PIC17C43-16I/L - 8-Bit 16MHz 8KB OTP MCU 44-PLCC | Microchip
Référence : PIC17C43-16I/L ✗ Fin de vie| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $15.4 | $15,40 |
| 10 | $14.2 | $142,00 |
| 100 | $12.5 | $1 250,00 |
| 250 | $11.8 | $2 950,00 |
| 500 | $11.1 | $5 550,00 |
PIC17C43-16I/L Présentation
A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory (ROM/Flash/OTP), working RAM, and programmable I/O peripherals. The PIC17C family is Microchip's high-end 8-bit architecture, predating the PIC18F series, and is built around a RISC instruction set with only 58 single-word instructions to simplify development while retaining advanced peripherals. The 17C43 sits at the top of the PIC17C family with the largest OTP memory and is positioned for industrial automation, motor control, and instrumentation where deterministic interrupt response and rich I/O are required.
Key features of the PIC17C43-16I/L include 16 MHz maximum operating frequency, 4.5 V to 6 V supply voltage range, 33 I/O pins, hardware multiply, multiple timer/counter modules, and a USART. The industrial temperature grade (-40C to +85C, indicated by the "I" suffix) and PLCC-44 package suit through-hole or socketed industrial designs and legacy field-replacement scenarios. The "L" suffix denotes the PLCC J-lead package rather than the PDIP "P" option.
Architecturally, the PIC17C43 uses an enhanced Harvard architecture with separate program and data buses, enabling simultaneous instruction fetch and data access. The 16-bit instruction word combined with an 8-bit data path gives a 2:1 code density advantage over traditional 8-bit CISC MCUs while keeping the 8-bit peripheral model familiar to PIC developers migrating from PIC16.
Typical applications include industrial motor control (BLDC, stepper, servo drives), factory automation controllers, HVAC control boards, security and access control panels, instrumentation front-ends, and legacy embedded systems requiring long-life-cycle support. The OTP memory and industrial temp grade make it well-suited for mature production runs where firmware is finalized and per-unit programming is acceptable.
When designing with the PIC17C43-16I/L, verify that your firmware-development toolchain (MPASM assembler, MPLAB IDE legacy versions) supports the PIC17C family. Microchip recommends migrating to PIC18F4220 for new designs, as PIC17C43 is an older family nearing end-of-life. For socketed legacy boards, the PLCC-44 footprint remains pin-compatible with several PIC17C42A and PIC17C43 speed-grade variants, simplifying field replacement.
Alternatives de remplacement direct pour PIC17C43-16I/L — 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 PIC17C43-16I/L (même facteur de forme et même empreinte) — différant par Program Memory Type, Program Memory Size, RAM Size, Maximum Clock Frequency, Operating Temperature.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
PIC17C43-16/L
✅ Remplacement direct✓ En stock
$5.1 / unité
Voir la fiche technique →PIC17C43/JW
✅ Remplacement direct✓ En stock
$10.95 / unité
Voir la fiche technique →PIC17C43-16I/L Valeurs maximales et caractéristiques électriques
| Product Family | PIC 17C |
| Core | 8-bit PIC RISC |
| Instruction Set Width | 16-bit |
| Largeur du bus de données | 8-bit |
| Number of Instructions | 58 single-word |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 8 KB (4K x 16 words) |
| RAM Size | 454 bytes |
| Fréquence d'horloge maximale | 16 MHz |
| Performance | 8.25 MIPS (121 ns instruction cycle) |
| Supply Voltage Range | 4.5 V to 6 V |
| Number of I/O Pins | 33 |
| Plage de température de fonctionnement | -40C to +85C (Industrial) |
| Boîtier | 44-pin PLCC (J-Lead), 16.59 x 16.59 mm |
| Type de montage | Surface Mount |
Configuration des broches de PIC17C43-16I/L
| Broche 1 | RA0 — Port A bit 0 / analog input |
| Broche 2 | RA1 — Port A bit 1 / analog input |
| Broche 3 | RA2 — Port A bit 2 / analog input |
| Broche 4 | RA3 — Port A bit 3 / analog input |
| Broche 5 | RA4 — Port A bit 4 |
| Broche 6 | RA5 — Port A bit 5 |
| Broche 7 | RA6 — Port A bit 6 |
| Broche 8 | RA7 — Port A bit 7 |
| Broche 9 | RB0 — Port B bit 0 / external interrupt |
| Broche 10 | RB1 — Port B bit 1 |
| Broche 11 | RB2 — Port B bit 2 |
| Broche 12 | RB3 — Port B bit 3 |
| Broche 13 | RB4 — Port B bit 4 |
| Broche 14 | RB5 — Port B bit 5 |
| Broche 15 | RB6 — Port B bit 6 / programming clock |
| Broche 16 | RB7 — Port B bit 7 / programming data |
| Broche 17 | VDD — Positive supply voltage (4.5V-6V) |
| Broche 18 | VSS — Ground reference |
| Broche 19 | OSC1 — Crystal oscillator input |
| Broche 20 | OSC2 — Crystal oscillator output |
| Broche 21 | RC0 — Port C bit 0 / USART TX |
| Broche 22 | RC1 — Port C bit 1 / USART RX |
| Broche 23 | RC2 — Port C bit 2 |
| Broche 24 | RC3 — Port C bit 3 |
| Broche 25 | RC4 — Port C bit 4 |
| Broche 26 | RC5 — Port C bit 5 |
| Broche 27 | RC6 — Port C bit 6 |
| Broche 28 | RC7 — Port C bit 7 |
| Broche 29 | RD0 — Port D bit 0 |
| 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 | RE0 — Port E bit 0 |
| Broche 38 | RE1 — Port E bit 1 |
| Broche 39 | RE2 — Port E bit 2 |
| Broche 40 | MCLR — Master clear reset (active low) |
| Broche 41 | VDD — Positive supply voltage (4.5V-6V) |
| Broche 42 | VSS — Ground reference |
| Broche 43 | RF0 — Port F bit 0 |
| Broche 44 | RF1 — Port F bit 1 |
Applications typiques
PIC17C43-16I/L convient pour 6 applications: Industrial Motor Control, Factory Automation Controllers, HVAC Control Boards, Security and Access Control Panels, Test and Measurement Instrumentation, Legacy Embedded System Replacement.
Industrial Motor Control
The PIC17C43-16I/L fits industrial motor control because its 16 MHz clock delivers 8.25 MIPS with deterministic interrupt latency, while 33 I/O pins drive multi-phase PWM, encoder feedback, and current-sensing channels for BLDC or stepper drives. The 8 KB OTP memory holds commutation tables, PID loops, and fault handlers; the 454-byte RAM suffices for control variables. The 4.5-6 V supply aligns with industrial 5 V rails, and the -40C to +85C industrial temp grade survives factory-floor thermal stress. Compared with PIC16F parts, the PIC17C43's 16-bit instruction width and hardware multiply accelerate torque-loop math, but for new designs Microchip recommends migrating to PIC18F4520 or dsPIC33 for active lifecycle support.
Recommandé
Factory Automation Controllers
The PIC17C43-16I/L is well-suited for PLC-style factory automation controllers because it integrates 33 I/O for digital sensors, relays, and HMI interfaces, plus 8 KB OTP for ladder-logic-equivalent control code and recipe storage. The 16 MHz RISC core provides deterministic scan times critical for sequential control loops, while the USART enables RS-485 networking to distributed I/O blocks. The 44-pin PLCC J-lead package supports socketed designs for rapid field replacement on production lines. The 454-byte RAM is tight for data logging, so designers typically pair the MCU with external EEPROM. New automation designs should consider PIC18F4520 or PIC18F4620 for Flash reprogrammability during commissioning.
Recommandé
HVAC Control Boards
The PIC17C43-16I/L serves HVAC control boards because its 16 MHz core handles PID temperature loops, multi-stage compressor sequencing, and blower-speed control within deterministic timing budgets. The 33 I/O pins connect to thermistor inputs via ADC, triac drivers for compressor contactors, and serial links to indoor-unit displays. The 8 KB OTP stores seasonal-mode logic and diagnostic tables, while the 454-byte RAM handles setpoint buffers and sensor averaging. The -40C to +85C industrial temp range tolerates equipment-room environments. Compared with PIC16F877A, the PIC17C43 offers more I/O and faster math; for new HVAC designs, PIC18F46K22 with Flash is preferred.
Recommandé
Security and Access Control Panels
The PIC17C43-16I/L fits security and access control panels because its 8 KB OTP stores credential databases, anti-passback logic, and event-log formatting, while 33 I/O connect to card readers, door strikes, and alarm-zone inputs. The 16 MHz core executes encryption routines and keypad-scan debouncing within tight response times. The industrial -40C to +85C rating ensures reliability in unheated vestibules and outdoor enclosures. The 454-byte RAM is sufficient for concurrent reader handling and temporary buffer storage. Designers should migrate to PIC18F46J50 or PIC24FJ64GA004 for Flash-based firmware updates when regulatory changes require field upgrades.
Recommandé
Test and Measurement Instrumentation
The PIC17C43-16I/L supports bench-top instrumentation because its 16 MHz core, 58-instruction RISC set, and 8 KB OTP enable measurement firmware with floating-point math libraries, calibration constants, and front-panel menus. The 33 I/O drive LCD modules, rotary encoders, function keys, and analog-mux channels. The 4.5-6 V supply matches bench-instrument rails, and the 44-pin PLCC package suits through-hole prototyping boards. The 454-byte RAM supports averaging buffers and waveform captures; designers often add external SRAM for data logging. New instrumentation should use PIC18F4550 or dsPIC33EP for USB connectivity and active support.
Recommandé
Legacy Embedded System Replacement
The PIC17C43-16I/L is the canonical choice for legacy embedded system replacement because it shares the 44-pin PLCC footprint with the entire PIC17C family, allowing socketed drop-in substitution when original parts fail. The 8 KB OTP accommodates identical firmware builds, and the 16 MHz speed grade preserves timing margins of legacy code. The industrial temp grade matches original factory-automation and HVAC deployments. Stock at distributors (e.g., 4,368 pieces at Heisener as of 2026-09-25) supports field service for years to come. For board redesigns where firmware must change, PIC18F4220 in a different package requires PCB rework but offers Flash reprogrammability.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PIC17C43-16I/L — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | PIC17C43-16/L | PIC17C43/JW | PIC17C43-33I/L | PIC17C42A-16/L |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-PLCC (J-Lead) | 44-PLCC (J-Lead) - same | 44-PLCC (windowed ceramic) - same footprint | 44-PLCC (J-Lead) - same | 44-PLCC (J-Lead) - same |
| Core / Architecture | 8-bit PIC17C RISC | 8-bit PIC17C RISC | 8-bit PIC17C RISC | 8-bit PIC17C RISC | 8-bit PIC17C RISC |
| Max Clock Frequency | 16 MHz | 16 MHz | 16 MHz | 33 MHz | 16 MHz |
| I/O Pins | 33 | 33 | 33 | 33 | 33 |
| Supply Voltage | 4.5 V to 6 V | 4.5 V to 6 V | 4.5 V to 6 V | 4.5 V to 6 V | 4.5 V to 6 V |
| Temperature Grade | Industrial -40C to +85C | Commercial 0C to +70C | Industrial -40C to +85C | Industrial -40C to +85C | Commercial 0C to +70C |
| Lifecycle Status | NRND | NRND | NRND | NRND | NRND |
Principaux différenciateurs
- Largest OTP memory in PIC17C family (vs PIC17C42A-16/L)
- Industrial temperature grade vs commercial -33 variant (vs PIC17C43-16/L (commercial))
- Same PLCC-44 footprint across PIC17C family (vs PIC18F4220)
Notes de conception
Estimated: The PIC17C43-16I/L supply voltage range is 4.5 V to 6 V, with typical operation at 5.0 V. Decouple VDD with a 100 nF ceramic capacitor placed within 5 mm of each VDD pin and a bulk 10 uF electrolytic at the board entry point. The 44-pin PLCC has two VDD pins (17 and 41) and two VSS pins (18 and 42); both pairs must be connected. Inrush current during OTP programming can reach 30 mA, so the regulator should provide at least 100 mA headroom.
The PIC17C43 family uses OTP memory, which cannot be erased. Production firmware must be fully validated before programming; use a PIC17C43/JW windowed ceramic package for development and erase cycles, then program the production PIC17C43-16I/L in the final build. The 4.5-6 V supply must be stable; brown-out during OTP programming will corrupt the part permanently. The MCLR reset pin requires a 10 kohm pull-up to VDD; leaving MCLR floating causes erratic behavior.
Place the 16 MHz crystal or resonator within 10 mm of OSC1 (pin 19) and OSC2 (pin 20). Use short, symmetric traces and add 27 pF load capacitors to ground for a fundamental-mode crystal. Route the MCLR trace away from PWM outputs and switching signals to prevent false resets. The 44-pin PLCC J-lead package accepts standard PLCC sockets (e.g., 3M Textool) for socketed prototyping and field service; verify socket height against enclosure constraints.
Informations de conformité
Compliance data not present in the verified web data; PIC17C43 is a legacy NRND part and full compliance documentation may require direct manufacturer contact. AEC-Q100 is not applicable - this is a general-purpose industrial MCU, not automotive-qualified.
