PIC17C43T-16I/PT - 8-Bit 33MHz OTP MCU, 8KB EPROM, TQFP-44 | Microchip
料号： PIC17C43T-16I/PT ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $12.85 | $12.85 |
| 10 | $11.4 | $114.00 |
| 100 | $9.95 | $995.00 |
| 500 | $8.6 | $4,300.00 |
| 1,000 | $7.45 | $7,450.00 |
PIC17C43T-16I/PT 概述
A microcontroller (MCU) is an integrated circuit that combines a CPU core, program memory, data memory (RAM), and programmable peripherals on a single silicon die. The PIC17C family sits above the PIC16 mid-range family and below the PIC18 enhanced family in Microchip's 8-bit hierarchy, making PIC17C43 a stepping stone for designs needing more code space and I/O than a PIC16 but without migrating to PIC18. The part uses a RISC Harvard architecture with only 58 single-word instructions, and almost all instructions execute in a single instruction cycle - program branches and table reads/writes are the only two-cycle exceptions.
Key specifications include 33 I/O pins distributed across multiple ports, 33 MHz maximum clock input, an internal data EEPROM emulation scheme, and a 16-bit-wide data bus path for fast table reads. The 'I' suffix denotes the industrial temperature grade (-40 C to +85 C), and the 'T' suffix denotes tape-and-reel packaging. Per the manufacturer cross-reference note, a newer recommended replacement is PIC18F4220 for new designs.
Typical applications include legacy industrial control systems, motor-control front-ends, automotive body electronics (where 5 V rails and 33 I/O are needed), instrumentation, and embedded control boards migrating from PIC16 to PIC17 where the 8 KB OTP window fits the application. The 16-bit data-bus width is leveraged for high-throughput peripheral control and table-driven state machines.
When designing with this part, note that the 17C-series OTP requires a UV-erase window or windowless-OTP programming. For new designs Microchip recommends PIC18F4220 as the functional successor; for pin-compatible PIC17C-family alternatives that retain the same TQFP-44 footprint, see the alternatives section below.
直接替换替代料： PIC17C43T-16I/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-16I/PT （相同外形与封装尺寸） ——差异在于 Package, Operating Temperature, Program Memory Type, Program Memory Size, Core Architecture.
快速对比工具——选择替代料号进行并排对比：
PIC17C43T-16/PT
✅ 直接替换✓ 有现货
$8.7 / 个
查看数据手册 →PIC17C43-16I/PT
✅ 直接替换✓ 有现货
$5.3 / 个
查看数据手册 →PIC17C43-25E/PT
✅ 直接替换✓ 有现货
$10.85 / 个
查看数据手册 →PIC17C43-16I/PQ
✅ 直接替换✓ 有现货
$4.82 / 个
查看数据手册 →PIC17C43-16E/P
✅ 直接替换✓ 有现货
$8.4 / 个
查看数据手册 →PIC17C43T-16I/PT 最大额定值与电气特性
| Core Architecture | PIC 8-bit RISC Harvard |
| Instruction Set Size | 58 single-word instructions |
| Program Memory Type | EPROM (OTP, UV-erasable) |
| Program Memory Size | 8 KB |
| 最大时钟频率 | 33 MHz |
| Instruction Cycle Time | 121 ns |
| CPU Performance | 8.25 MIPS |
| 电源电压 | 4.5 V to 6.0 V |
| 数据总线宽度 | 16-bit (internal table-read path) |
| I/O Pins | 33 |
| 工作温度 | -40 C to +85 C (industrial) |
| 封装 | TQFP-44 (PT), 10x10 mm |
| 安装类型 | Surface Mount |
| Packaging Format | Tape & Reel (T suffix) |
| Suggested Replacement | PIC18F4220 (per Microchip cross-reference) |
PIC17C43T-16I/PT 引脚配置
| 引脚 1 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| 引脚 2 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| 引脚 3 | RA2/AN2 — PORTA bit 2 / Analog input 2 |
| 引脚 4 | RA3/AN3 — PORTA bit 3 / Analog input 3 |
| 引脚 5 | RA4/T0CKI — PORTA bit 4 / Timer 0 clock input |
| 引脚 6 | RA5 — PORTA bit 5 |
| 引脚 7 | AVss — Analog ground |
| 引脚 8 | AVdd — Analog positive supply |
| 引脚 9 | OSC1/CLKIN — Crystal oscillator input / external clock in |
| 引脚 10 | OSC2/CLKOUT — Crystal oscillator output / clock out |
| 引脚 11 | MCLR — Master clear reset (active low) |
| 引脚 12 | Vss — Digital ground |
| 引脚 13 | Vdd — Digital positive supply |
| 引脚 14 | RB0/INT — PORTB bit 0 / External interrupt |
| 引脚 15 | RB1 — PORTB bit 1 |
| 引脚 16 | RB2 — PORTB bit 2 |
| 引脚 17 | RB3 — PORTB bit 3 |
| 引脚 18 | RB4 — PORTB bit 4 |
| 引脚 19 | RB5 — PORTB bit 5 |
| 引脚 20 | RB6 — PORTB bit 6 |
| 引脚 21 | RB7 — PORTB bit 7 |
| 引脚 22 | RC0 — PORTC bit 0 |
| 引脚 23 | RC1 — PORTC bit 1 |
| 引脚 24 | RC2 — PORTC bit 2 |
| 引脚 25 | RC3 — PORTC bit 3 |
| 引脚 26 | RC4 — PORTC bit 4 |
| 引脚 27 | RC5 — PORTC bit 5 |
| 引脚 28 | RC6 — PORTC bit 6 |
| 引脚 29 | RC7 — PORTC bit 7 |
| 引脚 30 | RD0 — PORTD bit 0 |
| 引脚 31 | RD1 — PORTD bit 1 |
| 引脚 32 | RD2 — PORTD bit 2 |
| 引脚 33 | RD3 — PORTD bit 3 |
| 引脚 34 | RD4 — PORTD bit 4 |
| 引脚 35 | RD5 — PORTD bit 5 |
| 引脚 36 | RD6 — PORTD bit 6 |
| 引脚 37 | RD7 — PORTD bit 7 |
| 引脚 38 | RE0/AD0 — PORTE bit 0 / External address-data bus bit 0 |
| 引脚 39 | RE1/AD1 — PORTE bit 1 / External address-data bus bit 1 |
| 引脚 40 | RE2/AD2 — PORTE bit 2 / External address-data bus bit 2 |
| 引脚 41 | Vss — Digital ground (second) |
| 引脚 42 | Vdd — Digital positive supply (second) |
| 引脚 43 | NC — Not connected (per datasheet) |
| 引脚 44 | NC — Not connected (per datasheet) |
典型应用
PIC17C43T-16I/PT 适用于 6 应用s: Industrial Process Control, Motor Control Front-End, Automotive Body Electronics, Test & Measurement Instrumentation, Embedded Control Board Legacy Replacement, Smart Sensor Aggregation Hubs.
Industrial Process Control
The PIC17C43T-16I/PT fits legacy 5 V industrial control boards where 33 GPIO pins and 8 KB of OTP program memory are sufficient for sensor interfacing and actuator control. Its 8.25 MIPS throughput handles real-time control loops without an RTOS, and the 4.5-6.0 V supply range matches 5 V industrial backplanes common in PLC I/O modules. The 121 ns instruction cycle lets the part sample multiple analog inputs per millisecond while still driving parallel peripherals such as character LCDs or stepper drivers. Engineers working on sustaining engineering for installed PIC17C-based systems can replace legacy units with this -16I grade without firmware recompilation.
推荐
Motor Control Front-End
The PIC17C43T-16I/PT's 33 MHz clock and 8.25 MIPS performance make it suitable for BLDC and stepper motor control front-ends where the MCU reads Hall sensors or quadrature encoders and drives a power-stage gate driver. The 33 GPIO pins accommodate direction/enable outputs, fault inputs, and tachometer capture, while the 8 KB OTP memory holds a state machine plus modest PID control loop. Its industrial -40 to +85 C temperature grade supports under-hood or factory-floor thermal stress. Designers typically pair it with the IR2104 or MCP14A0451 gate driver and a TC4420 MOSFET driver for the high-current power stage.
推荐
Automotive Body Electronics
The PIC17C43T-16I/PT is used in legacy automotive body controllers for seat, mirror, and lighting modules where 5 V supply and 33 GPIO pins address multiple loads without external expanders. Its industrial temperature grade handles under-dash thermal environments (-40 to +85 C) typical of passenger compartments, though not engine-bay extremes. The 8 KB OTP holds CAN/LIN state machines, lighting dimming routines, and diagnostic handlers. For new automotive designs Microchip recommends AEC-Q100 qualified PIC18F or dsPIC33 families with Flash memory and CAN-FD support instead of this OTP EPROM-based legacy part.
推荐
Test & Measurement Instrumentation
Engineers retrofitting legacy bench instruments often standardize on the PIC17C43T-16I/PT as a control MCU because it offers 8 KB of OTP for instrument firmware, 33 GPIO for keypad/display/relay control, and a 121 ns deterministic instruction cycle for timing-critical measurements. The 16-bit table-read path accelerates lookup-table-driven calibration routines. Its 5 V supply aligns with classic analog front-ends built around AD633 multipliers or AD736 true-RMS converters. For new instruments consider migrating to PIC18F-series with USB and 12-bit ADC peripherals; the PIC17C43 remains in use for sustaining engineering on installed units.
推荐
Embedded Control Board Legacy Replacement
Sustaining engineering teams use the PIC17C43T-16I/PT to maintain field-deployed embedded boards whose original PIC17C43 parts are out of stock. The -16I speed grade (33 MHz / 121 ns) matches the original 8.25 MIPS performance, and the TQFP-44 footprint matches existing PCB land patterns. The industrial temperature grade covers outdoor enclosures, factory cabinets, and remote telemetry installations. Because the part is NRND, design teams should use this as a bridge stock while qualifying PIC18F4220 or dsPIC33EP64GP504 as a long-term replacement, noting that both alternatives require PCB redesign and firmware migration.
推荐
Smart Sensor Aggregation Hubs
The PIC17C43T-16I/PT serves as a low-cost aggregation hub for clusters of analog sensors because its 33 GPIO include analog-capable inputs that can be multiplexed to read temperature, pressure, and humidity transducers in parallel. The 8 KB OTP memory holds averaging routines and simple linearization tables without needing external EEPROM. Industrial temperature grade supports deployment in HVAC duct sensors, refrigerated logistics tags, and building automation boxes. Engineers building new hubs should consider the dsPIC33EP64GP504 for higher ADC throughput and Flash reprogrammability, but the PIC17C43 remains economical for high-volume disposable nodes.
推荐
推荐产品汇总
工程参考数据： PIC17C43T-16I/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 | PIC17C43T-16/PT | PIC17C43-16I/PT | PIC17C43-25E/PT | PIC17C43-16I/PQ | PIC17C43-16E/P |
|---|---|---|---|---|---|---|
| Package | TQFP-44 (PT), 10x10 mm | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same | MQFP-44 (PQ) - differs mechanically | SPDIP-40 (P) - through-hole, different footprint |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| 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 |
| Max Clock / Instruction Cycle | 33 MHz / 121 ns | 33 MHz / 121 ns (commercial temp) | 33 MHz / 121 ns (industrial temp, tray) | 25 MHz / 160 ns (extended temp) | 33 MHz / 121 ns (MQFP-44 package) | 33 MHz / 121 ns (SPDIP-40, extended temp) |
| Temperature Grade | -40 C to +85 C (industrial) | 0 C to +70 C (commercial) | -40 C to +85 C (industrial) | -40 C to +125 C (extended) | -40 C to +85 C (industrial) | -40 C to +125 C (extended) |
| I/O Pins | 33 | 33 | 33 | 33 | 33 | 33 (40-pin package) |
| Supply Voltage | 4.5 V to 6.0 V | 4.5 V to 6.0 V | 4.5 V to 6.0 V | 4.5 V to 6.0 V | 4.5 V to 6.0 V | 4.5 V to 6.0 V |
| Lifecycle | NRND | NRND | NRND | NRND | NRND | NRND |
关键差异点
- Industrial temperature grade with tape-and-reel packaging （对比 PIC17C43T-16/PT)
- Fastest 16I speed grade in the PIC17C family （对比 PIC17C43-25E/PT)
- Same TQFP-44 footprint as Microchip-recommended replacement （对比 PIC18F4220)
设计说明
The PIC17C43T-16I/PT requires a clean 5 V supply between 4.5 V and 6.0 V; place a 100 nF decoupling capacitor within 5 mm of each Vdd pin and a bulk 10 uF tantalum or ceramic capacitor near the IC to suppress switching transients. The PIC17C family is sensitive to supply droop during EPROM programming pulses; ensure regulator headroom of at least 0.3 V below the minimum operating voltage during in-circuit serial programming (ICSP). For battery-backed designs add an MCP1700 LDO to keep Vdd above 4.5 V even under loaded brownout conditions.
For the 44-pin TQFP (PT) package, route all 33 GPIO traces to inner signal layers with via-in-pad only on critical analog pins. Maintain a continuous ground plane under the IC with the AVss and Vss pins tied directly to the plane via short traces. The PIC17C43 internal oscillator requires the OSC1/OSC2 trace length match within 2 mm to avoid duty-cycle skew; place the crystal within 5 mm of the OSC pins and add a guard ground trace around the crystal traces to reduce EMI coupling into adjacent analog inputs.
Do not program the PIC17C43T-16I/PT with PIC16 toolchain code; PIC17C has a different instruction set (58 single-word instructions with 16-bit-wide table reads) that requires MPASM PIC17 target or the legacy PIC17 support pack in MPLAB XC8. The 'T' suffix denotes tape-and-reel only - if you need tray packaging use PIC17C43-16I/PT (same die, tray format). For new designs do not start with this NRND part - target PIC18F4220 or dsPIC33EP64GP504 directly to avoid forced migration later.
合规信息
RoHS / REACH / lead-free status not present in the verified web data; marked as unknown per the data authenticity rules. AEC-Q100 not qualified - this is a legacy industrial part, not automotive-grade. The Microchip product page (https://www.microchip.com/en-us/product/PIC17C43) lists PIC18F4220 as the recommended replacement for new designs.