PIC16LF18323T-I/ST - 8-Bit 32MHz MCU, 3.5KB Flash | Microchip
MPN: PIC16LF18323T-I/ST ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.99 | $0.99 |
| 10 | $0.89 | $8.90 |
| 100 | $0.79 | $79.00 |
| 500 | $0.69 | $345.00 |
| 1,000 | $0.59 | $590.00 |
| 3,000 | $0.52 | $1,560.00 |
PIC16LF18323T-I/ST Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), working memory (RAM), non-volatile data storage (EEPROM), and programmable peripherals into one device. The PIC16 family uses a RISC-based Harvard architecture, where the PIC16LF18323 belongs to the enhanced-mid-range subset offering 49 instructions, single-cycle hardware multiply, and deep software stack. Microcontrollers are the foundational building blocks of embedded systems, bridging sensors, actuators, and user interfaces in millions of consumer, industrial, and IoT products.
Key features of the PIC16LF18323T-I/ST include a 10-bit ADC with computation (ADC²), a 5-bit DAC, two comparators, 10-bit PWM, Capture/Compare/PWM (CCP), Configurable Logic Cells (CLC), Numerically Controlled Oscillator (NCO), Complementary Waveform Generator (CWG), and Peripheral Pin Select (PPS). These Core Independent Peripherals (CIPs) handle complex timing and signal generation in hardware without CPU intervention. eXtreme Low-Power (XLP) technology provides sleep currents as low as 50 nA typical with the WDT and BOR disabled, ideal for battery-powered designs.
The 14-pin TSSOP package exposes up to 12 I/O pins, including one dedicated I/O per pin and PPS-mappable functions. The architecture integrates a precision 32 MHz internal oscillator, eliminating the need for external crystals in cost-sensitive applications. Memory endurance is rated for 100K Flash erase/write cycles and 1M EEPROM cycles, ensuring reliable long-term data logging. The device supports in-circuit serial programming (ICSP) via two pins, enabling field firmware updates.
Typical applications include IoT sensor nodes, battery-powered wearables, capacitive-touch user interfaces, LED lighting controllers, low-power remote controls, and general-purpose embedded control. The part is well-suited to space-constrained designs where a small 14-pin TSSOP, wide voltage tolerance, and rich analog peripherals are required.
When designing with this MCU, allocate PCB area for a 0.1 µF decoupling capacitor close to VDD, place the ICSP pins on accessible test points, and use the PPS feature to remap peripherals to the optimal physical pins. Ensure unused I/O pins are configured as outputs and tied low to minimize quiescent current.
This page synthesizes distributor pricing, same-brand drop-in alternatives within the PIC16 family, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for PIC16LF18323T-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 PIC16LF18323T-I/ST (same form factor and footprint) — differing in ADC, Program Memory (Flash), Package, Comparators, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF18324T-I/ST
✅ Drop-In✓ In Stock
$0.91 / Unit
View Datasheet →PIC16LF18326T-I/ST
✅ Drop-In✓ In Stock
$0.81 / Unit
View Datasheet →PIC16F18323T-I/ST
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF18323T-I/ST Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 8-bit RISC (enhanced mid-range) |
| Core Size | 8-Bit |
| CPU Speed | 32 MHz (max) |
| Program Memory (Flash) | 3.5 KB (2K x 14 words) |
| SRAM | 256 bytes |
| EEPROM | 256 bytes |
| Supply Voltage (VDD) | 1.8 V to 5.5 V |
| Operating Temperature | -40 °C to +85 °C (Industrial, 'I') |
| I/O Pins | 12 (max) |
| Package | 14-TSSOP (ST) |
| Mounting Type | Surface Mount |
| ADC | 10-bit, with computation (ADC²) |
| DAC | 5-bit |
| Comparators | 2 |
| PWM Channels | 10-bit, multiple channels |
| Core Independent Peripherals | CLC, NCO, CWG, CCP, PPS |
| Connectivity | I²C, SPI, UART/USART |
| Programming | ICSP (In-Circuit Serial Programming) |
| Low-Power Mode (Sleep) | 50 nA typical (XLP) |
| Flash Endurance | 100 K erase/write cycles |
| EEPROM Endurance | 1 M erase/write cycles |
| MSL Level | 1 (Unlimited) |
| RoHS Status | Compliant |
PIC16LF18323T-I/ST Pin Configuration
| Pin 1 | RA2 — Bidirectional I/O with PPS, analog-capable, ICSP data |
| Pin 2 | RA3 — Bidirectional I/O with PPS, analog-capable |
| Pin 3 | RA4 — Bidirectional I/O with PPS, analog-capable |
| Pin 4 | RA5 — Bidirectional I/O with PPS, analog-capable |
| Pin 5 | VSS — Ground reference |
| Pin 6 | RA1 — Bidirectional I/O with PPS, analog-capable |
| Pin 7 | RA0 — Bidirectional I/O with PPS, analog-capable |
| Pin 8 | VPP/~MCLR — Programming voltage / Master Clear reset, internal pull-up |
| Pin 9 | RA6 — Bidirectional I/O with PPS, OSC2 |
| Pin 10 | RA7 — Bidirectional I/O with PPS, OSC1/CLKI |
| Pin 11 | RB4 — Bidirectional I/O with PPS, analog-capable |
| Pin 12 | RB5 — Bidirectional I/O with PPS, analog-capable |
| Pin 13 | RB6 — Bidirectional I/O with PPS, ICSP clock |
| Pin 14 | VDD — Positive supply voltage (1.8 V to 5.5 V) |
Typical Applications
PIC16LF18323T-I/ST is suitable for 6 applications: Battery-Powered IoT Sensor Node, Capacitive-Touch User Interface, LED Lighting and Signage Controller, Wearable Fitness and Health Band, Industrial Control and Sensor Signal Conditioning, Low-Power Remote Control (RF/IR).
Battery-Powered IoT Sensor Node
The PIC16LF18323T-I/ST is purpose-built for IoT sensor nodes running on coin cells or 2x AA batteries. Its 1.8 V to 5.5 V VDD range supports Li-ion, alkaline, and coin-cell chemistries directly, while the XLP 50 nA sleep current extends battery life into multi-year territory. With a 32 MHz core and 12 GPIO, the MCU can wake on interrupt, sample a sensor via 10-bit ADC², transmit over UART, and return to sleep within a few milliseconds. Estimated: with a 240 mAh CR2032 and 1% duty cycle, the 50 nA sleep + ~1 mA active average yields >5 years of operation. PPS allows flexible sensor pin routing, and CLC handles wake-on-motion gating in hardware without CPU. The 14-TSSOP footprint fits in sub-15 mm² sensor modules.
Recommended
Capacitive-Touch User Interface
The PIC16LF18323T-I/ST integrates Core Independent Peripherals (CIPs) ideal for capacitive-touch button sliders. The mTouch® sensing solution combines the 10-bit ADC² with the on-chip comparators to implement charge-transfer touch acquisition without an external touch IC. CLC and NCO generate stable excitation waveforms, while PPS routes touch channels to any GPIO, eliminating fixed-pin constraints. With 12 I/O pins, a 12-button keypad or 4-channel slider fits directly. The 50 nA sleep keeps battery-powered remotes dormant until a touch wakes the device. The 14-TSSOP package suits ultra-thin remote-control designs where PCB thickness is below 1 mm.
Recommended
LED Lighting and Signage Controller
For LED lighting controllers, the PIC16LF18323T-I/ST offers 10-bit PWM, Complementary Waveform Generator (CWG), and 5-bit DAC to drive constant-current LED strings. Hardware-white-glide multiphase PWM at 32 MHz produces smooth 16-bit-equivalent dimming without CPU overhead, freeing the core to run communication stacks. The wide 1.8 V to 5.5 V supply supports both 3.3 V logic and 5 V LED drivers from the same rail. Up to 12 GPIO can drive RGB channels directly for low-power signage, or buffer external MOSFET drivers via CWG for higher-current strips. With sleep at 50 nA, the device draws negligible standby power in always-connected luminaires.
Recommended
Wearable Fitness and Health Band
Wearable fitness bands and health monitors demand sub-100 mm² PCB area, sub-USD 1 BOM, and multi-month battery life: all met by the PIC16LF18323T-I/ST. The MCU's XLP technology with 50 nA sleep enables always-on heart-rate or step-counting with sub-mW average consumption. The 10-bit ADC² supports PPG (photoplethysmography) sensor readout, while I²C/SPI interfaces connect to accelerometers, gyros, and BLE modules. The 14-TSSOP package slips into thin (<5 mm) wristbands, and the -40 °C to +85 °C industrial temperature range covers outdoor run-tracking. PPS lets the PCB designer place the I²C bus on any pins without firmware rework.
Recommended
Industrial Control and Sensor Signal Conditioning
Industrial sensor signal conditioning uses the PIC16LF18323T-I/ST as a smart front-end: 10-bit ADC² handles multi-channel sensor scanning, 5-bit DAC supplies excitation, and two comparators provide windowing and fault detection. The 1.8 V to 5.5 V supply lets the same board accept 24 V industrial rails via a buck regulator to 5 V, or run directly on 3.3 V from a sensor ASIC. CLC implements Schmitt triggers and PWM modulators in hardware, freeing CPU for protocol conversion. The -40 °C to +85 °C industrial temperature rating supports outdoor enclosures. CWG drives optocouplers or solid-state relays with dead-band control.
Recommended
Low-Power Remote Control (RF/IR)
Battery-powered RF or IR remote controls leverage the PIC16LF18323T-I/ST's 50 nA sleep current to deliver multi-year standby on a single coin cell. The MCU wakes on a tactile switch interrupt, scans a keypad matrix using the CLC for debouncing, and transmits via PWM-modulated IR or SPI-driven RF module. PPS allows remapping the IR TX pin without PCB rework. The 32 MHz core generates precise 38 kHz IR carrier frequencies with minimal jitter. Industrial -40 °C to +85 °C operation tolerates outdoor garage-door remotes. 14-TSSOP keeps the BOM cost below USD 1 in production volumes.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF18323T-I/ST — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF18324T-I/ST | PIC16LF18326T-I/ST | PIC16F18323T-I/ST |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 14-TSSOP | 14-TSSOP - same | 14-TSSOP - same | 14-TSSOP - same |
| Flash Program Memory | 3.5 KB | 7 KB | 28 KB | 3.5 KB |
| SRAM | 256 bytes | 512 bytes | 2048 bytes | 256 bytes |
| EEPROM | 256 bytes | 256 bytes | 256 bytes | 256 bytes |
| Max CPU Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Supply Voltage (VDD) | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 2.3 V to 5.5 V |
| Operating Temperature | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C |
| Sleep Current (XLP) | 50 nA typical | 50 nA typical | 50 nA typical | 50 nA typical |
| I/O Pins | 12 | 12 | 12 | 12 |
Key Differentiators
- Widest supply voltage window in the 16F family at TSSOP-14 (vs PIC16F18323T-I/ST)
- Tape-and-reel TSSOP-14 for high-volume SMT lines (vs PIC16LF18323T-I/SL)
- 50 nA typical sleep current with full state retention (vs PIC16LF18326T-I/ST)
Design Notes
Decouple VDD with a 0.1 µF ceramic capacitor placed within 3 mm of the VDD pin, plus a bulk 1 µF to 10 µF tantalum or ceramic capacitor on the same rail. For battery applications, keep the bulk capacitor near the MCU to handle peak inrush during wake from sleep. Tie unused pins to defined logic (output low or input with internal pull-up enabled) to minimize leakage. Use the BOR (Brown-Out Reset) module to protect against unpredictable behavior when VDD dips below 1.8 V; BOR is selectable via configuration bits.
Place the ICSP clock (RB6) and ICSP data (RA2) pins on accessible test pads or header pins to enable in-field firmware updates. Keep crystal or external clock traces short if used; the internal 32 MHz oscillator eliminates this need in cost-sensitive designs. Maintain a solid ground plane under the MCU to reduce EMI; route high-speed signals (SPI, PWM) over the plane. Allocate 0.5 mm clearance around the TSSOP-14 pads for hand-rework if a pin needs to be lifted.
Do not apply input voltages exceeding VDD or below VSS to any GPIO pin; absolute maximum ratings require VDD + 0.3 V. Ensure PPS configuration matches physical PCB routing; remapping peripherals after firmware changes can break undocumented pin assignments. Configuration bits must be set correctly to enable the internal 32 MHz oscillator and disable the watchdog timer unless explicitly needed. The ~MCLR pin has an internal pull-up enabled by default - do not tie it directly to VDD if external reset control is desired. Watchdog timeout settings should match the application's worst-case response time to avoid unintended resets.
Compliance Information
RoHS and REACH compliant per Microchip product declaration. Lead-free finish (Matte Tin). Halogen-free per IEC 61249-2-21. Conflict-minerals declaration available. AEC-Q100 not qualified - choose PIC16F18323T-E/ST (extended temp) or Q-graded variants for automotive.
