PIC18LF1320T-I/SO - 8KB Flash 8-bit MCU, 18-SOIC | Microchip
MPN: PIC18LF1320T-I/SO ✓ Hoạt độngPIC18LF1320T-I/SO Tóm tắt
A PIC18 microcontroller is an 8-bit RISC MCU belonging to the PIC18 family of microcontrollers - one of Microchip's enhanced 8-bit product lines. PIC18 MCUs occupy the performance tier above base-level PIC16 parts, sit alongside PIC24/dsPIC as the upgrade path, and are widely used for cost-sensitive embedded control with abundant peripheral integration.
Key features include seven 10-bit A/D input channels, a 16-bit timer/counter, two analog comparators, a USART module supporting RS-232/RS-485, and an internal oscillator. The device supports 100,000 typical Flash erase/write cycles and >40-year data retention, validated against industrial and consumer reliability profiles.
The LF prefix denotes the low-voltage variant of the PIC18F1320, optimized for 2.0V to 5.5V operation versus the F variant's 2.0V to 5.5V standard. Internally, an enhanced Harvard architecture with separate program and data buses, 31-level hardware stack, and instruction-pipeline allow single-cycle execution for most opcodes - giving 10 MIPS throughput at 40 MHz.
Typical applications include low-power sensor nodes, USB/RS-485 bridge firmware, sensor signal conditioning, and consumer white goods. It is also deployed in battery-powered instrumentation where nanoWatt sleep modes extend operational life. In a temperature logger, the LF's 100 nA typical standby current plus 10-bit ADC let a coin-cell operate the device for years.
When designing with this device, ensure in-circuit serial programming (ICSP) connections remain accessible; the PGD/PGC pins double as RB7/RB6 and must not be permanently pulled to ground or supply. Decoupling should follow Microchip's analog/digital separation guidelines when the A/D converter is active.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, with cross-references verified against the Microchip parametric database.
Bộ thay thế dễ dàng lắp đặt cho PIC18LF1320T-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 PIC18LF1320T-I/SO (cùng hình factor và footprint) — khác nhau ở Package, Core Architecture, Operating Temperature, Program Memory (Flash), ADC.
PIC18LF1320-I/SO
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F1320T-I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F1320T-I/SS
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18LF1320-I/ML
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F1320-I/P
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18LF1320T-I/SO Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC18 enhanced 8-bit RISC |
| Program Memory Size | 8 KB (4K x 16) Flash |
| RAM | 256 bytes |
| EEPROM | 256 bytes |
| CPU Speed (Max) | 40 MHz (10 MIPS) |
| Điện áp cung cấp | 2.0 V to 5.5 V |
| I/O Pins | 16 |
| A/D Converter | 10-bit, 7 channels |
| Analog Comparators | 2 |
| Timers (16-bit) | 1 |
| Timers (8-bit) | 2 |
| Communication | USART (RS-232/RS-485) |
| Nhiệt độ hoạt động | -40 C to +85 C (Industrial) |
| Hộp | 18-SOIC (SO) |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
| Flash Endurance | 100,000 erase/write cycles typical |
| Data Retention | >40 years |
| Internal Oscillator | Yes (8 MHz, software tunable) |
| nanoWatt Power Management | Yes |
Cấu hình chân PIC18LF1320T-I/SO
| Chân 1 | RA2/AN2 — Digital I/O / Analog input channel 2 |
| Chân 2 | RA3/AN3/VREF+ — Digital I/O / Analog input channel 3 / A/D reference positive |
| Chân 3 | RA4/AN4 — Digital I/O / Analog input channel 4 |
| Chân 4 | RA5/AN5 — Digital I/O / Analog input channel 5 |
| Chân 5 | VSS — Ground reference |
| Chân 6 | OSC1/RA7 — Oscillator input / Digital I/O |
| Chân 7 | OSC2/RA6 — Oscillator output / Digital I/O |
| Chân 8 | RC0 — Digital I/O (PORTC bit 0) |
| Chân 9 | RC1 — Digital I/O (PORTC bit 1) |
| Chân 10 | RC2 — Digital I/O (PORTC bit 2) |
| Chân 11 | RC3 — Digital I/O (PORTC bit 3) |
| Chân 12 | RC4 — Digital I/O (PORTC bit 4) |
| Chân 13 | RC5 — Digital I/O (PORTC bit 5) |
| Chân 14 | RC6 — Digital I/O (PORTC bit 6) |
| Chân 15 | RC7 — Digital I/O (PORTC bit 7) |
| Chân 16 | VSS — Ground reference |
| Chân 17 | VDD — Positive supply voltage (2.0V to 5.5V) |
| Chân 18 | MCLR/VPP — Master Clear reset (active low) / programming voltage input |
Ứng dụng tiêu biểu
PIC18LF1320T-I/SO phù hợp cho 6 Áp dụngs: Battery-Powered Sensor Node, RS-485 Sensor Bridge / Industrial Field Node, USB-to-Serial Bridge Firmware Host, Consumer White Goods User Interface, Automotive Interior Accessory Controller (Non-Safety), IoT Edge Node with nanoWatt Sleep.
Battery-Powered Sensor Node
The PIC18LF1320T-I/SO is well-suited to wireless sensor nodes drawing from coin-cell or 2x AA batteries, where its 2.0V to 5.5V supply and nanoWatt standby currents of 100 nA typical extend operational life to multi-year horizons. The 7-channel 10-bit A/D converter handles thermistor, photocell, and battery-monitor inputs without external analog front-end, and the 8 KB Flash accommodates sensor-fusion firmware plus 100,000-cycle Flash endurance supports field-updatable calibration. Compared with a discrete op-amp plus ADC design, the integrated MCU shrinks the BOM and enables sleep modes keyed on internal comparators. A typical deployment pairs the device with an SPI-connected sensor and a low-power RF module; the MCU spends most of its life in sleep, waking every few seconds to sample and transmit.
Được đề xuất
RS-485 Sensor Bridge / Industrial Field Node
Industrial RS-485 networks benefit from the PIC18LF1320T-I/SO's on-chip USART with hardware addressing support and 16 I/O pins for digital sensor aggregation. The 10 MIPS core handles Modbus RTU framing, CRC-16 calculation, and 100 Hz polling loops in real time without software bottlenecks. The -40 C to +85 C industrial temperature grade allows deployment in factory-floor enclosures, while 256 bytes of EEPROM stores node address and calibration constants non-volatilely. Unlike pure-ASIC Modbus solutions, the PIC18 firmware adapts to evolving protocol variants and customer-specific registers without hardware respin. A typical circuit places the MCU between a MAX485 transceiver and a string of digital sensors, with the A/D converter available for analog sensor backup.
Được đề xuất
USB-to-Serial Bridge Firmware Host
The PIC18LF1320T-I/SO serves as the protocol-translation brain in USB-to-UART bridges, where its USART pairs with an external USB-to-UART IC (MCP2200 or FT232) and its 16 I/O pins handle flow-control signals and status LEDs. The 8 KB Flash accommodates USB CDC class driver firmware, while 256 bytes RAM buffers small packet payloads with flow-control back-pressure. Operating from 3.3V or 5V supply, the device integrates easily into USB-powered dongles, and its low-power standby mode keeps idle current under 100 mA unit-cost when the USB host is suspended. Compared with native-USB MCUs, the external-transceiver architecture reduces BOM cost by 30-40% while supporting industrial isolation stacks.
Được đề xuất
Consumer White Goods User Interface
White-goods HMIs - washing machine panels, microwave keypads, dishwasher displays - deploy the PIC18LF1320T-I/SO to scan key matrices, drive LED indicators, and run 7-segment or LCD character displays. The 16 I/O pins support 4x4 keypads plus 8-digit displays without external logic, and the 7-channel 10-bit A/D reads temperature sensors and potentiometers for user input. The -40 C to +85 C operating range supports both indoor appliances and outdoor-rated enclosures, while nanoWatt sleep modes reduce standby power below 50 mA unit-cost for energy-star compliance. The PIC18 instruction set is well-documented for non-realtime HMI firmware, and the 8 KB Flash accommodates state-machine plus diagnostics.
Được đề xuất
Automotive Interior Accessory Controller (Non-Safety)
Although not AEC-Q100 qualified, the PIC18LF1320T-I/SO appears in non-safety automotive interior accessories such as ambient lighting controllers, seat-position memory modules, and HVAC trim controls, where its 2.0V to 5.5V supply tolerance supports direct 12V battery rail operation through local regulation. The USART interfaces to body-control modules over LIN or single-wire UART, and the 10-bit A/D reads potentiometers and thermistors for trim position sensing. The -40 C to +85 C industrial temperature grade covers cabin environments; under-hood designs require AEC-Q100 parts like PIC18F25K80. The 18-SOIC package is small enough to fit inside seat-side connector housings.
Được đề xuất
IoT Edge Node with nanoWatt Sleep
IoT edge devices at the boundary of Wi-Fi or LoRa networks run the PIC18LF1320T-I/SO as a power-managed wake-up controller, where its nanoWatt Technology reduces sleep current below 100 nA typical - small enough to run a CR2032 coin cell for multi-year horizons. The internal 8 MHz oscillator eliminates external crystal cost and BOM complexity, and the 10-bit A/D monitors battery voltage for low-battery warning transmission. The 16 I/O pins connect to interrupt-capable sensors that wake the MCU from sleep via analog-comparator edge detection. Compared with 32-bit Cortex-M0+ alternatives, the PIC18 cut platform lists at 30-50% lower unit cost and consumes a fraction of the standby current.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18LF1320T-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 | PIC18LF1320-I/SO | PIC18F1320T-I/SO | PIC18F1320T-I/SS | PIC18LF1320-I/ML | PIC18F1320-I/P |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 18-SOIC | 18-SOIC (tube) | 18-SOIC (tape & reel) | 20-SSOP | 28-QFN | 18-PDIP |
| Program Memory | 8 KB Flash | 8 KB Flash | 8 KB Flash | 8 KB Flash | 8 KB Flash | 8 KB Flash |
| RAM | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes |
| Max CPU Speed | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) |
| Supply Voltage | 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 |
| I/O Pins | 16 | 16 | 16 | 16 | 16 | 16 |
| A/D Converter | 10-bit, 7 channels | 10-bit, 7 channels | 10-bit, 7 channels | 10-bit, 7 channels | 10-bit, 7 channels | 10-bit, 7 channels |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| Unit Price (qty 1, USD) | 4.10 | 3.95 | 3.85 | 3.95 | 4.30 | 4.20 |
Bảo phân biệt quan trọng
- Tape-and-reel packaging for high-volume automated assembly (vsPIC18LF1320-I/SO (tube version))
- LF process revision optimized for low-voltage and battery applications (vsPIC18F1320T-I/SO (standard F variant))
- 18-SOIC small-outline footprint vs. larger 28- or 40-pin PIC18 variants (vsPIC18LF2420-I/SO (28-pin SOIC))
Ghi chú thiết kế
The PIC18LF1320T-I/SO's nanoWatt Technology provides six software-controlled power-managed modes. Estimated: at 3.0V VDD, the sleep current is 100 nA typical with watchdog disabled, allowing CR2032 coin-cell operation for 5-7 years at 1 sample-per-minute duty cycle. To achieve these numbers, disable all peripherals before entering sleep via the peripheral-disable registers, set all I/O pins to defined logic levels (not floating), and configure the watchdog timer only when periodic wake-up is needed. The on-chip voltage regulator maintains RAM contents through sleep, so no external backup battery is required.
Place a 100 nF decoupling capacitor as close as possible to the VDD pin (pin 17), with trace length under 5 mm to suppress switching noise during A/D conversions. Estimated: the A/D converter draws 1.5 mA during a 10-bit conversion, creating a 20 ns current spike that can corrupt reference voltage if decoupling is inadequate. Use a ground plane under the MCU to provide low-inductance return paths for high-frequency switching noise. Keep analog input traces (RA0-RA5) short and routed away from digital switching lines (RC0-RC7) to minimize crosstalk into the A/D converter.
Configuration bits must be set correctly before code execution - failure to configure the oscillator mode (HS vs. INT vs. RC) and watchdog timer (WDT) can cause the device to lock up or behave erratically. Common pitfall: leaving MCLR (pin 18) floating - it must be pulled to VDD through a 10 kohm resistor for normal operation, or driven low for reset. Another pitfall: in-circuit serial programming (ICSP) requires access to RB6/PGC and RB7/PGD pins - if these are permanently pulled to ground or supply, ICSP becomes impossible, requiring high-voltage parallel programming instead.
When using the internal 8 MHz oscillator at high CPU speeds, the system's EMI profile can affect sensitive analog measurements. The PIC18LF1320T-I/SO's clock-out feature (CLKOUT) can route the system clock to an I/O pin for synchronization, but adding a 100 ohm series resistor at the clock output reduces radiated emissions. For A/D converter precision, use the internal A/D converter with a separate analog ground (AGND) connected to digital ground only at one point - the VSS pin. This star-ground topology prevents digital return currents from injecting noise into the analog reference.
Thông tin tuân thủ
RoHS compliant per Microchip product page and DigiKey listing. Industrial temperature grade -40 C to +85 C. Not AEC-Q100 qualified - not suitable for automotive safety applications; use PIC18F25K80 or PIC18F46K80 for AEC-Q100 needs.