PIC16LF818T-I/SO - 8-bit MCU 1.75KB Flash 10MHz SOIC-18 | Microchip
MPN: PIC16LF818T-I/SO ✓ Hoạt độngPIC16LF818T-I/SO Tóm tắt
Background — what is a PIC16 microcontroller? An 8-bit microcontroller (MCU) is a single-chip computer integrating a CPU core, non-volatile program memory (Flash), working RAM, EEPROM data memory, digital I/O, and on-chip peripherals such as timers, ADC, and serial interfaces. The PIC16 family uses Microchip's RISC architecture with only 35 single-word instructions, executing most instructions in 200 ns at 20 MHz clock, and is widely used in cost-sensitive embedded control where deterministic behavior and low power matter more than raw compute throughput. The PIC16LF818 specifically sits in the PIC16 mid-range family offering 14-bit instruction words, ADC, and enhanced peripherals.
Key features include 1.75 KB Flash, 128 B SRAM, 128 B EEPROM, 10-bit multi-channel ADC, two PWM modules, a USART, an SSP supporting SPI and I2C (master/slave), two 8-bit timers plus one 16-bit timer, internal 8 MHz oscillator, and in-circuit serial programming (ICSP). The 16-pin I/O budget in the 18-SOIC package provides ample connectivity for sensors, switches, LEDs, and serial peripherals.
The PIC16LF818 employs a Harvard-architecture RISC core with separate program and data buses, single-cycle hardware multiply via the 8x8 hardware multiplier, and an internal PLL-free clock tree selectable between INTOSC and external crystal/RC. Its nanoWatt technology provides multiple idle/sleep modes with wake-on-interrupt, and the LF process delivers low quiescent current for battery-powered IoT endpoints.
Typical applications include battery-powered sensor nodes, low-end consumer electronics, simple motor-control BLDC/PWM drivers, USB-to-UART bridge front-ends, LED controllers, and industrial sensor interfaces. The combination of Flash, EEPROM, ADC and serial peripherals allows compact single-chip implementations.
When designing with this device, ensure that the application firmware budget fits within 1.75 KB Flash and 128 B SRAM — code and stack overflow will halt the part. Use the ICSP interface for field updates; reserve pins RA0/RA1 or RB6/RB7 to avoid contention with the in-circuit programmer during code development. Confirm the supply rail stays within 1.8-3.6 V and that decoupling capacitors are placed within 5 mm of VDD/SS pins.
Bộ thay thế dễ dàng lắp đặt cho PIC16LF818T-I/SO — 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 PIC16LF818T-I/SO (cùng hình factor và footprint) — khác nhau ở Package, ADC, Core Architecture, I/O Pins, Operating Temperature.
PIC16LF818-I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LF818T-I/SOTSL
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16LF818T-E/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LF818-I/SOTSL
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Xem tài liệu →PIC16LF818T-I/SO Tỷ lệ tối đa & tính chất điện
| Core Architecture | 8-bit PIC16 RISC (35 instructions) |
| Program Memory (Flash) | 1.75 KB (1K x 14) |
| Data SRAM | 128 B |
| Data EEPROM | 128 B |
| Tần số xung maksimum | 20 MHz (10 MIPS) |
| Supply Voltage (VDD) | 1.8 V to 3.6 V |
| I/O Pins | 16 (in 18-SOIC package) |
| ADC | 10-bit, 5 channels (per datasheet) |
| PWM Channels | 2 (CCP module) |
| Timers | 2 x 8-bit + 1 x 16-bit |
| Serial Interfaces | USART, SSP (SPI / I2C master-slave) |
| Internal Oscillator | 8 MHz (31 kHz low-power option) |
| Nhiệt độ hoạt động | -40C to +85C (industrial) |
| Hộp | 18-SOIC (SO, 7.50 mm body) |
| Kiểu lắp đặt | Surface Mount |
| Cấp MSL | 1 |
| Trạng thái RoHS | Compliant |
| ICSP | In-Circuit Serial Programming supported |
| Instruction Execution | 200 ns at 20 MHz |
Cấu hình chân PIC16LF818T-I/SO
| Chân 1 | RA2/AN2/CVREF/VREF- — PORTA bit 2 / analog channel 2 / CVREF output / VREF- |
| Chân 2 | RA3/AN3/CMP1/VREF+ — PORTA bit 3 / analog channel 3 / comparator 1 output / VREF+ |
| Chân 3 | RA4/AN4/T0CKI — PORTA bit 4 / analog channel 4 / Timer0 clock input |
| Chân 4 | RA5/AN5/SS/HLVDIN — PORTA bit 5 / analog channel 5 / SPI slave select / HLVD input |
| Chân 5 | VSS — Ground reference |
| Chân 6 | RA0/AN0/ULPWU — PORTA bit 0 / analog channel 0 / ultra-low-power wake-up |
| Chân 7 | RA1/AN1 — PORTA bit 1 / analog channel 1 |
| Chân 8 | RA6/OSC2/CLKO — PORTA bit 6 / crystal oscillator output / clock output |
| Chân 9 | RA7/OSC1/CLKI — PORTA bit 7 / crystal oscillator input / clock input |
| Chân 10 | Vdd — Positive supply 1.8V-3.6V |
| Chân 11 | RB0/INT/AN12 — PORTB bit 0 / external interrupt / analog channel 12 |
| Chân 12 | RB1/AN10 — PORTB bit 1 / analog channel 10 |
| Chân 13 | RB2/AN8 — PORTB bit 2 / analog channel 8 |
| Chân 14 | RB3/AN11/CCP1 — PORTB bit 3 / analog channel 11 / CCP1 PWM output |
| Chân 15 | RB4/AN9 — PORTB bit 4 / analog channel 9 |
| Chân 16 | RB5/AN13/CCP2 — PORTB bit 5 / analog channel 13 / CCP2 PWM output |
| Chân 17 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Chân 18 | RB7/PGD — PORTB bit 7 / ICSP data |
Ứng dụng tiêu biểu
PIC16LF818T-I/SO phù hợp cho 7 Áp dụngs: Battery-Powered Sensor Node, LED Lighting Controller, USB-to-UART Bridge Front-End, Low-End Industrial Sensor Interface, Consumer Remote Control, DC Motor PWM Controller, Hobby/STEM Educational Board.
Battery-Powered Sensor Node
The PIC16LF818T-I/SO fits battery-powered wireless sensor nodes because its 1.8-3.6 V supply range matches 2-cell alkaline or single Li-ion chemistry directly, while the LF process provides nanoWatt sleep modes drawing only microamps. Its 10-bit ADC with 5 channels supports temperature, light, or motion sensor inputs sampled at low duty-cycle; the 1.75 KB Flash fits compact C drivers for BLE/SPI peripherals like the RN4870, and the 16 I/O pins let one chip multiplex sensors, LEDs, and a UART bridge. Compared to PIC16F818, the LF variant gives longer battery life in duty-cycled wake-up designs.
Được đề xuất
LED Lighting Controller
Use the PIC16LF818T-I/SO as a low-cost RGBW LED controller. Its 2 PWM channels (CCP module) drive color and intensity; an external WS2812 or APA102 LED driver can be controlled via bit-banged SPI/I2C from PORTB. The 1.75 KB Flash holds color-ramp tables and DMX-style command parsing; the 16-bit timer can debounce physical buttons without external glue. The 1.8-3.6 V supply lets the part run directly from a 3.3 V buck regulator shared with the LED string.
Được đề xuất
USB-to-UART Bridge Front-End
The PIC16LF818T-I/SO is well suited as a low-cost USB-to-UART bridge replacement for older designs, pairing the internal USART with a USB-CDC bridge IC like the MCP2200. The 1.75 KB Flash and 128 B SRAM hold the small protocol handler, while 16 I/O expose general-purpose GPIOs for legacy RS-232 peripherals. Industrial temperature -40C to +85C is essential for instrumentation front-ends, and the 18-SOIC footprint simplifies hand-prototyping on breakout boards.
Được đề xuất
Low-End Industrial Sensor Interface
Industrial sensor signal conditioning often needs a small MCU for calibration, linearization, and protocol conversion — the PIC16LF818T-I/SO does this with its 10-bit ADC (5 channels), 16-bit timer for PWM output, and USART for RS-232/RS-485 comms via external transceiver. The 1.8-3.6 V range supports 3.3 V industrial backplanes, while the industrial temperature grade handles factory-floor ambient. Programming via ICSP enables field firmware updates without removing the chip from the PCB.
Được đề xuất
Consumer Remote Control
Build a TV/set-top remote control using the PIC16LF818T-I/SO. Its 16 I/O pins scan 4x4 matrix keypads plus drive IR LEDs through PWM; the internal 8 MHz oscillator eliminates an external crystal, reducing BOM cost. The LF process variant's low quiescent current lets a coin-cell battery last multiple years in standby; sleep mode draws microamps and wakes on keypress interrupt. The 1.75 KB Flash fits NEC/SIRC RC-5/RC-6 IR protocol encoders with margin.
Được đề xuất
DC Motor PWM Controller
Drive small DC brushed motors from the PIC16LF818T-I/SO using its CCP PWM module and a low-side MOSFET driver. The 10-bit ADC reads back current or RPM via a tachogenerator; the 16-bit timer keeps speed regulation loop tight. The 18-SOIC package handles modest power dissipation and the 1.8-3.6 V supply can be derived from a small Li-ion cell with a 3.3 V LDO for hobby robotics or low-power toys.
Được đề xuất
Hobby/STEM Educational Board
The PIC16LF818T-I/SO is a popular training and teaching platform because of its small Flash footprint (1.75 KB) and easy-to-learn 35-instruction RISC set. With 16 I/O, 10-bit ADC, PWM, I2C, SPI, and USART, students can interface buttons, LEDs, sensors, and serial peripherals on a single chip. The 18-SOIC breadboard-friendly package fits onto through-hole-to-SMD adapter boards used in PICkit programmer labs; ICSP allows in-circuit reprogramming during classes.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16LF818T-I/SO — 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 | PIC16LF818-I/SO | PIC16LF818T-E/SO | PIC16LF818T-I/SOTSL |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 18-SOIC (SO) | 18-SOIC (SO) - same | 18-SOIC (SO) - same | 18-SOIC (SO) - same |
| Program Flash | 1.75 KB | 1.75 KB | 1.75 KB | 1.75 KB |
| SRAM / EEPROM | 128 B / 128 B | 128 B / 128 B | 128 B / 128 B | 128 B / 128 B |
| Supply Voltage | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V |
| Operating Temperature | -40C to +85C (I) | -40C to +85C (I) | -40C to +125C (E) | -40C to +85C (I) |
| Max Clock | 20 MHz (10 MIPS) | 20 MHz (10 MIPS) | 20 MHz (10 MIPS) | 20 MHz (10 MIPS) |
| I/O Pins | 16 | 16 | 16 | 16 |
| Packaging Variant | Tape and Reel (T) | Tube | Tape and Reel (E-grade) | Tape and Reel reverse orientation |
| RoHS | Compliant | Compliant | Compliant | Compliant |
Bảo phân biệt quan trọng
- Industrial temperature grade at the lowest price tier (vsPIC16LF818T-E/SO)
- 1.8 V minimum supply for true single-cell Li-ion operation (vsPIC16F818-I/SO (2.0-5.5 V))
- Tape-and-reel packaging optimized for SMT assembly (vsPIC16LF818-I/SO (tube))
Ghi chú thiết kế
The PIC16LF818T-I/SO requires a clean 1.8-3.6 V supply on VDD (pin 10). Place a 100 nF decoupling ceramic within 5 mm of VDD and a 10 uF bulk tantalum/ceramic at the regulator output. The LF process benefits from nanoWatt sleep modes; idle current drops to microampere levels but only when the watchdog and ADC are disabled. Brown-Out Reset (BOR) should be enabled in CONFIG to prevent Flash corruption during battery dips below 1.8 V.
Use the standard IPC-7351 SOIC-18 land pattern (1.27 mm pitch, 0.41 mm pad width). Keep traces under PORTB and PORTA short to reduce EMI into analog channels AN0-AN5. Reserve pins RB6/RB7 for ICSP programming - if these pins are also used as GPIO, ensure no contention with external pull-ups that exceed 10 kohm during programming. Place a ground plane under the SOIC for thermal dissipation; the 18-SOIC has no exposed pad.
Three common PIC16LF818 pitfalls: (1) Exceeding 3.6 V on VDD stresses Flash - always verify rail at cold start with worst-case battery voltage; (2) Stack and code budget - 1.75 KB Flash plus hardware stack depth of 8 means recursive ISR calls can crash the part, so keep ISRs shallow; (3) ADC input impedance on AN0-AN5 needs source impedance below 2.5 kohm for full 10-bit accuracy at 20 MHz conversion clock; use a buffer op-amp when sampling high-impedance sensors.
When using the PIC16LF818T-I/SO as a PWM source for LED drivers, route the PWM trace (typically RB3/CCP1 or RB5/CCP2) away from analog inputs AN0-AN5 to minimize capacitive crosstalk. The PWM frequency is set by Timer2 and PR2; typical ranges 1-20 kHz avoid audible noise in motor/LED applications. Add a series ferrite bead if the PWM trace exceeds 25 mm.
Thông tin tuân thủ
RoHS and REACH compliance per Microchip product environmental compliance documentation. Lead-free reflow profile JEDEC J-STD-020. Halogen-free status not explicitly stated in retrieved data, marked as unknown. AEC-Q100 not applicable for non-automotive MCU part; automotive users should consult Microchip automotive-grade catalog.
