PIC18LF2320T-I/SO - 8-bit 40MHz 8KB Flash MCU 28-SOIC
MPN: PIC18LF2320T-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.85 | $5.85 |
| 10 | $5.27 | $52.70 |
| 100 | $4.68 | $468.00 |
| 500 | $4.22 | $2,110.00 |
| 1,000 | $3.75 | $3,750.00 |
PIC18LF2320T-I/SO Overview
An 8-bit PIC microcontroller is a Harvard-architecture device that executes a reduced instruction set (RISC) optimized for embedded control. In the broader taxonomy, the PIC18 family sits above PIC10/12/16 baseline parts and below 16-bit PIC24/dsPIC devices. The PIC18LF2320 integrates nanoWatt technology for low-power sleep modes, 10-bit ADC, multiple timers, and enhanced PWM peripherals, making it well-suited to mixed-signal control tasks.
Key features of the PIC18LF2320 include 25 I/O pins, one 8-bit and three 16-bit timers/counters, a 10-bit multi-channel ADC, USART, MSSP (SPI/I2C), and nanoWatt power management with multiple idle and sleep modes. The 28-SOIC package has a 7.50 mm body width, supporting both hand-soldering and standard reflow profiles while keeping the part footprint compatible with PIC16 and PIC18 28-pin SPDIP designs via adapter PCB.
The device's enhanced flash supports self-programming and ICSP (In-Circuit Serial Programming), enabling firmware upgrades in the field. Interrupt latency is tightly bounded at four instruction cycles, and the 16-bit-wide instruction path accelerates C-compiled code. With 32 KB addressable program space, the architecture allows upward migration to PIC18F2520/4520 families with code compatibility for scalable product lines.
Typical applications include industrial sensor conditioning, low-power remote control, battery chargers, small appliances, and consumer white goods. The wide 2.0 V-5.5 V supply window also supports portable instrumentation where two AA cells must operate reliably down to their end-of-life voltage.
When designing with this part, plan for ICSP connections (PGC/PGD/MCLR/VSS/VDD) on dedicated test pads so production firmware can be loaded without disassembling the enclosure. The internal 8 MHz oscillator is factory-trimmed to within ±1%, but designs targeting accurate timing via asynchronous serial should still use an external crystal on OSC1/OSC2.
This page synthesizes distributor pricing, drop-in compatible same-package alternatives, and practical design notes that the manufacturer datasheet does not present in one place.
Drop-in alternatives for PIC18LF2320T-I/SO — 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 PIC18LF2320T-I/SO (same form factor and footprint) — differing in Package, Timers, ADC, Core Architecture, Communication.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18LF2320-I/SO
✅ Drop-In✓ In Stock
$3.31 / Unit
View Datasheet →PIC18F2320-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F2320T-I/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.1 / Unit
View Datasheet →PIC18LF2321T-I/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.18 / Unit
View Datasheet →PIC18LF2221-I/SO
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC18LF2320T-I/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC18 (8-bit enhanced RISC, Harvard) |
| Program Memory (Flash) | 8 KB (4K x 16 words) |
| Data RAM | 512 bytes |
| EEPROM | 256 bytes |
| Maximum CPU Frequency | 40 MHz |
| Supply Voltage (Vdd) | 2.0 V to 5.5 V |
| I/O Pins | 25 |
| ADC | 10-bit, 10 channels |
| Timers | 1 x 8-bit, 3 x 16-bit |
| Communication | 1 x USART (RS-232/RS-485), 1 x MSSP (SPI/I2C) |
| PWM Channels | Enhanced CCP + PWM, multiple channels |
| Operating Temperature | -40C to +85C (Industrial, "I") |
| Package | 28-SOIC (7.50 mm body width) |
| Mounting Type | Surface Mount |
| Programming | ICSP (In-Circuit Serial Programming) |
| Lead-Free / RoHS | Lead-free, RoHS compliant |
| Low-Power Modes | nanoWatt technology (Sleep, Idle, etc.) |
PIC18LF2320T-I/SO Pin Configuration
| Pin 1 | MCLR/VPP/RE3 — Master Clear (reset) input / programming voltage / digital input only on RE3 |
| Pin 2 | RA0/AN0 — PORTA bit 0 / analog input channel 0 |
| Pin 3 | RA1/AN1 — PORTA bit 1 / analog input channel 1 |
| Pin 4 | RA2/AN2/VREF- — PORTA bit 2 / analog input channel 2 / ADC negative reference |
| Pin 5 | RA3/AN3/VREF+ — PORTA bit 3 / analog input channel 3 / ADC positive reference |
| Pin 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input (open-drain output) |
| Pin 7 | RA5/AN4/SS — PORTA bit 5 / analog input channel 4 / SPI slave select |
| Pin 8 | VSS — Ground reference |
| Pin 9 | OSC1/CLKI/RA7 — Crystal/oscillator input / external clock input / PORTA bit 7 |
| Pin 10 | OSC2/CLKO/RA6 — Crystal/oscillator output / clock output / PORTA bit 6 |
| Pin 11 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| Pin 12 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / Capture/Compare/PWM 2 |
| Pin 13 | RC2/CCP1 — PORTC bit 2 / Capture/Compare/PWM 1 |
| Pin 14 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Pin 15 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Pin 16 | RC5/SDO — PORTC bit 5 / SPI data out |
| Pin 17 | RC6/TX/CK — PORTC bit 6 / USART transmit / USART clock |
| Pin 18 | RC7/RX/DT — PORTC bit 7 / USART receive / USART data |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VDD — Positive supply voltage |
| Pin 21 | RB0/INT0/FLT0 — PORTB bit 0 / external interrupt 0 / PWM fault input |
| Pin 22 | RB1/INT1 — PORTB bit 1 / external interrupt 1 |
| Pin 23 | RB2/INT2 — PORTB bit 2 / external interrupt 2 |
| Pin 24 | RB3/CCP2 — PORTB bit 3 / Capture/Compare/PWM 2 |
| Pin 25 | RB4 — PORTB bit 4 (interrupt-on-change) |
| Pin 26 | RB5 — PORTB bit 5 (interrupt-on-change) |
| Pin 27 | RB6/PGC — PORTB bit 6 / ICSP clock (interrupt-on-change) |
| Pin 28 | RB7/PGD — PORTB bit 7 / ICSP data (interrupt-on-change) |
Typical Applications
PIC18LF2320T-I/SO is suitable for 6 applications: Battery-Powered Sensor Hub, Small Appliance Control Board, Industrial Sensor Conditioning Module, USB-less Consumer Remote Control, Educational / Development Board MCU, Portable Medical Monitoring Accessory.
Battery-Powered Sensor Hub
The PIC18LF2320T-I/SO is well suited to battery-powered sensor hubs that aggregate temperature, humidity, and motion data over multiple I/O pins and stream results through I2C or UART. The 2.0 V-5.5 V supply range accepts two AA cells directly without a boost converter, while the 10-bit ADC and 25 I/O pins handle typical sensor counts. The 40 MHz clock supports polled sampling up to ~1 MSPS aggregate, and nanoWatt Sleep modes reduce quiescent current to microamp levels between sensor reads. Estimated average current at 1 Hz sampling falls below 100 uA with peripherals clock-gated, allowing multi-year battery life on a 2000 mAh pack.
Recommended
Small Appliance Control Board
In small kitchen and household appliances such as coffee makers, blenders, and humidifiers, the PIC18LF2320T-I/SO provides enough Flash for state-machine firmware plus 25 I/O lines for keypad scanning, relay drivers, and triac phase-angle control. The enhanced CCP/PWM block can generate the required 50/60 Hz phase-control waveforms without an external timer IC. The wide 2.0 V-5.5 V supply simplifies direct connection to rectified mains-derived rails. The 28-SOIC footprint also gives designers enough copper to dissipate the small amount of heat from the internal linear regulator under typical 5 V, 20 mA conditions.
Recommended
Industrial Sensor Conditioning Module
The PIC18LF2320T-I/SO fits industrial 4-20 mA loop-powered sensor-conditioning modules that require reliable operation across a wide temperature range (-40 C to +85 C industrial grade). Its 10-bit ADC with 10 input channels can read multiple bridge sensors, RTDs, or thermistors, while the USART drives the HART or RS-485 backhaul. The wide 2.0 V-5.5 V supply accepts regulated loop power and tolerates brown-out conditions. Watchdog timer and brown-out reset built into the silicon reduce field failures due to supply transients common in factory-floor installations.
Recommended
USB-less Consumer Remote Control
Remote-control handsets for TVs, set-top boxes, and industrial HMIs can use the PIC18LF2320T-I/SO as a low-power transmitter controller. The MSSP module drives an IR LED through SPI-mode PWM, while the ADC scans analog buttons via a resistor ladder to minimize GPIO usage. nanoWatt Sleep current in single-digit microamps enables 6-month coin-cell operation. The 28-SOIC package is thin enough for slim remote enclosures and survives standard SMT reflow profiles without thermal damage.
Recommended
Educational / Development Board MCU
University and hobbyist training boards often use the PIC18LF2320T-I/SO because it offers PIC18 instruction-set experience with manageable 8 KB Flash, abundant sample code, and ICSP support. The 28-SOIC footprint is easier for hand-soldering than QFN variants and accepts common SOIC-to-DIP adapters for breadboards. The device is supported by MPLAB X IDE, XC8 compiler, and the free MPLAB Code Configurator, giving students a complete professional-grade toolchain at zero licensing cost.
Recommended
Portable Medical Monitoring Accessory
Wearable patient-monitoring accessories such as pulse-oximeter cable dongles, spirometer interfaces, or activity-tracker sidecars can use the PIC18LF2320T-I/SO as the data-aggregation MCU. The wide 2.0 V-5.5 V supply accepts Li-coin or Li-ion cells directly, while the low Sleep current keeps idle drain below 5 uA. The 10-bit ADC reads photodiode or thermistor sensors, and the USART streams results over Bluetooth via an external HC-05 module. Although the part is not AEC-Q100 qualified, its industrial temperature range and Microchip quality programs suit non-life-critical Class I accessories.
Recommended
Recommended Products Summary
Engineering reference data for PIC18LF2320T-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18LF2320-I/SO | PIC18F2320-I/SO | PIC18F2320T-I/SO | PIC18LF2321T-I/SO | PIC18LF2221-I/SO |
|---|---|---|---|---|---|---|
| Package | 28-SOIC | 28-SOIC (same) | 28-SOIC (same) | 28-SOIC (same) | 28-SOIC (same) | 28-SOIC (same) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Supply Voltage (Vdd) | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V |
| Program Flash | 8 KB | 8 KB | 8 KB | 8 KB | 16 KB | 4 KB |
| RAM | 512 B | 512 B | 512 B | 512 B | 512 B | 512 B |
| Max CPU Frequency | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| I/O Pins | 25 | 25 | 25 | 25 | 25 | 25 |
| ADC Resolution | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit |
| 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 |
| Reel/Tape Packaging | Tape & Reel (T suffix) | Tube (no T suffix) | Tube (no T suffix) | Tape & Reel | Tape & Reel | Tube (no T suffix) |
Key Differentiators
- Wide 2.0 V-5.5 V supply for battery operation (vs PIC18F2320-I/SO)
- Tape-and-reel packaging for SMT assembly (vs PIC18LF2320-I/SO (non-T suffix))
- nanoWatt low-power modes integrated (vs PIC16F877A-I/P (legacy 8-bit MCU))
Design Notes
The PIC18LF2320T-I/SO supports brown-out reset (BOR) and a low-voltage detect (LVD) peripheral. Enable BOR in configuration bits for battery applications where Vdd can dip below 2.0 V; choose the BOR trip voltage (2.0 V, 2.7 V, 4.2 V, or 4.5 V) so the firmware halts cleanly before unsafe Vdd operation. Adding a 100 nF decoupling cap directly at each VDD pin pair and a 10 uF bulk cap on the main supply rail prevents inrush-induced resets during motor or relay switching.
Route the ICSP signals (PGC = RB6, PGD = RB7, MCLR = pin 1) as short, parallel traces with no series components other than the MCLR pull-up resistor (typically 10 kohm to VDD). Avoid sharing these pins with high-current loads if production programming is required. Place a 100 nF ceramic decoupling capacitor within 3 mm of the VDD pins (20 and 8) to suppress switching noise from the internal oscillator and ADC reference.
The MCLR pin (pin 1) is bidirectional in some PIC18 derivatives but on the PIC18LF2320 it is input-only and is shared with RE3 in software-disabled MCLR modes. Leaving MCLR floating can cause erratic resets; always include a 10 kohm pull-up to VDD. Additionally, RA4 is open-drain and requires an external pull-up if used as a digital output. Configuring the ADC without setting TRIS appropriately will result in floating inputs and noisy readings.
The 28-SOIC package dissipates very low power (typically under 50 mW even at full 40 MHz CPU and 5 V supply). In standard hand-held or industrial-control environments no heatsink is required. For sealed enclosures above 60 C ambient, ensure adequate copper on the SOIC pads and at least 100 sq mm of copper pour connected to VDD/VSS to keep junction temperature rise below 15 C. The internal die temperature should not exceed +125 C to avoid drift or permanent damage.
When using the internal 8 MHz oscillator at 40 MHz (via PLL), verify the OSCCON and OSCTUNE settings before relying on USART timing for higher baud rates above 57.6 kbps. For full-duplex RS-485 communication at 115.2 kbps and above, switch to an external high-speed crystal (HS mode) with appropriate load capacitors per the datasheet crystal table. Route the crystal traces short and symmetric with a ground guard ring to avoid coupling noise from switching I/O lines.
Compliance Information
Industrial-grade (-40 C to +85 C). Not AEC-Q100 qualified; for automotive designs choose AEC-Q100 qualified PIC18 derivatives. RoHS and REACH compliance per Microchip product declarations.
