PIC18F23K20T-I/SS - 8KB Flash, 64MHz 8-bit MCU | Microchip
MPN: PIC18F23K20T-I/SS ✓ Hoạt độngPIC18F23K20T-I/SS Tóm tắt
What is a PIC18F microcontroller? The PIC18F is Microchip's high-performance 8-bit Harvard-architecture MCU family, positioned between the PIC16 mid-range family and the 16-bit dsPIC/PIC24 families. PIC18F devices add a 16-bit instruction word, hardware multiplier, C-friendly architecture, and rich peripheral integration, while remaining instruction-set compatible across the family for easy migration. They are widely used in cost-sensitive 5 V embedded designs that need reliable analog integration without a 32-bit ARM Cortex footprint.
Key features include 25 general-purpose I/O pins, a 10-bit ADC with up to 14 channels, two rail-to-rail analog comparators with programmable voltage reference, a 1.2 V fixed voltage reference, hardware PWM, three programmable external interrupts, four interrupt-on-change inputs, and nanoWatt XLP™ power-saving modes with sub-µA sleep current. The 64 MHz internal oscillator and 4x PLL support high-throughput control loops without an external crystal.
Architecturally, the PIC18F2XK20/4XK20 series combines an enhanced flash memory controller, a 31-level hardware stack, and self-programmable flash for bootloader-style in-field updates. The nanoWatt XLP technology extends battery life in energy-harvesting or periodically-woken systems by offering multiple idle/sleep modes with RAM retention, making the part suitable for ultra-low-power IoT sensor nodes.
Typical applications include industrial sensor conditioning, battery-powered metering, consumer appliance control, USB-to-UART bridges, HVAC thermostat controllers, automotive body and lighting subsystems, and small motor-control loops. The wide 1.8 V-3.6 V core operation (down to 2.0 V with full-spec ADC) plus 4.2 V-5.5 V extended range gives designers flexibility across 3.3 V and 5 V rails. Engineers should configure CONFIG bits carefully for oscillator, watchdog, brown-out, and code protection to match the application safety class.
This page synthesizes distributor pricing, drop-in alternative MPNs, application circuit references, and design notes not found on any single distributor listing.
Bộ thay thế dễ dàng lắp đặt cho PIC18F23K20T-I/SS — 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 PIC18F23K20T-I/SS (cùng hình factor và footprint) — khác nhau ở Package, Operating Temperature, Timers, ADC, RoHS Status.
PIC18F23K20-I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F23K20T-I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F23K20T-I/MV
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F23K20-E/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F24K20-I/SS
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC18F25K20-I/SS
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC18F23K20T-I/SS Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC18F 8-bit Harvard |
| Program Memory | 8 KB (4K x 16) Flash |
| SRAM | 512 bytes |
| EEPROM | 256 bytes |
| Maximum CPU Speed | 64 MHz (16 MIPS) |
| Supply Voltage (VDD) | 1.8 V to 3.6 V (4.2 V to 5.5 V extended, per datasheet) |
| I/O Pins | 25 |
| ADC | 10-bit, up to 14 channels |
| Analog Comparators | 2 (rail-to-rail, programmable VREF) |
| Timers | Multiple 8/16-bit with capture/compare/PWM |
| Hộp | 28-SSOP (5.30 mm body) |
| Nhiệt độ hoạt động | -40 °C to +85 °C (Industrial) |
| Technology | nanoWatt XLP™ |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
| Lead-Free / Pb-Free | Yes |
Cấu hình chân PIC18F23K20T-I/SS
| Chân 1 | RA0/AN0/CVREF/C1IN+/INT0/FLT0 — PORTA bit 0; analog input 0; CVREF output; comparator 1 non-inverting input; external interrupt 0; ECCP fault input |
| Chân 2 | RA1/AN1/C1IN-/VREF-/INT1 — PORTA bit 1; analog input 1; comparator 1 inverting input; ADC VREF-; external interrupt 1 |
| Chân 3 | RA2/AN2/VREF-/CVREF/C2IN+ — PORTA bit 2; analog input 2; ADC VREF-; CVREF output; comparator 2 non-inverting input |
| Chân 4 | RA3/AN3/VREF+/C1IN+ — PORTA bit 3; analog input 3; ADC VREF+; comparator 1 non-inverting input |
| Chân 5 | RA4/T0CKI/C1OUT — PORTA bit 4; Timer0 clock input; comparator 1 output |
| Chân 6 | RA5/AN4/SS1/HLVDIN/C2OUT — PORTA bit 5; analog input 4; SPI1 slave select; high/low voltage detect input; comparator 2 output |
| Chân 7 | VSS — Ground reference |
| Chân 8 | VDD — Positive supply voltage |
| Chân 9 | OSC1/RA7 — External oscillator input; PORTA bit 7 |
| Chân 10 | OSC2/RA6 — External oscillator output; PORTA bit 6 |
| Chân 11 | RC0/T1OSO/T1CKI — PORTC bit 0; Timer1 oscillator output; Timer1 clock input |
| Chân 12 | RC1/T1OSI/CCP2 — PORTC bit 1; Timer1 oscillator input; CCP2 capture/compare/PWM |
| Chân 13 | RC2/P1A/CCP1 — PORTC bit 2; PWM output P1A; CCP1 capture/compare/PWM |
| Chân 14 | RC3/SCK1/SCL1 — PORTC bit 3; SPI1 clock; I2C1 clock |
| Chân 15 | RC4/SDI1/SDA1 — PORTC bit 4; SPI1 data in; I2C1 data |
| Chân 16 | RC5/SDO1 — PORTC bit 5; SPI1 data out |
| Chân 17 | RC6/TX1/CK1 — PORTC bit 6; USART1 async transmit; USART1 clock |
| Chân 18 | RC7/RX1/DT1 — PORTC bit 7; USART1 async receive; USART1 data |
| Chân 19 | VSS — Ground reference |
| Chân 20 | VDD — Positive supply voltage |
| Chân 21 | RB0/AN12/INT0 — PORTB bit 0; analog input 12; external interrupt 0 |
| Chân 22 | RB1/AN10/INT1 — PORTB bit 1; analog input 10; external interrupt 1 |
| Chân 23 | RB2/AN8 — PORTB bit 2; analog input 8 |
| Chân 24 | RB3/AN9/CCP2 — PORTB bit 3; analog input 9; CCP2 capture/compare/PWM |
| Chân 25 | RB4/AN11 — PORTB bit 4; analog input 11 |
| Chân 26 | RB5/AN13 — PORTB bit 5; analog input 13 |
| Chân 27 | RB6/PGC — PORTB bit 6; ICSP clock; interrupt-on-change |
| Chân 28 | RB7/PGD — PORTB bit 7; ICSP data; interrupt-on-change |
Ứng dụng tiêu biểu
PIC18F23K20T-I/SS phù hợp cho 7 Áp dụngs: Battery-Powered Sensor Node, Industrial Sensor Conditioning, Consumer Appliance Control, Automotive Body and Lighting Modules, HVAC Thermostat Controller, Small Motor Control / Fan Driver, USB-to-UART Bridge Dongle.
Battery-Powered Sensor Node
The PIC18F23K20T-I/SS suits battery-powered wireless sensor nodes thanks to its nanoWatt XLP™ sleep current in the tens of nA range with RAM retention, 1.8 V-3.6 V VDD range, and 25 wake-capable I/O pins. The 10-bit ADC with 14 input channels and 1.2 V fixed voltage reference enable ratiometric sensor measurements that track battery voltage over discharge. A typical node sleeps at 50 nA, wakes every 60 seconds for a 4 ms ADC + transmit cycle, and runs 5-10 years on a single CR2032 cell - making the part a strong fit for environmental monitoring, leak detection, and smart-metering endpoints where energy budgets dominate the BOM.
Được đề xuất
Industrial Sensor Conditioning
In industrial signal-conditioning front ends, the PIC18F23K20T-I/SS pairs its 10-bit/14-channel ADC with two rail-to-rail comparators and a 1.2 V fixed voltage reference to deliver accurate threshold detection for bridge sensors, RTDs, and 4-20 mA loops. The 64 MHz / 16 MIPS core runs PID loops and filter math in real time without an external DSP, while the SSOP-28 footprint allows placement alongside high-density analog layouts. Industrial designers value the -40 °C to +85 °C industrial temperature grade and the wide 1.8 V-5.5 V supply tolerance that tolerates 24 V loop-powered post-regulation, simplifying sensor-transmitter designs that must survive harsh factory environments.
Được đề xuất
Consumer Appliance Control
For white goods and small consumer appliances, the PIC18F23K20T-I/SS offers the right mix of analog integration and digital control. Its 25 I/O pins directly drive triac interfaces, relay coils, seven-segment displays, and keypads without external logic, while the 14-channel ADC reads thermistor temperatures, water-level probes, and motor current shunts. The 16 MIPS throughput is sufficient for sensor-fused control loops in washing machines, microwave ovens, and induction cooktops. The 256-byte EEPROM retains user settings and fault logs across power cycles, and the SSOP-28 package fits the compact mainboards typical of small appliances.
Được đề xuất
Automotive Body and Lighting Modules
The PIC18F23K20-E/SS extended-grade variant (drop-in with this part) targets automotive body controllers, interior lighting, and seat-control modules operating at -40 °C to +125 °C. The 64 MHz core supports LIN protocol stacks and PWM dimming for LED arrays with hardware timers, while the two analog comparators enable current-sense protection on H-bridge drivers. The 256-byte EEPROM stores fault codes and trim values across vehicle life, and the SSOP-28 footprint simplifies integration into the tight spaces behind dashboards. For body-control modules the nanoWatt XLP sleep current supports key-off quiescent budgets demanded by automakers.
Được đề xuất
HVAC Thermostat Controller
In HVAC and building-automation thermostats, the PIC18F23K20T-I/SS provides 10-bit ADC for temperature/humidity sensors, hardware PWM for triac-fired heater/cooler loads, and 25 I/O pins for keypad scanning, LCD control, and relay drivers. The 64 MHz / 16 MIPS core runs proportional-control loops with sub-second response, while the 256-byte EEPROM stores setpoints and weekly schedules without backup battery. The 1.8 V-3.6 V VDD range supports 24VAC-wallet post-regulation, and the wide -40 °C to +85 °C temperature range covers basement, attic, and rooftop installations.
Được đề xuất
Small Motor Control / Fan Driver
The PIC18F23K20T-I/SS delivers deterministic PWM and input-capture channels that drive BLDC, brushed DC, and stepper motors in compact fans, pumps, and small appliances. Its 16 MIPS core runs sensorless back-EMF or Hall-sensor commutation algorithms in real time, while the dual rail-to-rail comparators detect zero-cross events for back-EMF commutation without external op-amps. The 10-bit ADC monitors motor current through a sense resistor for stall and over-current protection, and the SSOP-28 package fits inline motor housings where space is constrained.
Được đề xuất
USB-to-UART Bridge Dongle
Using on-chip USB 2.0 full-speed with the internal transceiver (not all K20 SKUs include USB - check datasheet), the PIC18F23K20T-I/SS implements a compact USB-to-UART bridge for firmware updates, debugging, and field-service dongles. The 64 MHz core handles USB framing and UART baud-rate generation without an external crystal when the internal oscillator is used, and the 8 KB flash holds CDC-class firmware with margin. The 25 I/O pins provide flexibility for status LEDs and RTS/CTS handshake lines, while the 256-byte EEPROM stores VID/PID/serial strings that can be customized per OEM.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18F23K20T-I/SS — 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 | PIC18F23K20-I/SS | PIC18F23K20T-I/SO | PIC18F23K20T-I/MV | PIC18F23K20-E/SS | PIC18F24K20-I/SS | PIC18F25K20-I/SS |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SSOP (5.30 mm body) | 28-SSOP - same | 28-SOIC (7.50 mm) - different body, same footprint pad spacing | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same |
| Program Flash | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB | 16 KB (+100%) | 32 KB (+300%) |
| SRAM | 512 B | 512 B | 512 B | 512 B | 512 B | 768 B (+50%) | 1536 B (+200%) |
| EEPROM | 256 B | 256 B | 256 B | 256 B | 256 B | 256 B | 256 B |
| Max CPU Speed | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS |
| Operating Temperature | -40 °C to +85 °C (Industrial) | -40 °C to +85 °C (Industrial) | -40 °C to +85 °C (Industrial) | -40 °C to +85 °C (Industrial) | -40 °C to +125 °C (Extended) | -40 °C to +85 °C (Industrial) | -40 °C to +85 °C (Industrial) |
| I/O Pins | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
| ADC | 10-bit, 14 channels | 10-bit, 14 channels | 10-bit, 14 channels | 10-bit, 14 channels | 10-bit, 14 channels | 10-bit, 14 channels | 10-bit, 14 channels |
| Unit Price @ 1k (USD) | 2.22 | 2.22 | 2.30 | 2.40 | 2.55 | 2.85 | 3.10 |
Bảo phân biệt quan trọng
- Tape-and-reel packaging ready for high-volume SMT assembly (vsPIC18F23K20-I/SS)
- Industrial -40 °C to +85 °C temperature grade (vsPIC18F23K20-E/SS)
- nanoWatt XLP™ ultra-low sleep current (vsPIC18F25K20-I/SS)
- 5.30 mm SSOP body for compact PCB layouts (vsPIC18F23K20T-I/SO)
Ghi chú thiết kế
Place a 100 nF decoupling capacitor as close as possible to each VDD pin (pins 8 and 20 on the 28-SSOP), with a 10 µF bulk capacitor on the main VDD rail. The PIC18F23K20T-I/SS draws peak transient currents during flash programming and ADC acquisition; poor decoupling causes code failures and noisy ADC readings. For battery designs, the nanoWatt XLP sleep current is typically tens of nA only when all peripherals are gated off - leaving the ADC or comparators enabled raises sleep current significantly. Validate sleep current on the actual PCB layout before committing to battery-life calculations.
Keep the analog AVCC/AVSS rail traces short and isolated from digital switching signals; if AVCC/AVSS pins are not provided separately on the chosen package, use a ferrite bead or 10 Ω resistor between VDD and the analog supply pin, with dedicated decoupling. Route the MCLR line away from PWM outputs and high-current switching traces to avoid spurious resets during noise events. Place the ICSP connector (PGD/PGC) at the board edge for production programming access; add test points even on production boards to enable field recovery with PICkit tools.
Always configure the CONFIG bits (fuses) explicitly in code or in the MPLAB X configuration settings - the PIC18F23K20T-I/SS defaults to an undefined oscillator mode at first power-up, which can appear as a 'dead' MCU. Enable brown-out reset (BOR) at the lowest viable threshold for your application to prevent code corruption during supply droops. When migrating from a PIC18F23K20-I/SS to the T-I/SS reel version, verify the reel orientation matches your pick-and-place feeder. The Watchdog Timer (WDT) should be enabled for safety-critical applications and serviced within the configured window.
Allocate the SSOP-28 footprint with thermal relief on all pads to ease hand-rework and inspection, especially for prototype builds. Maintain at least 0.5 mm clearance between the MCU and adjacent tall components to allow probe-tip access during debug. Place the external crystal (if used) within 5 mm of the OSC1/OSC2 pins, with the crystal case grounded to reduce EMI. For ADC accuracy above 8 ENOB, route analog inputs away from digital switching lines and add a ground guard ring around sensitive analog traces.
Thông tin tuân thủ
RoHS compliant and Pb-Free per Microchip product page and DigiKey listing. AEC-Q100 qualification not applicable for the -I/SS industrial grade; choose PIC18F23K20-E/SS for extended-temperature automotive usage. Halogen-free status not explicitly listed in the verified data.
