PIC16F505-E/ST - 8-bit PIC MCU, 1.5KB Flash, 20MHz | Microchip
MPN: PIC16F505-E/ST ✓ Hoạt độngPIC16F505-E/ST Tóm tắt
A PIC microcontroller is a compact, low-power, programmable system-on-chip that integrates an 8-bit CPU core, Flash program memory, SRAM data memory, EEPROM or self-programmable Flash, timers, comparators, ADCs, and digital I/O into a single package. PIC MCUs sit within the broader hierarchy of microcontrollers -> microcontrollers with integrated peripherals -> embedded controllers -> semiconductors. The PIC16F505 belongs to Microchip's legacy 14-pin PIC10/12/16 mid-range family, which remains popular for cost-sensitive, space-constrained designs where every I/O and every penny of BOM cost matters.
Key features of the PIC16F505 include an internal 4 MHz RC oscillator with software calibration, two analog comparators, one 8-bit timer with 8-bit prescaler, one Watchdog Timer with its own on-chip RC oscillator, in-circuit serial programming (ICSP), and a wide 2.0 V to 5.5 V operating voltage range. The 14-pin TSSOP (Thin Shrink Small Outline Package, 0.173-inch / 4.4 mm body width) keeps board footprint small while still providing all 11 usable I/O pins. The -E suffix denotes the extended industrial temperature range of -40C to +125C.
Architecturally, the PIC16F505 uses a 14-bit program word width optimized for compact code density rather than maximum throughput. Its RISC-like instruction set and Harvard bus architecture (separate program and data paths) yield deterministic interrupt latency, which is valuable in real-time control loops. The device supports ICSP via two pins (RB6/ICSPCLK and RB7/ICSPDAT), enabling firmware updates after PCB assembly without an external socket.
Typical applications for the PIC16F505-E/ST include low-cost consumer appliances, battery-powered sensor nodes, LED drivers and lighting controllers, simple motor-control logic, automotive body electronics sub-modules, hobbyist and educational projects, and replacement of discrete logic ICs in legacy designs. Any embedded design that needs 8-bit deterministic control in a 14-pin footprint is a strong fit.
When designing with this part, plan your I/O allocation carefully: only 11 of the 14 pins are bonded out as GPIO, and two of those double as ICSP, so production firmware should not permanently consume RB6/RB7. Add a 0.1 uF decoupling capacitor adjacent to VDD and reserve the MCLR pin for a proper reset network.
This page synthesizes distributor pricing as of 2026-09-21, drop-in alternatives, and practical design notes not found in the standalone manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho PIC16F505-E/ST — 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 PIC16F505-E/ST (cùng hình factor và footprint) — khác nhau ở Internal Oscillator, Package, Timers, Core, Instruction Set.
PIC16F505-I/ST
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16F505T-E/ST
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16F505T-I/ST
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F505-H/ST
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC16F505-E/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F505-E/ST Tỷ lệ tối đa & tính chất điện
| Core Architecture | 8-bit PIC mid-range |
| Program Memory Type | Flash |
| Program Memory Size | 1.5 KB (1K x 12) |
| RAM Size | 72 bytes |
| Data EEPROM | None (self-programmable Flash option) |
| Maximum CPU Frequency | 20 MHz |
| Instruction Width | 12 bits |
| Number of I/O Pins | 11 |
| Operating Voltage Range | 2.0 V to 5.5 V |
| Khoảng nhiệt độ hoạt động | -40 C to +125 C (extended, -E grade) |
| Hộp | 14-TSSOP (4.4 mm body width) |
| Kiểu lắp đặt | Surface Mount |
| Timers | 1 x 8-bit with 8-bit prescaler + WDT |
| Comparators | 2 analog comparators |
| Internal Oscillator | 4 MHz RC, software calibrated |
| ICSP | Yes (RB6/RB7) |
| Cấp MSL | 1 (unlimited floor life) |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC16F505-E/ST
| Chân 1 | VDD — Positive supply voltage, 2.0 V to 5.5 V |
| Chân 2 | T0CKI/GP5/RB5 — GPIO RB5 / Timer0 external clock input |
| Chân 3 | GP4/RB4 — GPIO RB4 |
| Chân 4 | GP3/RB3/MCLR — GPIO RB3 / Master Clear reset (active low) |
| Chân 5 | GP2/RB2 — GPIO RB2 |
| Chân 6 | GP1/RB1 — GPIO RB1 |
| Chân 7 | GP0/RB0 — GPIO RB0 |
| Chân 8 | VSS — Ground reference |
| Chân 9 | GP6/RB6/ICSPCLK — GPIO RB6 / ICSP clock |
| Chân 10 | GP7/RB7/ICSPDAT — GPIO RB7 / ICSP data |
| Chân 11 | OSCCAL/RA1 — Oscillator calibration / GPIO RA1 |
| Chân 12 | RA2 — GPIO RA2 |
| Chân 13 | RA0 — GPIO RA0 |
| Chân 14 | VSS — Ground reference |
Ứng dụng tiêu biểu
PIC16F505-E/ST phù hợp cho 6 Áp dụngs: Low-Cost Consumer Appliance Control, Battery-Powered Sensor Node, LED Lighting Controller, Automotive Body Electronics Sub-Module, Replacement of Discrete Logic ICs, Hobbyist and Educational Development.
Low-Cost Consumer Appliance Control
The PIC16F505-E/ST fits low-cost consumer appliance control because it delivers 8-bit deterministic control in a 14-TSSOP with 11 GPIO and 2.0-5.5 V VDD. With 1.5 KB Flash, 72 B RAM, 20 MHz CPU, and 2 analog comparators, the part can sense temperature via NTC resistor divider, drive triac or relay via opto-isolated TRIAC driver, and run a state-machine user interface on a few LEDs. Its 12-bit wide instruction set compresses typical control code 2:1, and the internal 4 MHz calibrated oscillator removes external crystal cost. Designers should reserve RB6/RB7 for ICSP during development and migrate to production firmware that leaves MCLR tied high through a 10 kohm resistor plus 100 nF decoupling.
Được đề xuất
Battery-Powered Sensor Node
Battery-powered wireless sensor nodes benefit from the PIC16F505-E/ST's 2.0 V to 5.5 V wide operating range, internal 4 MHz RC oscillator (no external crystal), and 72 B RAM. The 8-bit core can sleep under software control waking on comparator interrupt, sample a thermistor divider through the analog comparator, and transmit via a low-power RF IC such as the CC1101 over a SPI-like bit-bang. With 11 GPIO the MCU can drive an LED indicator, a pushbutton, and a sensor enable pin while sharing RB6/RB7 for ICSP. Estimated: at 1 MHz CPU, 3.0 V VDD, and 10 percent duty cycle active, average current consumption can stay under 100 uA enabling coin-cell life of multiple years.
Được đề xuất
LED Lighting Controller
The PIC16F505-E/ST is a strong fit for entry-level LED lighting controllers driving a few channels of PWM-controlled LEDs or LED strips. Its 8-bit timer with 8-bit prescaler produces 8-bit PWM resolution, and the 20 MHz instruction rate supports software-PWM frequencies above 100 Hz avoiding visible flicker. The two analog comparators can sense ambient light via photodiode for daylight harvesting without an external op-amp. Place a 0.1 uF ceramic decoupling cap adjacent to VDD, and use RB6/RB7 only during in-circuit programming; in production firmware reserve them as GPIO. The -40 C to +125 C extended grade allows placement inside sealed luminaires where case temperature may exceed +85 C.
Được đề xuất
Automotive Body Electronics Sub-Module
The PIC16F505-E/ST's -40 C to +125 C extended operating range and small TSSOP footprint suit non-safety automotive body modules such as ambient lighting controllers, mirror adjusters, or accessory timers. The MCU's 2.0 V to 5.5 V VDD tolerates cranking transients when paired with a TVS diode and bulk capacitor. Two analog comparators can monitor current shunt or button inputs directly. Note that this part is NOT AEC-Q100 qualified; for safety-critical or powertrain modules use a PIC16F1xxx AEC-Q100 qualified family member. The 14-TSSOP package's MSL 1 rating simplifies automotive SMT production without dry-pack baking.
Được đề xuất
Replacement of Discrete Logic ICs
The PIC16F505-E/ST can replace 74-series discrete logic gates, flip-flops, and small state machines in legacy designs where it is cheaper than the discrete IC set it replaces. With 11 GPIO, two comparators, and an 8-bit timer, a single PIC16F505-E/ST can replace a 74HC00 quad NAND plus a 555 timer plus a 74HC74 flip-flop pair, shrinking PCB area and BOM count. The 14-TSSOP footprint is compatible with hand-solder rework using a fine-tip iron. Use the ICSP header on RB6/RB7 to update logic without changing PCB artwork. Engineers migrating legacy 5 V logic boards should verify timing margins since PIC16F505 instruction cycle is 200 ns at 20 MHz versus 74HC at 6 ns.
Được đề xuất
Hobbyist and Educational Development
The PIC16F505-E/ST is widely used in hobbyist, education, and entry-level embedded curricula because it is in-circuit programmable via a PICKit 3 or PICKit 5 debugger over the two-wire ICSP pins RB6 (clock) and RB7 (data). Its 1.5 KB Flash and 72 B RAM are sized for simple textbook programs (LED blink, switch debounce, PWM servo control). The 14-TSSOP breakouts are inexpensive from LCSC. Students learn Harvard architecture, accumulator-based CPU, and bit-banged peripherals without the complexity of ARM Cortex-M interrupts. The internal 4 MHz calibrated RC oscillator means no external crystal is required for first hardware bring-up.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16F505-E/ST — 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 | PIC16F505-I/ST | PIC16F505T-E/ST | PIC16F505T-I/ST | PIC16F505-H/ST | PIC16F505-E/P |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 14-TSSOP | 14-TSSOP - same | 14-TSSOP - same | 14-TSSOP - same | 14-TSSOP - same | 14-PDIP (through-hole) |
| Temperature Grade | Extended -40C to +125C (-E) | Industrial -40C to +85C (-I) | Extended -40C to +125C (-E) | Industrial -40C to +85C (-I) | High-temp grade (-H, varies) | Extended -40C to +125C (-E) |
| Program Memory | 1.5 KB Flash | 1.5 KB Flash | 1.5 KB Flash | 1.5 KB Flash | 1.5 KB Flash | 1.5 KB Flash |
| RAM | 72 bytes | 72 bytes | 72 bytes | 72 bytes | 72 bytes | 72 bytes |
| Maximum CPU Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Operating Voltage Range | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V |
| Pin Count / I/O | 14 pins / 11 I/O | 14 / 11 | 14 / 11 | 14 / 11 | 14 / 11 | 14 / 11 |
| Delivery Form | Tube | Tube | Tape & Reel | Tape & Reel | Tube (varies) | Tube (PDIP) |
Bảo phân biệt quan trọng
- Extended -40C to +125C operating temperature in compact 14-TSSOP (vsPIC16F505-I/ST)
- Tape and Reel packaging variant optimized for high-volume SMT (vsPIC16F505T-E/ST)
- Through-hole variant for breadboard and educational use (vsPIC16F505-E/P)
- Industry-standard 14-pin PIC mid-range architecture with Microchip MPLAB toolchain (vsPIC16F15324 (recommended migration target))
Ghi chú thiết kế
Place a 0.1 uF ceramic decoupling capacitor as close as possible to the VDD pin (pin 1) with the trace return path directly to the VSS pin (pin 8 or pin 14). For battery-powered designs add a 10 uF bulk capacitor near the MCU. The PIC16F505 will operate from 2.0 V to 5.5 V; if the supply is a switching converter, add a ferrite bead or LC pi-filter on the MCU VDD line to suppress switching noise coupling into the analog comparator inputs.
The PIC16F505 is in-circuit serial programmable via pins RB6 (ICSPCLK) and RB7 (ICSPDAT). On prototype boards always route these two pins to a 2x3 or 1x5 header so a PICKit 3 / PICKit 5 can attach. In production firmware you may reclaim RB6/RB7 as GPIO, but most designs keep them reserved for in-field firmware updates. Keep ICSP traces short (under 50 mm) and avoid running them parallel to switching converter traces.
Common pitfalls: (1) leaving MCLR floating - always tie MCLR to VDD via a 10 kohm resistor with a 100 nF cap to ground for a clean reset; (2) forgetting the 0.1 uF VDD bypass cap, which can cause ADC/comparator noise and intermittent brown-out resets; (3) drawing more than 25 mA per GPIO or 200 mA total VDD current without verifying the absolute maximum ratings in the datasheet; (4) assuming RB6/RB7 are always free GPIO - they double as ICSP and should be reserved during development.
Estimated: at maximum clock (20 MHz) and 5.5 V VDD with all GPIO toggling at 50 percent duty cycle, the PIC16F505-E/ST core current consumption is approximately 1.8 mA plus GPIO loading. Total package dissipation in a sealed enclosure near +125 C ambient stays well under 100 mW. The 14-TSSOP with theta_JA around 100 C/W can dissipate this with a small copper pour; no heatsink is required. Derate clock frequency above +85 C if your application requires 100 percent GPIO activity to stay within the thermal envelope.
Thông tin tuân thủ
RoHS and lead-free confirmed per Microchip product page; halogen-free status not explicitly stated in verified web data and left as unknown. AEC-Q100 not applicable - PIC16F505 is commercial/industrial, not automotive-qualified.
