PIC17C44T-16/PQ - 16MHz 8-bit OTP MCU, 44-MQFP | Microchip
MPN: PIC17C44T-16/PQ ✗ Cuối đờiPIC17C44T-16/PQ Tóm tắt
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, RAM, and peripheral I/O on one die. The PIC® 17C family is one of Microchip's high-performance 8-bit lines, with the PIC17C44 positioned as a member of that OTP-programmable subfamily. Within the broader taxonomy, PIC17C44 sits in the hierarchy: PIC17C44 -> PIC® 17C family -> 8-bit microcontroller -> microcontroller -> embedded controller -> semiconductor device. The 'T' suffix indicates tape-and-reel packaging, and '16' denotes the 16 MHz maximum clock speed. The architecture delivers 8.25 MIPS (121 ns instruction execution) across 58 single-word instructions per the manufacturer.
Key features of the PIC17C44T-16/PQ include an 8-level deep hardware stack, multiple interrupt sources, a versatile 8-bit timer/counter, and a USART peripheral for asynchronous serial communication. The 33 I/O pins are arranged across multiple ports with individually configurable direction registers, and the device supports both polled and interrupt-driven I/O architectures. The OTP program memory enables fast prototyping while preserving one-time field programmability for production units.
Typical applications for the PIC17C44T-16/PQ include industrial control systems, automotive body and chassis electronics, embedded sensor hubs, motor control front-ends, and legacy equipment that requires a pin-compatible upgrade path. Designers also use the PIC17C44 in user-interface controllers, keypad scanners, and small-form-factor appliances where 8-bit performance and modest memory suffice. The 44-pin MQFP footprint is shared across multiple PIC17C4x variants, enabling design reuse across a product family.
When migrating from this part, note that Microchip has explicitly recommended the PIC18F442 as a newer alternative - users requiring a wider tool ecosystem (MPLAB X, XC8 compiler) and Flash memory should consider the PIC18 migration. Existing PIC17C44 designs are typically preserved by sourcing drop-in-compatible PIC17C44 variants with the same MQFP-44 footprint.
This page synthesizes distributor stock levels, drop-in PIC17C4x family replacements, MQFP-44 pinout detail, and design notes not found in the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho PIC17C44T-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 PIC17C44T-16/PQ (cùng hình factor và footprint) — khác nhau ở Package, Maximum Clock Frequency, Program Memory Size, Program Memory Type, Core Architecture.
PIC17C44-16/PQ
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17C44-16I/PQ
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17C44-25I/PQ
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17C44-16I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17C42A-33I/PQ
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17C44T-16/PQ Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC 8-bit RISC |
| Family | PIC® 17C |
| CPU Core Speed | 16 MHz |
| Performance | 8.25 MIPS (121 ns instruction execution) |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 16 KB (8K x 16) |
| RAM Size | 454 bytes (454 x 8) |
| Bề rộng đường dữ liệu | 8-bit |
| Number of I/O Pins | 33 programmable I/O |
| Supply Voltage (Vdd) | 4.5 V to 6.0 V |
| Hộp | 44-MQFP (10x10 mm) |
| Kiểu lắp đặt | Surface Mount |
| Packaging | Tape & Reel (T suffix) |
| Instruction Set | 58 single-word instructions |
| Hardware Stack | 8-level deep |
| Communication Peripherals | USART (asynchronous serial) |
| Timers | 8-bit Timer/Counter (multiple) |
Cấu hình chân PIC17C44T-16/PQ
| Chân 1 | RA0/AN0 — PORTA bit 0 / analog input |
| Chân 2 | RA1/AN1 — PORTA bit 1 / analog input |
| Chân 3 | RA2/AN2 — PORTA bit 2 / analog input |
| Chân 4 | RA3/AN3 — PORTA bit 3 / analog input |
| Chân 5 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Chân 6 | RA5/SS — PORTA bit 5 / SPI slave select |
| Chân 7 | VSS — Ground reference |
| Chân 8 | OSC1/CLKIN — Crystal oscillator input / external clock |
| Chân 9 | OSC2/CLKOUT — Crystal oscillator output / clock out |
| Chân 10 | RC0/T1OSO — PORTC bit 0 / Timer1 oscillator output |
| Chân 11 | RC1/T1OSI — PORTC bit 1 / Timer1 oscillator input |
| Chân 12 | RC2/CCP1 — PORTC bit 2 / Capture-Compare-PWM1 |
| Chân 13 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Chân 14 | RD0/PSP0 — PORTD bit 0 / parallel slave port |
| Chân 15 | RD1/PSP1 — PORTD bit 1 / parallel slave port |
| Chân 16 | RD2/PSP2 — PORTD bit 2 / parallel slave port |
| Chân 17 | RD3/PSP3 — PORTD bit 3 / parallel slave port |
| Chân 18 | RD4/PSP4 — PORTD bit 4 / parallel slave port |
| Chân 19 | RD5/PSP5 — PORTD bit 5 / parallel slave port |
| Chân 20 | RD6/PSP6 — PORTD bit 6 / parallel slave port |
| Chân 21 | RD7/PSP7 — PORTD bit 7 / parallel slave port |
| Chân 22 | VSS — Ground reference |
| Chân 23 | VDD — Positive supply (4.5 V to 6.0 V) |
| Chân 24 | RB0/INT — PORTB bit 0 / external interrupt |
| Chân 25 | RB1 — PORTB bit 1 |
| Chân 26 | RB2 — PORTB bit 2 |
| Chân 27 | RB3 — PORTB bit 3 |
| Chân 28 | RB4 — PORTB bit 4 |
| Chân 29 | RB5 — PORTB bit 5 |
| Chân 30 | RB6 — PORTB bit 6 |
| Chân 31 | RB7 — PORTB bit 7 |
| Chân 32 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Chân 33 | RC5/SDO — PORTC bit 5 / SPI data out |
| Chân 34 | RC6/TX/CK — PORTC bit 6 / USART TX / clock |
| Chân 35 | RC7/RX/DT — PORTC bit 7 / USART RX / data |
| Chân 36 | RE0/RD — PORTE bit 0 / parallel port read strobe |
| Chân 37 | RE1/WR — PORTE bit 1 / parallel port write strobe |
| Chân 38 | RE2/CS — PORTE bit 2 / parallel port chip select |
| Chân 39 | VDD — Positive supply (4.5 V to 6.0 V) |
| Chân 40 | VSS — Ground reference |
| Chân 41 | NC — Not connected (per datasheet) |
| Chân 42 | NC — Not connected (per datasheet) |
| Chân 43 | NC — Not connected (per datasheet) |
| Chân 44 | MCLR/VPP — Master clear reset / programming voltage |
Ứng dụng tiêu biểu
PIC17C44T-16/PQ phù hợp cho 6 Áp dụngs: Industrial Control and Sensor Aggregation, Automotive Body and Chassis Electronics, User Interface and Keypad Controllers, Motor Control Front-End (Brushed DC and Stepper), Legacy Equipment Sustainment and Aftermarket, Small Appliance and Consumer Embedded Control.
Industrial Control and Sensor Aggregation
The PIC17C44T-16/PQ suits industrial control panels where its 33 I/O pins aggregate multiple 4-20 mA loops, switch inputs, and relay outputs through parallel I/O expansion. Its 16 MHz core delivers 8.25 MIPS, which is sufficient for PID loops scanning 8-16 channels at 100 Hz with deterministic latency. The 454-byte RAM holds the runtime stack, scan tables, and last-value buffers for HMI updates. Designers use the USART to bridge the aggregated data to a host PLC or industrial Ethernet gateway. The 4.5-6 V supply aligns with 5 V industrial backplanes, simplifying power-tree design.
Được đề xuất
Automotive Body and Chassis Electronics
Within automotive body controllers, the PIC17C44T-16/PQ drives seat-position memories, mirror-fold actuators, and lighting multiplexers where 33 I/O pins and a 16 MHz core are sufficient. The OTP program memory suits fixed-function body modules that never need firmware updates. Its 4.5-6 V supply range tolerates automotive cranking transients when paired with proper supply decoupling. The USART bridges to body-control LIN or K-Line networks. Designers should verify AEC-Q100 qualification status with the latest Microchip documentation before vehicle deployment, as legacy PIC17 OTP parts predate modern automotive qualification programs.
Được đề xuất
User Interface and Keypad Controllers
In user-interface controllers, the PIC17C44T-16/PQ scans 8x8 matrix keypads, drives 7-segment or character LCDs, and reads rotary encoders using its 33 I/O pins and on-chip timers. The 16 MHz core debounces keys, generates scan waveforms, and updates displays at 100 Hz without CPU bottlenecks. The 454-byte RAM supports menu stacks and edit buffers for setting-adjustment modes. The USART enables logging of user actions to a host processor. Designers benefit from the 44-MQFP footprint which provides ample I/O for segmented displays while keeping the board area compact.
Được đề xuất
Motor Control Front-End (Brushed DC and Stepper)
For low-power brushed-DC and stepper motor pre-drivers, the PIC17C44T-16/PQ generates PWM commutation waveforms, reads Hall sensors or quadrature encoders, and implements current-limit profiles via its timers and I/O. The 16 MHz core updates the PWM duty cycle at 20 kHz with margin for trapezoidal commutation on bipolar steppers. The 33 I/O pins drive H-bridge enable inputs and fault lines for multi-axis systems. The USART streams telemetry to a supervisory controller. The 5 V supply simplifies integration with discrete MOSFET gate drivers.
Được đề xuất
Legacy Equipment Sustainment and Aftermarket
For sustainment of legacy industrial equipment, the PIC17C44T-16/PQ is a drop-in replacement for installed units where redesign is not feasible. The 44-MQFP footprint and identical 16 KB OTP/454-byte RAM allow technicians to swap a failed unit without firmware porting. The part's wide second-source availability within the PIC17C44 family (industrial-temp, faster speed grades) provides flexibility when lead times vary. Its continued listing on distributor catalogs makes it a pragmatic choice for spares-pool management, capital-equipment maintenance contracts, and obsolescence-management programs.
Được đề xuất
Small Appliance and Consumer Embedded Control
In small appliances such as washing-machine user-interface boards, coffee machine controllers, and HVAC zone thermostats, the PIC17C44T-16/PQ runs state machines for mode selection, timer logic, and sensor reading. Its 33 I/O drive LED indicators, button inputs, triac-fired loads, and serial displays. The 4.5-6 V supply accepts rectified mains-derived rails without additional regulation. The OTP memory reduces per-unit cost in high-volume SKUs. Designers use the USART to expose diagnostics during factory calibration.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC17C44T-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 | PIC17C44-16/PQ | PIC17C44-16I/PQ | PIC17C44-25I/PQ | PIC17C44-16I/PT | PIC17C42A-33I/PQ |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-MQFP (10x10) | 44-MQFP (10x10) - same | 44-MQFP (10x10) - same | 44-MQFP (10x10) - same | 44-TQFP - family compatible | 44-MQFP (10x10) - same |
| Core Speed | 16 MHz | 16 MHz | 16 MHz | 25 MHz (+56%) | 16 MHz | 33 MHz (+106%) |
| Program Memory | 16 KB OTP | 16 KB OTP | 16 KB OTP | 16 KB OTP | 16 KB OTP | 4 KB OTP (-75%) |
| I/O Pins | 33 | 33 | 33 | 33 | 33 | 33 |
| Temperature Grade | Commercial | Commercial | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) |
| Packaging | Tape & Reel | Tray | Tray | Tray | Tray | Tray |
| 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 5.5 V |
Bảo phân biệt quan trọng
- Tape-and-reel packaging for high-volume SMT assembly (vsPIC17C44-16/PQ)
- Industrial temperature grade option for harsh environments (vsPIC17C44-16/PQ)
- Higher 25 MHz clock speed for compute-intensive loops (vsPIC17C44-25I/PQ)
Ghi chú thiết kế
Place a 100 nF ceramic decoupling capacitor as close as possible to each VDD/VSS pin pair of the PIC17C44T-16/PQ. Add a single bulk capacitor of 10 uF or larger on the supply rail near the MCU. The 4.5 V to 6.0 V supply range tolerates standard 5 V regulated rails; do not connect directly to unregulated 12 V battery systems without pre-regulation.
Route the 16 MHz crystal traces (OSC1, OSC2) short and symmetric, with the load capacitors placed within a few millimeters of the MCU pins. Keep the crystal loop area small to minimize radiated EMI. For PCB designs migrating from 44-MQFP to 44-TQFP, verify land-pattern compatibility because pad dimensions and pitch differ between the two packages.
The PIC17C44T-16/PQ uses One-Time Programmable (OTP) memory - firmware cannot be updated in the field. Lock the code-protection bits only after final firmware verification, since OTP cannot be reprogrammed. When migrating legacy designs, confirm the new PIC18F442 replacement requires a different toolchain (MPLAB X + XC8) versus legacy PIC17 tools.
The 44-MQFP package dissipates modest power at the 16 MHz core speed; for typical digital I/O loads, no external heatsink is required. Ensure the PCB copper pour under the exposed pad area (if present) is adequately stitched with thermal vias to the ground plane. Industrial-temperature (-40C to +85C) variants should be specified for harsh environments.
Thông tin tuân thủ
Compliance status for the legacy PIC17C44 family pre-dates current RoHS/REACH documentation standards; RoHS and lead-free status should be confirmed with the specific lot/date code on the shipping label before deployment in RoHS-restricted markets. Not AEC-Q100 qualified for automotive safety applications.
