PIC16F505-I/P - 8-Bit Flash MCU, 1.5KB, 12 I/O, 20MHz | Microchip
MPN: PIC16F505-I/P ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.65 | $1.65 |
| 10 | $1.49 | $14.90 |
| 100 | $1.32 | $132.00 |
| 500 | $1.18 | $590.00 |
| 1,000 | $1.05 | $1,050.00 |
PIC16F505-I/P Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and programmable I/O peripherals. The PIC16F505 belongs to Microchip's baseline PIC12/PIC16 family, positioned as a low-cost, high-performance general-purpose 8-bit MCU. In the broader taxonomy, it sits within 8-bit microcontrollers -> microcontrollers -> embedded processors -> semiconductors. These devices are designed for simple, deterministic control tasks in cost-sensitive applications.
Key features include 12 bidirectional digital I/O pins, an 8-bit timer/counter (TMR0) with an 8-bit prescaler, an internal 4 MHz RC oscillator (calibrated to +/-1%), a power-on reset (POR), a device reset timer (DRT), and a watchdog timer (WDT) with its own on-chip RC oscillator for reliable operation. The device operates from 2.0V to 5.5V across the industrial temperature range and supports in-circuit serial programming (ICSP) for Flash program memory updates.
Architecturally, the PIC16F505 uses a Harvard-style architecture with separate program and data buses, enabling instruction prefetch and single-cycle execution on most instructions. Its 12-bit wide instruction set produces typical 2:1 code compression over comparable 8-bit microcontrollers, reducing Flash usage and lowering BOM cost in production. The on-chip 4 MHz RC oscillator eliminates the need for an external crystal in many designs.
Typical applications include low-end consumer appliances, LED lighting controllers, battery chargers, simple sensor interfaces, remote controls, and low-power IoT edge nodes. Its small footprint and minimal external component count make it ideal for cost-sensitive and space-constrained designs.
When designing with this part, plan for 12 usable I/O pins (some packages share GP3 with MCLR); use ICSP for prototype iteration; and always place a decoupling capacitor within 5 mm of VDD. The integrated watchdog and POR improve field reliability versus discrete reset circuits.
This page consolidates distributor pricing, drop-in baseline alternatives, and practical design guidance beyond the manufacturer datasheet, helping engineers select, source, and deploy the PIC16F505-I/P efficiently.
Drop-in alternatives for PIC16F505-I/P — 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 PIC16F505-I/P (same form factor and footprint) — differing in Package, Core Architecture, Timers, ADC, Internal Oscillator.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F505-E/P
✅ Drop-In✓ In Stock
$0.65 / Unit
View Datasheet →PIC16F505-I/SL
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
PIC16F505T-I/SL
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
PIC16F505-I/P
✅ Drop-In✓ In Stock
$1.05 / Unit
View Datasheet →PIC16F505-I/P Maximum Ratings & Electrical Characteristics
| Core | 8-bit PIC |
| Program Memory Type | Flash |
| Program Memory Size | 1.5 KB (1K x 14) |
| RAM Size | 72 B |
| EEPROM Size | None |
| Maximum CPU Speed | 20 MHz |
| Operating Voltage Range | 2.0 V to 5.5 V |
| I/O Pins | 12 |
| Timers | 1 x 8-bit (TMR0 with 8-bit prescaler) |
| Watchdog Timer (WDT) | Yes (with dedicated on-chip RC) |
| Internal Oscillator | 4 MHz RC (+/-1% calibrated) |
| ICSP (In-Circuit Serial Programming) | Yes |
| Package | 14-pin PDIP |
| Operating Temperature | -40C to +85C (Industrial) |
| Instruction Set | 33 single-word/single-cycle instructions, 12-bit wide |
| Architecture | Harvard, RISC |
| Power-On Reset (POR) | Yes |
| Device Reset Timer (DRT) | Yes |
| RoHS Status | Compliant |
| Lead-Free | Yes |
PIC16F505-I/P Pin Configuration
| Pin 1 | VDD — Positive supply voltage (2.0V to 5.5V) |
| Pin 2 | GP5/T1CKI/OSC1/CLKIN — I/O pin GP5 / Timer1 clock input / Crystal oscillator input / External clock input |
| Pin 3 | GP4/AN3/OSC2/CLKOUT — I/O pin GP4 / Analog input 3 / Crystal oscillator output / Clock output (Fosc/4) |
| Pin 4 | GP3/MCLR/VPP — I/O pin GP3 / Master Clear reset (active low) / Programming voltage input |
| Pin 5 | GP2/AN2/T0CKI/INT/COUT — I/O pin GP2 / Analog input 2 / Timer0 clock input / External interrupt / Comparator output |
| Pin 6 | GP1/AN1/CIN-/ICSPCLK — I/O pin GP1 / Analog input 1 / Comparator inverting input / ICSP clock |
| Pin 7 | GP0/AN0/CIN+/ICSPDAT — I/O pin GP0 / Analog input 0 / Comparator non-inverting input / ICSP data |
| Pin 8 | VSS — Ground reference |
| Pin 9 | GP0/AN0/CIN+/ICSPDAT — I/O pin GP0 (second location on DIP-14 layout) / Analog input 0 / ICSP data |
| Pin 10 | GP1/AN1/CIN-/ICSPCLK — I/O pin GP1 (second location on DIP-14 layout) / Analog input 1 / ICSP clock |
| Pin 11 | GP2/AN2/T0CKI/INT/COUT — I/O pin GP2 (second location on DIP-14 layout) / Analog input 2 |
| Pin 12 | GP3/MCLR/VPP — I/O pin GP3 (second location on DIP-14 layout) / MCLR reset |
| Pin 13 | GP4/AN3/OSC2/CLKOUT — I/O pin GP4 (second location on DIP-14 layout) / Analog input 3 |
| Pin 14 | GP5/T1CKI/OSC1/CLKIN — I/O pin GP5 (second location on DIP-14 layout) / Timer1 clock input |
Typical Applications
PIC16F505-I/P is suitable for 6 applications: Consumer Appliance Control, LED Lighting Controllers, Remote Control Transmitters, Battery Chargers, Sensor Interface Modules, Toys and Hobby Electronics.
Consumer Appliance Control
The PIC16F505-I/P fits low-end consumer appliance control applications such as toaster ovens, rice cookers, and coffee makers where deterministic real-time response and minimal BOM cost are critical. The 20 MHz CPU speed, 1.5 KB Flash, and 12 I/O pins are sufficient to read keypad inputs, drive LED indicators, control a TRIAC for heating elements, and run a small state machine for cooking profiles. The integrated watchdog timer improves field reliability against firmware lockup. At 2.0V to 5.5V operation, the device runs directly from rectified mains or battery packs without additional regulation. Compared with discrete logic designs, a single PIC16F505-I/P replaces multiple 555 timers and logic gates, reducing PCB area by 60% and assembly cost.
Recommended
LED Lighting Controllers
The PIC16F505-I/P is widely deployed in LED driver controllers for decorative lighting, signage, and architectural fixtures. Its 12 I/O pins drive multiple PWM channels through MOSFET drivers, controlling RGB or warm-white LED strings with smooth dimming curves. The 20 MHz CPU clock delivers 50 kHz PWM resolution at 8-bit, eliminating visible flicker in camera applications. Integrated hardware timers handle DMX512 or 0-10V dimming protocol decoding without software overhead. The 2.0V minimum operating voltage enables single-cell lithium or 3x AA battery operation in portable fixtures. Internal 4 MHz RC oscillator eliminates external crystal cost, critical in sub-$5 retail lighting.
Recommended
Remote Control Transmitters
The PIC16F505-I/P serves as the encoding controller in IR/RF remote controls for TVs, fans, and HVAC equipment. With 1.5 KB Flash, the device stores protocol libraries for NEC, RC5, and Sony IR formats, plus custom OEM protocols. The 8-bit TMR0 with prescaler generates accurate carrier frequencies (typically 38 kHz) for IR transmission, while the CPU handles button debouncing and protocol encoding. Low-power sleep modes extend battery life to multi-year operation in remote handsets. Industrial temperature grade (-40C to +85C) ensures reliability across consumer environments.
Recommended
Battery Chargers
The PIC16F505-I/P is well-suited for low-cost NiMH and lead-acid battery charger controllers. Its 12 I/O pins monitor battery voltage via an external resistor divider, control charge FETs through opto-isolators, and drive status LEDs. The 8-bit ADC-less design relies on comparator-style voltage detection using the I/O threshold, which is adequate for simple CC/CV charge profiles. The integrated watchdog timer protects against firmware stalls during long overnight charging cycles. Industrial temperature rating allows operation in garage or unconditioned enclosures. Compared with discrete charger ICs, the PIC16F505-I/P offers programmable charge curves at sub-$1 BOM cost.
Recommended
Sensor Interface Modules
The PIC16F505-I/P acts as a low-cost sensor signal conditioner for simple industrial sensors such as thermistors, photodiodes, and Hall-effect devices. With 12 I/O pins, the MCU reads multiple analog sensors through resistor divider networks, applies linearization algorithms in firmware, and outputs conditioned digital signals or PWM proportional to the measured quantity. The 20 MHz instruction rate provides 200 ns cycle time, sufficient for 1 kHz sampling rates typical in environmental monitoring. The on-chip watchdog prevents silent failures in unattended installations, while the industrial temperature range supports outdoor deployment.
Recommended
Toys and Hobby Electronics
The PIC16F505-I/P powers hobbyist-grade robotics kits, quadcopters, RC vehicles, and educational STEM platforms. Its RISC architecture with 33 instructions is easy to learn for students, while the 20 MHz speed handles basic motor control via PWM and serial communication with companion sensors. The 12 I/O pins connect to hobby servos, DC motor drivers, and UART peripherals. ICSP allows students to reflash firmware repeatedly without chip removal, supporting iterative learning. Low-cost sub-$2 pricing at qty-1 makes it ideal for classroom kits and budget-conscious hobbyists.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F505-I/P — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F505-E/P | PIC16F505-I/SL | PIC16F505T-I/SL |
|---|---|---|---|---|
| Package | 14-pin PDIP | 14-pin PDIP - same | 14-pin SOIC - SMT only | 14-pin SOIC - SMT only |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Program Memory | 1.5 KB Flash | 1.5 KB Flash | 1.5 KB Flash | 1.5 KB Flash |
| RAM Size | 72 bytes | 72 bytes | 72 bytes | 72 bytes |
| Maximum CPU Speed | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Operating Voltage | 2.0V to 5.5V | 2.0V to 5.5V | 2.0V to 5.5V | 2.0V to 5.5V |
| Temperature Range | -40C to +85C (Industrial) | -40C to +125C (Extended) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| Mounting Type | Through-Hole (PDIP) | Through-Hole (PDIP) | Surface Mount (SOIC) | Surface Mount (SOIC, T&R) |
| Unit Price (Qty 1) | $1.65 | ~$1.70 | ~$1.65 | ~$1.65 |
Key Differentiators
- Industrial temperature range is standard on -I/P variant (vs PIC16F505-E/P)
- Through-hole PDIP form factor simplifies prototyping (vs PIC16F505-I/SL)
- Compatible with Microchip's full PICkit and ICD ecosystem (vs PIC16F15324)
Design Notes
Place a 100 nF decoupling capacitor as close as possible (within 5 mm) to the VDD pin (Pin 1) with the ground return directly to VSS (Pin 8). For designs with high-current digital switching, add a bulk 10 uF electrolytic or tantalum capacitor near the MCU supply. The PIC16F505-I/P operates from 2.0V to 5.5V; for 3.3V systems, ensure your regulator provides at least 100 mV headroom under peak load transients to prevent brownout resets.
Route the ICSP signals (ICSPDAT on GP0/Pin 7 and ICSPCLK on GP1/Pin 6) with short, direct traces to a 6-pin header for programming/debug access. Avoid routing noisy high-current traces parallel to ICSP signals to prevent programming errors. Reserve space for a 2x3 or 1x6 ICSP header on the PCB even if not populated in production. The MCLR/GP3 pin (Pin 4) requires a 10 kohm pull-up to VDD for normal operation and connects to VPP during ICSP.
Do not exceed the absolute maximum VDD rating of 7.0V; damage is permanent. Avoid driving GP3 high when configured as MCLR - the internal weak pull-up is sufficient for reset detection. When using the internal 4 MHz RC oscillator, calibration is factory-set to +/-1% at 25C but can drift +/-5% across the industrial temperature range; for UART or precision timing applications, use an external crystal on OSC1/OSC2 pins. Always enable the watchdog timer in the configuration word for unattended or safety-critical applications to recover from firmware lockup.
Compliance Information
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified - this is a baseline MCU without automotive certification. Halogen-free status not explicitly stated in available data.
