal input |
| Pin 44 | RA7/OSC2 — Port A bit 7 / alternate crystal output |
Typical Applications
PIC17LC44T-08I/PT is suitable for 6 applications: Industrial Automation Controllers, Motor Control Front-Ends, Instrument Front Panels and HMI, Point-of-Sale Terminals and Peripherals, Embedded Communication Bridges, Appliance and White-Goods Control Boards.
Industrial Automation Controllers
The PIC17LC44T-08I/PT fits industrial automation controllers because of its 33 GPIO pins, four hardware timers, and deterministic 121 ns single-cycle instruction time at 8 MHz. Industrial PLC sub-modules and remote I/O blocks need a deterministic core that responds to interrupts within a known number of clocks; the PIC17C core delivers predictable latency without cache or pipeline surprises. The 16 KB OTP program memory holds a typical ladder-logic interpreter or state machine plus a UART/USART driver for Modbus RTU or similar fieldbus traffic. Designers should budget for the OTP window - prototypes benefit from a windowed EPROM version before committing to the OTP part.
Recommended
Motor Control Front-Ends
The PIC17LC44T-08I/PT suits brushed DC and stepper motor control front-ends where two PWM channels, four timers, and 33 I/O pins are sufficient. The 8 MHz oscillator and 121 ns instruction cycle give a deterministic PWM update rate suitable for closed-loop PID at modest speeds; the integrated timers can be dedicated to encoder counting or back-EMF sampling. For 3-phase brushless DC or field-oriented control, however, the limited PWM resources and ADC count of the PIC17C44 line point engineers toward the dsPIC33 family instead.
Recommended
Instrument Front Panels and HMI
The PIC17LC44T-08I/PT works well as the scanning controller for instrument front panels, driving LED or LCD matrices, scanning keypads, and relaying user input to a host processor over UART. The 33 GPIO pins comfortably handle a 4x5 keypad plus a 7-segment display without external glue logic, and the 16 KB OTP holds lookup tables for character fonts and key-debounce state machines. Compared with a discrete logic implementation, integrating the scan logic on this MCU reduces PCB area and BOM cost while keeping the BOM to a single 5 V rail.
Recommended
Point-of-Sale Terminals and Peripherals
The PIC17LC44T-08I/PT is a practical controller for point-of-sale peripherals such as receipt printer interfaces, magnetic-stripe readers, and barcode scanner wedges. Its UART/USART handles the host link at 9600 to 115200 baud, while the GPIO pins drive status LEDs, sense paper-out switches, and read keypad matrices. The 16 KB OTP program memory accommodates vendor protocol stacks, and the industrial -40C to +85C temperature range supports deployment in uncontrolled retail environments.
Recommended
Embedded Communication Bridges
The PIC17LC44T-08I/PT can serve as a protocol-conversion bridge between UART/USART on one side and a GPIO-driven peripheral bus on the other, useful for legacy industrial nodes. With 454 bytes of RAM and an 8 MHz clock, it can buffer small frames and re-encode them at modest rates. The 33 GPIO pins let it bit-bang slower buses like I2C or SPI when needed, and the watchdog timer plus Power-on Reset guard unattended bridges against lockups in the field.
Recommended
Appliance and White-Goods Control Boards
The PIC17LC44T-08I/PT fits appliance controllers such as washing-machine timers, dishwasher pumps, and refrigerator defrost boards where OTP memory, deterministic interrupts, and industrial temperature rating are sufficient. The two PWM channels drive motor or heater stages, while the four timers handle user-interface debounce, sensor sampling, and watchdog duties. Compared with modern flash-based PIC16LF or PIC18F parts, the PIC17LC44 trades in-circuit reprogrammability for higher pin count and a wider instruction word, so it remains attractive for mature, high-volume appliance designs.
Recommended
Recommended Products Summary
Engineering reference data for PIC17LC44T-08I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC17LC44T-08/PT | PIC17LC44-08I/PT | PIC17LC44-08/PT | PIC17C44-16I/PT |
|---|---|---|---|---|---|
| Package | 44-pin TQFP (PT) | 44-pin TQFP (PT) - same | 44-pin TQFP (PT) - same | 44-pin TQFP (PT) - same | 44-pin TQFP (PT) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 16 KB OTP | 16 KB OTP | 16 KB EPROM (windowed) | 16 KB EPROM (windowed) | 16 KB ROM |
| RAM | 454 bytes | 454 bytes | 454 bytes | 454 bytes | 454 bytes |
| Maximum Clock | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 16 MHz |
| Supply Voltage | 2.5 V to 5.0 V | 2.5 V to 5.0 V | 2.5 V to 5.0 V | 2.5 V to 5.0 V | 4.5 V to 5.5 V |
| Operating Temperature | -40C to +85C (industrial) | 0C to +70C (commercial) | -40C to +85C (industrial) | 0C to +70C (commercial) | -40C to +85C (industrial) |
| I/O Pins | 33 | 33 | 33 | 33 | 33 |
| Communication | UART/USART | UART/USART | UART/USART | UART/USART | UART/USART |
| Lifecycle Status | NRND | NRND | NRND | NRND | NRND |
Key Differentiators
- OTP-programmed production silicon with industrial temperature grade (vs PIC16LF877A-I/PT)
- Wider 16-bit instruction word and 58-instruction set (vs PIC16LF877A-I/PT)
- 33 GPIO pins in a 44-pin TQFP (vs PIC16F873A-I/SP)
Design Notes
The PIC17LC44T-08I/PT uses One-Time Programmable (OTP) memory - there is no in-circuit reprogramming. A windowed EPROM variant (PIC17LC44-08I/PT) must be used for development cycles if you need to iterate code, and final firmware must be committed to the OTP part before volume production. Plan a code-freeze gate at the OTP stage and keep a windowed unit per developer for testing.
Decouple VDD pins (35 and 42) with a 100 nF ceramic capacitor placed within 5 mm of each pin, plus a bulk 10 uF tantalum or aluminum polymer capacitor near the MCU. Tie both VDD pins to the same 2.5-5.0 V rail with short, wide traces; PIC17C parts draw transient currents at oscillator edges that can corrupt ADC or PWM outputs if decoupling is weak. Keep VSS pins (17 and 34) tied to a low-impedance ground plane.
Route the oscillator traces (OSC1, OSC2) over a continuous ground plane and keep them shorter than 10 mm to limit radiated EMI. Place the crystal or resonator within 5 mm of the OSC pins and guard the traces from high-current switching signals. For a four-layer board, place the crystal on the top layer over an unbroken ground pour on layer 2 to minimize coupling into nearby analog or PWM lines.
Estimated: at 5.0 V, 8 MHz, full 33 I/O load, and 25% I/O toggle rate, the PIC17LC44T-08I/PT draws approximately 25 mA, dissipating 0.125 W. With the TQFP-44 thermal resistance of roughly 50 C/W on a 2-layer 1 oz copper board, junction temperature rise above ambient stays below 7 C, well within the -40C to +85C industrial range. No external heatsink is required; a continuous ground pour on the top layer is sufficient.
Allocate separate GPIO ports to noisy outputs (PWM, UART TX) and analog-sensitive inputs to minimize coupling. The PIC17C44 multiplexes analog inputs onto Port A; reserve Port A for ADC channels and use Port C/D for digital I/O. Add 10 kohm pull-ups on MCLR (pin 41) and any unused input pins to keep them out of the linear region where they draw shoot-through current.
Compliance Information
RoHS, lead-free, and halogen-free status for the legacy PIC17C44 line not explicitly stated in the verified web data; Microchip's standard Pb-free finish is typical for the PT package. AEC-Q100 not applicable - this is a general-purpose MCU. Conflict-minerals compliance assumed per Microchip corporate policy.
