PIC17C43-16I/L - 8-Bit 16MHz 8KB OTP MCU 44-PLCC | Microchip
MPN： PIC17C43-16I/L ✗ 停產PIC17C43-16I/L 概覽
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.
直接替換替代品，適用於 PIC17C43-16I/L — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： PIC17C43-16I/L （相同外形與佔位） — 差異在於 Program Memory Type, Program Memory Size, RAM Size, Maximum Clock Frequency, Operating Temperature.
PIC17C43-16/L
✅ 直接替換聯絡詢價
查看資料表 →PIC17C43/JW
✅ 直接替換聯絡詢價
查看資料表 →PIC17C43-16I/L 最大額定值與電氣特性
| Product Family | PIC 17C |
| Core | 8-bit PIC RISC |
| Instruction Set Width | 16-bit |
| 資料匯流排寬度 | 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 |
| 最大時脈頻率 | 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 |
| 工作溫度範圍 | -40C to +85C (Industrial) |
| 封裝 | 44-pin PLCC (J-Lead), 16.59 x 16.59 mm |
| 安裝類型 | Surface Mount |
PIC17C43-16I/L 腳位配置
| 腳位 1 | RA0 — Port A bit 0 / analog input |
| 腳位 2 | RA1 — Port A bit 1 / analog input |
| 腳位 3 | RA2 — Port A bit 2 / analog input |
| 腳位 4 | RA3 — Port A bit 3 / analog input |
| 腳位 5 | RA4 — Port A bit 4 |
| 腳位 6 | RA5 — Port A bit 5 |
| 腳位 7 | RA6 — Port A bit 6 |
| 腳位 8 | RA7 — Port A bit 7 |
| 腳位 9 | RB0 — Port B bit 0 / external interrupt |
| 腳位 10 | RB1 — Port B bit 1 |
| 腳位 11 | RB2 — Port B bit 2 |
| 腳位 12 | RB3 — Port B bit 3 |
| 腳位 13 | RB4 — Port B bit 4 |
| 腳位 14 | RB5 — Port B bit 5 |
| 腳位 15 | RB6 — Port B bit 6 / programming clock |
| 腳位 16 | RB7 — Port B bit 7 / programming data |
| 腳位 17 | VDD — Positive supply voltage (4.5V-6V) |
| 腳位 18 | VSS — Ground reference |
| 腳位 19 | OSC1 — Crystal oscillator input |
| 腳位 20 | OSC2 — Crystal oscillator output |
| 腳位 21 | RC0 — Port C bit 0 / USART TX |
| 腳位 22 | RC1 — Port C bit 1 / USART RX |
| 腳位 23 | RC2 — Port C bit 2 |
| 腳位 24 | RC3 — Port C bit 3 |
| 腳位 25 | RC4 — Port C bit 4 |
| 腳位 26 | RC5 — Port C bit 5 |
| 腳位 27 | RC6 — Port C bit 6 |
| 腳位 28 | RC7 — Port C bit 7 |
| 腳位 29 | RD0 — Port D bit 0 |
| 腳位 30 | RD1 — Port D bit 1 |
| 腳位 31 | RD2 — Port D bit 2 |
| 腳位 32 | RD3 — Port D bit 3 |
| 腳位 33 | RD4 — Port D bit 4 |
| 腳位 34 | RD5 — Port D bit 5 |
| 腳位 35 | RD6 — Port D bit 6 |
| 腳位 36 | RD7 — Port D bit 7 |
| 腳位 37 | RE0 — Port E bit 0 |
| 腳位 38 | RE1 — Port E bit 1 |
| 腳位 39 | RE2 — Port E bit 2 |
| 腳位 40 | MCLR — Master clear reset (active low) |
| 腳位 41 | VDD — Positive supply voltage (4.5V-6V) |
| 腳位 42 | VSS — Ground reference |
| 腳位 43 | RF0 — Port F bit 0 |
| 腳位 44 | RF1 — Port F bit 1 |
典型應用
PIC17C43-16I/L 適用於 6 應用s: 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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
推薦產品摘要
工程參考資料，適用於 PIC17C43-16I/L — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | 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 |
主要差異化特點
- Largest OTP memory in PIC17C family (對比PIC17C42A-16/L)
- Industrial temperature grade vs commercial -33 variant (對比PIC17C43-16/L (commercial))
- Same PLCC-44 footprint across PIC17C family (對比PIC18F4220)
設計說明
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.
合規資訊
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.
