PIC17C43-25E/PT - 8-bit 25MHz OTP MCU 8KB | Microchip | TQFP-44
MPN: PIC17C43-25E/PT ✗ Cuối đờiPIC17C43-25E/PT Tóm tắt
An 8-bit microcontroller is a single-chip computer built around an 8-bit data path, ALU, register file, on-chip memory, and integrated peripherals. In the broader taxonomy, it sits under microcontroller -> embedded MCU -> semiconductor IC. The PIC17C4x family is Microchip's mid-1990s high-performance branch, adding a hardware multiplier, multiple interrupt vectors, and a 16-bit-wide instruction word to the classic PIC RISC pipeline for higher throughput than the PIC16C series at the same clock.
Key specifications include a 25 MHz external oscillator, 8 KB OTP program memory, 454 x 8 RAM, 33 I/O lines, and a brown-out-reset / watchdog stack characteristic of the family. The PIC17C43 silicon predates flash; engineers prototype with the EPROM-windowed JW package and produce with the OTP /QTP variants, which is why the -25E/PT part number ends in E (Extended industrial temperature, -40C to +125C).
The architecture combines a Harvard bus, a 16-bit-wide instruction word, and a single-cycle hardware 8 x 8 -> 16-bit multiplier, enabling the 8.25 MIPS throughput at 25 MHz. Peripherals include timers, a USART, Capture/Compare/PWM modules, and an 8-bit ADC on most family members - verify each peripheral against the device data sheet.
Typical applications include industrial control panels, appliance controllers, automotive body modules (pre-CAN), instrumentation front-ends, and legacy embedded systems that were designed around the PIC17C4x ecosystem and remain in production. The extended temperature grade also supports outdoor and automotive under-hood environments.
When designing with this device, note that it is OTP - firmware must be correct on first programming, so emulator or windowed parts are recommended during development. Modern Microchip recommends the PIC18F4220 as the flash-based successor with pin-for-pin migration.
This page synthesizes distributor pricing, drop-in alternatives, and design notes not always present in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho PIC17C43-25E/PT — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC17C43-25E/PT (cùng hình factor và footprint) — khác nhau ở Package, Program Memory Type, Operating Temperature, Core Architecture, Supply Voltage.
PIC17C43-25/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17C43-33/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17C43-33I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17C43-16I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F4220-I/PT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC17C43-25E/PT Tỷ lệ tối đa & tính chất điện
| Architecture | 8-bit PIC17C RISC, Harvard bus |
| Instruction Set Width | 16-bit (single word, 58 instructions) |
| Program Memory Type | OTP (One-Time-Programmable) ROM |
| Program Memory Size | 8 KB (4K x 16 words) |
| RAM Size | 454 x 8 (454 bytes) |
| Tần số xung maksimum | 25 MHz |
| Performance | 8.25 MIPS (121 ns instruction cycle) |
| Number of I/O Pins | 33 |
| Oscillator Type | External |
| Hộp | 44-pin TQFP (PT) |
| Kiểu lắp đặt | Surface Mount |
| Nhiệt độ hoạt động | -40C to +125C (Extended, 'E' suffix) |
| Cấp MSL | 3 (168 hours) |
| Packaging | Tube |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC17C43-25E/PT
| Chân 1 | OSC1 — External oscillator input |
| Chân 2 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| Chân 3 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| Chân 4 | RA2/AN2 — PORTA bit 2 / analog input 2 |
| Chân 5 | RA3/AN3 — PORTA bit 3 / analog input 3 |
| Chân 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Chân 7 | RA5/AN4 — PORTA bit 5 / analog input 4 |
| Chân 8 | VSS — Ground |
| Chân 9 | OSC2 — External oscillator output / crystal |
| Chân 10 | RC0 — PORTC bit 0 |
| Chân 11 | RC1 — PORTC bit 1 |
| Chân 12 | RC2 — PORTC bit 2 |
| Chân 13 | RC3 — PORTC bit 3 |
| Chân 14 | RD0 — PORTD bit 0 |
| Chân 15 | RD1 — PORTD bit 1 |
| Chân 16 | RD2 — PORTD bit 2 |
| Chân 17 | RD3 — PORTD bit 3 |
| Chân 18 | RC4 — PORTC bit 4 |
| Chân 19 | RC5 — PORTC bit 5 |
| Chân 20 | RC6 — PORTC bit 6 / TX |
| Chân 21 | RC7 — PORTC bit 7 / RX |
| Chân 22 | RB0/INT — PORTB bit 0 / external interrupt |
| Chân 23 | RB1 — PORTB bit 1 |
| Chân 24 | RB2 — PORTB bit 2 |
| Chân 25 | RB3 — PORTB bit 3 |
| Chân 26 | RB4 — PORTB bit 4 |
| Chân 27 | RB5 — PORTB bit 5 |
| Chân 28 | RB6 — PORTB bit 6 |
| Chân 29 | RB7 — PORTB bit 7 |
| Chân 30 | VDD — Positive supply |
| Chân 31 | VSS — Ground |
| Chân 32 | RD4 — PORTD bit 4 |
| Chân 33 | RD5 — PORTD bit 5 |
| Chân 34 | RD6 — PORTD bit 6 |
| Chân 35 | RD7 — PORTD bit 7 |
| Chân 36 | RE0 — PORTE bit 0 |
| Chân 37 | RE1 — PORTE bit 1 |
| Chân 38 | RE2 — PORTE bit 2 |
| Chân 39 | MCLR — Master clear reset (active low) |
| Chân 40 | RA6 — PORTA bit 6 |
| Chân 41 | RA7 — PORTA bit 7 |
| Chân 42 | VSS — Ground |
| Chân 43 | VDD — Positive supply |
| Chân 44 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
PIC17C43-25E/PT phù hợp cho 7 Áp dụngs: Industrial Control Panels, Appliance Controllers, Automotive Body Modules, Test and Measurement Front-Ends, HVAC and Climate Control, Point-of-Sale Terminals, Legacy Embedded Field Replacements.
Industrial Control Panels
The PIC17C43-25E/PT fits industrial control panels because of its 8.25 MIPS throughput, 33 digital I/O lines for buttons and indicators, and Extended -40C to +125C temperature grade. At 25 MHz the part scans a 32-key matrix in well under 1 ms while leaving headroom for PID loops driving relays. The OTP memory means firmware must be locked at production, which is acceptable for high-volume panel runs.
Được đề xuất
Appliance Controllers
White-goods and small-appliance controllers benefit from the PIC17C43-25E/PT's small TQFP-44 footprint, low cost at high volume, and 58-instruction PIC17C4x RISC core that compiles efficiently to handle motor timing and sensor reading. The 8 KB OTP holds a full wash-cycle state machine plus UI driver, while 33 I/O pins cover triac drives, LEDs, and keypad rows without external expanders.
Được đề xuất
Automotive Body Modules
Body-electronics modules from the late 1990s and early 2000s commonly used the PIC17C43-25E/PT family for seat controllers, mirror drivers, and lighting nodes. The Extended -40C to +125C grade handles under-hood thermal stress, and the 25 MHz core runs LIN slave stacks and PWM dimming simultaneously. Designers porting these legacy modules to modern platforms should evaluate PIC18F4220 for new builds.
Được đề xuất
Test and Measurement Front-Ends
Bench instruments and panel meters leverage the PIC17C43-25E/PT's 8.25 MIPS to scan multiplexed ADCs and drive character LCDs in real time. The Harvard bus and 16-bit instructions keep interrupt latency deterministic for front-panel keypads, while 454 bytes of RAM comfortably buffer measurement strings. The 33 I/O lines support both parallel LCDs and SPI/I2C sensor chains without external logic.
Được đề xuất
HVAC and Climate Control
HVAC controllers use the PIC17C43-25E/PT to read thermistor and pressure sensors, drive triac-controlled fan stages, and manage a character LCD. Its Extended temperature grade survives plenum environments, and the 16-bit instruction word fits a real-time scheduler in fewer cycles than PIC16C alternatives. Legacy HVAC firmware can be preserved by retaining the OTP part rather than migrating to flash.
Được đề xuất
Point-of-Sale Terminals
Older point-of-sale terminals and EFT-PIN pads used PIC17C43-class parts for keyboard handling, display refresh, and cryptographic co-processor glue logic. The Extended temperature range and 33 I/O pins accommodate keypad matrix, character display, magnetic-stripe interface, and serial smart-card channel. OTP memory is a security advantage in payment terminals because firmware cannot be rewritten via external attacks.
Được đề xuất
Legacy Embedded Field Replacements
Industrial installations from the late 1990s still run PIC17C43-25E/PT firmware in pumps, controllers, and remote telemetry units where the OTP requirement was never a drawback. Field replacement boards must use the same TQFP-44 footprint, and the PIC17C43 family variants are listed on Microchip's longevity program for sustained supply. Engineers replacing failed boards should match the -E temperature suffix and verify the existing firmware binary ID before swap.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC17C43-25E/PT — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | PIC17C43-25/PT | PIC17C43-33/PT | PIC17C43-16I/PT | PIC18F4220-I/PT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-44 (PT) | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same |
| Program Memory | 8 KB OTP | 8 KB OTP | 8 KB OTP | 8 KB OTP | 16 KB Flash (reprogrammable) |
| Maximum Clock | 25 MHz | 25 MHz | 33 MHz | 16 MHz | 40 MHz |
| Throughput | 8.25 MIPS | 8.25 MIPS | 10.9 MIPS | 5.3 MIPS | 10 MIPS |
| Temperature Grade | Extended -40C to +125C | Commercial 0C to +70C | Commercial 0C to +70C | Industrial -40C to +85C | Industrial -40C to +85C |
| Memory Type | OTP ROM (one-time) | OTP ROM | OTP ROM | OTP ROM | Flash (reprogrammable) |
| Lifecycle Status | NRND | NRND | NRND | NRND | Active |
Bảo phân biệt quan trọng
- Extended -40C to +125C temperature grade vs commercial siblings (vsPIC17C43-25/PT)
- Mature PIC17C4x instruction set with 58 single-word instructions (vsPIC18F4220-I/PT)
- OTP memory for tamper-resistant firmware (vsPIC18F4220-I/PT)
Ghi chú thiết kế
The PIC17C43-25E/PT uses One-Time-Programmable memory - the bitcell cannot be erased after programming, so any firmware bug locked into the silicon is permanent. Always validate firmware on a windowed JW package or PIC17C4x emulator before committing to OTP production parts. Budget for OTP programming time and one-time tooling cost when targeting this part for a new design.
At the maximum 25 MHz clock and 5V supply, the PIC17C43-25E/PT draws roughly 50 mA, dissipating 250 mW. Estimated junction temperature rise with the standard TQFP-44 PCB footprint and no airflow is about 25C above ambient assuming a JEDEC-standard 4-layer test board - well within the 125C maximum. In enclosed industrial cabinets, derate clock frequency or add minimal airflow to maintain margin.
Place the external crystal or resonator within 10 mm of the OSC1/OSC2 pins and keep the trace pair short and symmetrical to avoid clock distortion. Decouple VDD with a 100 nF ceramic placed as close as possible to each VDD pin, and add a bulk 10 uF tantalum near the package. MCLR must have a 10 kohm pull-up to VDD and a 100 nF capacitor to ground for clean reset behavior.
TQFP-44 is a fine-pitch (0.8 mm) package - use JEDEC MS-026 land patterns and 4 mil trace-and-space rules. Stencil-aperture reduction to 80% on thermal pads and 90% on perimeter pads helps prevent solder bridging on production runs. Reflow profile should follow JEDEC J-STD-020 with peak temperature no greater than 250C for the matte-tin lead finish.
Thông tin tuân thủ
RoHS and lead-free per Microchip product page. Not AEC-Q100 qualified - parts marked 'E' indicate Extended temperature only, not automotive qualification. For AEC-Q100 requirements consider PIC18F variants explicitly qualified by Microchip.