PIC16LF18425-I/ST - 8-bit XLP MCU 14KB Flash 32MHz | Microchip
MPN: PIC16LF18425-I/ST ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.4 | $2.40 |
| 10 | $2.16 | $21.60 |
| 100 | $1.93 | $193.00 |
| 500 | $1.72 | $860.00 |
| 1,000 | $1.53 | $1,530.00 |
PIC16LF18425-I/ST Overview
A microcontroller is a single-chip computer that integrates a CPU, non-volatile program memory, working RAM, and configurable peripherals on one die. Within the broader taxonomy, the PIC16LF18425 is an 8-bit CISC microcontroller -> microcontroller unit (MCU) -> embedded processor -> semiconductor device. The 8-bit PIC16 architecture uses a Harvard design with separate program and data buses, allowing instruction fetch and operand read to occur in the same cycle for predictable, deterministic timing suitable for interrupt-driven control loops.
Key differentiating features include 1 KB of SRAM, 256 bytes of EEPROM, 12-bit ADCC with automatic averaging and threshold compare, two 10-bit PWMs, a configurable logic cell (CLC), and the Core Independent Peripherals (CIPs) family. The XLP technology provides nanoWattner sleep modes with wake-on-touch and hardware limiting on brown-out, making the part ideal for always-on edge applications powered by coin cells or energy harvesting. According to Microchip product literature, the XLP variants can hold RAM below 60 nA typical in sleep.
Typical applications include low-power IoT sensor nodes, wearable health monitors, battery-backed environmental sensors, and human-interface boards with capacitive touch. The 14-pin TSSOP with 0.65 mm pitch keeps board area below 25 mm^2 while still exposing enough I/O for SPI/I2C sensors plus a UART link to a host.
When designing with this device, plan decoupling with a 100 nF ceramic capacitor within 3 mm of VDD and a bulk 1 uF cap on AVDD if the ADCC is active; ensure ISP programming by routing ICSCLK and ICSDAT to test points or a header. The wide VDD range simplifies designs that must operate across USB-powered 3.3 V and coin-cell regimes.
This page consolidates distributor stock, drop-in alternatives in the TSSOP-14 footprint, and design notes drawn from manufacturer datasheets and reference designs - value not found on any single distributor product page.
Drop-in alternatives for PIC16LF18425-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 PIC16LF18425-I/ST (same form factor and footprint) — differing in Operating Temperature, Core Architecture, Package, ADC, DAC.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF18425-E/ST
✅ Drop-In✓ In Stock
$0.92 / Unit
View Datasheet →PIC16LF18424-I/SL
✅ Drop-In✓ In Stock
$0.85 / Unit
View Datasheet →PIC16LF18424-E/SL
✅ Drop-In✓ In Stock
$1.1 / Unit
View Datasheet →PIC16LF1825-I/ST
✅ Drop-In✓ In Stock
$1.41 / Unit
View Datasheet →PIC16LF18325-I/ST
✅ Drop-In✓ In Stock
$0.74 / Unit
View Datasheet →PIC16F18425-I/ST
✅ Drop-In✓ In Stock
$0.95 / Unit
View Datasheet →PIC16LF18425-I/ST Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC16 (Harvard, RISC-like CISC) |
| CPU Speed | 32 MHz (8 MIPS) |
| Program Memory (Flash) | 14 KB (8K x 14 words) |
| SRAM | 1 KB |
| EEPROM | 256 bytes |
| Operating Voltage (VDD) | 1.8 V to 3.6 V |
| ADC | 12-bit ADCC, up to 17 channels |
| DAC | 5-bit DAC |
| Comparators | Yes |
| PWM | 2x 10-bit PWM |
| Complementary Waveform Generator (CWG) | Yes |
| Communication | EUSART, SPI, I2C |
| Package | 14-pin TSSOP (ST) |
| Operating Temperature | -40 C to +85 C (industrial) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC16LF18425-I/ST Pin Configuration
| Pin 1 | RA3/AN3/C1IN+/CWG1IN/SS — Bidirectional I/O; analog input; comparator input; CWG input; SPI SS |
| Pin 2 | RA4/AN4/T0CKI/CWG1OUT/CCP1/PWM1 — Bidirectional I/O; analog input; timer0 clock; CWG output; CCP1/PWM output |
| Pin 3 | RA5/MCLR/VPP — Bidirectional I/O; Master Clear (reset) input / programming voltage |
| Pin 4 | RA0/AN0/C1OUT/ICSPDAT — Bidirectional I/O; analog input; comparator output; ICSP data |
| Pin 5 | RA1/AN1/C2IN+/ICSCLK — Bidirectional I/O; analog input; comparator input; ICSP clock |
| Pin 6 | RA2/AN2/DAC1OUT1/CWG1FLT — Bidirectional I/O; analog input; DAC output; CWG fault input |
| Pin 7 | VDD — Positive supply voltage (1.8 V to 3.6 V) |
| Pin 8 | VSS — Ground reference |
| Pin 9 | RB4/AN10/SDA1/SDI1 — Bidirectional I/O; analog input; I2C data; SPI data in |
| Pin 10 | RB5/AN11/RX1/SCL1 — Bidirectional I/O; analog input; EUSART RX; I2C clock |
| Pin 11 | RB6/SCK1/TX1/CK1 — Bidirectional I/O; SPI clock; EUSART TX; EUSART clock |
| Pin 12 | RB7/CCP2/PWM2 — Bidirectional I/O; CCP2 / PWM output |
| Pin 13 | RA6/OSC1/CLKIN — Bidirectional I/O; crystal oscillator in / external clock in |
| Pin 14 | RA7/OSC2/CLKOUT — Bidirectional I/O; crystal oscillator out / clock out |
Typical Applications
PIC16LF18425-I/ST is suitable for 6 applications: Battery-Powered IoT Sensor Node, Wearable Health Monitor, Capacitive Touch User Interface, Industrial Sensor Transmitter, Battery Charger / Power Monitor, Automotive Body Control (Sub-System).
Battery-Powered IoT Sensor Node
The PIC16LF18425-I/ST is well suited for coin-cell and single-cell Li-ion sensor nodes because its XLP nanoWattner sleep modes drop below 60 nA typical while retaining SRAM, enabling event-driven wake on timer or interrupt. The wide 1.8 V to 3.6 V operating range lets a single CR2032 or rechargeable Li-ion power the part without a boost converter, and the 12-bit ADCC with averaging handles temperature, light, and battery-voltage measurements with hardware averaging to keep the CPU in sleep longer. Placed near the coin-cell with a 100 nF decoupling cap and a 1 uF bulk on AVDD, this MCU routinely runs multi-year deployments on a single cell. The TSSOP-14 keeps board area under 25 mm^2, leaving room for the sensor footprint and antenna keepout zone.
Recommended
Wearable Health Monitor
The PIC16LF18425-I/ST fits wearable health patches because of its sub-60 nA sleep current, integrated 12-bit ADCC for biopotential and pulse sensors, and a TSSOP-14 footprint under 25 mm^2 that can be embedded on a flex PCB. The LF 1.8 V to 3.6 V range supports direct Li-ion or Li-poly operation, and the CWG can drive an LED or haptic buzzer without an external FET. Designers typically route heart-rate or SpO2 sensor I2C lines to fixed-pin locations, capture ADC samples in sleep-between-conversions mode, and use the EUSART to log to a host BLE module over a low-duty UART link. Compared with ARM Cortex-M0 alternatives at the same price point, the '18425 offers smaller code footprint and deterministic interrupt latency critical for fitness event timing.
Recommended
Capacitive Touch User Interface
For touch buttons, sliders, and proximity sensing, the PIC16LF18425-I/ST brings Core Independent Peripherals including the CLC and CWG that can implement touch decoding without CPU cycles. The mTouch capacitive sensing peripheral uses the ADCC and a charge-time sensor, letting a TSSOP-14 board wake only on a finger event. Typical designs use 4 to 8 touch electrodes routed to fixed pin assignments, with the CLC handling debounce and the CWG driving a haptic or LED indicator. Sleep current under 60 nA means a battery-driven remote control can last multiple years on two AAA cells, and the wide VDD range supports both alkaline and NiMH chemistries without a regulator.
Recommended
Industrial Sensor Transmitter
Factory-floor 4-20 mA loop-powered transmitters benefit from the PIC16LF18425-I/ST's industrial -40 C to +85 C operating range and wide VDD tolerance that can ride out supply transients. The 12-bit ADCC digitizes bridge pressure sensors and RTD signals with hardware averaging, while the EUSART drives a HART modem or RS-485 link. Designers typically pair the MCU with a 24 V to 3.3 V LDO and an op-amp front end; the TSSOP-14 footprint allows the entire sensor electronics to fit inside a standard M12 sensor head. Its deterministic interrupt response outperforms RTOS-based MCUs in loop-timing critical control loops.
Recommended
Battery Charger / Power Monitor
In USB-C powered accessories and single-cell Li-ion chargers, the PIC16LF18425-I/ST can act as the supervisory controller: the ADCC monitors charge current via a shunt, the CWG drives a PWM into a power MOSFET, and the EUSART reports status to a host. The wide 1.8 V to 3.6 V range lets it share the cell rail directly, while the 32 MHz core handles CC/CV profiles without an external fuel gauge. Sleep modes under 60 nA let the monitor stay on while idle, and the 14-pin TSSOP saves PCB area versus 20-pin alternatives. The DAC can be used as a programmable reference for the comparator-based end-of-charge detection.
Recommended
Automotive Body Control (Sub-System)
Although the 'I' suffix is industrial grade, design teams often prototype automotive body sub-systems on the PIC16LF18425-I/ST and migrate to the automotive-grade 'F' variant before production. Its TSSOP-14 footprint, 12-bit ADCC, and LIN-friendly EUSART fit lighting controllers, mirror switches, and ambient-light sensors. The wide VDD tolerance handles load-dump transients when paired with a TVS and small LDO. For AEC-Q100 qualified production, choose PIC16F18425-E/ST or equivalent automotive parts; this part serves as the engineering development vehicle for firmware development ahead of qualification.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF18425-I/ST — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF18425-E/ST | PIC16LF18424-I/SL | PIC16LF18424-E/SL | PIC16LF1825-I/ST | PIC16LF18325-I/ST | PIC16F18425-I/ST |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 14-pin TSSOP (ST) | 14-pin TSSOP (ST) - same | 14-pin SOIC (SL) | 14-pin SOIC (SL) | 14-pin TSSOP (ST) - same | 14-pin TSSOP (ST) - same | 14-pin TSSOP (ST) - same |
| Program Memory (Flash) | 14 KB | 14 KB | 7 KB | 7 KB | 14 KB | 14 KB | 14 KB |
| SRAM | 1 KB | 1 KB | 512 B | 512 B | 1 KB | 1 KB | 1 KB |
| ADC | 12-bit ADCC | 12-bit ADCC | 12-bit ADCC | 12-bit ADCC | 10-bit ADC | 10-bit ADC | 12-bit ADCC |
| Operating 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 | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 2.3 V to 5.5 V |
| CPU Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Operating Temperature | -40 C to +85 C | -40 C to +125 C | -40 C to +85 C | -40 C to +125 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
Key Differentiators
- 12-bit ADCC with hardware averaging (vs PIC16LF1825-I/ST)
- Wide 1.8 V to 3.6 V VDD range vs F variant (vs PIC16F18425-I/ST)
- Core Independent Peripherals (CIPs) (vs PIC16LF18325-I/ST)
- Industrial -40 C to +85 C operating range (E variant for -40 to +125 C) (vs PIC16LF18424-I/SL)
Design Notes
Place a 100 nF X7R ceramic decoupling capacitor within 3 mm of the VDD pin and a 1 uF bulk on AVDD if the ADCC is active. The 'LF' family runs from 1.8 V to 3.6 V, so a coin cell can power the device directly without a regulator. For sleep currents below 60 nA, disable unused peripherals via PMD registers, configure all unused I/O as outputs driven low, and avoid floating analog inputs that source bias current. Brown-out reset (BOR) should remain enabled to protect Flash integrity during cell collapse.
Route the ICSP pins (ICSCLK/ICSDAT) to test pads or a 1x3 100-mil header so production programming does not require expensive bed-of-nails fixtures. Keep the MCLR line short, with a 10 kohm pull-up to VDD and a capacitor to ground only if a manual reset button is used. The TSSOP-14 thermal pad is not present on this package, but a copper pour under the part improves thermal dissipation and reduces ground bounce on the ADC reference. Avoid running digital switching traces adjacent to the analog AVSS/AVDD pair.
Do not assume the PIC16LF1825 and PIC16LF18425 share registers: the ADCC, CWG, and CLC blocks on the '18425 live at different SFR addresses than the '1825's ADC and PWM. Also, do not exceed 3.6 V on VDD - the 'LF' family has no 5 V tolerance and will latch up above VDD max. The EUSART baud-rate generator uses BRGH and SPBRG values that depend on FOSC; if you change from 32 MHz to 31 kHz LPRC for sleep, you must recalculate baud values or use the auto-baud detect feature. Finally, do not leave the MCLR pin floating - it must have a pull-up.
Keep the 32 MHz external crystal traces short and symmetric, surrounded by a ground guard ring if space permits. Place the load capacitors within 2 mm of the OSC1/OSC2 pins. For analog sensors using the ADCC, route the analog signals on the inner layers away from digital switching; a 4-layer stackup with a dedicated ground plane is preferred. The DAC1OUT1 pin can be used as a low-impedance reference for the ADC if a clean reference is required - bypass it with a 100 nF cap to AVSS.
Compliance Information
Industrial grade (-40 C to +85 C); AEC-Q100 qualification not applicable for this part number. For AEC-Q100 qualified automotive versions, choose the PIC16F18425-E/ST or equivalent automotive part.
