PIC17LC44T-08I/PQ - 8-Bit 8MHz MCU 16KB OTP 44-MQFP | Microchip
MPN: PIC17LC44T-08I/PQ ✓ Hoạt độngPIC17LC44T-08I/PQ Tóm tắt
Background: A microcontroller (MCU) is a single-chip computer integrating a CPU core, program memory (ROM/OTP/Flash), data memory (RAM), and peripherals such as timers, ADC, and I/O on one die. The PIC17C family sits between PIC16 mid-range and PIC18 enhanced parts, providing a RISC Harvard architecture, separate program and data buses, and a higher pin count for I/O-rich designs. OTP variants such as the PIC17LC44 are intended for volume production where firmware is finalized and field re-programmability is unnecessary, offering lower per-unit cost than windowed or flash parts.
Key features include the Harvard bus, eight-level hardware stack, 33 I/O ports organized to support parallel peripherals, an 8-bit data bus with 16-bit instruction word, and operating speed DC-33 MHz (8 MHz for the -08 speed grade). On-chip peripherals typically include multiple timers, a USART, and capture/compare/PWM modules per the PIC17C44 datasheet. The 16KB OTP holds 8K single-word instructions; 454 bytes of general-purpose RAM buffer register data and stack operations.
Typical applications include industrial control panels, motor-drive interface boards, instrumentation front-ends, automotive body electronics, and embedded legacy upgrades where PIC17 firmware is already deployed. The wide 2.5V-5V supply range enables both 3.3V and 5V system rails, and the 33 I/O allow direct parallel bus expansion to LCD, keypads, or memory-mapped peripherals. The MQFP-44 footprint also simplifies surface-mount assembly on legacy boards designed for the PIC17 family.
Designers should observe the 8 MHz oscillator limit, keep I/O sourcing within the 20-25 mA per-pin specification, and add a 0.1 uF decoupling cap adjacent to each VDD/VSS pair. Because this is an OTP device, firmware must be fully validated before programming; prototype with a windowed (JW) or emulation part before committing to production. This page synthesizes distributor pricing, drop-in alternatives from the same PIC17C family, and practical design notes not found in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho PIC17LC44T-08I/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 PIC17LC44T-08I/PQ (cùng hình factor và footprint) — khác nhau ở Package, Program Memory Size, Program Memory Type, RoHS Status, Maximum Clock Frequency.
PIC17LC44T-08/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17LC44-08I/L
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17C44T-25I/PQ
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17C44-16I/PQ
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17C43T-25I/PQ
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17LC44T-08I/PQ Tỷ lệ tối đa & tính chất điện
| Family | PIC17C |
| Core | 8-bit RISC PIC |
| Bề rộng đường dữ liệu | 8 bit |
| Instruction Word | 16 bit |
| Program Memory Size | 16 KB (8K x 16) |
| Program Memory Type | OTP (One-Time Programmable) |
| RAM | 454 bytes |
| Data EEPROM | 0 bytes (none) |
| Maximum Clock Speed | 8 MHz |
| Điện áp cung cấp hoạt động | 2.5 V to 5 V |
| I/O Pins | 33 |
| Instruction Count | 58 single-word instructions |
| Instruction Cycle | 121 ns (single-cycle) |
| Hộp | MQFP-44 (10x10 mm) |
| Kiểu lắp đặt | Surface Mount |
| Packaging | Tape & Reel (T/R) |
| Nhiệt độ hoạt động | -40C to +85C (Industrial) |
| Lifecycle Stage | Active |
Cấu hình chân PIC17LC44T-08I/PQ
| Chân 1 | MCLR — Master Clear (reset) input, active low |
| Chân 2 | OSC1 — Oscillator input / external clock |
| Chân 3 | OSC2 — Oscillator output |
| 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) |
| Chân 9 | RA5 — PORTA bit 5 (digital I/O) |
| Chân 10 | RA6 — PORTA bit 6 (digital I/O) |
| Chân 11 | RA7 — PORTA bit 7 (digital I/O) |
| Chân 12 | VSS — Ground reference |
| Chân 13 | RB0 — PORTB bit 0 (digital I/O) |
| Chân 14 | RB1 — PORTB bit 1 (digital I/O) |
| Chân 15 | RB2 — PORTB bit 2 (digital I/O) |
| Chân 16 | RB3 — PORTB bit 3 (digital I/O) |
| Chân 17 | RB4 — PORTB bit 4 (digital I/O) |
| Chân 18 | RB5 — PORTB bit 5 (digital I/O) |
| Chân 19 | RB6 — PORTB bit 6 (digital I/O) |
| Chân 20 | RB7 — PORTB bit 7 (digital I/O) |
| Chân 21 | RC0 — PORTC bit 0 (digital I/O) |
| Chân 22 | RC1 — PORTC bit 1 (digital I/O) |
| Chân 23 | RC2 — PORTC bit 2 (digital I/O) |
| Chân 24 | RC3 — PORTC bit 3 (digital I/O) |
| Chân 25 | RC4 — PORTC bit 4 (digital I/O) |
| Chân 26 | RC5 — PORTC bit 5 (digital I/O) |
| Chân 27 | RC6 — PORTC bit 6 (digital I/O) |
| Chân 28 | RC7 — PORTC bit 7 (digital I/O) |
| Chân 29 | RD0 — PORTD bit 0 (digital I/O) |
| Chân 30 | RD1 — PORTD bit 1 (digital I/O) |
| Chân 31 | RD2 — PORTD bit 2 (digital I/O) |
| Chân 32 | RD3 — PORTD bit 3 (digital I/O) |
| Chân 33 | RD4 — PORTD bit 4 (digital I/O) |
| Chân 34 | RD5 — PORTD bit 5 (digital I/O) |
| Chân 35 | RD6 — PORTD bit 6 (digital I/O) |
| Chân 36 | RD7 — PORTD bit 7 (digital I/O) |
| Chân 37 | VDD — Positive supply (2.5V-5V) |
| Chân 38 | VSS — Ground reference |
| Chân 39 | TOCKI — Timer0 external clock input |
| Chân 40 | INT — External interrupt input |
| Chân 41 | RX — USART receive |
| Chân 42 | TX — USART transmit |
| Chân 43 | VDD — Positive supply (2.5V-5V) |
| Chân 44 | VSS — Ground reference |
Ứng dụng tiêu biểu
PIC17LC44T-08I/PQ phù hợp cho 6 Áp dụngs: Industrial Control Panel Logic, Sensor Interface Front-End, Automotive Body Electronics, Embedded Legacy System Upgrades, Human-Machine Interface (HMI) Controller, Motor-Drive Interface Board.
Industrial Control Panel Logic
The PIC17LC44T-08I/PQ fits industrial control panels because its 33 GPIO pins can directly drive keypads, 7-segment displays, relay coils, and opto-isolated inputs without external multiplexers. The 2.5V-5V supply accepts both legacy 5V rails and modern 3.3V logic, and 16KB OTP holds full state-machine firmware for sequence control. With 454 bytes of RAM, the MCU tracks timers, debounces inputs, and manages comms state, while the 8 MHz clock gives 121 ns instruction cycle for deterministic scan loops. The MQFP-44 footprint is also rugged enough for industrial PCBs that must survive vibration and thermal cycling.
Được đề xuất
Sensor Interface Front-End
The PIC17LC44T-08I/PQ is well-suited as a sensor front-end MCU for multi-channel analog and digital sensors. Its 33 GPIO handle multiple SPI, I2C, or UART sensor buses in parallel, while 454 bytes of RAM buffer sensor data before forwarding to a host. The 2.5V-5V supply matches 3.3V sensor rails directly, and 8 MHz throughput (121 ns instruction cycle) is sufficient for polled sampling rates up to a few kHz per channel. The 16KB OTP holds calibration tables and protocol stacks, and the MQFP-44 footprint lets the MCU sit adjacent to sensor arrays on compact PCBs.
Được đề xuất
Automotive Body Electronics
The PIC17LC44T-08I/PQ targets body-electronics modules such as lighting controllers, HVAC blend-door actuators, and instrument-cluster I/O expanders. Its 33 GPIO drive LEDs, switches, and LIN/CAN-friendly UART peripherals, and the industrial -40C to +85C temperature range covers cabin and underhood-near applications. The wide 2.5V-5V input tolerates automotive load-dump transients when paired with a TVS clamp, while the MQFP-44 package supports wave-solder and reflow assembly on FR4. For AEC-Q100 qualified programs, Microchip recommends dsPIC33 or PIC18 variants - the LC44 is suitable for non-safety body modules.
Được đề xuất
Embedded Legacy System Upgrades
The PIC17LC44T-08I/PQ is the natural choice for embedded legacy upgrades where existing PCBs already route to a PIC17C44 44-MQFP footprint. Designers can swap from EPROM windowed or flash predecessors to this LC OTP variant without layout changes, since the pinout and peripheral map remain identical across the PIC17C44 family. The 16KB OTP holds existing firmware images, the 8 MHz speed grade preserves deterministic timing budgets, and 33 GPIO maintain backwards compatibility with established sensor and actuator wiring. This makes the LC44 a low-risk production refit for instruments still shipping into long-lifecycle markets.
Được đề xuất
Human-Machine Interface (HMI) Controller
The PIC17LC44T-08I/PQ acts as an HMI controller for membrane keypads, character LCDs, and rotary encoder inputs. Its 33 GPIO easily scan 4x4 key matrices and 4-bit or 8-bit parallel LCD interfaces, while 454 bytes of RAM debounce keys, hold character FIFOs, and buffer encoder counts. At 8 MHz the MCU refreshes a 16x2 LCD at 100 Hz without flicker, and the 16KB OTP holds full custom-font and menu-tree state machines. The 2.5V-5V supply allows direct 5V LCD drive without level shifters.
Được đề xuất
Motor-Drive Interface Board
The PIC17LC44T-08I/PQ serves as a glue controller on motor-drive interface boards, generating PWM direction logic, fault monitoring, and serial telemetry to a host DSP or FPGA. Its 33 GPIO drive opto-isolated gate-driver signals, encoder inputs, and current-sense amplifier enables, while 16KB OTP holds commutation tables for trapezoidal or simple FOC routines. The 8 MHz clock supports deterministic control loops up to several kHz, and the 2.5V-5V supply aligns with 3.3V gate-driver rails. The MQFP-44 package tolerates the higher thermal environments near power stages.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC17LC44T-08I/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 | PIC17LC44T-08/PT | PIC17LC44-08I/L | PIC17C44T-25I/PQ | PIC17C44-16I/PQ | PIC17C43T-25I/PQ |
|---|---|---|---|---|---|---|
| Package | MQFP-44 (10x10 mm) | TQFP-44 tray | LCC-44 windowed | MQFP-44 (same) | MQFP-44 (same) | MQFP-44 (same) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Max Clock Speed | 8 MHz | 8 MHz | 8 MHz | 25 MHz | 16 MHz | 25 MHz |
| Program Memory | 16 KB OTP | 16 KB OTP | 16 KB EPROM (windowed) | 16 KB EPROM | 16 KB EPROM | 8 KB OTP |
| Operating Voltage | 2.5 V to 5 V | 2.5 V to 5 V | 2.5 V to 5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
| I/O Pins | 33 | 33 | 33 | 33 | 33 | 33 |
| RAM | 454 bytes | 454 bytes | 454 bytes | 454 bytes | 454 bytes | 454 bytes |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Bảo phân biệt quan trọng
- Surface-mount MQFP Tape & Reel factory packaging (vsPIC17C44-16I/PQ)
- Industrial 2.5V-5V wide supply range (vsPIC17C44T-25I/PQ)
- 16KB OTP for higher code density than LC43 family (vsPIC17C43T-25I/PQ)
Ghi chú thiết kế
Place a 0.1 uF decoupling capacitor within 5 mm of every VDD/VSS pin pair on the PIC17LC44T-08I/PQ MQFP-44. The PIC17C44 datasheet specifies four VDD pins (1, 23, 44 plus the analog supply if used) and corresponding VSS pins - bypassing each pair separately prevents supply droop during I/O switching transients that can corrupt the Harvard bus fetch. Add a bulk 10 uF tantalum or ceramic close to the device for transient load steps at 8 MHz clock.
The MQFP-44 10x10 mm body uses 0.8 mm lead pitch, which is reflow-solderable but requires a precise solder-paste stencil (0.15 mm thickness typical). Keep continuous ground planes under the package to control EMI, and route the high-speed OSC1/OSC2 traces short and symmetric to minimise clock jitter. For production lines, follow IPC-A-610 Class 2 acceptance criteria unless the end product requires Class 3.
The PIC17LC44T-08I/PQ is OTP (One-Time Programmable) and cannot be erased or re-programmed - validate firmware on a JW windowed or PIC17C44 EPROM part before committing to OTP production units. Ensure the MCLR pin is pulled high through a 10 kohm resistor with a 100 nF cap to VDD for clean reset behaviour, otherwise spurious resets may occur during power-up. Do not exceed the absolute maximum VDD of 6V or the device may latch up.
Thông tin tuân thủ
RoHS and lead-free status typical for Microchip PIC17 family MQFP-44 OTP parts. AEC-Q100 not qualified - choose dsPIC33 or PIC18 AEC-Q100 parts for automotive safety applications.
