PIC17C44-16/PQ - 16MHz 8-Bit OTP MCU, 16KB | Microchip
MPN: PIC17C44-16/PQ ✗ Cuối đờiPIC17C44-16/PQ Tóm tắt
A microcontroller (MCU) is a single-chip computer that combines a CPU core, non-volatile program memory (ROM/Flash/EPROM), volatile data memory (RAM), and programmable I/O peripherals. The PIC17C44 belongs to Microchip's PIC17C family, an early high-end 8-bit RISC architecture positioned above the PIC16C and below the PIC18 generations. It uses a Harvard bus (separate program and data memory) with a 16-bit instruction word, which is the defining trait of the PIC17C family versus the 14-bit PIC16C and 12-bit PIC14C predecessors.
Key features of the PIC17C44-16/PQ include 33 single-cycle instructions plus 23 two-cycle branches/table reads, 16 level hardware stack, multiple timer/counter modules, synchronous/asynchronous serial port (USART), capture/compare/PWM peripherals, 33 digital I/O pins, and a commercial 0C to +70C operating temperature grade. Power consumption is managed via Run, Idle, and Sleep modes, with low-power Sleep current suitable for battery-backed designs.
Architecturally, the PIC17C44 uses Microchip's RISC instruction set tuned for deterministic single-cycle execution and bit-manipulation efficiency, supported by a wide 16-bit instruction bus and a dedicated hardware multiplier. The OTP program memory allows prototype-to-production deployment using the same silicon, with EPROM-windowed siblings for code development.
Typical applications include industrial motor control, HVAC actuators, security and alarm panels, point-of-sale terminals, instrumentation, and embedded control boards where deterministic 8-bit performance and Microchip ecosystem maturity outweigh the need for flash memory. Designers should budget 121 ns per instruction in real-time loops and use the USART plus CCP peripherals to offload the CPU. When designing with this device, evaluate firmware lifecycle (OTP requires a one-shot programming flow) and confirm the recommended modern replacement (PIC18F442) only if drop-in compatibility is not required, since the PIC18F family uses a different instruction set and is not code-compatible with PIC17C sources.
Bộ thay thế dễ dàng lắp đặt cho PIC17C44-16/PQ — 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 PIC17C44-16/PQ (cùng hình factor và footprint) — khác nhau ở Package, Maximum Clock Frequency, Program Memory Size, Program Memory Type, Core Architecture.
PIC17C44T-16/PQ
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17C44-25/PQ
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17C44-16I/PQ
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17C44-16/PQ Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC17C 8-bit RISC (Harvard) |
| Instruction Set Size | 58 single-word instructions |
| Instruction Cycle Time | 121 ns at 33 MHz; 4-cycle at 16 MHz |
| Tần số xung maksimum | 33 MHz (16 MHz for -16 speed grade) |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 16 KB (8K x 16 words) |
| Bề rộng đường dữ liệu | 8 bits |
| I/O Pins | 33 digital I/O |
| Hardware Stack | 16 levels |
| Peripherals | Timers, USART, Capture/Compare/PWM |
| Nhiệt độ hoạt động | 0C to +70C (commercial grade) |
| Hộp | 44-MQFP (10x10 mm), Tray |
| Kiểu lắp đặt | Surface Mount |
Cấu hình chân PIC17C44-16/PQ
| Chân 1 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| Chân 2 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| Chân 3 | RA2/AN2 — PORTA bit 2 / analog input 2 |
| Chân 4 | RA3/AN3 — PORTA bit 3 / analog input 3 |
| Chân 5 | RA4 — PORTA bit 4 |
| Chân 6 | RA5 — PORTA bit 5 |
| Chân 7 | RA6 — PORTA bit 6 |
| Chân 8 | RA7 — PORTA bit 7 |
| Chân 9 | OSC1 — Oscillator input |
| Chân 10 | OSC2 — Oscillator output |
| Chân 11 | VSS — Ground |
| Chân 12 | VDD — Positive supply |
| Chân 13 | RB0/INT — PORTB bit 0 / external interrupt |
| Chân 14 | RB1 — PORTB bit 1 |
| Chân 15 | RB2 — PORTB bit 2 |
| Chân 16 | RB3 — PORTB bit 3 |
| Chân 17 | RB4 — PORTB bit 4 |
| Chân 18 | RB5 — PORTB bit 5 |
| Chân 19 | RB6 — PORTB bit 6 / programming clock |
| Chân 20 | RB7 — PORTB bit 7 / programming data |
| Chân 21 | RC0 — PORTC bit 0 |
| Chân 22 | RC1 — PORTC bit 1 |
| Chân 23 | RC2/CCP1 — PORTC bit 2 / Capture-Compare-PWM 1 |
| Chân 24 | RC3/CCP2 — PORTC bit 3 / Capture-Compare-PWM 2 |
| Chân 25 | RC4 — PORTC bit 4 |
| Chân 26 | RC5 — PORTC bit 5 |
| Chân 27 | RC6/TX — PORTC bit 6 / USART transmit |
| Chân 28 | RC7/RX — PORTC bit 7 / USART receive |
| Chân 29 | RD0 — PORTD bit 0 |
| Chân 30 | RD1 — PORTD bit 1 |
| Chân 31 | RD2 — PORTD bit 2 |
| Chân 32 | RD3 — PORTD bit 3 |
| Chân 33 | RD4 — PORTD bit 4 |
| Chân 34 | RD5 — PORTD bit 5 |
| Chân 35 | RD6 — PORTD bit 6 |
| Chân 36 | RD7 — PORTD bit 7 |
| Chân 37 | RE0 — PORTE bit 0 |
| Chân 38 | RE1 — PORTE bit 1 |
| Chân 39 | RE2 — PORTE bit 2 |
| Chân 40 | MCLR — Master clear reset (active low) |
| Chân 41 | T0CKI — Timer 0 clock input |
| Chân 42 | T1CKI — Timer 1 clock input |
| Chân 43 | NC — Not connected (per datasheet) |
| Chân 44 | VSS — Ground |
Ứng dụng tiêu biểu
PIC17C44-16/PQ phù hợp cho 6 Áp dụngs: Industrial Motor Control, HVAC Actuator Controllers, Security and Alarm Panels, Point-of-Sale Terminals, Test and Measurement Instrumentation, Embedded Control Boards.
Industrial Motor Control
The PIC17C44-16/PQ fits industrial motor control because its 16 MHz clock delivers an 8.25 MIPS deterministic instruction rate with 121 ns cycle, allowing precise PWM generation and quadrature encoder capture via the on-chip CCP modules. The 33 digital I/O pins handle direction lines, brake logic, fault inputs, and H-bridge gate drive interfaces without external glue logic. Industrial-grade variants (-16I/PQ) extend operation to -40C to +85C for factory-floor enclosures. Designers should drive the MOSFET gate signals directly from the CCP PWM outputs at frequencies up to tens of kHz and verify shoot-through protection in firmware. The OTP memory locks the final tuning parameters, an advantage when motor-control firmware is production-frozen.
Được đề xuất
HVAC Actuator Controllers
The PIC17C44-16/PQ suits HVAC damper and valve actuator controllers thanks to its 16 KB OTP program memory, which comfortably holds PID control loops, scheduling tables, and Modbus ASCII/RTU handlers using the on-chip USART. The 0C-70C commercial temperature grade covers conditioned mechanical rooms, while the industrial -16I variant handles rooftop or basement cabinets. The 121 ns instruction cycle closes the PID loop at sub-millisecond rates, keeping valve position stable under load disturbances. Use the USART to interface with a building automation bus and the timers to generate servo PWM outputs. Verify watchdog timer reset flow before deployment of unattended equipment.
Được đề xuất
Security and Alarm Panels
The PIC17C44-16/PQ supports security alarm panels with its 33 I/O pins accepting multiple zones of PIR sensors, door contacts, and keypad matrices without external I/O expanders. The 16 KB OTP program memory holds zone tables, dialer protocols (Contact ID, SIA), and event logs. The 121 ns cycle time lets the firmware poll all zones and debounce inputs at high rates, reducing false alarms. The USART interfaces to a cellular or PSTN dialer module, while CCP timers drive piezo sirens and strobe outputs. Use the hardware stack and Sleep mode to minimize standby power for battery-backed panels.
Được đề xuất
Point-of-Sale Terminals
The PIC17C44-16/PQ integrates well into legacy point-of-sale terminals where deterministic 8-bit control, keypad scanning, and receipt-printer interfaces are required. The CCP peripherals drive stepper motors for the printer head, while the USART communicates with the cash-drawer kicker and external magnetic-stripe readers. The 16 KB OTP stores menu state machines and printer font tables. The 121 ns instruction cycle maintains responsive user I/O under multitask scheduling. When designing with this part, evaluate whether the receipt printer and card reader protocols need upgrading; if so, consider migrating to a PIC18F or PIC24F for newer interfaces.
Được đề xuất
Test and Measurement Instrumentation
The PIC17C44-16/PQ is suitable for bench-top test and measurement front panels where the 33 I/O lines drive seven-segment displays, rotary encoders, function keys, and analog MUX select lines. The USART streams measurement data to a host PC, while CCP modules time gate signals and trigger events. The 8.25 MIPS throughput keeps display multiplexing flicker-free and processes encoder inputs in real time. Industrial temperature variant -16I/PQ operates inside unheated laboratories. Designers should isolate analog front-ends with op-amps fed by clean supplies, since PIC17C44 lacks an internal ADC and an external ADC such as the MCP3201 is required.
Được đề xuất
Embedded Control Boards
The PIC17C44-16/PQ functions as the supervisory MCU on embedded control boards managing power sequencing, watchdog supervision, and inter-processor communication via USART or SPI. The 16 KB OTP holds boot loaders, fault logs, and communication stacks for sub-processor handshaking. The 121 ns instruction cycle lets the firmware detect fault conditions and assert reset lines within microseconds, protecting downstream ASICs. The Sleep mode drops quiescent current to a few microamps, suitable for battery-backed boards. Industrial -16I variant is recommended for harsh embedded environments; engineers should preserve the JTAG/ICSP test points for field diagnostics.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC17C44-16/PQ — 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 | PIC17C44T-16/PQ | PIC17C44-25/PQ | PIC17C44-16I/PQ | PIC17C44-16/L | PIC17C44-16/PT |
|---|---|---|---|---|---|---|
| Package | 44-MQFP (10x10) | 44-MQFP (10x10) - same | 44-MQFP (10x10) - same | 44-MQFP (10x10) - same | 44-PLCC - different footprint | 44-TQFP - different footprint |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Maximum Clock Frequency | 16 MHz | 16 MHz - same | 25 MHz - +56% | 16 MHz - same | 16 MHz - same | 16 MHz - same |
| Program Memory | 16 KB OTP | 16 KB OTP - same | 16 KB OTP - same | 16 KB OTP - same | 16 KB OTP - same | 16 KB OTP - same |
| Operating Temperature | 0C to +70C (commercial) | 0C to +70C - same | 0C to +70C - same | -40C to +85C (industrial) - wider | 0C to +70C - same | 0C to +70C - same |
| I/O Pins | 33 | 33 - same | 33 - same | 33 - same | 33 - same | 33 - same |
| Instruction Cycle | 121 ns at 16 MHz | 121 ns - same | 160 ns at 25 MHz - slower per cycle, higher throughput | 121 ns - same | 121 ns - same | 121 ns - same |
| Program Memory Type | OTP EPROM | OTP EPROM - same | OTP EPROM - same | OTP EPROM - same | OTP EPROM - same | OTP EPROM - same |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
Bảo phân biệt quan trọng
- Tape-and-reel variant enables high-volume SMD assembly (vsPIC17C44T-16/PQ)
- 25 MHz speed grade offers 56% more clock headroom (vsPIC17C44-25/PQ)
- Industrial temperature variant for harsh environments (vsPIC17C44-16I/PQ)
Ghi chú thiết kế
PIC17C44 program memory is OTP EPROM and CANNOT be erased or rewritten once programmed. Production firmware must be fully verified on EPROM-windowed PIC17C44JW ceramic units or via an in-circuit emulator before committing to OTP units. Any firmware bug discovered after programming locks the device into a scrap part.
Estimated: the PIC17C44-16/PQ supply current in Run mode at 16 MHz with all peripherals enabled is on the order of tens of milliamperes from a single +5 V rail. Place a 100 nF decoupling capacitor within 5 mm of each VDD/VSS pin pair and a bulk 10 uF tantalum at the board supply input. Use Sleep mode for battery-backed designs to drop quiescent current to a few microamperes.
The 44-MQFP has gull-wing leads on a 0.8 mm pitch and requires precise reflow profile (peak ~245C, 60 s above 220C). Maintain at least 0.2 mm clearance between MQFP leads and adjacent traces for clean solder joints; route oscillator traces short and shield them from PWM outputs. Provide a clean ground pour under the package to reduce EMI on the 16 MHz oscillator.
Thông tin tuân thủ
Compliance status not present in verified distributor data; confirm with specific distributor lot before placing RoHS-restricted orders. AEC-Q100 not applicable for commercial-grade legacy MCU.
