PIC16LC505T-04I/SL - 8-bit OTP MCU, 1.5KB, 12 I/O | Microchip
Référence : PIC16LC505T-04I/SL ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $0.9 | $0,90 |
| 10 | $0.88 | $8,80 |
| 100 | $0.82 | $82,00 |
| 500 | $0.76 | $380,00 |
| 1 000 | $0.7 | $700,00 |
PIC16LC505T-04I/SL Présentation
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.
Alternatives de remplacement direct pour PIC16LC505T-04I/SL — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec PIC16LC505T-04I/SL (même facteur de forme et même empreinte) — différant par Core Architecture, Program Memory Type, RAM Size, In-Circuit Serial Programming (ICSP), Operating Temperature Range.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
PIC16LC505-04I/SL
✅ Remplacement direct✓ En stock
$1.62 / unité
Voir la fiche technique →PIC16LC505T-04/SL
✅ Remplacement direct✓ En stock
$0.55 / unité
Voir la fiche technique →PIC16C505-04I/SL
✅ Remplacement direct✓ En stock
$0.6 / unité
Voir la fiche technique →PIC16F505-I/SL
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PIC16F505T-I/SL
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PIC16C505T-04/SL
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PIC16LC505T-04I/SL Valeurs maximales et caractéristiques électriques
| 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) |
| Plage de température de fonctionnement | -40 °C to +85 °C (Industrial) |
| Oscillator Type | External |
| Boîtier | 14-SOIC (0.154 inch / 3.90 mm body width) |
| Type de montage | 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 |
Configuration des broches de PIC16LC505T-04I/SL
| Broche 1 | VDD — Positive supply voltage (2.5V-5.5V) |
| Broche 2 | RA0/OSC1/CLKIN — Digital I/O / Oscillator input / Clock input |
| Broche 3 | RA1/OSC2/CLKOUT — Digital I/O / Oscillator output / Clock output |
| Broche 4 | RA2/T0CKI — Digital I/O / Timer0 clock input |
| Broche 5 | RA3/MCLR/VPP — Digital input / Master Clear reset (active low) / Programming voltage |
| Broche 6 | RA4/AN3 — Digital I/O / Analog input channel 3 |
| Broche 7 | VSS — Ground reference |
| Broche 8 | RB0/INT — Digital I/O / External interrupt input |
| Broche 9 | RB1 — Digital I/O |
| Broche 10 | RB2 — Digital I/O |
| Broche 11 | RB3 — Digital I/O |
| Broche 12 | RB4 — Digital I/O |
| Broche 13 | RB5 — Digital I/O |
| Broche 14 | RB6 — Digital I/O |
Applications typiques
PIC16LC505T-04I/SL convient pour 7 applications: 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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PIC16LC505T-04I/SL — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | 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%) |
Principaux différenciateurs
- Low-voltage LC core supports 2.5V-5.5V (vs 4.5V-5.5V on standard C variant) (vs PIC16C505-04I/SL)
- OTP cost advantage for high-volume locked firmware (vs PIC16F505-I/SL)
- Industrial -40 °C to +85 °C temperature range (vs PIC16LC505T-04/SL)
Notes de conception
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.
Informations de conformité
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.
