PIC17C43-33/PT - 33MHz 8KB OTP 8-bit MCU, TQFP-44 | Microchip
Référence : PIC17C43-33/PT ✗ Fin de vie| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $14.5 | $14,50 |
| 10 | $13.1 | $131,00 |
| 100 | $11.65 | $1 165,00 |
| 500 | $10.4 | $5 200,00 |
| 1 000 | $9.3 | $9 300,00 |
PIC17C43-33/PT Présentation
The PIC17C43 belongs to the PIC17C family of high-performance 8-bit microcontrollers (a subfamily of the broader PIC microcontroller family, which in turn falls under the larger category of microcontroller -> embedded controller -> semiconductor). An 8-bit microcontroller integrates a CPU, RAM, ROM/EPROM, timers, and I/O peripherals on a single die, executing one instruction per instruction cycle (except program branches and table reads/writes which require two cycles) and offering deterministic timing that simplifies real-time control firmware design.
Key features of the PIC17C43-33/PT include 58 single-word instructions, a hardware multiplier for fast arithmetic, multiple timer/counter modules, a USART for serial communication, and a 16-level deep hardware stack. The device is OTP, meaning the program memory can be programmed once using an EPROM programmer and is non-volatile thereafter. Its PIC17C architecture is upwards source-compatible with the PIC16C and PIC12C families, easing migration paths for legacy designs.
This part is a member of Microchip's legacy PIC17C family, and Microchip recommends the PIC18F4220 as a newer Flash-based replacement for new designs. The PIC17C43-33/PT variant uses the commercial temperature grade (-40C to +70C operating range) and is supplied in 44-pin TQFP for surface-mount PCB assembly, while sibling parts exist in 40-pin PDIP (P), 44-pin PLCC (L), and 44-pin MQFP (PQ) packages.
Typical applications include industrial control systems, motor control front-ends, instrumentation front panels, legacy POS terminal controllers, and white-goods appliance electronics. With 8.25 MIPS compute throughput, it can handle closed-loop PID control at modest update rates, multi-channel UART bridging, and discrete logic replacement where deterministic instruction timing matters more than absolute throughput.
When designing with this OTP device, ensure firmware is fully validated against pre-programmed samples before committing to production volumes, since OTP parts cannot be reprogrammed or field-updated. Also verify that the chosen programmer supports the PIC17C43 OTP windowless device algorithm and that code density assumptions (58 instructions, 14-bit word) align with the available 8 KB of program memory.
This page synthesizes distributor pricing, drop-in same-package alternatives, application examples, and design notes not consolidated on the manufacturer product page. Engineers comparing the PIC17C43-33/PT against PIC18F or PIC16F migration candidates can use the comparison table below to identify the lowest-risk migration path.
Alternatives de remplacement direct pour PIC17C43-33/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 PIC17C43-33/PT (même facteur de forme et même empreinte) — différant par Package, Architecture, Maximum Clock Frequency, Program Memory Size, Program Memory Type.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
PIC17C43-33I/PT
✅ Remplacement direct✓ En stock
$8.85 / unité
Voir la fiche technique →PIC17C43-25E/PT
✅ Remplacement direct✓ En stock
$10.85 / unité
Voir la fiche technique →PIC17C42A-33/PT
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$9.65 / unité
Voir la fiche technique →PIC17C43-33/PQ
✅ Remplacement direct✓ En stock
$7.25 / unité
Voir la fiche technique →PIC17C43-33/L
✅ Remplacement direct✓ En stock
$8.95 / unité
Voir la fiche technique →PIC17C43-33/PT Valeurs maximales et caractéristiques électriques
| Architecture | PIC17C, 8-bit RISC |
| Instruction Set | 58 single-word instructions |
| Fréquence d'horloge maximale | 33 MHz |
| Instruction Cycle Time | 121 ns (single-cycle except branches and table R/W) |
| Performance | 8.25 MIPS |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 8 KB |
| Data RAM | 454 bytes |
| I/O Pins | 33 |
| Boîtier | TQFP-44 (10x10 mm, gull-wing) |
| Temperature Grade | Commercial (0C to +70C) |
| Hardware Stack Depth | 16 levels |
| Peripherals | USART, Timers, Hardware Multiplier, Capture/Compare/PWM |
| Architecture Family Compatibility | Upwards compatible with PIC16C and PIC12C families |
Configuration des broches de PIC17C43-33/PT
| Broche 1 | MCLR — Master Clear (reset) input, active-low |
| Broche 2 | RA0 — Port A bit 0 (digital I/O) |
| Broche 3 | RA1 — Port A bit 1 |
| Broche 4 | RA2 — Port A bit 2 |
| Broche 5 | RA3 — Port A bit 3 |
| Broche 6 | RA4 — Port A bit 4 (open-drain) |
| Broche 7 | RA5 — Port A bit 5 |
| Broche 8 | Vss — Ground reference |
| Broche 9 | OSC1 — Oscillator input / external clock |
| Broche 10 | OSC2 — Oscillator output (crystal mode) |
| Broche 11 | RC0 — Port C bit 0 |
| Broche 12 | RC1 — Port C bit 1 |
| Broche 13 | RC2 — Port C bit 2 / CCP1 |
| Broche 14 | RC3 — Port C bit 3 |
| Broche 15 | RC4 — Port C bit 4 |
| Broche 16 | RC5 — Port C bit 5 |
| Broche 17 | RC6 — Port C bit 6 / TX (USART) |
| Broche 18 | RC7 — Port C bit 7 / RX (USART) |
| Broche 19 | Vss — Ground reference |
| Broche 20 | Vdd — Positive supply voltage |
| Broche 21 | RB0 — Port B bit 0 (interrupt-on-change) |
| 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 — Port B bit 6 / ICP / programming clock |
| Broche 28 | RB7 — Port B bit 7 / programming data |
| Broche 29 | RD0 — Port D bit 0 (PSP data) |
| Broche 30 | RD1 — Port D bit 1 |
| Broche 31 | RD2 — Port D bit 2 |
| Broche 32 | RD3 — Port D bit 3 |
| Broche 33 | RD4 — Port D bit 4 |
| Broche 34 | RD5 — Port D bit 5 |
| Broche 35 | RD6 — Port D bit 6 |
| Broche 36 | RD7 — Port D bit 7 |
| Broche 37 | Vss — Ground reference |
| Broche 38 | Vdd — Positive supply voltage |
| Broche 39 | RE0 — Port E bit 0 |
| Broche 40 | RE1 — Port E bit 1 |
| Broche 41 | RE2 — Port E bit 2 |
| Broche 42 | NC — Not connected (per datasheet) |
| Broche 43 | NC — Not connected (per datasheet) |
| Broche 44 | NC — Not connected (per datasheet) |
Applications typiques
PIC17C43-33/PT convient pour 6 applications: Industrial Control Systems, Motor Control Front-Ends, Legacy POS Terminal Controllers, Instrumentation Front Panels, White-Goods Appliance Electronics, Embedded Serial Communication Bridges.
Industrial Control Systems
The PIC17C43-33/PT fits industrial control systems because its 8.25 MIPS throughput and deterministic 121 ns instruction cycle handle closed-loop PID control with predictable update rates. The 8 KB OTP program memory stores fixed control algorithms for motor starters, conveyor sequencers, and machine-tool controllers where firmware does not require field updates. With 33 digital I/O pins, the part directly interfaces to limit switches, solenoid drivers, encoder inputs, and 7-segment display multiplexers. Its hardware multiplier accelerates RMS and PI controller math without burdening the instruction stream. Designers integrate the 44-pin TQFP footprint with optocoupler-isolated I/O stages and 24V-to-5V regulator rails typical of factory-floor PLCs.
Recommandé
Motor Control Front-Ends
The PIC17C43-33/PT suits motor control front-ends because its Capture/Compare/PWM (CCP) peripherals generate precise PWM waveforms for brushed DC and stepper motor commutation. The 8.25 MIPS throughput at 33 MHz supports trapezoidal and sinusoidal commutation algorithms at switching frequencies up to 20 kHz. The hardware multiplier computes Park/Clarke transforms and PI loop coefficients in real time. With 454 bytes of RAM, the part holds state variables for current sensing, speed feedback, and fault handling. The 33 I/O pins connect to Hall-effect sensors, encoder quadrature inputs, gate-driver enable lines, and over-current comparator outputs.
Recommandé
Legacy POS Terminal Controllers
The PIC17C43-33/PT is found in legacy POS terminal and electronic cash register designs where its OTP memory prevents field code extraction and its deterministic instruction cycle simplifies Z80/8080 emulation layers. The 8 KB program memory stores keypad scan, LCD segment-driver, receipt-printer serial, and magnetic-stripe reader bit-banging routines. The 33 I/O pins drive 4x4 keypad matrices, 16-character vacuum-fluorescent displays, and serial UART lines to receipt printers. The 121 ns instruction cycle keeps keypad debounce and printer hand-shake timing within tight latency budgets.
Recommandé
Instrumentation Front Panels
The PIC17C43-33/PT powers instrumentation front panels because its USART and high I/O count handle multi-channel ADC readback, rotary encoder inputs, and dot-matrix LCD driving. The 8.25 MIPS throughput processes 12-bit ADC scans at 10 kHz per channel with hardware-averaged readings. With 454 bytes of RAM, the part stores calibration constants, last-reading buffers, and menu-navigation state machines. The 33 I/O pins interface to segmented LCDs, button matrices, status LEDs, and isolated RS-485 transceivers. The OTP memory locks the calibration signature at production, preventing field tampering with measurement references.
Recommandé
White-Goods Appliance Electronics
The PIC17C43-33/PT is used in white-goods appliance controllers (washing machines, dishwashers, microwave ovens) because its OTP memory locks proprietary wash-cycle algorithms and the 33 I/O pins drive relay arrays, triac gates, and user-interface panels. The 8.25 MIPS throughput manages multi-phase motor sequencing, water-level sensing, and thermistor-based temperature control loops. With deterministic 121 ns instruction cycles, the firmware precisely times triac zero-cross switching to minimize EMI. The commercial temperature grade (0C to +70C) suits indoor appliance environments, and the TQFP-44 package supports automated SMT assembly.
Recommandé
Embedded Serial Communication Bridges
The PIC17C43-33/PT serves as a multi-protocol serial bridge (RS-232 to RS-485, RS-232 to SPI, UART to I2C) because its USART plus bit-banged I/O implement multiple serial protocols concurrently. The 8.25 MIPS throughput sustains 115200 baud full-duplex throughput with protocol overhead, while 454 bytes of RAM buffers incoming/outgoing packets. With 33 I/O pins, the part exposes dedicated UART, SPI, and I2C pins alongside general-purpose lines for flow-control handshaking. The hardware multiplier accelerates CRC-16 calculations for industrial protocols such as Modbus RTU. Designers use this for legacy serial equipment modernization and protocol-converter gateways.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PIC17C43-33/PT — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | PIC17C43-33I/PT | PIC17C43-25E/PT | PIC17C42A-33/PT | PIC17C43-33/PQ | PIC17C43-33/L |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-44 | TQFP-44 - same | TQFP-44 - same | TQFP-44 - same | MQFP-44 - same pin count, different footprint | PLCC-44 - same pin count, different footprint |
| Maximum Clock Frequency | 33 MHz | 33 MHz | 25 MHz (-24%) | 33 MHz | 33 MHz | 33 MHz |
| Program Memory | 8 KB OTP | 8 KB OTP | 8 KB OTP | 4 KB OTP (-50%) | 8 KB OTP | 8 KB OTP |
| Data RAM | 454 bytes | 454 bytes | 454 bytes | 454 bytes | 454 bytes | 454 bytes |
| I/O Pins | 33 | 33 | 33 | 33 | 33 | 33 |
| Temperature Grade | Commercial (0C to +70C) | Industrial (-40C to +85C) | Extended (-40C to +125C) | Commercial (0C to +70C) | Commercial (0C to +70C) | Commercial (0C to +70C) |
| Lifecycle Status | NRND | NRND | NRND | NRND | NRND | NRND |
Principaux différenciateurs
- Industrial temperature grade option in same footprint (vs PIC17C43-33I/PT)
- Higher maximum clock frequency than 25 MHz sibling (vs PIC17C43-25E/PT)
- Larger program memory than PIC17C42A sibling (vs PIC17C42A-33/PT)
Notes de conception
The PIC17C43-33/PT is OTP (One-Time Programmable) - code cannot be erased or rewritten after programming. Always validate firmware on windowed PIC17C43 samples or development boards before committing to production volumes. Verify that the chosen programmer (MPLAB PM3, PICSTART Plus, or third-party equivalents) supports the PIC17C43 device algorithm with 13V Vpp programming voltage.
TQFP-44 packages have 0.8 mm pitch gull-wing leads that are sensitive to PCB solder-mask registration and pad design. Use NSMD (non-solder-mask-defined) pads with a 1:1 pad-to-lead ratio, and ensure the PCB copper-pour around the thermal pad (if present) does not create a solder-starvation condition. Add 0.1 uF decoupling capacitors on each Vdd pin (pin 20 and pin 38), placed within 3 mm of the IC package.
Estimated: At 33 MHz clock with all 33 I/O pins switching, the PIC17C43-33/PT consumes approximately 30-45 mA from Vdd. Provide a regulator with at least 100 mA headroom and 10 uF bulk capacitance plus 0.1 uF ceramic decoupling. The MCLR pin must be pulled high through a 10 kohm resistor with a 100 nF capacitor to ground for proper brown-out-reset behavior; do not leave MCLR floating.
TQFP-44 has a theta_JA of approximately 50-60 C/W on a standard 2-layer PCB with no thermal vias. At 35 mA supply current and 5V supply (0.175 W dissipation), the junction temperature rise above ambient is approximately 9-11 C, well within the 70C commercial limit. For industrial-grade (-40C to +85C) variants, derate accordingly and consider copper-pour thermal spreading for enclosed housings.
Informations de conformité
PIC17C43-33/PT is a legacy OTP part from the 1990s. RoHS, REACH, and lead-free status require confirmation from Microchip product page or full material declaration (FMD) - not explicitly stated in the verified distributor data. AEC-Q100 not applicable as this is a commercial-grade MCU.
