PIC16LF18323-I/ST - 8-bit MCU, 3.5KB Flash, 32MHz XLP | Microchip
MPN: PIC16LF18323-I/ST ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.18 | $1.18 |
| 10 | $1.05 | $10.50 |
| 100 | $0.85 | $85.00 |
| 500 | $0.72 | $360.00 |
| 1,000 | $0.62 | $620.00 |
| 3,000 | $0.56 | $1,680.00 |
PIC16LF18323-I/ST Overview
An 8-bit microcontroller (MCU) is a single-chip computer based on a reduced instruction set computing (RISC) architecture with an 8-bit data bus, designed for embedded control applications. MCUs integrate a CPU, non-volatile Flash memory, SRAM, EEPROM, and a rich set of peripherals (ADC, timers, communication interfaces) into one device. They belong to the broader hierarchy of microcontrollers -> microprocessors -> semiconductors -> integrated circuits, and serve as the primary compute element in low-to-mid complexity products such as IoT sensors, white goods, and battery-powered consumer devices.
Key features include the Peripheral Pin Select (PPS) function for flexible digital peripheral routing, a 10-bit Analog-to-Digital Converter (ADC) with computation, multiple low-power modes (Sleep, Doze, Idle), and communication peripherals including I2C, SPI, and UART with configurable pin mapping. The device supports 12-bit ADC resolution in select modes and offers up to 7-bit DAC functionality. These CIPs allow designers to offload tasks from the CPU, reducing firmware complexity and power consumption.
Technically, the PIC16LF18323 uses an enhanced mid-range core with a 14-bit instruction word and a two-stage pipeline capable of 200ns instruction execution. The XLP technology enables typical Sleep currents in the order of dozens of nanoamperines, with active currents around 1.5mA at 1MHz, making it ideal for energy-harvesting and battery-backed designs. Brown-out Reset (BOR), Power-On Reset (POR), and Watchdog Timer (WDT) with on-chip low-power oscillator provide robust system supervision.
Typical applications include IoT sensor nodes, wearable fitness bands, battery-operated remote controls, smart-home white goods, low-end motor control, and small appliance human-machine interfaces. The combination of low cost, flexible peripherals, and XLP makes it especially attractive for consumer electronics that must run for years on a single coin cell.
When designing with this part, observe the absolute maximum VDD of 3.6V on the LF variant, ensure decoupling with a 100nF ceramic capacitor close to VDD/VSS, and verify PPS remapping against the current device datasheet revision. The I-grade industrial temperature range supports -40C to +85C operation.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for PIC16LF18323-I/ST — 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 PIC16LF18323-I/ST (same form factor and footprint) — differing in Package, ADC, Core, Operating Temperature Range, Mounting Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF18323-I/SL
✅ Drop-In✓ In Stock
$0.74 / Unit
View Datasheet →PIC16LF18323-I/P
✅ Drop-In✓ In Stock
$0.67 / Unit
View Datasheet →PIC16LF18323-E/ST
✅ Drop-In✓ In Stock
$0.59 / Unit
View Datasheet →PIC16LF18323-E/SL
✅ Drop-In✓ In Stock
$0.95 / Unit
View Datasheet →PIC16LF18323-E/P
✅ Drop-In✓ In Stock
$0.92 / Unit
View Datasheet →PIC16LF1823-I/ST
✅ Drop-In✓ In Stock
$1.02 / Unit
View Datasheet →PIC16LF1825-I/ST
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.41 / Unit
View Datasheet →PIC16LF18323-I/ST Maximum Ratings & Electrical Characteristics
| Product Family | PIC16F (PIC16LF18323 device) |
| Core | 8-bit PIC enhanced mid-range RISC |
| Maximum Clock Speed | 32 MHz |
| Program Memory (Flash) | 3.5 KB (2K x 14 words) |
| Data SRAM | 256 bytes |
| Data EEPROM | 256 bytes |
| ADC | 10-bit, with computation |
| DAC | 5-bit / 7-bit (selectable) |
| Supply Voltage (VDD) | 1.8 V to 3.6 V (LF variant) |
| Operating Temperature | -40 C to +85 C (Industrial) |
| Package | 14-pin TSSOP (ST) |
| Mounting Type | Surface Mount |
| MSL Level | 1 (per JEDEC J-STD-020, typical for TSSOP) |
| RoHS Status | Compliant |
| AEC-Q100 | Not qualified (Industrial grade) |
| Low-Power Technology | XLP (eXtreme Low Power) |
PIC16LF18323-I/ST Pin Configuration
| Pin 1 | VDD — Positive supply voltage (1.8V to 3.6V for LF variant) |
| Pin 2 | RA5 — Port A bit 5; analog input; digital I/O via PPS |
| Pin 3 | RA4 — Port A bit 4; analog input; digital I/O via PPS |
| Pin 4 | RA3/MCLR — Port A bit 3 / Master Clear (reset) input |
| Pin 5 | RC5 — Port C bit 5; digital I/O via PPS |
| Pin 6 | RC4 — Port C bit 4; digital I/O via PPS |
| Pin 7 | RC3 — Port C bit 3; digital I/O via PPS; analog input |
| Pin 8 | RC2 — Port C bit 2; digital I/O via PPS; analog input |
| Pin 9 | RC1 — Port C bit 1; digital I/O via PPS; analog input |
| Pin 10 | RC0 — Port C bit 0; digital I/O via PPS; analog input |
| Pin 11 | RA2 — Port A bit 2; analog input; digital I/O via PPS |
| Pin 12 | RA1 — Port A bit 1; analog input; ICSPCLK |
| Pin 13 | RA0 — Port A bit 0; analog input; ICSPDAT |
| Pin 14 | VSS — Ground reference |
Typical Applications
PIC16LF18323-I/ST is suitable for 6 applications: IoT Sensor Node, Wearable Fitness Band, Battery-Operated Remote Control, Smart Home White Goods, Low-End Motor Control (Fan, Pump), Small Appliance HMI.
IoT Sensor Node
The PIC16LF18323-I/ST fits IoT sensor node applications because its 3.5KB Flash holds typical BLE/Zigbee sensor firmware and its XLP Sleep mode consumes only tens of nanoamperines, enabling coin-cell lifetimes of multiple years. The 10-bit ADC with computation handles sensor reads with hardware averaging, offloading the core. The 14-pin TSSOP footprint keeps the PCB under 50mm squared. Place a 100nF decoupling capacitor as close as possible to VDD/VSS to keep digital noise from coupling into analog reads. Used in conjunction with a PIC32MM or SAM MCU, this part excels at the always-on sensor front-end role.
Recommended
Wearable Fitness Band
For wearable fitness bands, the PIC16LF18323-I/ST delivers 32MHz performance and XLP sleep currents low enough to run an accelerometer-based step counter on a 100mAh coin cell for weeks. The CWG (Complementary Waveform Generator) and PWM modules can drive haptic feedback directly, eliminating an external driver IC. The 14-pin TSSOP is ideal for slim wearable PCBs. Use PPS to remap UART, I2C, and SPI to a single pair of pins, freeing the rest for sensor I/O. Compared with ARM Cortex-M0 alternatives, the PIC16LF18323 has a smaller code footprint and predictable interrupt latency.
Recommended
Battery-Operated Remote Control
Battery-operated remote controls benefit from the PIC16LF18323-I/ST's XLP technology and wide 1.8V-3.6V VDD, which allows direct connection to two AAA cells or a single CR2032. The 32MHz core easily handles IR protocol generation (RC5, NEC, Sony), and the 10-bit ADC can monitor battery voltage. The TSSOP-14 footprint fits inside the slim housing of a TV or set-top remote. Compared with a discrete NE555 + EPROM design, this single-chip solution cuts BOM cost and improves reliability. Operating current at 1MHz is only ~1.5mA typical, extending battery life.
Recommended
Smart Home White Goods
In smart-home white goods (refrigerators, washing machines, dishwashers), the PIC16LF18323-I/ST serves as a low-cost user-interface controller, reading capacitive touch keys, driving LED indicators, and communicating with the main appliance MCU via UART or I2C. The 10-bit ADC reads temperature sensors for safety monitoring, and the CLC implements logic glue without extra gates. The industrial temperature grade (-40C to +85C) suits the kitchen environment. The TSSOP-14 package fits on the user-panel PCB. Compared with dedicated touch controllers, this general-purpose MCU offers flexible firmware updates.
Recommended
Low-End Motor Control (Fan, Pump)
For low-end motor control such as small DC fans or pumps, the PIC16LF18323-I/ST provides up to 7-bit PWM resolution and a Complementary Waveform Generator (CWG) that produces non-overlapping gate-drive signals for H-bridge MOSFETs directly. The 32MHz core closes the control loop at 31.25kHz PWM with 10-bit resolution, sufficient for BLDC commutation in fan applications. The 14-pin TSSOP footprint simplifies PCB layout. Compared with analog op-amp motor controllers, this digital approach enables soft-start, current limiting, and fault detection in firmware.
Recommended
Small Appliance HMI
Small appliance human-machine interfaces (coffee machines, air purifiers, sous-vide cookers) benefit from the PIC16LF18323-I/ST's built-in peripherals that replace discrete logic. The CLC builds state machines for button debouncing, the 10-bit ADC reads NTC thermistors for closed-loop temperature control, and the PWM drives LED indicators or buzzer tones. The TSSOP-14 package fits into tight appliance front panels. Compared with an 8-bit Atmel AVR alternative, the PIC16LF18323 offers better low-power modes and a wider voltage range, simplifying the power tree.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF18323-I/ST — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF18323-I/SL | PIC16LF18323-I/P | PIC16LF18323-E/ST | PIC16LF18323-E/SL | PIC16LF18323-E/P | PIC16LF1823-I/ST | PIC16LF1825-I/ST |
|---|---|---|---|---|---|---|---|---|
| Package | 14-TSSOP (ST) | 14-SOIC (SL) | 14-PDIP (P) | 14-TSSOP (ST) - same | 14-SOIC (SL) | 14-PDIP (P) | 14-TSSOP (ST) - same | 14-TSSOP (ST) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 3.5 KB | 3.5 KB | 3.5 KB | 3.5 KB | 3.5 KB | 3.5 KB | 3.5 KB (older generation) | 14 KB (larger) |
| SRAM | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 128 bytes | 1024 bytes |
| EEPROM | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes |
| Maximum Clock Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +125C (Extended) | -40C to +125C (Extended) | -40C to +125C (Extended) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| Supply Voltage (VDD) | 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 | 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 |
Key Differentiators
- Identical silicon to other PIC16LF18323 package variants (vs PIC16LF18323-I/SL)
- Extended temperature grade option for harsh environments (vs PIC16LF18323-E/ST)
- Larger memory than legacy PIC16LF1823 in same TSSOP-14 (vs PIC16LF1823-I/ST)
- XLP technology for years-long battery life (vs PIC16LF1825-I/ST)
Design Notes
Place a 100nF decoupling capacitor as close as possible to the VDD (pin 1) and VSS (pin 14) pins of the PIC16LF18323-I/ST, using short traces or vias to the ground/power planes. For applications switching heavy loads, add a bulk capacitor (10uF ceramic or tantalum) near the IC. The XLP sleep current is only nanoamperines, but the inrush during wake-up events can cause VDD droop if decoupling is insufficient, leading to spurious BOR resets.
Route the ICSPDAT (RA0) and ICSPCLK (RA1) lines so that the in-circuit serial programming header does not share traces with high-current signals such as LED PWM or motor drive outputs. Keep analog inputs (RA2-RA5, RC0-RC3) short and away from switching nodes; use a ground guard ring if the design routes sensitive analog signals near digital I/O. The TSSOP-14 thermal pad is not internally connected, so no central pad is required, simplifying the land pattern.
Do not exceed 3.6V VDD on this LF variant - the regular PIC16F18323 (without L) supports up to 5.5V. Mixing the two in BOM can lead to latch-up. When migrating firmware between PIC16LF18323 and PIC16LF1823 (older generation), verify PPS mapping because the PPS output mapping registers differ. Always include MCLR pull-up (typically 10k) unless intentionally using MCLR as a reset input, otherwise noise can trigger spurious resets.
For I2C communication on the PIC16LF18323-I/ST, ensure external pull-ups are sized for the bus capacitance (typically 4.7k at 100kHz, 2.2k at 400kHz). When using PPS to remap peripherals, set both the input PPS register and the output PPS register, or the peripheral will not work. The ADC sampling rate should not exceed 100ksps to maintain 10-bit accuracy; use the ADC's hardware computation mode to offload averaging from the CPU.
Compliance Information
Industrial grade (I suffix) is not AEC-Q100 qualified; choose PIC16F18323-E/xx extended temperature variants or AEC-Q100 qualified equivalents for automotive. RoHS and REACH compliance per Microchip product page.
