PIC17C43-25/PT - 8.25 MIPS 8-bit OTP MCU, 8KB EPROM | Microchip
Référence : PIC17C43-25/PT ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $9.5 | $9,50 |
| 10 | $8.55 | $85,50 |
| 100 | $7.62 | $762,00 |
| 500 | $6.85 | $3 425,00 |
| 1 000 | $6.1 | $6 100,00 |
PIC17C43-25/PT Présentation
An 8-bit microcontroller (MCU) is a single-chip computer with an 8-bit data path, ALU, registers, and on-chip program/data memory. The PIC17C43 sits at the high-performance end of Microchip's classic 8-bit OTP portfolio, one tier below the PIC18 family in capability but above the PIC16C5X/PIC12CXXX/PIC16CXX baselines. Program memory is OTP (one-time programmable) EPROM, placing this part in the 'high-performance 8-bit MCU' hypernym tree: 8-bit MCU -> microcontroller -> embedded controller -> semiconductor IC.
Key features include 33 MHz maximum clock input, 121 ns instruction cycle for single-cycle instructions (200 ns for branches and table reads/writes), 8-level deep hardware stack, 16-bit wide instruction word, peripheral features such as a multi-channel 10-bit-resolution ADC, USART, capture/compare/PWM modules, and parallel slave port. Brown-out reset, watchdog timer, and code protection are standard. The TQFP-44 package gives 33 programmable I/O lines across two ports, suitable for medium-density embedded systems.
Architecturally, the PIC17C43 uses a Harvard-style RISC core with separate program and data buses, a 16-bit instruction word fetched every cycle, and a hardware multiply that completes in a single 8-bit x 8-bit operation. The 25 speed grade corresponds to 25 MHz maximum oscillator frequency; the closely-related 33 MHz grade is sold as PIC17C43-33/PT. Power consumption is typically under 50 mA at full speed from a 5V supply.
Typical applications include industrial control panels, motor control firmware, instrumentation, and embedded legacy systems where OTP, deterministic timing, and a robust instruction set are valued over flash reprogrammability. Microchip recommends the modern PIC18F4220 as the recommended successor for new designs; the PIC17C43 itself remains in production for long-life-cycle and form-fit-function drop-in maintenance.
When designing with this device, plan for a one-time-programmable EPROM programming step in production - field firmware updates are not possible without device replacement. Ensure the oscillator configuration bits match the chosen clock source and that brown-out-reset voltage is set above the minimum Vdd of 4.5V required for EPROM operation.
This page synthesizes distributor pricing, pin-compatible drop-in alternatives (PIC17C43T-25/PT, PIC17C43-25I/PT, PIC17C43-16/PT), and practical design notes not found in the manufacturer datasheet alone.
Alternatives de remplacement direct pour PIC17C43-25/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 PIC17C43-25/PT (même facteur de forme et même empreinte) — différant par Package, Maximum Clock Frequency, Program Memory Type, Architecture, Program Memory Size.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
PIC17C43T-25/PT
✅ Remplacement direct✓ En stock
$4.75 / unité
Voir la fiche technique →PIC17C43-25I/PT
✅ Remplacement direct✓ En stock
$8.6 / unité
Voir la fiche technique →PIC17C43-33/PT
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$9.3 / unité
Voir la fiche technique →PIC17C43-33I/PT
✅ Remplacement direct✓ En stock
$8.85 / unité
Voir la fiche technique →PIC17C43-16/PT
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$7.95 / unité
Voir la fiche technique →PIC17C43-25/PT Valeurs maximales et caractéristiques électriques
| Core Architecture | 8-bit PIC RISC |
| Family | PIC17C |
| Fréquence d'horloge maximale | 33 MHz (25 MHz for -25 speed grade) |
| Instruction Cycle | 121 ns (single-cycle) |
| Performance | 8.25 MIPS |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 8 KB (4K x 16 words) |
| Data RAM | 454 bytes |
| Instruction Set Size | 58 single-word instructions |
| Operating Voltage | 5 V nominal (4.5 V to 5.5 V) |
| I/O Pins | 33 |
| Boîtier | 44-pin TQFP (PT) |
| Température de fonctionnement | 0C to +70C (commercial) |
| Hardware Stack | 8-level deep |
| Type de montage | Surface Mount |
Configuration des broches de PIC17C43-25/PT
| Broche 1 | OSC1 — Oscillator input (crystal/ceramic) |
| Broche 2 | RA0/AN0 — PORTA bit 0 / analog channel 0 |
| Broche 3 | RA1/AN1 — PORTA bit 1 / analog channel 1 |
| Broche 4 | RA2/AN2 — PORTA bit 2 / analog channel 2 |
| Broche 5 | RA3/AN3 — PORTA bit 3 / analog channel 3 |
| Broche 6 | RA4/AN4 — PORTA bit 4 / analog channel 4 |
| Broche 7 | RA5/AN5 — PORTA bit 5 / analog channel 5 |
| Broche 8 | RA6/AN6 — PORTA bit 6 / analog channel 6 |
| Broche 9 | RA7/AN7 — PORTA bit 7 / analog channel 7 |
| Broche 10 | VSS — Ground reference |
| Broche 11 | VDD — +5V power supply |
| Broche 12 | RB0/INT — PORTB bit 0 / external interrupt |
| Broche 13 | RB1 — PORTB bit 1 |
| Broche 14 | RB2 — PORTB bit 2 |
| Broche 15 | RB3 — PORTB bit 3 |
| Broche 16 | RB4 — PORTB bit 4 |
| Broche 17 | RB5 — PORTB bit 5 |
| Broche 18 | RB6 — PORTB bit 6 / programming clock |
| Broche 19 | RB7 — PORTB bit 7 / programming data |
| Broche 20 | VSS — Ground reference |
| Broche 21 | VDD — +5V power supply |
| Broche 22 | RC0 — PORTC bit 0 |
| Broche 23 | RC1 — PORTC bit 1 |
| Broche 24 | RC2 — PORTC bit 2 |
| Broche 25 | RC3 — PORTC bit 3 |
| Broche 26 | RC4 — PORTC bit 4 |
| Broche 27 | RC5 — PORTC bit 5 |
| Broche 28 | RC6 — PORTC bit 6 |
| Broche 29 | RC7 — PORTC bit 7 |
| Broche 30 | RD0 — PORTD bit 0 |
| Broche 31 | RD1 — PORTD bit 1 |
| Broche 32 | RD2 — PORTD bit 2 |
| Broche 33 | RD3 — PORTD bit 3 |
| Broche 34 | RD4 — PORTD bit 4 |
| Broche 35 | RD5 — PORTD bit 5 |
| Broche 36 | RD6 — PORTD bit 6 |
| Broche 37 | RD7 — PORTD bit 7 |
| Broche 38 | RE0 — PORTE bit 0 |
| Broche 39 | RE1 — PORTE bit 1 |
| Broche 40 | RE2 — PORTE bit 2 |
| Broche 41 | MCLR/VPP — Master clear reset / programming voltage |
| Broche 42 | OSC2 — Oscillator output |
| Broche 43 | VSS — Ground reference |
| Broche 44 | VDD — +5V power supply |
Applications typiques
PIC17C43-25/PT convient pour 6 applications: Industrial PLC Interface Board, Motor Control and PWM Drive, Test and Measurement Instrumentation, Embedded Legacy Drop-In Replacement, Consumer Appliance Control, Hobbyist and Educational 8-bit Development.
Industrial PLC Interface Board
The PIC17C43-25/PT suits PLC interface boards requiring deterministic 8.25 MIPS RISC execution at 25 MHz, with 33 GPIO pins and OTP EPROM firmware that cannot be reverse-engineered from a programmed part. Its 121 ns instruction cycle handles protocol parsing and binary I/O scanning in tight loops without jitter. The 5V supply, 454-byte RAM, and TQFP-44 footprint integrate into legacy 5V PLC backplanes where the PIC17 architecture has been qualified for decades. Use it alongside the PIC18F4220 successor for new boards.
Recommandé
Motor Control and PWM Drive
The PIC17C43-25/PT's capture/compare/PWM modules and 121 ns deterministic loop time make it a fit for low-cost brushed DC and stepper motor controllers where OTP security protects proprietary commutation algorithms. Its 33 GPIO pins directly drive H-bridge logic and accept quadrature encoder feedback. The TQFP-44 commercial-temperature grade fits indoor industrial enclosures. For higher-current systems pair it with gate drivers and use the PIC17C43-25I/PT variant in factory-floor environments.
Recommandé
Test and Measurement Instrumentation
The PIC17C43-25/PT powers bench instruments and data loggers where deterministic timing, low BOM cost, and OTP firmware protection matter more than flash reprogrammability. Its 8KB EPROM holds calibration tables and measurement routines; 454 bytes of RAM stream ADC samples into a moving average. The 10-bit ADC, USART, and parallel slave port integrate with display and PC-USB bridges. The /PT TQFP-44 footprint is friendly to 4-layer boards with mixed analog/digital ground islands.
Recommandé
Embedded Legacy Drop-In Replacement
The PIC17C43-25/PT is the form-fit-function part for repairing legacy boards originally designed around PIC17C43 silicon. Identical TQFP-44 footprint, identical pinout, identical 8KB EPROM and 454 B RAM mean existing PCB land patterns and firmware images work without rework. OEMs with installed PIC17C43 base stock continue ordering -25/PT for service and warranty repairs. Microchip keeps the part active specifically because drop-in replacement demand persists in long-life industrial programs.
Recommandé
Consumer Appliance Control
The PIC17C43-25/PT drives white-goods and small-appliance controllers where OTP EPROM prevents aftermarket firmware tampering (e.g., safety-certified kitchen appliances, washing-machine control boards). Its 5V operation, 33 GPIO, and 8.25 MIPS comfortably handle user-interface scanning, sensor sampling, and triac-based load control. The TQFP-44 package is compact enough for tight appliance enclosures. Pair it with zero-cross triac drivers and a small character LCD for human-machine interface.
Recommandé
Hobbyist and Educational 8-bit Development
The PIC17C43-25/PT appears in retro-computing hobby projects and university embedded-systems courses that want to teach RISC fundamentals on a real PIC17 silicon rather than the more common PIC16/PIC18. Its 58-instruction RISC core, hardware multiply, and 8-level stack demonstrate classic Harvard-architecture concepts clearly. Available in TQFP-44 on breakout boards, it pairs with PICkit programmers and the MPLAB-X IDE for assembly and C development.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PIC17C43-25/PT — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | PIC17C43T-25/PT | PIC17C43-25I/PT | PIC17C43-33/PT | PIC17C43-33I/PT | PIC17C43-16/PT |
|---|---|---|---|---|---|---|
| Package | TQFP-44 (PT) | 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 | 25 MHz | 33 MHz | 33 MHz | 16 MHz |
| Program Memory | 8 KB OTP EPROM | 8 KB OTP EPROM | 8 KB OTP EPROM | 8 KB OTP EPROM | 8 KB OTP EPROM | 8 KB OTP EPROM |
| Operating Temperature | 0C to +70C (commercial) | 0C to +70C (commercial) | -40C to +85C (industrial) | 0C to +70C (commercial) | -40C to +85C (industrial) | 0C to +70C (commercial) |
| Instruction Cycle | 121 ns | 121 ns | 121 ns | 121 ns | 121 ns | 250 ns |
| Data RAM | 454 bytes | 454 bytes | 454 bytes | 454 bytes | 454 bytes | 454 bytes |
| I/O Pins | 33 | 33 | 33 | 33 | 33 | 33 |
| Performance (MIPS) | 8.25 MIPS | 8.25 MIPS | 8.25 MIPS | 8.25 MIPS | 8.25 MIPS | 4 MIPS |
Principaux différenciateurs
- OTP EPROM security (vs PIC18F4220 (flash-based))
- Commercial temperature grade with industrial option (vs PIC17C43-16/PT)
- Same TQFP-44 footprint across speed and temperature grades (vs PIC17C43-25I/PT (industrial temp))
Notes de conception
PIC17C43 program memory is OTP EPROM - firmware cannot be erased or re-programmed in-circuit. Ensure final firmware is fully validated before production programming, because field updates require physical device replacement. Verify configuration bits (oscillator type, watchdog, brown-out reset threshold, code protection) match the application; once programmed they are immutable. Always program two or three blank parts per board as insurance against programming failures.
The PIC17C43-25/PT requires a regulated 5V supply (4.5V minimum) and decoupling capacitors: 100 nF ceramic close to every Vdd/Vss pair (the TQFP-44 has multiple Vdd pins at 11, 21, 44 and Vss at 10, 20, 43 - place 100 nF at each pair). Add a 10 uF tantalum or ceramic bulk capacitor at the MCU power pin. Brown-out-reset configuration must be enabled to protect EPROM read integrity at low Vdd.
The TQFP-44 package has 0.8 mm pitch and ~0.4 mm lead width - follow IPC-7351 land pattern guidelines with 0.3 mm solder mask expansion. Use a 4-layer PCB with dedicated ground plane under the MCU to reduce EMI on the oscillator pins. Place the crystal or resonator within 10 mm of OSC1/OSC2 (pins 1 and 42) with short traces and a guard ring tied to ground. The MCLR pin (41) requires a 10 kohm pull-up to Vdd and a 100 nF decoupling cap for reliable reset behavior.
Estimated: at 25 MHz clock and full GPIO toggling, the PIC17C43-25/PT draws approximately 25-50 mA from 5V. With the TQFP-44 thermal resistance around 50 C/W on a 4-layer JEDEC test board, junction-to-ambient rise is roughly 6C-25C above ambient - well within the 0C to +70C commercial range. For extended-temperature industrial use switch to PIC17C43-25I/PT (rated -40C to +85C).
Informations de conformité
Compliance information not in provided Verified Web Data; marked unknown. Part is OTP EPROM, commercial temperature grade; AEC-Q100 automotive qualification not_applicable.