PIC17LC44T-08I/L - 8MHz 8-bit OTP MCU, 16KB, 44-PLCC | Microchip
MPN: PIC17LC44T-08I/L ✗ Cuối đờiPIC17LC44T-08I/L Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and peripheral interfaces. The 8-bit PIC17C family uses a RISC Harvard architecture with separate program and data buses, enabling single-cycle instruction execution. As an embedded-class device, the PIC17LC44 sits within a hierarchy: 8-bit MCU -> PIC® 17C sub-family -> PIC17LC44 silicon -> PLCC-packaged industrial variant. This taxonomy helps engineers evaluate compatibility across the broader PIC microcontroller lineup.
Key features of the PIC17LC44 include a 33 I/O pin count, hardware multiply, 8-level hardware stack, multiple timer/counter modules, and a peripheral feature set typical of mid-1990s PIC17C designs. The OTP program memory allows one-time field programming via a device programmer, distinguishing this part from UV-erasable EPROM variants. The 8 MHz top speed, combined with the 121 ns instruction cycle, delivers roughly 8 MIPS of throughput, which is well-suited to control loops, sensor processing, and communication front-ends in cost-sensitive industrial designs.
Typical applications include industrial control systems, motor control front-ends, instrumentation, embedded communication bridges, and legacy equipment maintenance. The wide 2.5 V to 6.0 V supply tolerance makes the part tolerant of unregulated rails, while the 33 I/O count supports keypad scans, LCD multiplexed drive, and parallel sensor aggregation. Industrial-grade temperature rating enables factory-floor deployment.
Designers should consult the PIC17C4x datasheet for pinout specifics: 44-PLCC pin assignments differ from 40-pin DIP variants, and care is required when migrating layouts between PLCC and PQ packages. Programming requires a Microchip-compatible device programmer supporting the PIC17C OTP algorithm.
Bộ thay thế dễ dàng lắp đặt cho PIC17LC44T-08I/L — 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/L (cùng hình factor và footprint) — khác nhau ở Data Bus Width, Mounting Type, Program Memory Size, Operating Temperature Range, Package.
PIC17LC44-08I/L
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC17LC44T-08/L
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC17LC44-08/L
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC17LC43T-08/L
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17LC43-08I/L
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC17LC44T-08I/L Tỷ lệ tối đa & tính chất điện
| Family | PIC® 17C |
| Core | 8-bit RISC |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 16 KB (8K x 16) |
| RAM | 454 bytes |
| Tần số xung maksimum | 8 MHz |
| Instruction Cycle Time | 121 ns (single cycle), 242 ns (branch) |
| Bề rộng đường dữ liệu | 16 bit |
| I/O Pins | 33 |
| Supply Voltage Range | 2.5 V to 6.0 V |
| Nhiệt độ hoạt động | -40 °C to +85 °C (Industrial) |
| Hộp | 44-PLCC (16.59 x 16.59 mm, J-lead) |
| Kiểu lắp đặt | Surface Mount |
| Temperature Grade | Industrial |
| Terminal Form | J-BEND |
| Number of Terminals | 44 |
Cấu hình chân PIC17LC44T-08I/L
| Chân 1 | RA0 — I/O port A bit 0 |
| Chân 2 | RA1 — I/O port A bit 1 |
| Chân 3 | RA2 — I/O port A bit 2 |
| Chân 4 | RA3 — I/O port A bit 3 |
| Chân 5 | RA4 — I/O port A bit 4 |
| Chân 6 | RA5 — I/O port A bit 5 |
| Chân 7 | RA6 — I/O port A bit 6 |
| Chân 8 | RA7 — I/O port A bit 7 |
| Chân 9 | RB0/INT — I/O port B bit 0 / External interrupt |
| Chân 10 | RB1 — I/O port B bit 1 |
| Chân 11 | RB2 — I/O port B bit 2 |
| Chân 12 | RB3 — I/O port B bit 3 |
| Chân 13 | RB4 — I/O port B bit 4 |
| Chân 14 | RB5 — I/O port B bit 5 |
| Chân 15 | RB6 — I/O port B bit 6 |
| Chân 16 | RB7 — I/O port B bit 7 |
| Chân 17 | VSS — Ground reference |
| Chân 18 | VDD — Positive supply voltage (2.5 V to 6.0 V) |
| Chân 19 | OSC1/CLKIN — Crystal oscillator input / external clock input |
| Chân 20 | OSC2/CLKOUT — Crystal oscillator output / clock output |
| Chân 21 | RC0 — I/O port C bit 0 |
| Chân 22 | RC1 — I/O port C bit 1 |
| Chân 23 | RC2 — I/O port C bit 2 |
| Chân 24 | RC3 — I/O port C bit 3 |
| Chân 25 | RC4 — I/O port C bit 4 |
| Chân 26 | RC5 — I/O port C bit 5 |
| Chân 27 | RC6 — I/O port C bit 6 |
| Chân 28 | RC7 — I/O port C bit 7 |
| Chân 29 | RD0 — I/O port D bit 0 |
| Chân 30 | RD1 — I/O port D bit 1 |
| Chân 31 | RD2 — I/O port D bit 2 |
| Chân 32 | RD3 — I/O port D bit 3 |
| Chân 33 | RD4 — I/O port D bit 4 |
| Chân 34 | RD5 — I/O port D bit 5 |
| Chân 35 | RD6 — I/O port D bit 6 |
| Chân 36 | RD7 — I/O port D bit 7 |
| Chân 37 | RE0 — I/O port E bit 0 |
| Chân 38 | RE1 — I/O port E bit 1 |
| Chân 39 | RE2 — I/O port E bit 2 |
| Chân 40 | MCLR/VPP — Master clear reset / programming voltage |
| Chân 41 | NC — Not connected (per datasheet package pinout) |
| Chân 42 | NC — Not connected (per datasheet package pinout) |
| Chân 43 | NC — Not connected (per datasheet package pinout) |
| Chân 44 | NC — Not connected (per datasheet package pinout) |
Ứng dụng tiêu biểu
PIC17LC44T-08I/L phù hợp cho 6 Áp dụngs: Industrial Control Systems, Motor Control Front-End, Legacy Instrumentation, Embedded Communication Bridges, Sensor Aggregation Nodes, Embedded Display Controllers.
Industrial Control Systems
The PIC17LC44T-08I/L fits industrial control applications through its 33 I/O pins and 8 MHz operation, sufficient to scan keypads, drive multiplexed LED or character-LCD displays, and service digital sensor inputs in factory equipment. The 2.5 V to 6.0 V supply tolerance simplifies integration with 5 V regulated rails common in industrial backplanes. Its 16 KB OTP program memory accommodates state machines, lookup tables, and communication stacks for protocol conversion between legacy RS-232 or RS-485 ports and modern fieldbus interfaces. The industrial -40 °C to +85 °C temperature rating ensures operation in unheated enclosures.
Được đề xuất
Motor Control Front-End
The PIC17LC44T-08I/L is well-suited as a motor-control front-end for low-power stepper or DC brushless drives, leveraging its 33 I/O to interface Hall-effect sensors, optical encoders, and FET gate drivers. At 8 MHz the MCU executes feedback loops in approximately 121 ns per instruction, achieving closed-loop update rates above 10 kHz when servoing velocity or position. The wide 2.5 V to 6.0 V supply range supports battery-backed motor systems and 5 V industrial rails. Designers should pair the PIC17LC44 with external gate drivers and current-sense amplifiers.
Được đề xuất
Legacy Instrumentation
The PIC17LC44T-08I/L serves as a drop-in MCU replacement in legacy test and measurement instruments where original designs used the PIC17C4x family. Its 16 KB OTP, 454 bytes RAM, and 8 MHz throughput match the original performance envelope, allowing firmware written for the PIC17C4x instruction set to run unchanged. The 44-PLCC package fits existing board footprints. According to the manufacturer datasheet, the 8 MHz operation provides adequate computation for A/D sampling, key debounce, and front-panel handling in 1990s-era instruments.
Được đề xuất
Embedded Communication Bridges
The PIC17LC44T-08I/L is appropriate for protocol-conversion bridges that translate between legacy serial interfaces (RS-232, RS-485, I2C slave) and modern peripherals. With 33 I/O, the MCU can simultaneously drive UART, SPI, and I2C buses plus status LEDs. The 8 MHz clock and 121 ns instruction cycle sustain 9600 to 115200 baud UART rates with comfortable processing headroom. The industrial temperature grade and 2.5 V to 6.0 V supply tolerance suit the harsh electrical environments typical of industrial communication gateways.
Được đề xuất
Sensor Aggregation Nodes
The PIC17LC44T-08I/L works well in sensor aggregation nodes where multiple digital or analog inputs are sampled and forwarded over a serial link. With 33 I/O pins, the MCU can scan matrix keypads, multiple discrete sensors, or a parallel A/D converter. The 8 MHz throughput supports 1 kHz scan rates across dozens of channels. According to manufacturer datasheet specifications, the 454-byte RAM is sufficient to buffer measurement frames before transmission. Industrial temperature rating enables deployment in factory automation environments.
Được đề xuất
Embedded Display Controllers
The PIC17LC44T-08I/L can drive multiplexed character LCDs or simple graphic displays through its 33 I/O pins. With 16 KB OTP it accommodates custom character tables, menu state machines, and communication parsing for command-driven display panels. The 8 MHz operation sustains 60 Hz refresh rates for modest multiplexed LED matrices. According to manufacturer datasheet characteristics, the 2.5 V to 6.0 V supply range supports both 3.3 V and 5 V LCD modules without level shifters, simplifying BOM cost.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC17LC44T-08I/L — 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 | PIC17LC44-08I/L | PIC17LC44T-08/L | PIC17LC44-08/L | PIC17LC43T-08/L | PIC17LC43-08I/L |
|---|---|---|---|---|---|---|
| Package | 44-PLCC (16.59 x 16.59 mm) | 44-PLCC - same | 44-PLCC - same | 44-PLCC - same | 44-PLCC - same | 44-PLCC - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 16 KB OTP (8K x 16) | 16 KB OTP | 16 KB OTP | 16 KB OTP | 8 KB OTP (-50%) | 8 KB OTP (-50%) |
| Maximum Clock | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz |
| RAM | 454 bytes | 454 bytes | 454 bytes | 454 bytes | 454 bytes | 454 bytes |
| I/O Pins | 33 | 33 | 33 | 33 | 33 | 33 |
| Supply Voltage | 2.5 V to 6.0 V | 2.5 V to 6.0 V | 2.5 V to 6.0 V | 2.5 V to 6.0 V | 2.5 V to 6.0 V | 2.5 V to 6.0 V |
| Temperature Grade | Industrial (-40 °C to +85 °C) | Industrial | Commercial (0 °C to +70 °C) | Commercial | Commercial | Industrial |
Bảo phân biệt quan trọng
- Largest OTP memory in the PIC17C4x 44-PLCC family (vsPIC17LC43T-08/L)
- Industrial temperature grade for harsh environments (vsPIC17LC44T-08/L)
- Tape-and-reel packaging for high-volume SMT assembly (vsPIC17LC44-08I/L)
Ghi chú thiết kế
Place a 0.1 µF decoupling capacitor as close as possible to the VDD pin (pin 18) to suppress high-frequency noise from the digital switching currents. Add a bulk 10 µF tantalum or ceramic capacitor on the same VDD rail within 25 mm of the device. The PIC17LC44T-08I/L draws peak transient currents during instruction fetches, so the decoupling network must maintain low impedance from 1 MHz to 100 MHz to prevent logic errors.
When migrating firmware between PIC17LC44 PLCC and PIC17LC44 PQFP packages, verify pinout assignments before PCB respin. The 44-PLCC and 44-PQFP pinouts are NOT identical; some I/O ports are remapped between package variants. Also confirm MCLR/VPP behavior - the MCLR pin (pin 40) must be pulled high via a 10 kΩ resistor for normal operation and driven low to reset.
OTP programming requires VPP (typically 13 V to 14 V) applied to the MCLR pin during programming cycles. Ensure your device programmer supports the PIC17C OTP algorithm; PIC17C parts use a different programming protocol than PIC16F/PIC18F devices. In-circuit programming is not supported on this OTP part - programming must occur before PCB mounting or via socketed adapters.
Thông tin tuân thủ
RoHS compliance verified per manufacturer product page. AEC-Q100 not applicable - this is a legacy industrial MCU, not automotive-qualified.
