PIC17C44-16I/PT - 8-Bit 16MHz 16KB OTP MCU, 44-TQFP | Microchip
MPN: PIC17C44-16I/PT ✗ Cuối đờiPIC17C44-16I/PT Tóm tắt
An 8-bit microcontroller (MCU) is a single-chip processor with an 8-bit data path, integrated program memory, RAM, and peripherals designed for deterministic control tasks. Within the broader semiconductor hierarchy, an MCU sits under microcontroller -> embedded processor -> semiconductor device, and the PIC17C44 family sits at the upper end of Microchip's 8-bit portfolio, between the PIC16 mid-range and PIC18 enhanced families. The PIC17C44 is the OTP-programmable variant of the family; the original windowed (UV-erasable) die is also sold as PIC17C44/JW for development.
Key specifications include a 16 MHz maximum oscillator input with 121 ns minimum instruction cycle, supply voltage range of 4.5 V to 6.0 V, and industrial-grade -40 °C to +85 °C operating temperature range. The part exposes 33 I/O pins, a hardware USART, multiple timers, and a programmable EPROM program memory, providing a complete control platform without external memory expansion. The 'I' suffix denotes the industrial temperature grade and 'PT' denotes the plastic TQFP-44 package.
The architecture uses a 16-bit-wide program memory bus and Harvard structure to fetch instructions and data in parallel. Most instructions execute in a single 121 ns cycle (8.25 MIPS sustained), with only program branches and table reads/writes requiring two cycles. This RISC-style pipeline, combined with a small 58-instruction opcode set, gives the PIC17C44 deterministic interrupt response time well-suited to real-time control loops.
Typical applications for the PIC17C44-16I/PT include industrial motor and process control, HVAC and appliance controllers, automotive body electronics (non-safety), and embedded instrumentation front-ends. The wide supply range and 33 I/O pins make it a direct fit for keypad scanning, LED/LCD driving, sensor interfacing, and PWM-actuated actuator control.
When designing in this device, confirm the OTP-only memory model fits your production flow: windowed (JW) samples are required for prototype code iteration, and a final masked-ROM (PIC17CR44) spin is available for high-volume runs. Microchip's MPLAB IDE and PICSTART-Plus / PRO MATE II programmers support the family natively.
This page consolidates distributor stock and pricing, drop-in PIC17C44 family variants, and practical engineering notes not repeated verbatim in the Microchip datasheet, giving procurement and design engineers a single point of decision.
Bộ thay thế dễ dàng lắp đặt cho PIC17C44-16I/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 PIC17C44-16I/PT (cùng hình factor và footprint) — khác nhau ở Package, Core Architecture, Program Memory Type, Operating Temperature Range, Maximum Clock Frequency.
PIC17C44-16/PT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC17C44T-16I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17C44-25/PT
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC17C44-33I/PT
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC17CR44-16I/PT
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC17C44-16I/PT Tỷ lệ tối đa & tính chất điện
| Product Family | PIC 17C |
| Core Architecture | 8-bit RISC Harvard |
| Instruction Set Width | 16-bit opcodes |
| Program Memory Type | OTP EPROM (one-time programmable) |
| Program Memory Size | 16 KB (8K x 16) |
| RAM Size | 454 bytes |
| Bề rộng đường dữ liệu | 16-bit (external) |
| Tần số xung maksimum | 16 MHz (33 MHz clock input variant available) |
| Instruction Cycle Time | 121 ns (single-cycle for most instructions) |
| MIPS (Peak) | 8.25 MIPS at 16 MHz |
| I/O Pins | 33 |
| Supply Voltage (Vdd) | 4.5 V to 6.0 V |
| Nhiệt độ hoạt động | -40 °C to +85 °C (industrial, 'I' suffix) |
| Hộp | 44-pin TQFP (PT), 10 x 10 mm |
| Kiểu lắp đặt | Surface Mount |
| Peripherals | USART, Timers, PWM, Watchdog Timer |
| Trạng thái RoHS | Compliant |
| Lead-Free | Yes |
Cấu hình chân PIC17C44-16I/PT
| Chân 1 | OSC1/CLKIN — Oscillator input / external clock input |
| Chân 2 | OSC2/CLKOUT — Oscillator output / clock output |
| Chân 3 | MCLR — Master Clear (Reset) input, active low |
| Chân 4 | RA0 — PORTA bit 0 (digital I/O) |
| Chân 5 | RA1 — PORTA bit 1 (digital I/O) |
| Chân 6 | RA2 — PORTA bit 2 (digital I/O) |
| Chân 7 | RA3 — PORTA bit 3 (digital I/O) |
| Chân 8 | RA4 — PORTA bit 4 (digital I/O, open-drain) |
| Chân 9 | RA5 — PORTA bit 5 (digital I/O) |
| Chân 10 | VSS — Ground reference |
| Chân 11 | VDD — Positive supply (4.5V to 6.0V) |
| Chân 12 | RB0/INT — PORTB bit 0 / External interrupt |
| Chân 13 | RB1 — PORTB bit 1 (digital I/O) |
| Chân 14 | RB2 — PORTB bit 2 (digital I/O) |
| Chân 15 | RB3 — PORTB bit 3 (digital I/O) |
| Chân 16 | RB4 — PORTB bit 4 (digital I/O) |
| Chân 17 | RB5 — PORTB bit 5 (digital I/O) |
| Chân 18 | RB6 — PORTB bit 6 (digital I/O) |
| Chân 19 | RB7 — PORTB bit 7 (digital I/O) |
| Chân 20 | VSS — Ground |
| Chân 21 | VDD — Positive supply |
| Chân 22 | RC0 — PORTC bit 0 (digital I/O / external bus) |
| Chân 23 | RC1 — PORTC bit 1 |
| Chân 24 | RC2 — PORTC bit 2 |
| Chân 25 | RC3 — PORTC bit 3 |
| Chân 26 | RC4 — PORTC bit 4 |
| Chân 27 | RC5 — PORTC bit 5 |
| Chân 28 | RC6 — PORTC bit 6 |
| Chân 29 | RC7 — PORTC bit 7 |
| Chân 30 | RD0 — PORTD bit 0 (external data bus low byte) |
| Chân 31 | RD1 — PORTD bit 1 |
| Chân 32 | RD2 — PORTD bit 2 |
| Chân 33 | RD3 — PORTD bit 3 |
| Chân 34 | RD4 — PORTD bit 4 |
| Chân 35 | RD5 — PORTD bit 5 |
| Chân 36 | RD6 — PORTD bit 6 |
| Chân 37 | RD7 — PORTD bit 7 |
| Chân 38 | RE0 — PORTE bit 0 (external data bus high byte) |
| Chân 39 | RE1 — PORTE bit 1 |
| Chân 40 | RE2 — PORTE bit 2 |
| Chân 41 | VSS — Ground |
| Chân 42 | VDD — Positive supply |
| Chân 43 | T0CKI — Timer0 clock input |
| Chân 44 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
PIC17C44-16I/PT phù hợp cho 6 Áp dụngs: Industrial Motor and Process Control, HVAC and Appliance Controllers, Automotive Body Electronics (Non-Safety), Embedded Instrumentation Front-Ends, Keypad, LED, and LCD User Interfaces, Legacy Field-Replacement and Repair Boards.
Industrial Motor and Process Control
The PIC17C44-16I/PT's 33 I/O pins and PWM peripherals make it well-suited for industrial motor drive and process control. With 8.25 MIPS throughput (16 MHz, 121 ns instruction cycle), it closes current and torque control loops fast enough for brushed-DC and stepper systems. The -40 °C to +85 °C industrial temperature grade supports factory-floor environments. Designers wire the 33 I/O to encoder inputs, Hall sensors, and H-bridge FET drivers without external glue logic.
Được đề xuất
HVAC and Appliance Controllers
The PIC17C44-16I/PT is a classic fit for HVAC control boards, washing machines, and dishwasher control panels where deterministic real-time behavior matters. Its 16 KB OTP program memory holds a fixed control algorithm, while 454 bytes of RAM manages thermostat inputs, valve drivers, and timer interrupts. The 4.5 V to 6.0 V supply range aligns with regulated 5 V appliance rails; industrial temperature grade handles garage and basement installations.
Được đề xuất
Automotive Body Electronics (Non-Safety)
Pre-CAN era automotive body modules used PIC17C44-class MCUs for seat controllers, mirror adjusters, and lighting controls. The PIC17C44-16I/PT's 33 I/O handle multiple switch inputs and lamp outputs; its industrial temperature grade tolerates under-dash thermal loads. Note that this part is NOT AEC-Q100 qualified - for safety-critical automotive, use AEC-Q100 graded PIC18F variants. This application is appropriate for hobby and legacy field-replacement only.
Được đề xuất
Embedded Instrumentation Front-Ends
The PIC17C44-16I/PT serves well as an embedded instrumentation front-end for digital panel meters, weighing scales, and data loggers. Its 16-bit external data bus interfaces to external ADCs and DACs without wait-state glue logic, and 8.25 MIPS throughput supports 7-segment multiplexed display refresh and keypad scanning concurrently. The 454-byte RAM buffers measurement packets before serial transmission via the on-chip USART.
Được đề xuất
Keypad, LED, and LCD User Interfaces
With 33 I/O pins and a 121 ns instruction cycle, the PIC17C44-16I/PT can scan a 4x4 matrix keypad while simultaneously driving multiplexed 7-segment LED or character LCD displays. Its 16 KB OTP holds the lookup-table-driven menu logic, and the on-chip USART relays commands to a host controller. Designers often pair it with a character LCD like the HD44780 for human-machine-interface panels.
Được đề xuất
Legacy Field-Replacement and Repair Boards
For OEM service depots and industrial maintenance contracts, the PIC17C44-16I/PT remains the only drop-in part for legacy control boards that have been in service since the 1990s. Although NRND, Microchip continues limited production for industrial customers. Drop-in 44-TQFP variants in the same family (PIC17C44T-16I/PT, PIC17C44-25/PT) provide alternative stock channels when the original part is out of supply.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC17C44-16I/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 | PIC17C44-16/PT | PIC17C44T-16I/PT | PIC17C44-25/PT | PIC17C44-33I/PT | PIC17CR44-16I/PT |
|---|---|---|---|---|---|---|
| Package | 44-TQFP (PT) | 44-TQFP (PT) - same | 44-TQFP (PT) - same | 44-TQFP (PT) - same | 44-TQFP (PT) - same | 44-TQFP (PT) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 16 KB OTP | 16 KB OTP | 16 KB OTP | 16 KB OTP | 16 KB OTP | 16 KB Masked ROM |
| Maximum Clock | 16 MHz | 16 MHz | 16 MHz | 25 MHz | 33 MHz | 16 MHz |
| Operating Temperature | -40C to +85C (industrial) | 0C to +70C (commercial) | -40C to +85C (industrial) | 0C to +70C (commercial) | -40C to +85C (industrial) | -40C to +85C (industrial) |
| Memory Type | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM | Masked ROM (factory programmed) |
| Packaging | Tray | Tray | Tape & Reel | Tray | Tray | Tray |
| Lifecycle Status | NRND | NRND | NRND | NRND | NRND | NRND |
Bảo phân biệt quan trọng
- Higher clock rate variant in same package (vsPIC17C44-33I/PT)
- Reel-ready variant for SMT production (vsPIC17C44T-16I/PT)
- Masked-ROM variant for cost reduction (vsPIC17CR44-16I/PT)
Ghi chú thiết kế
Decouple the PIC17C44-16I/PT with a 100 nF ceramic capacitor placed within 5 mm of each VDD pin (pins 11, 21, 42), plus a bulk 10 uF tantalum or electrolytic on the 5 V rail. The three VDD pins (11, 21, 42) all require decoupling - omitting any one will cause brownout during oscillator transients. Hold MCLR high through a 10 kohm pull-up and 100 nF to ground for clean reset release.
Because the PIC17C44-16I/PT uses OTP EPROM (not flash or windowed UV EPROM in the PT package), the firmware must be fully verified on a PIC17C44/JW windowed sample or PIC18F442 flash prototype before committing to OTP programming. A single OTP programming error bricks the part; there is no field upgrade path. Verify clock oscillator stability before programming - marginal crystals pass programming but fail at temperature extremes.
Route the 16-bit external data bus (PORTC low byte, PORTD high byte) with matched lengths to within 25 mm, and keep trace capacitance under 50 pF by minimizing stubs. Place a ground guard ring around the external bus area to limit noise injection into the PORTA/PORTB analog-sensitive lines. The OSC1/OSC2 pins must be guarded by a ground trace and the crystal placed within 10 mm of the IC.
Thông tin tuân thủ
RoHS compliant per Microchip product page; lead-free package finish (Pb-free matte tin). Not AEC-Q100 qualified - for automotive applications use PIC18F or dsPIC33 variants with AEC-Q100 Grade 1 or 0 certification.