PIC17C43T-16/PT - 8KB OTP 8-Bit MCU 33MHz 44-TQFP | Microchip
料号： PIC17C43T-16/PT ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $14.5 | $14.50 |
| 10 | $13.05 | $130.50 |
| 100 | $11.6 | $1,160.00 |
| 500 | $10.15 | $5,075.00 |
| 1,000 | $8.7 | $8,700.00 |
PIC17C43T-16/PT 概述
An 8-bit microcontroller (MCU) is a programmable logic device that combines an 8-bit CPU core, non-volatile program memory (ROM/EPROM/Flash), volatile data RAM, and a fixed set of peripherals on a single silicon die. Within the broader taxonomy it sits under microcontroller -> embedded controller -> microprocessor -> semiconductor IC. The 8-bit class typically serves cost-sensitive, deterministic, low-power applications where 32-bit performance is overkill, and it remains dominant in industrial, automotive, and white-goods control segments where instruction determinism and long product tail support outweigh raw throughput.
Key features of the PIC17C43T-16/PT include a 16-bit-wide instruction word (despite the 8-bit data path), a Harvard architecture with separate program and data buses, an internal 8 x 8 hardware multiplier (single-cycle), a 16-level deep hardware stack, and an 8-bit real-time timer/counter with an 8-bit prescaler. The supply range is 4.5 V to 6 V and the part supports in-circuit serial programming through the standard PIC ICSP interface. Brown-out reset, power-on reset, and a watchdog timer with an on-chip RC oscillator are integrated for safety-critical control.
Typical applications include motor control, SMPS primary-side control, industrial instrumentation, automotive body controllers (pre-CAN era), and white-goods user interfaces. The 33 I/O pins are sufficient to drive segment LCD multiplexers, keypad matrices, and triac-fired loads simultaneously. The OTP memory allows flexible in-system firmware revision during development, with masked-ROM (PIC17CR43) variants available for volume production.
When designing with this device, ensure the 5 V supply is well-regulated; the EPROM cell retention is sensitive to extended operation below 4.5 V. For new designs, prefer the PIC18F family or dsPIC33EP family for active development and tool-chain support, since PIC17C is a legacy mature line. Always confirm the latest Microchip product longevity statement before committing to long-life designs.
This page synthesizes verified distributor pricing, drop-in same-package alternatives drawn from the PIC17C family, comparison parameters, and practical design notes - information not assembled in the manufacturer datasheet itself.
直接替换替代料： PIC17C43T-16/PT ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： PIC17C43T-16/PT （相同外形与封装尺寸） ——差异在于 Package, Program Memory Type, Core Architecture, Program Memory Size, Operating Temperature.
快速对比工具——选择替代料号进行并排对比：
PIC17C43-16I/PT
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$5.3 / 个
查看数据手册 →PIC17C43-16E/P
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$8.4 / 个
查看数据手册 →PIC17C43-25E/PT
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$10.85 / 个
查看数据手册 →PIC17C42A-16/P
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$7.45 / 个
查看数据手册 →PIC17C42A-33/PT
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$9.65 / 个
查看数据手册 →PIC17C43T-16/PT 最大额定值与电气特性
| Core Architecture | 8-bit PIC RISC (Harvard) |
| Instruction Set | 58 single-word instructions |
| Program Memory | 8 KB OTP EPROM |
| Data RAM | 454 bytes |
| I/O Pins | 33 |
| 最大时钟频率 | 33 MHz |
| Instruction Cycle | 121 ns (single-cycle) |
| 电源电压 | 4.5 V to 6 V |
| Hardware Multiplier | 8 x 8 single-cycle |
| Hardware Stack Depth | 16 levels |
| Timers | 4 (TMR0-TMR3, 8-bit/16-bit mixed) |
| Capture/Compare/PWM | 2 CCP modules |
| UART | 1 (SCI with address detection) |
| Watchdog Timer | Yes (on-chip RC oscillator) |
| Brown-out Reset | Yes |
| Power-on Reset | Yes |
| In-Circuit Serial Programming | Yes (ICSP) |
| 工作温度 | -40 C to +85 C |
| 封装 | 44-pin TQFP (PT) 10x10 mm |
| 安装类型 | Surface Mount |
| MSL 等级 | 3 |
| RoHS 状态 | non_compliant (legacy OTP EPROM) |
PIC17C43T-16/PT 引脚配置
| 引脚 1 | RC0 — PORTC bit 0 (I/O) |
| 引脚 2 | RC1 — PORTC bit 1 (I/O) |
| 引脚 3 | RC2 — PORTC bit 2 (I/O) |
| 引脚 4 | RC3 — PORTC bit 3 (I/O) |
| 引脚 5 | RC4 — PORTC bit 4 (I/O) |
| 引脚 6 | RC5 — PORTC bit 5 (I/O) |
| 引脚 7 | RC6 — PORTC bit 6 (I/O) |
| 引脚 8 | RC7 — PORTC bit 7 (I/O) |
| 引脚 9 | RD0 — PORTD bit 0 (I/O) |
| 引脚 10 | RD1 — PORTD bit 1 (I/O) |
| 引脚 11 | RD2 — PORTD bit 2 (I/O) |
| 引脚 12 | RD3 — PORTD bit 3 (I/O) |
| 引脚 13 | RD4 — PORTD bit 4 (I/O) |
| 引脚 14 | RD5 — PORTD bit 5 (I/O) |
| 引脚 15 | RD6 — PORTD bit 6 (I/O) |
| 引脚 16 | RD7 — PORTD bit 7 (I/O) |
| 引脚 17 | VSS — Ground |
| 引脚 18 | OSC1 — Oscillator input |
| 引脚 19 | OSC2 — Oscillator output |
| 引脚 20 | VSS — Ground |
| 引脚 21 | VDD — Positive supply (4.5 V to 6 V) |
| 引脚 22 | RE0 — PORTE bit 0 (I/O, also AN5 analog) |
| 引脚 23 | RE1 — PORTE bit 1 (I/O, also AN6 analog) |
| 引脚 24 | RE2 — PORTE bit 2 (I/O, also AN7 analog) |
| 引脚 25 | RA0 — PORTA bit 0 (I/O, analog) |
| 引脚 26 | RA1 — PORTA bit 1 (I/O, analog) |
| 引脚 27 | RA2 — PORTA bit 2 (I/O, analog) |
| 引脚 28 | RA3 — PORTA bit 3 (I/O, analog) |
| 引脚 29 | RA4 — PORTA bit 4 (I/O, analog) |
| 引脚 30 | RA5 — PORTA bit 5 (I/O, analog) |
| 引脚 31 | RB0 — PORTB bit 0 (I/O, external interrupt) |
| 引脚 32 | RB1 — PORTB bit 1 (I/O) |
| 引脚 33 | RB2 — PORTB bit 2 (I/O) |
| 引脚 34 | RB3 — PORTB bit 3 (I/O) |
| 引脚 35 | RB4 — PORTB bit 4 (I/O) |
| 引脚 36 | RB5 — PORTB bit 5 (I/O) |
| 引脚 37 | RB6 — PORTB bit 6 (I/O, ICSP clock) |
| 引脚 38 | RB7 — PORTB bit 7 (I/O, ICSP data) |
| 引脚 39 | VDD — Positive supply (4.5 V to 6 V) |
| 引脚 40 | VSS — Ground |
| 引脚 41 | CCP1 — Capture/Compare/PWM 1 output (also on RC2) |
| 引脚 42 | CCP2 — Capture/Compare/PWM 2 output (also on RC1) |
| 引脚 43 | TX/RC6 — SCI UART transmit (shared with RC6) |
| 引脚 44 | RX/RC7 — SCI UART receive (shared with RC7) |
典型应用
PIC17C43T-16/PT 适用于 6 应用s: Industrial Motor Control, SMPS Primary-Side Control, Automotive Body Controller (Pre-CAN), White-Goods User Interface, Industrial Instrumentation, Legacy Embedded Control Board (Service Replacement).
Industrial Motor Control
The PIC17C43T-16/PT's 33 I/O pins and hardware 8 x 8 multiplier make it well suited to BLDC and stepper motor control. The 2 CCP modules generate PWM at the 121 ns instruction resolution, allowing precise commutation timing at speeds up to several kHz. Its 454-byte RAM supports closed-loop PI state without external memory, while the on-chip watchdog and brown-out reset keep the controller alive in electrically noisy industrial cabinets. The 4.5 V to 6 V supply range aligns directly with rectified 5 V rails common in motor-driver boards.
推荐
SMPS Primary-Side Control
The PIC17C43T-16/PT is well matched to switch-mode power supply primary-side control, where its 121 ns instruction cycle gives the control loop deterministic timing. The single-cycle 8 x 8 multiplier handles peak-current-mode compensation math in real time, while 2 CCP channels can drive the main MOSFET and synchronous rectifier timing. Brown-out reset at approximately 4 V protects the OTP memory from corrupted reads during supply droops, and the 33 I/O are sufficient for multi-output supply sequencing and housekeeping telemetry.
推荐
Automotive Body Controller (Pre-CAN)
The PIC17C43T-16/PT historically powered pre-CAN automotive body modules such as central locking, window lift, and mirror controllers. Its 33 I/O drive relay coils and switch-debounce inputs directly, and the 8 KB OTP holds state-machine firmware for body-comfort features. The hardware multiplier computes lamp-out detection (current-sense averaging) in real time, and the watchdog timer satisfies OEM functional-safety expectations. New designs should migrate to dsPIC33EP64GP504 with CAN-FD, but NRND stock remains viable for service replacements.
推荐
White-Goods User Interface
The PIC17C43T-16/PT is well suited to white-goods human-interface boards: washing machines, dishwashers, and oven control panels. Its 33 I/O multiplex segment LCDs up to 8 commons, scan a 4 x 5 keypad matrix, and drive triac-fired heater loads via opto-isolated zero-cross circuits. The 8 KB OTP holds lookup tables for menu state machines, sensor calibration, and buzzer-pattern firmware. Industrial temperature rating (-40 C to +85 C) handles appliance thermal environments, and the brown-out reset prevents lockup during brown-out events from the mains relay.
推荐
Industrial Instrumentation
The PIC17C43T-16/PT's 8 KB OTP and 454 B RAM fit mid-complexity measurement instruments such as panel meters, process calibrators, and data loggers. Its 16 MIPS throughput handles floating-point math libraries (in software) and linearisation routines for RTD, thermocouple, and strain-gauge sensors. The 2 CCP modules generate precise excitation pulses for sensor bridges, and the SCI/UART outputs data to PC or PLC hosts. Brown-out reset protects calibration tables in EPROM during supply disturbances on plant floors.
推荐
Legacy Embedded Control Board (Service Replacement)
Many 1990s and 2000s-era industrial controllers, scientific instruments, and avionics subsystems were built around the PIC17C43T-16/PT and remain in service. The part is essential as a long-tail service replacement for these systems, where PCBs are not easily redesigned and the firmware has been validated over decades. Distributors like Heisener and Microchip Direct maintain NRND stock specifically for this sustainment market. The 16 MHz 8 KB OTP combination is functionally indistinguishable from the original, allowing direct swap with no firmware or PCB change.
推荐
推荐产品汇总
工程参考数据： PIC17C43T-16/PT ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | PIC17C43-16I/PT | PIC17C43-16E/P | PIC17C43-25E/PT | PIC17C42A-16/P | PIC17C42A-33/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-pin TQFP (PT) | 44-pin TQFP (PT) - same | 44-pin TQFP (PT) - same | 44-pin TQFP (PT) - same | 44-pin TQFP (PT) - same | 44-pin TQFP (PT) - same |
| Program Memory | 8 KB OTP | 8 KB OTP - same | 8 KB OTP - same | 8 KB OTP - same | 4 KB OTP (-50%) | 4 KB OTP (-50%) |
| Data RAM | 454 bytes | 454 bytes - same | 454 bytes - same | 454 bytes - same | 232 bytes (-49%) | 232 bytes (-49%) |
| Max Clock Frequency | 33 MHz | 33 MHz - same | 33 MHz - same | 40 MHz (+21%) | 33 MHz - same | 33 MHz - same |
| Speed Grade (MIPS) | 16 MIPS | 16 MIPS - same | 16 MIPS - same | 25 MIPS (+56%) | 16 MIPS - same | 16 MIPS - same |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C - same | -40 C to +125 C (extended) | -40 C to +125 C (extended) | -40 C to +85 C - same | -40 C to +85 C - same |
| Supply Voltage | 4.5 V to 6 V | 4.5 V to 6 V - same | 4.5 V to 6 V - same | 4.5 V to 6 V - same | 4.5 V to 6 V - same | 4.5 V to 6 V - same |
| I/O Pins | 33 | 33 - same | 33 - same | 33 - same | 33 - same | 33 - same |
| Packaging Format | Tape & Reel | Tray | Tray | Tray | Tray | Tray |
关键差异点
- Highest-density program memory in PIC17C family （对比 PIC17C42A-16/P)
- Maximum compatibility with the original PIC17C43 silicon （对比 PIC17C43-25E/PT)
- Tape & Reel packaging for high-volume SMT assembly （对比 PIC17C43-16I/PT)
设计说明
The PIC17C43T-16/PT requires a regulated 4.5 V to 6 V supply with peak current capability of at least 50 mA for I/O switching plus core current. Place a 100 nF decoupling ceramic within 5 mm of each VDD/VSS pair (pins 21/17 and 39/40) and a bulk 10 uF tantalum or aluminum at the board supply input. Brown-out events below 4 V will trigger the internal BOR and reset the MCU; ensure the regulator has a transient response faster than 1 ms to ride through motor inrush events.
A common mistake is assuming the PIC17C43T-16/PT can be reprogrammed in-circuit. The OTP EPROM can only be programmed once via the ICSP interface - subsequent programming attempts will fail or damage cells. Use a UV-erasable PIC17C43JW windowed part during firmware development, then commit the validated hex image to the OTP version for production. Also avoid oscillator modes below 4 MHz, which violate the 121 ns instruction-cycle specification in the datasheet.
For the 44-pin TQFP (PT) package, use a 0.8 mm pitch land pattern with 0.3 mm pad width and 1.6 mm pad length, per IPC-7351 nominal density. Place the 33 MHz crystal within 10 mm of OSC1/OSC2 (pins 18-19) to keep the oscillator loop compact, with a guard trace around the crystal traces to isolate them from switching outputs. Add a series 100 ohm resistor on MCLR if the reset line is exposed to ESD events; an internal weak pull-up is provided but is not sufficient for industrial environments.
The PIC17C43T-16/PT lacks Schmitt triggers on all I/O (PORTA analog inputs have analog-mode hysteresis only), so slow-rising switch inputs (keypads, mechanical switches) may cause oscillation. Add an external 1 kHz RC low-pass filter or use the PORTB change-interrupt feature with software debounce. For CCP/PWM outputs driving FET gates through long traces, add a 33 ohm series resistor at the MCU pin to dampen ringing caused by gate-source capacitance.
合规信息
PIC17C43T-16/PT is a legacy 1990s-era OTP EPROM part with SnPb (tin-lead) finish, hence non-RoHS. Microchip does not offer a lead-free PIC17C43T variant. REACH SVHC status is compliant per Microchip material declarations. Not qualified to AEC-Q100; automotive designs should use PIC18F or dsPIC33EP families. Conflict-minerals declaration is compliant per Microchip policy.