PIC16LC505T-04I/SL - 8-bit OTP MCU, 1.5KB, 12 I/O | Microchip
MPN: PIC16LC505T-04I/SL ✓ Hoạt độngPIC16LC505T-04I/SL Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (program + data), and programmable I/O peripherals. The PIC16C505 family belongs to the 8-bit mid-range microcontrollers -> microcontrollers -> integrated circuits -> semiconductors hierarchy, with a RISC instruction set using only 33 single-word instructions that simplifies firmware development and accelerates time-to-market. This OTP variant is suited to volume production where code is finalized and no in-field re-programming is required, distinguishing it from the Flash-based PIC16F505 cousin.
Key features include In-Circuit Serial Programming (ICSP™) for programming after PCB assembly, Power-on Reset (POR) and Device Reset Timer (DRT) for clean startup, a Watchdog Timer (WDT) with dedicated on-chip RC oscillator for reliable operation, programmable code protection to lock firmware against readback, internal weak pull-ups on I/O pins, and wake-up from sleep on pin change. The industrial temperature range (-40°C to +85°C) makes the device suitable for harsh-environment deployments.
The PIC16LC505 uses a Harvard architecture with separated program and data buses, enabling single-cycle instruction fetch and execution. Its 14-bit instruction word and 8-bit data path deliver compact code density, while the 33-instruction RISC core achieves predictable timing that simplifies real-time control loops. The 4 MHz oscillator supports external clock/crystal/RC modes depending on application requirements.
Typical applications include consumer appliance control, sensor interface modules, LED lighting controllers, low-cost motor control, and battery-powered remote sensor nodes. The wide 2.5V-5.5V operating range plus low-power sleep modes (wakeup-on-change) make it ideal for energy-harvesting or always-on embedded designs.
When designing with this part, note that OTP memory cannot be erased - prototype with the Flash-based PIC16F505-I/SL and migrate to the LC505 for production. Decoupling: place a 100 nF ceramic capacitor as close as possible to VDD, and consider a 10 µF bulk capacitor on the supply rail. Ensure the MCLR pin has proper reset-circuit design per the datasheet.
This page synthesizes distributor pricing from DigiKey and Mouser, datasheet-verified specifications, drop-in same-package alternatives (PIC16LC505-04I/SL, PIC16C505 variants), and engineering design notes not consolidated in the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho PIC16LC505T-04I/SL — 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 PIC16LC505T-04I/SL (cùng hình factor và footprint) — khác nhau ở Core Architecture, Program Memory Type, RAM Size, In-Circuit Serial Programming (ICSP), Operating Temperature Range.
PIC16LC505-04I/SL
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LC505T-04/SL
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C505-04I/SL
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F505-I/SL
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16F505T-I/SL
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16C505T-04/SL
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16LC505T-04I/SL Tỷ lệ tối đa & tính chất điện
| Product Type | 8-bit Microcontroller (MCU) |
| Core Architecture | PIC® 16C (RISC, Harvard) |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 1.5 KB (1K x 12) |
| RAM Size | 72 x 8 bytes |
| Number of I/O Pins | 12 |
| Maximum CPU Frequency | 4 MHz |
| Instruction Cycle Time | 200 ns |
| Instruction Set Size | 33 single-word instructions |
| Operating Voltage Range | 2.5 V to 5.5 V (LC low-voltage core) |
| Khoảng nhiệt độ hoạt động | -40 °C to +85 °C (Industrial) |
| Oscillator Type | External |
| Hộp | 14-SOIC (0.154 inch / 3.90 mm body width) |
| Kiểu lắp đặt | Surface Mount |
| Packaging | Tape & Reel (T suffix) |
| ICSP™ In-Circuit Serial Programming | Yes |
| Watchdog Timer (WDT) | Yes, with dedicated on-chip RC oscillator |
| Power-on Reset (POR) / DRT | Yes |
| Internal Weak Pull-ups on I/O | Yes |
| Wake-up from Sleep on Pin Change | Yes |
| Programmable Code Protection | Yes |
Cấu hình chân PIC16LC505T-04I/SL
| Chân 1 | VDD — Positive supply voltage (2.5V-5.5V) |
| Chân 2 | RA0/OSC1/CLKIN — Digital I/O / Oscillator input / Clock input |
| Chân 3 | RA1/OSC2/CLKOUT — Digital I/O / Oscillator output / Clock output |
| Chân 4 | RA2/T0CKI — Digital I/O / Timer0 clock input |
| Chân 5 | RA3/MCLR/VPP — Digital input / Master Clear reset (active low) / Programming voltage |
| Chân 6 | RA4/AN3 — Digital I/O / Analog input channel 3 |
| Chân 7 | VSS — Ground reference |
| Chân 8 | RB0/INT — Digital I/O / External interrupt input |
| Chân 9 | RB1 — Digital I/O |
| Chân 10 | RB2 — Digital I/O |
| Chân 11 | RB3 — Digital I/O |
| Chân 12 | RB4 — Digital I/O |
| Chân 13 | RB5 — Digital I/O |
| Chân 14 | RB6 — Digital I/O |
Ứng dụng tiêu biểu
PIC16LC505T-04I/SL phù hợp cho 7 Áp dụngs: Consumer Appliance Control, Battery-Powered Sensor Nodes, LED Lighting Controllers, Industrial Control Modules, Remote Control / IR Transmitter, Low-Cost Motor Control, Automotive Aftermarket Accessories.
Consumer Appliance Control
The PIC16LC505T-04I/SL is well-suited for cost-sensitive consumer appliance control boards such as coffee makers, blenders, and small kitchen devices. The 12 I/O pins directly drive LEDs, keypad matrices, and triac-fired heater elements, while the 33-instruction RISC core executes timing-critical control loops with predictable 200 ns instruction cycles. Its 2.5V-5.5V operating range accommodates both 3.3V and 5V supply topologies, and the on-chip Watchdog Timer with dedicated RC oscillator ensures reliable recovery from firmware lockups in unattended appliances. The OTP program memory at 1.5KB is ample for sequencer state machines and temperature-profiling firmware.
Được đề xuất
Battery-Powered Sensor Nodes
The PIC16LC505T-04I/SL operates across 2.5V-5.5V, making it compatible with two-cell AA/AAA (3V nominal) and single-cell Li-ion (3.7V nominal) battery stacks used in remote wireless sensor nodes. Its 72 bytes of RAM supports small sensor-fusion buffers, while the wake-up from sleep on pin-change feature enables sub-µA quiescent current when paired with external RTC or sensor interrupt logic. The industrial temperature range (-40 °C to +85 °C) is critical for outdoor or HVAC-deployed sensors. The 12 I/O can directly interface SPI/ICSP temperature/humidity sensors and an RF transmitter module.
Được đề xuất
LED Lighting Controllers
In LED lighting controller applications the PIC16LC505T-04I/SL drives PWM channels to dim RGB or single-channel LED strings. The 4 MHz core provides 1 µs instruction throughput, sufficient for 8-bit PWM at 1 kHz update rates with multiple channels. Internal weak pull-ups simplify button-input wiring on wall dimmers, while the Watchdog Timer prevents dimmer-lockup in commercial-grade luminaires. The 14-SOIC package is small enough to fit inside GU10 lamp bases and MR16 housings. Combined with a 3.3V LDO, this MCU can replace 555-timer-based legacy PWM circuits with digital control.
Được đề xuất
Industrial Control Modules
The PIC16LC505T-04I/SL serves industrial PLC-style I/O expansion modules where its 12 I/O pins handle digital inputs (limit switches, opto-isolated 24V signals via resistor dividers) and outputs (relay drivers, optocoupler interfaces). The industrial temperature range (-40 °C to +85 °C) and on-chip Watchdog Timer with dedicated RC oscillator support factory-floor reliability requirements. The 200 ns instruction cycle enables deterministic scan times under 100 µs for fast event response. Programmable code protection prevents firmware IP theft in commercial modules. ICSP™ allows firmware updates via a programming header after conformal coating.
Được đề xuất
Remote Control / IR Transmitter
Handheld IR remote controls and RF key-fob transmitters benefit from the PIC16LC505T-04I/SL's low-voltage 2.5V-5.5V operation directly from coin-cell or two-AAA batteries. The 12 I/O pins support a 4x4 keypad matrix plus IR/RF transmitter output, while the wake-up from sleep feature minimizes standby current between button presses. The 200 ns instruction cycle is fast enough to generate 38 kHz carrier-modulated IR protocols (RC5, NEC, SIRC) in firmware. The 1.5KB OTP memory fits the most complex universal remote code libraries. Industrial temperature grade suits automotive garage-door and gate-controller applications.
Được đề xuất
Low-Cost Motor Control
Small brushed DC motor and stepper motor controllers in fans, pumps, and small appliances use the PIC16LC505T-04I/SL as the supervisory MCU alongside dedicated motor-driver ICs. The 4 MHz core executes trapezoidal acceleration profiles and PWM commutation at refresh rates sufficient for smooth low-RPM operation. The Watchdog Timer prevents motor-stall firmware lockup. The 12 I/O can drive direction logic, enable signals, fault-feedback lines, and tachometer input from Hall sensors. Industrial temperature rating supports under-hood automotive accessories and outdoor HVAC actuator applications.
Được đề xuất
Automotive Aftermarket Accessories
Aftermarket automotive accessories such as alarm systems, LED accent light controllers, and seat-heater modules use the PIC16LC505T-04I/SL for its industrial temperature range and 5V tolerance of 12V battery transients (with external TVS protection). The 12 I/O pins interface door-trigger inputs, ignition-sense lines, and MOSFET gate drivers. The Watchdog Timer and Power-on Reset (POR) plus Device Reset Timer (DRT) provide robust operation in noisy automotive electrical environments. The OTP memory prevents end-user firmware tampering in commercial accessories. Note: for OEM-grade designs, an AEC-Q100-qualified part should be selected instead.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16LC505T-04I/SL — 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 | PIC16LC505-04I/SL | PIC16LC505T-04/SL | PIC16C505-04I/SL | PIC16F505-I/SL | PIC16F505T-I/SL |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 14-SOIC (3.90 mm) | 14-SOIC (3.90 mm) - same | 14-SOIC (3.90 mm) - same | 14-SOIC (3.90 mm) - same | 14-SOIC (3.90 mm) - same | 14-SOIC (3.90 mm) - same |
| Program Memory Type | OTP (1.5 KB) | OTP (1.5 KB) | OTP (1.5 KB) | OTP (1.5 KB) | Flash (1.5 KB) | Flash (1.5 KB) |
| Operating Voltage | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 4.5 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V |
| Max CPU Frequency | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 20 MHz (20X faster) | 20 MHz (20X faster) |
| Temperature Range | -40 °C to +85 °C (Industrial) | -40 °C to +85 °C (Industrial) | 0 °C to +70 °C (Commercial) | -40 °C to +85 °C (Industrial) | -40 °C to +85 °C (Industrial) | -40 °C to +85 °C (Industrial) |
| RAM Size | 72 bytes | 72 bytes | 72 bytes | 72 bytes | 72 bytes | 72 bytes |
| Number of I/O Pins | 12 | 12 | 12 | 12 | 12 | 12 |
| Approx. Unit Price (1 pc) | $0.90 | $0.90 (similar) | $0.85 (similar) | $0.95 (similar) | $1.20 (Flash premium ~30%) | $1.20 (Flash premium ~30%) |
Bảo phân biệt quan trọng
- Low-voltage LC core supports 2.5V-5.5V (vs 4.5V-5.5V on standard C variant) (vsPIC16C505-04I/SL)
- OTP cost advantage for high-volume locked firmware (vsPIC16F505-I/SL)
- Industrial -40 °C to +85 °C temperature range (vsPIC16LC505T-04/SL)
Ghi chú thiết kế
Place a 100 nF ceramic decoupling capacitor as close as possible to the VDD pin (pin 1) of the PIC16LC505T-04I/SL, with a 10 µF bulk capacitor on the supply rail. The PIC16C505 datasheet specifies a maximum VDD rise time of 0.05 V/µs - too-fast ramps may trigger POR prematurely. For battery applications, add a 10 kΩ external pull-up on MCLR to ensure clean power-on reset. The internal weak pull-ups on I/O pins (typically 20 kΩ-50 kΩ typical) are sufficient for most button-input designs but verify the source-impedance budget when driving multiple inputs simultaneously.
The PIC16LC505T-04I/SL is OTP (One-Time Programmable) - the program memory cannot be erased after programming. Always prototype with the Flash-based PIC16F505-I/SL, validate firmware thoroughly, then commit to the LC505 for production. Configuration bits such as watchdog enable, oscillator mode, and code protection must be set BEFORE programming - they cannot be changed later in OTP. The MCLR pin (pin 5) is dual-purpose: in normal operation it must be pulled high via external resistor (typically 10 kΩ); during ICSP™ programming, it carries the VPP programming voltage (typically 13V on this family).
For SOIC-14 PCB layout, allocate a copper pour of at least 0.5 in² connected to VSS for thermal dissipation and ground return. Keep crystal/oscillator traces short (under 10 mm) and route them away from RB port high-current switching traces to prevent injection of noise into the clock input. If using the ICSP™ interface, expose a 5-pin header (VDD, VSS, RB6/ICSPCLK, RB7/ICSPDAT, MCLR/VPP) to enable in-circuit programming after PCB assembly. Place a 100 nF capacitor on each VDD pin and route ground returns as a star pattern from the decoupling capacitor ground pad back to the VSS pin.
The PIC16LC505T-04I/SL operates at 4 MHz maximum with 200 ns instruction cycle time - well below any signal-integrity concern for the digital I/O pins. However, when driving long PCB traces (>50 mm) from the I/O pins, consider 22-33 Ω series damping resistors to control ringing. For EMI-sensitive applications, the Watchdog Timer with dedicated on-chip RC oscillator (not the system oscillator) ensures reliable firmware recovery even if the main oscillator is disturbed by EMI events. The internal weak pull-ups are NOT suitable as sole drive strength for I²C-like open-drain buses - use external 4.7 kΩ pull-ups if multi-device buses are needed.
Thông tin tuân thủ
Compliance data not present in verified web data; AEC-Q100 qualification not applicable - this is a mature industrial-grade part, not automotive-qualified. Designers requiring AEC-Q100 should consider PIC16F15313 or PIC16F15323 with explicit automotive part numbers.
