PIC16LC505T-04/SL - 8-Bit OTP MCU 1.5KB 4MHz SOIC-14 | Microchip
MPN: PIC16LC505T-04/SL ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.9 | $0.90 |
| 10 | $0.86 | $8.60 |
| 100 | $0.78 | $78.00 |
| 500 | $0.71 | $355.00 |
| 1,000 | $0.64 | $640.00 |
| 2,600 | $0.55 | $1,430.00 |
PIC16LC505T-04/SL Overview
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, working RAM, and peripheral I/O on one die. The PIC16C/LC505 family belongs to Microchip's PIC RISC architecture, whose reduced instruction set (33 single-word instructions) executes most instructions in a single instruction cycle, giving it a deterministic timing profile well suited to cost-sensitive real-time control. The 'LC' prefix denotes the low-voltage CMOS variant, allowing operation down to roughly 2.5V versus the standard 16C's 4.5V minimum.
Key features include 12 I/O pins with individually selectable direction, wake-up from sleep on I/O pin change, a 5-bit prescaler shared between WDT and Timer0, and low-power sleep mode that drops quiescent current into the microamp range. The 14-pin SOIC footprint measures 3.90mm body width and is one of the broadest SMD footprints in the 14-pin class, simplifying hand-soldering and inspection.
The PIC16LC505 uses a Harvard architecture with separate program and data buses, a 12-bit program word, and a single 8-bit working register plus 24 general-purpose SRAM registers. Its OTP program memory is programmed via ICSP, allowing firmware to be written after PCB assembly and eliminating the need for a pre-programmed ROM.
Typical applications include low-cost consumer appliances, battery-powered remote controls, simple sensor signal conditioning, automotive body electronics sub-modules, and standalone replacement of discrete logic. With only 1.5KB of code space, the part targets applications whose firmware footprint is below approximately 1000 instruction words.
When designing with this part, plan for an external oscillator or resonator since the datasheet specifies external oscillator type for -04 speed grade. OTP memory cannot be reprogrammed, so choose the FLASH-based PIC16F505 or PIC10F200 family if in-field firmware updates are required.
This page synthesizes distributor pricing, drop-in Microchip alternatives, and practical design notes not found in the manufacturer datasheet alone, helping engineers select and qualify the right PIC16C/LC505 variant for cost-sensitive 8-bit embedded designs.
Drop-in alternatives for PIC16LC505T-04/SL — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with PIC16LC505T-04/SL (same form factor and footprint) — differing in Core Architecture, Watchdog Timer, Instruction Cycle Time, Package, Product Family.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LC505-04/SL
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LC505T-04I/SL
✅ Drop-In✓ In Stock
$0.7 / Unit
View Datasheet →PIC16F505T-04/SL
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F505-04/SL
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16C505-04/SL
✅ Drop-In✓ In Stock
$1.05 / Unit
View Datasheet →PIC16C505T-04/SL
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LC505-04I/SL
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16HV540T-04/SO
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.2 / Unit
View Datasheet →PIC16LC505T-04/SL Maximum Ratings & Electrical Characteristics
| Product Family | PIC16C/LC505 |
| Core Architecture | 8-bit PIC RISC (Harvard) |
| Program Memory Type | OTP (One-Time-Programmable) EPROM |
| Program Memory Size | 1.5 KB (1K x 12) |
| RAM Size | 72 x 8 bytes |
| Maximum CPU Speed | 4 MHz |
| Supply Voltage | 3.3 V / 5 V (LC low-voltage variant) |
| Number of I/O Pins | 12 |
| Package / Case | 14-SOIC (0.154 inch / 3.90 mm width) |
| Oscillator Type | External |
| Packaging | Tape & Reel (T suffix) |
| Watchdog Timer | Yes, with dedicated on-chip RC oscillator |
| In-Circuit Serial Programming (ICSP) | Yes |
| Power-on Reset (POR) | Yes |
| Device Reset Timer (DRT) | Yes |
| Internal Weak Pull-ups | Yes, on I/O pins |
| Wake-up on Pin Change | Yes |
| Code Protection | Programmable |
| RoHS Status | Compliant |
PIC16LC505T-04/SL Pin Configuration
| Pin 1 | VDD — Positive power supply |
| Pin 2 | OSC1/GP5 — External oscillator input / general-purpose I/O |
| Pin 3 | OSC2/GP4 — External oscillator output / general-purpose I/O |
| Pin 4 | MCLR/VPP — Master clear reset (active low) / programming voltage |
| Pin 5 | GP0 — General-purpose I/O with weak pull-up |
| Pin 6 | GP1 — General-purpose I/O with weak pull-up |
| Pin 7 | GP2 — General-purpose I/O with weak pull-up |
| Pin 8 | GP3 — General-purpose I/O / ICSP clock input |
| Pin 9 | GP3 — General-purpose I/O (alternate) |
| Pin 10 | GP3 — General-purpose I/O (alternate) |
| Pin 11 | GP3 — General-purpose I/O (alternate) |
| Pin 12 | GP3 — General-purpose I/O (alternate) |
| Pin 13 | GP3 — General-purpose I/O (alternate) |
| Pin 14 | VSS — Ground reference |
Typical Applications
PIC16LC505T-04/SL is suitable for 6 applications: Low-Cost Consumer Appliance Control, Battery-Powered Remote Controls, Sensor Signal Conditioning and Threshold Detection, Automotive Body Electronics Sub-Modules, Standalone Discrete Logic Replacement, LED Lighting and Signage Controllers.
Low-Cost Consumer Appliance Control
The PIC16LC505T-04/SL suits consumer appliance control boards where firmware is finalized and unit cost dominates BOM economics. With 12 I/O pins, 4MHz CPU speed, and 1.5KB OTP program memory, the device can directly drive relay coils, read user buttons, multiplex 7-segment LED displays, and sequence motor start-up. The 14-pin SOIC footprint simplifies hand-soldering and rework during field service. Compared to discrete logic equivalents, the integrated WDT, POR, and ICSP reduce external component count by roughly 6 parts, lowering both PCB area and assembly cost.
Recommended
Battery-Powered Remote Controls
The PIC16LC505T-04/SL operates from a 2.5V to 5.5V supply, making it ideal for 2x AA or coin-cell battery-powered remote controls. Its 8-bit RISC core draws microamp-level sleep current, and the wake-up on pin change feature lets the device spend most of its life in deep sleep, waking only when a button is pressed. The 12 I/O pins comfortably handle 4x4 button matrices, IR LED drive, and status LEDs. Compared to CMOS 4000-series logic alternatives, the integrated MCU replaces 2-3 ICs and reduces standby current by 10x.
Recommended
Sensor Signal Conditioning and Threshold Detection
In low-bandwidth sensor front-ends - thermistor bridges, photodiode amplifiers, simple analog threshold detectors - the PIC16LC505T-04/SL provides on-chip ADC-free decision logic with sub-microamp sleep current. Combined with an external comparator, the device can read 1-2 analog channels, debounce a switch, and transmit a serial bitstream at 2400-9600 baud using bit-banged UART. The 1.5KB OTP space accommodates lookup tables for linearization. Compared to op-amp-only solutions, this approach reduces component count from 4 to 1 IC.
Recommended
Automotive Body Electronics Sub-Modules
Within an automotive body controller or door module, the PIC16LC505T-04/SL handles localized tasks such as mirror position memory, seat switch debouncing, and indicator sequencing where the ICSP enables late-stage firmware load. The 14-SOIC package withstands automotive thermal stress and the 4MHz CPU provides sufficient throughput for CAN-LIN gateway bit manipulation. Use the industrial-temperature -04I variant for AEC-Q100 sub-system designs. Compared to custom ASICs, this Microchip solution eliminates NRE cost and reduces time-to-prototype from months to weeks.
Recommended
Standalone Discrete Logic Replacement
Engineers often replace a 74HC00 or 74HC595 plus discrete logic board with a single PIC16LC505T-04/SL to consolidate 5-10 logic gates into one programmable device. With 12 I/O and 1.5KB of OTP program memory, the part can implement custom state machines, timing chains, and combinational decoders without external glue logic. Compared to equivalent discrete logic board real estate, the SOIC-14 IC saves roughly 60% PCB area and cuts quiescent current by an order of magnitude.
Recommended
LED Lighting and Signage Controllers
The PIC16LC505T-04/SL drives addressable LED strings and small dot-matrix signage by bit-banging WS2812 or similar protocols from 12 I/O pins at 4MHz. The internal weak pull-ups simplify button input, and the ICSP allows on-board firmware flashing for unique color patterns per installation. With sleep current in the microamp range, battery-powered LED decorations can run for months on a single coin cell. Compared to dedicated LED driver ICs, the LC505 adds arbitrary pattern logic without requiring external EEPROM.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LC505T-04/SL — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LC505-04/SL | PIC16LC505T-04I/SL | PIC16F505T-04/SL | PIC16F505-04/SL | PIC16C505-04/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 EPROM 1.5KB | OTP EPROM 1.5KB | OTP EPROM 1.5KB | FLASH 1.5KB (reprogrammable) | FLASH 1.5KB (reprogrammable) | OTP EPROM 1.5KB |
| Program Memory Size | 1.5 KB (1K x 12) | 1.5 KB | 1.5 KB | 1.5 KB | 1.5 KB | 1.5 KB |
| Maximum CPU Speed | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| Supply Voltage Range | 2.5 V to 5.5 V (LC variant) | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 4.5 V to 5.5 V |
| Number of I/O Pins | 12 | 12 | 12 | 12 | 12 | 12 |
| Operating Temperature | 0C to +70C (commercial) | 0C to +70C | -40C to +85C (industrial) | 0C to +70C | 0C to +70C | 0C to +70C |
Key Differentiators
- Low-voltage operation down to 2.5V (vs PIC16C505-04/SL)
- OTP for ultra-low per-unit cost (vs PIC16F505T-04/SL)
- Tape and Reel for high-volume assembly (vs PIC16LC505-04/SL)
Design Notes
Decouple VDD with a 100nF ceramic capacitor placed within 5mm of pin 1, plus a 10uF bulk capacitor if the supply is shared with relay coils or inductive loads. The PIC16LC505T-04/SL draws typically 1-2mA active and under 1uA in sleep, so the rail can be supplied by a low-cost LDO or even a CR2032 coin cell for low duty-cycle applications. Add a 10k pull-up to MCLR (pin 4) to ensure proper reset on power-up.
OTP memory cannot be erased or reprogrammed. Engineers using PIC16LC505T-04/SL in development should buy engineering samples from the PIC16F505 family first, validate firmware, then port the final HEX to the LC505 OTP for production. Programming must occur via ICSP (pin 4 MCLR/VPP, pin 8 GP3/ICSPCLK, pin 9 GP3/ICSPDAT) before final PCB conformal coating. Do not exceed VDD of 5.5V or the device may latch up.
Route the external oscillator traces (OSC1 pin 2, OSC2 pin 3) short and symmetric to minimize stray capacitance. Place the crystal or resonator within 10mm of the MCU and guard the traces with a ground pour. For RC oscillator configurations, keep the resistor close to OSC1 to avoid pickup. The 14-SOIC land pattern follows JEDEC SO-14 standard (3.90mm body, 1.27mm pitch) and accepts hand-soldering with a fine tip.
Compliance Information
RoHS and lead-free per Microchip product page. Industrial temperature variant PIC16LC505T-04I/SL is rated -40C to +85C but is not AEC-Q100 qualified; for automotive designs, verify with Microchip directly.
