PIC17C44T-16I/PT - 16MHz 8-Bit OTP MCU, 44-TQFP | Microchip
N.º de pieza: PIC17C44T-16I/PT ✗ Fin de vida| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $9.95 | $9,95 |
| 10 | $8.95 | $89,50 |
| 100 | $7.85 | $785,00 |
| 500 | $6.95 | $3.475,00 |
| 1.000 | $6.2 | $6.200,00 |
PIC17C44T-16I/PT Descripción general
What is a PIC17C microcontroller? The PIC17C is Microchip's high-end 8-bit PIC architecture, one tier above the PIC16C family, designed for applications that demand more code space, more peripherals and higher throughput than mid-range PIC devices can offer while preserving the classic 5V CMOS simplicity. The architecture executes one instruction per cycle and targets 8.25 MIPS (121 ns instruction cycle) at 33 MHz maximum clock. Within Microchip's taxonomy, PIC17C sits between PIC16C (mid-range 8-bit) and PIC18F (enhanced 8-bit with self-programming Flash). It is supplied by the legacy "Mature Product" portfolio and has been superseded for new designs by the Flash-based PIC18F442, but remains widely available in distribution channels for industrial maintenance and legacy equipment.
Key features include 16 KB OTP program memory (one-time programmable - once written, the code is permanent and cannot be erased), 454 bytes of general-purpose SRAM, 33 I/O pins spread across multiple ports, a hardware USART for asynchronous/synchronous serial communication, an 8-bit PWM channel with programmable period and duty cycle, a 16-bit timer/counter, dual clock sources with selectable oscillator modes (RC, XT, HS, LP), a Watchdog Timer with its own on-chip RC oscillator for reliable operation, Power-On Reset and Brown-Out Reset, and a wide 4.5V-5.5V supply range. The TQFP-44 industrial temperature grade suits harsh factory-floor and outdoor embedded deployments.
From an architectural standpoint, the PIC17C44 uses a 16-bit instruction word (vs. 14-bit in PIC16C) which yields 8K x 16 instructions of code space and supports immediate data up to 16 bits, indirect addressing with FSR registers, and a hardware multiply assist path. The OTP memory is single-write per bit cell, providing ROM-like permanence with prototype-grade programming flexibility. The 33 I/O pins are distributed as PORTA (8 bits), PORTB (8 bits), PORTC (8 bits) and PORTD upper bits, supporting TTL/CMOS levels at 5V with source/sink capability of 20 mA per pin.
Typical applications include industrial automation controllers, motor control boards (the 8-bit PWM and 16-bit timer support closed-loop DC and stepper drives), HVAC thermostat and sensor interfaces, automotive aftermarket modules, point-of-sale terminals, legacy embedded data-acquisition front-ends, and intelligent sensor hubs. The wide 5V supply tolerance and industrial temperature rating make the PIC17C44 a practical choice for retrofitting older 5V-only industrial boards.
When designing with this device, mind the OTP program-memory constraint: code cannot be erased or rewritten, so OTP parts are typically used for production builds after code is frozen on a prototype Flash equivalent. Designers should prototype on the PIC17C44 JW (windowed EPROM) variant and validate firmware thoroughly before committing to OTP production. Verify supply voltage stays inside the 4.5V-5.5V window, keep Vpp decoupling within 1 cm of the IC, and observe the 20 mA per-pin I/O limit when driving relays or LEDs directly.
This page synthesizes distributor pricing, drop-in Microchip-family alternatives and practical design notes that are not aggregated on any single manufacturer or distributor page.
Alternativas directas para PIC17C44T-16I/PT — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con PIC17C44T-16I/PT (mismo factor de forma y huella) — difiere en Package, Core Architecture, Maximum Clock Frequency, Program Memory Type, Program Memory Size.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
PIC17C44-16I/PT
✅ Sustitución directa✓ En stock
$4.65 / unidad
Ver hoja de datos →PIC17C44-16I/PQ
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$15.5 / unidad
Ver hoja de datos →PIC17C44-16I/L
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$6.15 / unidad
Ver hoja de datos →PIC17C44-25I/PQ
✅ Sustitución directa✓ En stock
$9.85 / unidad
Ver hoja de datos →PIC17C43T-16/PT
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$8.7 / unidad
Ver hoja de datos →PIC17C44T-16I/PT Valores máximos y características eléctricas
| Core Architecture | PIC 8-bit (PIC17C family) |
| Program Memory Type | OTP (One-Time Programmable) EPROM |
| Program Memory Size | 16 KB (8K x 16 instructions) |
| RAM | 454 bytes |
| Frecuencia de reloj máxima | 16 MHz |
| Instruction Execution Throughput | 8.25 MIPS (121 ns/instruction at 33 MHz max) |
| Tensión de alimentación de funcionamiento | 4.5 V to 5.5 V |
| I/O Pins | 33 |
| Timers | 16-bit Timer/Counter (TMR0) |
| PWM Channels | 1 x 8-bit PWM |
| Communication | 1 x USART (async/sync serial) |
| Watchdog Timer | Yes (with dedicated on-chip RC oscillator) |
| Reset Circuit | POR (Power-On Reset), Brown-Out Reset |
| Oscillator Modes | RC, XT, HS, LP |
| Rango de temperatura de funcionamiento | -40 C to +85 C (Industrial grade, "I" suffix) |
| Encapsulado | 44-pin TQFP (10x10 mm), surface mount |
| Packaging Form | Tape & Reel (T suffix) |
Configuración de pines de PIC17C44T-16I/PT
| Pin 1 | MCLR#/VPP — Master Clear (active low) / Programming Voltage input |
| Pin 2 | RA0 — PORTA bit 0 (digital I/O) |
| Pin 3 | RA1 — PORTA bit 1 (digital I/O) |
| Pin 4 | RA2 — PORTA bit 2 (digital I/O) |
| Pin 5 | RA3 — PORTA bit 3 (digital I/O) |
| Pin 6 | RA4 — PORTA bit 4 (digital I/O / Timer0 gate) |
| Pin 7 | RA5 — PORTA bit 5 (digital I/O) |
| Pin 8 | RA6 — PORTA bit 6 (digital I/O) |
| Pin 9 | RA7 — PORTA bit 7 (digital I/O) |
| Pin 10 | OSC1 — Oscillator input (crystal/RC) |
| Pin 11 | OSC2 — Oscillator output (crystal) |
| Pin 12 | GND — Ground |
| Pin 13 | VDD — Positive supply (4.5V-5.5V) |
| Pin 14 | NC — Not connected |
| Pin 15 | RB0 — PORTB bit 0 (digital I/O / external interrupt) |
| Pin 16 | RB1 — PORTB bit 1 (digital I/O) |
| Pin 17 | RB2 — PORTB bit 2 (digital I/O) |
| Pin 18 | RB3 — PORTB bit 3 (digital I/O) |
| Pin 19 | RB4 — PORTB bit 4 (digital I/O) |
| Pin 20 | RB5 — PORTB bit 5 (digital I/O) |
| Pin 21 | RB6 — PORTB bit 6 (digital I/O / ICSP clock) |
| Pin 22 | RB7 — PORTB bit 7 (digital I/O / ICSP data) |
| Pin 23 | RC0 — PORTC bit 0 (digital I/O / PWM output) |
| Pin 24 | RC1 — PORTC bit 1 (digital I/O / Timer1 clock) |
| Pin 25 | RC2 — PORTC bit 2 (digital I/O / USART TX) |
| Pin 26 | RC3 — PORTC bit 3 (digital I/O / USART RX) |
| Pin 27 | RC4 — PORTC bit 4 (digital I/O) |
| Pin 28 | RC5 — PORTC bit 5 (digital I/O) |
| Pin 29 | RC6 — PORTC bit 6 (digital I/O) |
| Pin 30 | RC7 — PORTC bit 7 (digital I/O) |
| Pin 31 | NC — Not connected |
| Pin 32 | VDD — Positive supply (4.5V-5.5V) |
| Pin 33 | GND — Ground |
| Pin 34 | NC — Not connected |
| Pin 35 | NC — Not connected |
| Pin 36 | RD0 — PORTD bit 0 (digital I/O) |
| Pin 37 | RD1 — PORTD bit 1 (digital I/O) |
| Pin 38 | RD2 — PORTD bit 2 (digital I/O) |
| Pin 39 | RD3 — PORTD bit 3 (digital I/O) |
| Pin 40 | RD4 — PORTD bit 4 (digital I/O) |
| Pin 41 | RD5 — PORTD bit 5 (digital I/O) |
| Pin 42 | RD6 — PORTD bit 6 (digital I/O) |
| Pin 43 | RD7 — PORTD bit 7 (digital I/O) |
| Pin 44 | NC — Not connected |
Aplicaciones típicas
PIC17C44T-16I/PT es adecuado para 7 aplicacións: Industrial Automation Controllers, Motor Control Boards (PWM + Timer), HVAC Thermostat and Sensor Hubs, Point-of-Sale Terminals and Keypad Interfaces, Automotive Aftermarket Modules, Legacy Data-Acquisition Front-Ends, Retrofit Boards for Legacy Industrial Systems.
Industrial Automation Controllers
The PIC17C44T-16I/PT's 16 KB OTP memory and 33 digital I/O pins suit PLC-style logic controllers, conveyor sorters and machine-tool interfaces where firmware is frozen for production and 5V tolerance is required. The hardware USART handles RS-232/RS-485 master-slave polling to a host PLC, and the 16-bit timer/counter drives encoder input decoding for closed-loop motion. Its 4.5V-5.5V supply tolerance tolerates unregulated 24V industrial rails after a simple linear regulator.
Recomendado
Motor Control Boards (PWM + Timer)
The integrated 8-bit PWM channel and 16-bit timer/counter on the PIC17C44T-16I/PT drive brushed DC and unipolar stepper motor control loops with up to 33 I/O pins available for H-bridge gate signals, limit-switch inputs and quadrature feedback. The 16 MHz clock yields 4 MIPS, sufficient for PID loops at sub-millisecond update rates on small motors. Wide 5V supply tolerance suits 12V/24V motor-bus systems through a simple 7805 regulator.
Recomendado
HVAC Thermostat and Sensor Hubs
The PIC17C44T-16I/PT is well suited to legacy HVAC thermostats, environmental sensor hubs and building-automation nodes that require deterministic 5V CMOS I/O and a 16-bit timer for periodic temperature/humidity sampling. The 16 KB OTP can hold full HVAC state-machine firmware plus lookup tables for PID tuning. Industrial temperature grade (-40 C to +85 C) covers unconditioned rooftop and plant-floor enclosures.
Recomendado
Point-of-Sale Terminals and Keypad Interfaces
The PIC17C44T-16I/PT's 33 I/O pins can matrix-scan an 8x8 keypad and drive a character LCD, making it suitable for legacy point-of-sale terminals, secure keypad entry modules and PIN-pad controllers where deterministic 5V behavior and OTP code security matter. The hardware USART links to the host POS controller, while the 16 KB OTP holds firmware and encryption lookup tables without external memory.
Recomendado
Automotive Aftermarket Modules
Although not AEC-Q100 qualified, the PIC17C44T-16I/PT's industrial temperature rating (-40 C to +85 C) and rugged 5V CMOS I/O make it a practical MCU for automotive aftermarket accessories: alarm modules, gauge controllers, lighting controllers and OBD-II interfaces. The 16-bit timer and PWM channel drive LED dimming and tachometer pulse trains; the USART talks to OBD-II transceivers at 500 kbps. Verify EMC and load-dump compliance at the system level.
Recomendado
Legacy Data-Acquisition Front-Ends
The PIC17C44T-16I/PT pairs with an external ADC (e.g., MCP3201) over SPI bit-bang to form a compact 8-channel, 12-bit data-acquisition front-end for industrial sensors and process meters. The 16 KB OTP holds calibration tables and linearization coefficients, while the 454-byte RAM buffers sample blocks before USART transmission to a host PC. Industrial temperature grade supports outdoor or plant-floor installations.
Recomendado
Retrofit Boards for Legacy Industrial Systems
Many 1990s-2000s industrial machines shipped with the PIC17C44 as the system controller. The PIC17C44T-16I/PT in industrial-grade TQFP-44 is the canonical replacement for failed boards, allowing field-service engineers to swap a dead OTP part onto the original PCB without redesign. Same-family pin compatibility (PIC17C43, PIC17C42A) lets older machines with smaller code-space variants be upgraded by recompile.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para PIC17C44T-16I/PT — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | PIC17C44-16I/PT | PIC17C44-16I/PQ | PIC17C44-16I/L | PIC17C44-25I/PQ | PIC17C43T-16/PT |
|---|---|---|---|---|---|---|
| Package | TQFP-44 (10x10 mm) | TQFP-44 (10x10 mm) - same | TQFP-44 (10x10 mm) - same | TQFP-44 (10x10 mm) - same | TQFP-44 (10x10 mm) - same | TQFP-44 (10x10 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Maximum Clock | 16 MHz | 16 MHz | 16 MHz | 16 MHz | 25 MHz | 16 MHz |
| Program Memory | 16 KB OTP | 16 KB OTP | 16 KB OTP | 16 KB OTP | 16 KB OTP | 8 KB OTP |
| RAM | 454 bytes | 454 bytes | 454 bytes | 454 bytes | 454 bytes | 256 bytes |
| I/O Pins | 33 | 33 | 33 | 33 | 33 | 33 |
| Temperature Grade | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Commercial (0 to +70C) |
| Packaging Form | Tape & Reel | Tube/Tray | Tube/Tray | Tube/Tray | Tube/Tray | Tape & Reel |
| PWM Channels | 1 x 8-bit | 1 x 8-bit | 1 x 8-bit | 1 x 8-bit | 1 x 8-bit | 1 x 8-bit |
| USART | 1 | 1 | 1 | 1 | 1 | 1 |
Diferenciadores clave
- Highest program memory in TQFP-44 PIC17C family (frente a PIC17C43T-16/PT)
- Tape-and-reel packaging for SMD production (frente a PIC17C44-16I/PT)
- 16 MHz clock grade suited for general industrial timing (frente a PIC17C44-25I/PQ)
Notas de diseño
PIC17C44T-16I/PT requires a stable 4.5V-5.5V supply. Place a 100 nF decoupling capacitor within 1 cm of each VDD pin (pin 13 and pin 32), with a bulk 10 uF tantalum or electrolytic cap on the main 5V rail. The MCLR#/VPP pin (pin 1) needs its own 10 kohm pull-up to VDD; during ICSP programming VPP rises to ~13V, so add a clamping/isolating diode network if MCLR is also used as a reset button. Avoid voltage drops below 4.5V - the brown-out reset will trigger and the part will restart.
The TQFP-44 (10x10 mm, 0.8 mm pitch) requires careful PCB layout. Use 0.4 mm-wide traces with 0.2 mm clearance, and length-match the OSC1/OSC2 traces (pin 10/11) to within 2 mm of each other to keep crystal loading symmetric. Provide a continuous ground pour under the IC and stitch the perimeter with 0.3 mm vias on a 1 mm pitch. Keep the ICSP clock/data traces (RB6/RB7) short and away from switching nodes to avoid programming glitches.
Because the program memory is OTP (one-time programmable), once a part is programmed the firmware cannot be erased or rewritten. Always validate firmware on a windowed PIC17C44JW or a Flash equivalent (PIC18F442) before committing to OTP production. A misconfigured oscillator (e.g., HS mode selected with a 4 MHz RC oscillator) will cause the part to appear dead; the configuration word must be set to match the actual crystal. Watchdog Timer must be either enabled and serviced by firmware, or disabled in the configuration word - leaving it default-on will trigger unwanted resets.
Each PIC17C44T-16I/PT I/O pin can source or sink up to 20 mA (with a maximum of 200 mA total across all pins). When driving LEDs or relays directly, fit a base resistor or flyback diode. For PWM-driven motor control, route the PWM output (RC0/CCP) and timer inputs (RC1/T1CKI) as short differential pairs and place a 100 nF cap on the supply side of the H-bridge to suppress switching transients back into the MCU.
Información de cumplimiento
PIC17C44T-16I/PT is a Mature/NRND part from Microchip. RoHS, lead-free and halogen-free status were not in the provided Verified Web Data and are marked unknown - confirm with Microchip or the distributor's compliance documentation before using in RoHS-restricted markets. The part is NOT AEC-Q100 qualified; do not use in automotive safety-critical designs.
