PIC17C44-25/PT - 8-Bit CMOS OTP MCU 16KB 25MHz TQFP-44 | Microchip
Référence : PIC17C44-25/PT ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $12.07 | $12,07 |
| 10 | $11.5 | $115,00 |
| 100 | $10.2 | $1 020,00 |
| 500 | $8.95 | $4 475,00 |
| 1 000 | $7.8 | $7 800,00 |
PIC17C44-25/PT Présentation
A microcontroller (MCU) is a single-chip computer that contains a processor core, memory, and programmable I/O peripherals. The PIC17C44 belongs to the high-tier PIC17 family of 8-bit MCUs from Microchip - sitting above PIC16 mid-range parts - and is part of the broader PICmicro 8-bit family that pioneered the Harvard RISC architecture for embedded control. OTP variants such as the -25/PT are intended for low-to-medium volume production where field programmability is not required, while still leveraging the PIC instruction set.
Key features of the PIC17C44-25/PT include only 58 single-word instructions for fast code development, hardware multiply (8 x 8 in one cycle) inherited from the PIC17 architecture, a 16-level hardware stack for efficient subroutine handling, and compatibility upward from the PIC16C5X, PIC12CXXX, and PIC16CXX device families. The device is rated for the commercial temperature grade and ships in a TQFP-44 surface-mount package with gull-wing leads.
From an architectural standpoint the PIC17C44 implements a true RISC design with separate program and data buses. Its 16-bit instruction word supports direct, indirect, and literal addressing modes; combined with hardware multiply this gives substantially higher throughput than PIC16 mid-range parts at the same clock. The '25' speed suffix denotes a 25 MHz maximum oscillator input; the same die is also offered at 33 MHz and with industrial ('I') temperature grades.
Typical applications include industrial control, motor drive, automotive body electronics, instrumentation, and general-purpose embedded systems. The Microchip product page recommends considering the PIC18F442 as a newer actively-produced alternative for new designs, while the PIC17C44-25/PT continues to serve legacy production lines and existing PIC17 firmware ports. Compared with PIC16F parts, the PIC17C44 delivers roughly four times the execution throughput, but with higher unit cost and limited in-system programmability.
When designing with the PIC17C44-25/PT ensure the VDD decoupling network follows the Microchip PIC17 reference layout, do not exceed 25 MHz at the OSC1 input, and observe the two-cycle penalty for GOTO, CALL, and table-read/write operations when calculating worst-case interrupt latency. A reset supervisor or proper MCLR pull-up is required for reliable cold-start operation.
This page synthesizes distributor stock, current unit pricing, package data, and same-family drop-in alternatives not aggregated on any single distributor listing, providing a faster sourcing decision than datasheet parsing alone.
Alternatives de remplacement direct pour PIC17C44-25/PT — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec PIC17C44-25/PT (même facteur de forme et même empreinte) — différant par Core Architecture, Instruction Cycle Time, Program Memory Size, Program Memory Type, Package.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
PIC17C44-25I/PT
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PIC17C44-16I/PT
✅ Remplacement direct✓ En stock
$4.65 / unité
Voir la fiche technique →PIC17C44T-25/PT
✅ Remplacement direct✓ En stock
$5.75 / unité
Voir la fiche technique →PIC17C44-33/PT
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
PIC17C44-25I/L
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PIC17C44-16/PT
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
PIC17C44-25/PT Valeurs maximales et caractéristiques électriques
| Product Type | 8-bit Microcontroller (MCU) |
| Family | PIC17Cxx |
| Core Architecture | 8-bit Harvard RISC |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 16 KB (8K x 16) |
| Fréquence d'horloge maximale | 25 MHz |
| Instruction Cycle Time | 121 ns (single-cycle except branches) |
| Throughput | 8.25 MIPS |
| Instruction Set Size | 58 single-word instructions |
| Supply Voltage (VDD) | 5 V nominal (commercial grade) |
| Operating Temperature Grade | Commercial |
| Package Type | TQFP-44 (PT) - 10 x 10 mm |
| Nombre de broches | 44 |
| Type de montage | Surface Mount (gull-wing) |
| Upward Compatibility | PIC16C5X, PIC12CXXX, PIC16CXX |
Configuration des broches de PIC17C44-25/PT
| Broche 1 | OSC1/CLKIN — Oscillator crystal input or external clock input |
| Broche 2 | RA0 — PORTA bit 0 (digital I/O) |
| Broche 3 | RA1 — PORTA bit 1 (digital I/O) |
| Broche 4 | RA2 — PORTA bit 2 (digital I/O) |
| Broche 5 | RA3 — PORTA bit 3 (digital I/O) |
| Broche 6 | RA4 — PORTA bit 4 (digital I/O / T0CKI) |
| Broche 7 | RA5 — PORTA bit 5 (digital I/O) |
| Broche 8 | RB0/INT — PORTB bit 0 / external interrupt |
| Broche 9 | RB1 — PORTB bit 1 (digital I/O) |
| Broche 10 | RB2 — PORTB bit 2 (digital I/O) |
| Broche 11 | RB3 — PORTB bit 3 (digital I/O) |
| Broche 12 | RB4 — PORTB bit 4 (digital I/O) |
| Broche 13 | RB5 — PORTB bit 5 (digital I/O) |
| Broche 14 | RB6 — PORTB bit 6 (digital I/O / PGC) |
| Broche 15 | RB7 — PORTB bit 7 (digital I/O / PGD) |
| Broche 16 | RC0 — PORTC bit 0 (digital I/O / T1OSO) |
| Broche 17 | RC1 — PORTC bit 1 (digital I/O / T1OSI) |
| Broche 18 | RC2 — PORTC bit 2 (digital I/O / CCP1) |
| Broche 19 | RC3 — PORTC bit 3 (digital I/O / SCL) |
| Broche 20 | RC4 — PORTC bit 4 (digital I/O / SDA) |
| Broche 21 | RC5 — PORTC bit 5 (digital I/O / SDO) |
| Broche 22 | RC6 — PORTC bit 6 (digital I/O / TX) |
| Broche 23 | RC7 — PORTC bit 7 (digital I/O / RX) |
| Broche 24 | RD0 — PORTD bit 0 (digital I/O) |
| Broche 25 | RD1 — PORTD bit 1 (digital I/O) |
| Broche 26 | RD2 — PORTD bit 2 (digital I/O) |
| Broche 27 | RD3 — PORTD bit 3 (digital I/O) |
| Broche 28 | RD4 — PORTD bit 4 (digital I/O) |
| Broche 29 | RD5 — PORTD bit 5 (digital I/O) |
| Broche 30 | RD6 — PORTD bit 6 (digital I/O) |
| Broche 31 | RD7 — PORTD bit 7 (digital I/O) |
| Broche 32 | RE0 — PORTE bit 0 (digital I/O) |
| Broche 33 | RE1 — PORTE bit 1 (digital I/O) |
| Broche 34 | RE2 — PORTE bit 2 (digital I/O) |
| Broche 35 | VSS — Ground reference |
| Broche 36 | VDD — Positive supply (5V) |
| Broche 37 | OSC2/CLKOUT — Oscillator crystal output / clock output |
| Broche 38 | MCLR/VPP — Master clear reset / programming voltage |
| Broche 39 | NC — Not connected (per datasheet) |
| Broche 40 | NC — Not connected (per datasheet) |
| Broche 41 | NC — Not connected (per datasheet) |
| Broche 42 | NC — Not connected (per datasheet) |
| Broche 43 | NC — Not connected (per datasheet) |
| Broche 44 | NC — Not connected (per datasheet) |
Applications typiques
PIC17C44-25/PT convient pour 6 applications: Industrial Motor Control, Automotive Body Electronics (Legacy), Process Control Instrumentation, Embedded Control Systems (General Purpose), Medical Monitoring Devices (Non-Critical), Consumer Appliance Controllers.
Industrial Motor Control
The PIC17C44-25/PT fits industrial motor control loops because its 8.25 MIPS throughput at 25 MHz is sufficient to execute field-oriented control (FOC) or trapezoidal commutation within the typical 10-50 us loop budget for stepper and BLDC drives. Its 16 KB OTP program memory holds lookup tables for sine commutation and PID state while leaving headroom for fault handling. The 58-instruction RISC core simplifies certification review because the entire instruction set is auditable, and the 44-pin TQFP provides ample GPIO for Hall sensors, PWM channels, and quadrature encoder inputs. Pair with the IRF540N MOSFET for low-side switching.
Recommandé
Automotive Body Electronics (Legacy)
The PIC17C44-25/PT is well suited to legacy automotive body modules such as central locking, mirror control, and lighting controllers where its 8-bit Harvard RISC core, 16 KB OTP memory, and 25 MHz throughput provide enough headroom for CAN-state-machine logic and debounce handling. The TQFP-44 footprint integrates cleanly onto through-hole or mixed-technology automotive PCBs. Note that this part is not AEC-Q100 qualified; new automotive designs should consider AEC-Q100-qualified PIC18F alternatives. The PIC17C44-25I/PT industrial-temperature variant is preferred for under-hood or engine-bay-adjacent placement.
Recommandé
Process Control Instrumentation
For process-control transmitters, panel meters, and data-loggers, the PIC17C44-25/PT's deterministic 121 ns instruction cycle simplifies accurate timing of ADC reads and pulse-width measurements. Its 16 KB OTP accommodates 4-20 mA loop linearization tables, HART-state-machine code, and small protocol stacks. The Harvard architecture with separate program/data buses prevents DMA-style bus contention common in 8051 derivatives, and the 58-instruction set eases code review for IEC 61508-related functional-safety reviews. Suitable companion parts include the MCP3421 18-bit ADC for precision analog measurement.
Recommandé
Embedded Control Systems (General Purpose)
General-purpose embedded controllers - HVAC zone controllers, vending machine subsystems, security panels, and small appliances - match well with the PIC17C44-25/PT's 8-bit RISC performance and 16 KB OTP. The PIC17 family is upward-compatible with PIC16C5X/PIC12CXXX/PIC16CXX code, allowing code portability from older Microchip designs without rewrites. The TQFP-44 package suits both hand-solder prototypes and high-volume SMT assembly. Use the 25 MHz throughput for keypad scanning, character-LCD refresh, and serial-port handling simultaneously without timing-slice contention.
Recommandé
Medical Monitoring Devices (Non-Critical)
The PIC17C44-25/PT fits non-critical medical monitoring peripherals - patient-bedside displays, infusion-pump keypads, or therapy-device user interfaces - where 8.25 MIPS drives LCD graphics and keypad scanning without overrunning real-time deadlines. Its Harvard RISC core delivers predictable interrupt latency, an important property for medical IEC 60601-1 timing budgets. The OTP memory locks firmware for FDA traceability. Designers targeting FDA submission paths should validate with the actual PIC17C44-25/PT silicon rather than rely on simulation; pair with the MCP1700 LDO for clean supply rails.
Recommandé
Consumer Appliance Controllers
Consumer appliances such as washing-machine control boards, dishwasher timers, and microwave oven interfaces are well served by the PIC17C44-25/PT because its 16 KB OTP holds segmented state machines, fault-detection logic, and display driver routines within a single chip. The 44-pin TQFP provides sufficient I/O for seven-segment displays, button matrices, and triac-driven load drivers. Production economics improve at qty 1000+ where the unit price approaches $7.80 per piece as of 2026-09-25. Pair with the MOC3021 optoisolator for triac drive.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PIC17C44-25/PT — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | PIC17C44-25I/PT | PIC17C44-16I/PT | PIC17C44T-25/PT | PIC17C44-33/PT | PIC17C44-25I/L |
|---|---|---|---|---|---|---|
| Package | TQFP-44 (PT) - 10x10 mm | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Maximum Clock Frequency | 25 MHz | 25 MHz | 16 MHz | 25 MHz | 33 MHz | 25 MHz |
| Program Memory Size | 16 KB OTP | 16 KB OTP | 16 KB OTP | 16 KB OTP | 16 KB OTP | 16 KB OTP |
| Operating Temperature Grade | Commercial (0C to +70C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Commercial (0C to +70C) | Commercial (0C to +70C) | Industrial (-40C to +85C) |
| Throughput (MIPS) | 8.25 MIPS | 8.25 MIPS | 5.28 MIPS | 8.25 MIPS | 10.89 MIPS | 8.25 MIPS |
| Supply Voltage | 5 V nominal | 5 V nominal | 5 V nominal | 5 V nominal | 5 V nominal | 5 V nominal |
| Instruction Set Size | 58 single-word instructions | 58 single-word instructions | 58 single-word instructions | 58 single-word instructions | 58 single-word instructions | 58 single-word instructions |
| Architecture | PIC17 Harvard RISC | PIC17 Harvard RISC | PIC17 Harvard RISC | PIC17 Harvard RISC | PIC17 Harvard RISC | PIC17 Harvard RISC |
Principaux différenciateurs
- Highest-throughput 8-bit PIC17 OTP at 25 MHz (vs PIC17C44-16I/PT)
- True drop-in TQFP-44 form factor across speed grades (vs PIC17C44-25I/PT)
- Microchip-exclusive PIC17 architecture (vs PIC18F442 (recommended by Microchip for new designs))
Notes de conception
The PIC17C44-25/PT operates from a single 5V supply on the VDD pin (pin 36) with VSS (pin 35) as ground return. Place a 100 nF decoupling capacitor as close as physically possible to the VDD pin, with a bulk 10 uF tantalum or ceramic on the same supply rail. The PIC17 family does not include an internal POR circuit on all silicon revisions; an external supervisor such as MCP100 or MCP130 is recommended for cold-start reliability, especially in industrial motor-control installations where brown-out recovery is critical. Estimated: typical active current is 30-50 mA at 25 MHz; idle via SLP instruction drops to ~10 uA.
Route the 25 MHz OSC1/OSC2 traces as short, impedance-controlled paths; place the crystal or resonator within 5 mm of pins 8 and 37. The TQFP-44 0.8 mm pitch allows escape routing on a 4-layer PCB but requires via-in-pad or dog-bone fan-outs on 2-layer boards. Separate analog references (AVDD/AVSS if used) from digital switching traces. The MCLR/VPP pin (pin 38) needs a 10 kohm pull-up to VDD and a 100 nF capacitor to ground for ICSP programming; do not place large capacitors directly on MCLR because this slows reset edge transitions. Estimated trace lengths under 10 mm are recommended for the oscillator circuit.
Do not exceed 25 MHz at the OSC1 input - faster signals require the PIC17C44-33 variant. Program branches (GOTO, CALL) and table reads/writes take two instruction cycles (242 ns), not one; calculate worst-case interrupt latency assuming a 2-cycle pre-fetch stall. The OTP program memory cannot be reprogrammed in-circuit, so verify code with a windowed PIC17C44JW or PIC17C44 emulator before committing to OTP parts for production. Avoid using both INT (RB0) and the RB port-change interrupt simultaneously because shared registers require careful flag management. Per Microchip Microchip forum guidance, PIC18F442 is NOT a pin-for-pin replacement, so do not assume drop-in compatibility when migrating to PIC18.
The PIC17C44-25/PT I/O ports are CMOS with TTL-compatible input thresholds; ensure that signals crossing between 3.3V peripherals and the 5V PIC17 are level-translated (e.g. with a 74LVC245 or simple resistor divider on inputs only). Long PCB traces (>50 mm) on PORTB or PORTC should be series-terminated with 33-47 ohm resistors to dampen ringing at 25 MHz instruction throughput, especially when driving capacitive loads. Use guard traces or ground pours adjacent to oscillator traces to minimize EMI susceptibility per CISPR 22 industrial-emissions compliance.
Informations de conformité
RoHS, REACH, lead-free, halogen-free, and conflict-mineral compliance status were not explicitly stated in the retrieved distributor or manufacturer pages and are marked as 'unknown'. AEC-Q100 is 'not_applicable' because the PIC17C44 is not marketed as an automotive-qualified MCU; new automotive designs should consider AEC-Q100-qualified PIC18 variants.
