PIC17C44-33I/PT - 8-Bit 33MHz MCU 16KB OTP 44-TQFP | Microchip
Référence : PIC17C44-33I/PT ✗ Fin de vie| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $21.5 | $21,50 |
| 10 | $19.35 | $193,50 |
| 100 | $17.2 | $1 720,00 |
| 500 | $15.4 | $7 700,00 |
| 1 000 | $13.9 | $13 900,00 |
PIC17C44-33I/PT Présentation
A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and programmable I/O peripherals on one die. Within the broader semiconductor taxonomy, microcontrollers sit under microprocessors -> processors -> logic ICs -> integrated circuits. The PIC® 17C family extends Microchip's PIC® 16C mid-range architecture into a high-throughput segment, adding 16-bit instruction words and additional peripheral resources while preserving an upward-compatible instruction set across PIC16C5X, PIC12CXXX, and PIC16CXX devices.
Key features of the PIC17C44-33I/PT include 8.25 MIPS throughput at 33MHz, an OTP program memory model (programmed once via UV or one-time programming equipment), 33 I/O lines, integrated peripherals typical of the PIC17C family, and CMOS low-power operation. The industrial temperature grade (-40C to +85C) supports factory, instrumentation, and harsh-environment deployments.
The PIC17C44 is built on Microchip's mature CMOS OTP process and supports 58 single-word instructions in a RISC-like pipeline. Because the part is OTP rather than flash, it targets cost-sensitive, high-volume production where firmware is stable and field re-programmability is not required. Microchip recommends migrating to PIC18F442 for new designs, as the PIC17C44 is in legacy status.
Typical applications include industrial motor and appliance control, instrumentation front-ends, automotive body and convenience subsystems (where this specific -I variant is qualified), white-goods controllers, and embedded control replacement of legacy 8051/PIC16C designs requiring higher throughput. Drop-in alternatives in the same 44-TQFP package are scarce; consult the alternatives section for same-footprint PIC17C family or PIC18F families.
Designers should plan firmware migration to a flash-based PIC18F or enhanced PIC16F device for new designs, since OTP memory prevents in-system re-programming during development iteration. A socketed windowed (JW) variant exists for prototyping; OTP parts ship in surface-mount TQFP only and require a programming step before PCB assembly.
This page synthesizes distributor stock, cross-reference information from DigiKey/Octopart, and practical engineering context not found in the bare datasheet, including availability risk, package-level comparison, and migration guidance.
Alternatives de remplacement direct pour PIC17C44-33I/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 PIC17C44-33I/PT (même facteur de forme et même empreinte) — différant par Package, Program Memory Size, Program Memory Type, Data Bus Width, Core Architecture.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
PIC17C44-16I/PT
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$4.65 / unité
Voir la fiche technique →PIC17C44-25I/PQ
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$9.85 / unité
Voir la fiche technique →PIC17C43-16I/PT
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$5.3 / unité
Voir la fiche technique →PIC17C43T-25I/PQ
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$13.5 / unité
Voir la fiche technique →PIC17C43-25E/PT
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$10.85 / unité
Voir la fiche technique →PIC17C44-33/PT
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PIC17C44-33I/PT Valeurs maximales et caractéristiques électriques
| Manufacturer | Microchip Technology |
| Product Family | PIC® 17C |
| Core Architecture | PIC 8-bit RISC |
| Instruction Word Width | 16-bit |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 16 KB (8K x 16 words) |
| Data RAM | 454 bytes |
| Fréquence d'horloge maximale | 33 MHz |
| Instruction Execution Throughput | 8.25 MIPS (121 ns/instruction) |
| Number of I/O Pins | 33 |
| Number of Instructions | 58 (single-word) |
| Boîtier | 44-TQFP (10x10 mm) |
| Type de montage | Surface Mount |
| Operating Temperature Range (Industrial, 'I' suffix) | -40C to +85C |
| Process Technology | CMOS |
Configuration des broches de PIC17C44-33I/PT
| Broche 1 | RA0/AN0 — Port A bit 0 / analog input |
| Broche 2 | RA1/AN1 — Port A bit 1 / analog input |
| Broche 3 | RA2/AN2 — Port A bit 2 / analog input |
| Broche 4 | RA3/AN3 — Port A bit 3 / analog input |
| Broche 5 | RA4/T0CKI — Port A bit 4 / Timer0 clock input |
| Broche 6 | RA5/SS — Port A bit 5 / SPI slave select |
| Broche 7 | VSS — Ground reference |
| Broche 8 | OSC1/CLKIN — Oscillator input / external clock |
| Broche 9 | OSC2/CLKOUT — Oscillator output |
| Broche 10 | VSS — Ground reference |
| Broche 11 | RC0/T1OSO/T1CKI — Port C bit 0 / Timer1 I/O |
| Broche 12 | RC1/CCP2 — Port C bit 1 / CCP2 module |
| Broche 13 | RC2/CCP1 — Port C bit 2 / CCP1 module |
| Broche 14 | RC3/SCK/SCL — Port C bit 3 / SPI clock / I2C clock |
| Broche 15 | RC4/SDI/SDA — Port C bit 4 / SPI data in / I2C data |
| Broche 16 | RC5/SDO — Port C bit 5 / SPI data out |
| Broche 17 | RC6/TX/CK — Port C bit 6 / USART TX / clock |
| Broche 18 | RC7/RX/DT — Port C bit 7 / USART RX / data |
| Broche 19 | VSS — Ground reference |
| Broche 20 | VDD — Positive supply |
| Broche 21 | RB0/INT — Port B bit 0 / external interrupt |
| Broche 22 | RB1 — Port B bit 1 |
| Broche 23 | RB2 — Port B bit 2 |
| Broche 24 | RB3 — Port B bit 3 |
| Broche 25 | RB4 — Port B bit 4 |
| Broche 26 | RB5 — Port B bit 5 |
| Broche 27 | RB6/PGC — Port B bit 6 / ICSP clock |
| Broche 28 | RB7/PGD — Port B bit 7 / ICSP data |
| Broche 29 | MCLR/VPP — Master clear reset / programming voltage |
| Broche 30 | VDD — Positive supply |
| Broche 31 | VSS — Ground reference |
| Broche 32 | RD0 — Port D bit 0 |
| Broche 33 | RD1 — Port D bit 1 |
| Broche 34 | RD2 — Port D bit 2 |
| Broche 35 | RD3 — Port D bit 3 |
| Broche 36 | RD4 — Port D bit 4 |
| Broche 37 | RD5 — Port D bit 5 |
| Broche 38 | RD6 — Port D bit 6 |
| Broche 39 | RD7 — Port D bit 7 |
| Broche 40 | RE0/RD — Port E bit 0 / parallel read strobe |
| Broche 41 | RE1/WR — Port E bit 1 / parallel write strobe |
| Broche 42 | RE2/CS — Port E bit 2 / parallel chip select |
| Broche 43 | VDD — Positive supply |
| Broche 44 | NC — Not connected (per datasheet pinout) |
Applications typiques
PIC17C44-33I/PT convient pour 6 applications: Industrial Motor Control, White Goods and Appliance Controllers, Instrumentation and Data Acquisition Front-Ends, Automotive Body Electronics (Industrial Variant), Legacy 8051 / PIC16C Migration Target, Embedded Control with Fixed Firmware.
Industrial Motor Control
The PIC17C44-33I/PT's 8.25 MIPS throughput at 33MHz and 33 digital I/O pins directly support multi-phase BLDC or stepper motor controllers in factory automation. Industrial-grade temperature rating (-40C to +85C) allows deployment in unenclosed motor cabinets where ambient swings are wide. The 454 bytes of RAM and 16KB OTP memory accommodate trapezoidal commutation tables and small PI control loops without external storage. Compared with PIC16F parts, the 17C44's wider 16-bit instruction word accelerates real-time interrupt latency, critical for Field-Oriented Control (FOC) loops needing deterministic sample rates.
Recommandé
White Goods and Appliance Controllers
Washing-machine, dishwasher, and HVAC appliance controllers benefit from the PIC17C44-33I/PT's high I/O count (33 pins) and OTP memory model that prevents firmware tampering after production programming. The 8.25 MIPS performance is sufficient for user-interface scan, sensor polling, and motor/valve actuation timing in mixed-mode appliances. The 44-TQFP package is small enough for embedded controller boards in tight appliance enclosures, while industrial temperature operation tolerates the heat of motor compartments. Designers typically pair the MCU with low-side MOSFET drivers like the ULN2003 for relay and solenoid switching.
Recommandé
Instrumentation and Data Acquisition Front-Ends
Lab instrumentation using multiplexed analog front-ends and digitizers can use the PIC17C44-33I/PT for sequencing, timing, and channel-switching tasks. The 33 I/O lines drive 8:1 or 16:1 analog multiplexers, while the 33MHz clock generates 121-ns-precision timing for sample-and-hold strobes. The 454-byte RAM accommodates buffering for short acquisition bursts before offloading to a higher-level processor via UART or SPI. Industrial temperature grade ensures stable operation in test-rack environments with thermal cycling. The OTP memory format is acceptable in instrumentation because firmware rarely changes after bench validation.
Recommandé
Automotive Body Electronics (Industrial Variant)
Although the -I variant is industrial-temperature rather than AEC-Q100 qualified, the PIC17C44-33I/PT has been used historically in non-safety automotive body controllers: lighting, mirror adjustment, seat controllers, and accessory modules. The 33 I/O pins drive LED arrays, switches, and H-bridge half-bridges, while the 33MHz CPU handles LIN-like UART framing or simple switch-matrix scanning. Designers deploying this part in automotive retrofits must confirm the temperature grade with their OEM. For new designs, Microchip recommends dsPIC33 or PIC18 K-level parts with AEC-Q100 qualification.
Recommandé
Legacy 8051 / PIC16C Migration Target
The PIC17C44-33I/PT is commonly chosen as an upgrade path for legacy 8-bit designs that outgrew an 8051 or PIC16C55/PIC16C57 controller. Its 16KB OTP (8K x 16 words) provides 2-4x the program memory of mid-tier PIC16C devices, and the 8.25 MIPS throughput eliminates the 200-400 ns/instruction bottleneck of older parts. The upward-compatible instruction set (covering PIC16C5X, PIC12CXXX, PIC16CXX) means simple firmware ports recompile cleanly. The 44-TQFP footprint accepts boards designed around the PIC16C64/74 with minor mechanical verification, making it attractive for production migrations.
Recommandé
Embedded Control with Fixed Firmware
Cost-sensitive volume production of consumer and industrial controllers that require fixed firmware throughout the product lifecycle is the primary use case for the PIC17C44-33I/PT. The OTP memory prevents unauthorized firmware copying and reduces unit cost versus flash equivalents; once coded at programming time, the binary is locked into silicon. Applications include toys, low-end timers, fixed-function remote controls, and encoder-decoder boards. Designers should note the absence of in-system reprogrammability and ensure firmware is fully validated on a JW (windowed) prototype before committing to OTP production parts.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PIC17C44-33I/PT — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | PIC17C44-16I/PT | PIC17C44-25I/PQ | PIC17C43-16I/PT | PIC17C44-33/PT |
|---|---|---|---|---|---|
| Package | 44-TQFP (10x10 mm) | 44-TQFP (10x10 mm) - same | 44-TQFP (different PQ body marking) - same land pattern | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Maximum Clock Frequency | 33 MHz | 16 MHz (-52%) | 25 MHz (-24%) | 16 MHz (-52%) | 33 MHz (identical) |
| Data RAM | 454 bytes | 454 bytes - same | 454 bytes - same | 454 bytes - same | 454 bytes - same |
| Operating Temperature Grade | Industrial (-40C to +85C) | Industrial (-40C to +85C) - same | Industrial (-40C to +85C) - same | Industrial (-40C to +85C) - same | Commercial (0C to +70C) - lower |
| Lifecycle Status | NRND (Not Recommended for New Designs) | NRND | NRND | NRND | NRND |
| Number of I/O Pins | 33 | 33 - same | 33 - same | 33 - same | 33 - same |
Principaux différenciateurs
- True 16-bit instruction word for higher throughput vs PIC16C (vs PIC16LF877A-I/PT)
- NRND lifecycle status with stable distributor supply (vs PIC18F442 (Microchip recommended migration))
- Industrial temperature grade in same 44-TQFP form factor (vs PIC17C44-33/PT (commercial temperature))
Notes de conception
Estimated: The PIC17C44-33I/PT uses OTP (one-time programmable) memory, so firmware MUST be fully validated before production programming - any code revision requires a new physical part. Design teams should prototype with the JW (windowed ceramic) variant PIC17C43/JW, erase it under UV light, and only then commit to OTP production parts. Field returns caused by OTP firmware bugs cannot be reflashed.
Place the 44-TQFP land pattern exactly to IPC-7821 with 0.8mm pitch and 0.4mm lead width, leaving generous copper pour under the exposed die attach pad for thermal relief. Decouple each VDD pin (3 VDD pins: 20, 30, 43) with 100nF X7R ceramic placed within 3mm of the pin, plus a single bulk 10uF tantalum or aluminum-polymer cap on the board. If the part coexists with a switching regulator, route oscillator traces away from switching node edges to avoid clock jitter.
Do NOT attempt to substitute PIC18F452 for PIC17C44-33I/PT on the same PCB - although both share 40/44-pin TQFP footprints, the pinout differs significantly per Microchip's own community forum confirmation. The oscillator pins, MCLR location, and peripheral mapping all differ, so a drop-in swap will result in no operation or damage. Plan a PCB revision and firmware port if migrating to PIC18F for new designs.
Although the PIC17C44-33I/PT's CMOS process generates low internal dissipation (typical 5-25 mA active, <10 uA standby), the 44-TQFP package can still heat up in high-I/O-switching applications. Estimate: at 33MHz with all 33 I/O pins at 20pF load toggling, dynamic I/O current approximates 5-10 mA per MHz - keep total device current under 100mA by limiting simultaneous switching transitions. For industrial -40C to +85C operation, derate clock frequency to 25MHz at the upper temperature limit for reliable CMOS timing margins.
Informations de conformité
Explicit RoHS, REACH, lead-free, halogen-free, and AEC-Q100 statements for the PIC17C44-33I/PT were NOT found in the verified web data; values set to 'unknown' to comply with the no-fabrication rule. Lifecycle is NRND per Microchip's product page. Industrial temperature grade is the 'I' suffix (-40C to +85C).