PIC16F1518T-I/SO - 28KB Flash 8-bit MCU 28-SOIC | Microchip
MPN: PIC16F1518T-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.65 | $2.65 |
| 10 | $2.42 | $24.20 |
| 100 | $2.18 | $218.00 |
| 500 | $1.95 | $975.00 |
| 1,000 | $1.78 | $1,780.00 |
| 1,600 | $1.62 | $2,592.00 |
PIC16F1518T-I/SO Overview
A microcontroller (MCU) is a single-chip computer that integrates a processor, volatile memory, non-volatile program storage, and configurable peripherals on one die. PIC16F1xxx parts belong to the enhanced mid-range PIC16 family, which in turn falls under the 8-bit PIC® architecture, then RISC microcontrollers, then embedded controllers, then semiconductors. The eXtreme Low Power (XLP™) sub-family is optimized for battery-powered and energy-harvesting applications where quiescent current and sleep-mode leakage dominate total energy budget.
Key differentiating specifications include 17 channels of 10-bit ADC with voltage reference, an internal 16 MHz high-accuracy oscillator, two CCP modules for capture/compare/PWM, MI2C + SPI + EUSART (with auto-baud) serial interfaces, 25 mA source/sink I/O drive, and a high-endurance data Flash block rated for 100,000 write/erase cycles in the lower 128 bytes of program memory. The 28-SOIC package provides 25 mA I/O drive directly to LEDs, simplifying low-pin-count human-interface designs.
The PIC16F1518T-I/SO architecture implements a 14-bit instruction word with 49 instructions and 16 stack levels, giving a deterministic 200 ns instruction execution at 20 MHz. The MI2C and SPI peripherals run from the system clock with hardware address masking, while the EUSART adds RS-232/485 and LIN-master capability with auto-baud detection - useful for industrial sensor nodes.
Typical applications include battery-powered IoT sensor nodes, low-cost LCD user-interface boards, low-end motor-control sub-PLDs (PWM + ADC feedback), HVAC thermostat controllers, and consumer remote controls. The wide 1.8 V to 5.5 V range lets one design migrate from 2-cell alkaline (3 V) directly to USB (5 V) without re-validating the firmware.
When designing with this part, populate the MCLR pin with the recommended 10 kohm pull-up unless the in-circuit debugger requires disabling; leaving MCLR floating can cause spurious resets in noisy environments. Decouple VDD/VSS with at least 100 nF placed within 5 mm of the pins, plus a bulk 1 uF to handle ADC switching transients.
This page synthesizes distributor pricing, drop-in alternatives sourced from Microchip's PIC16(L)F1516/1517/1518/1519 family datasheet, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC16F1518T-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 PIC16F1518T-I/SO (same form factor and footprint) — differing in ADC, I/O Pins, Operating Temperature, Package, Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F1518-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F1519T-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F1516T-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F1513-I/SS
✅ Drop-In✓ In Stock
$1.02 / Unit
View Datasheet →PIC16F1518-I/SS
✅ Drop-In✓ In Stock
$1.2 / Unit
View Datasheet →PIC16F1518T-I/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC® enhanced mid-range (49 instructions) |
| Maximum CPU Speed | 20 MHz (200 ns instruction cycle) |
| Program Memory (Flash) | 28 KB (16K x 14 words) |
| SRAM | 1024 bytes |
| EEPROM | 256 bytes |
| Supply Voltage (VDD) | 1.8 V to 5.5 V |
| Operating Temperature | -40C to +85C (industrial, I grade) |
| Package | 28-pin SOIC (SO, wide body, 7.50 mm) |
| I/O Pins | 25 mA source/sink on selected pins |
| ADC | 10-bit, 17 channels, with voltage reference |
| Internal Oscillator | 16 MHz (high accuracy, factory calibrated) |
| CCP Modules | 2 (Capture / Compare / PWM) |
| Timers | Two 8-bit, one 16-bit |
| Serial Interfaces | MI2C, SPI, EUSART (auto-baud) |
| Stack Levels | 16 |
| Data Flash Endurance | 100,000 W/E cycles (lower 128 bytes of program memory) |
| MSL Level | 1 (unlimited floor life at <30C/85% RH) |
| RoHS Status | Compliant |
PIC16F1518T-I/SO Pin Configuration
| Pin 1 | MCLR/VPP/RA5 — Master Clear (reset) input / programming voltage / PORTA bit 5 |
| Pin 2 | RA0/AN0/ULPWU — PORTA bit 0 / ADC input 0 / ultra-low-power wake-up |
| Pin 3 | RA1/AN1 — PORTA bit 1 / ADC input 1 |
| Pin 4 | RA2/AN2 — PORTA bit 2 / ADC input 2 |
| Pin 5 | RA3/AN3/VREF+ — PORTA bit 3 / ADC input 3 / ADC voltage reference positive |
| Pin 6 | RA4/AN4 — PORTA bit 4 / ADC input 4 |
| Pin 7 | RA5 — PORTA bit 5 (also MCLR pin 1 shared on some pinouts) |
| Pin 8 | VSS — Ground reference |
| Pin 9 | RA7/OSC1 — PORTA bit 7 / crystal oscillator input |
| Pin 10 | RA6/OSC2 — PORTA bit 6 / crystal oscillator output |
| Pin 11 | RC0/SOSCO — PORTC bit 0 / secondary oscillator output |
| Pin 12 | RC1/SOSCI — PORTC bit 1 / secondary oscillator input |
| Pin 13 | RC2/CCP1 — PORTC bit 2 / Capture/Compare/PWM 1 |
| Pin 14 | RC3/SCL1/CCP2 — PORTC bit 3 / I2C clock / Capture/Compare/PWM 2 |
| Pin 15 | RC4/SDA1 — PORTC bit 4 / I2C data |
| Pin 16 | RC5/SDO1 — PORTC bit 5 / SPI data out |
| Pin 17 | RC6/TX1/CK1 — PORTC bit 6 / EUSART transmit / clock |
| Pin 18 | RC7/RX1/DT1 — PORTC bit 7 / EUSART receive / data |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VDD — Positive supply voltage |
| Pin 21 | RB0/AN12 — PORTB bit 0 / ADC input 12 |
| Pin 22 | RB1/AN10 — PORTB bit 1 / ADC input 10 |
| Pin 23 | RB2/AN8 — PORTB bit 2 / ADC input 8 |
| Pin 24 | RB3/AN9 — PORTB bit 3 / ADC input 9 |
| Pin 25 | RB4/AN11 — PORTB bit 4 / ADC input 11 |
| Pin 26 | RB5/AN13 — PORTB bit 5 / ADC input 13 |
| Pin 27 | RB6/ICSPCLK — PORTB bit 6 / in-circuit serial programming clock |
| Pin 28 | RB7/ICSPDAT — PORTB bit 7 / in-circuit serial programming data |
Typical Applications
PIC16F1518T-I/SO is suitable for 6 applications: Battery-Powered IoT Sensor Nodes, HVAC Thermostat Controller, Industrial Sensor Transmitter (4-20 mA Loop), Low-End BLDC Motor Sub-Controller, Consumer Remote Control (IR/RF), LCD User-Interface Board.
Battery-Powered IoT Sensor Nodes
The PIC16F1518T-I/SO fits battery-powered IoT sensor nodes because its eXtreme Low Power (XLP™) technology drives sleep current below 100 nA, and the 1.8 V to 5.5 V VDD range lets it run directly from a single lithium primary cell down to end-of-life without a boost converter. The 17-channel 10-bit ADC reads multiple analog sensors (temperature, light, battery voltage) while the EUSART with auto-baud links to a wireless module over UART. The 28 KB Flash accommodates OTA update staging buffers; 1024 B SRAM is sufficient for sensor frame buffers. Use the internal 16 MHz oscillator to skip an external crystal and minimize sleep-mode leakage. Add a 100 nF decoupling capacitor within 5 mm of VDD/VSS pins to suppress ADC sampling transients.
Recommended
HVAC Thermostat Controller
The PIC16F1518T-I/SO suits HVAC thermostat controllers because its 17-channel 10-bit ADC reads multiple temperature zones and setpoint potentiometers without external signal conditioning, while two CCP modules generate PWM outputs for damper and fan motor speed control. The EUSART with auto-baud links to a Wi-Fi module for remote control, and 28 KB Flash stores schedule/firmware logic. Operating from 1.8 V to 5.5 V lets the same board run from 24 VAC half-wave rectified supply (after regulation). Pair with an SPI-display driver for local UI; the 25 mA source/sink I/O drive LEDs and relay coils directly without buffer transistors. Use the MI2C port to expand with an external RTC and EEPROM for timekeeping across power cycles.
Recommended
Industrial Sensor Transmitter (4-20 mA Loop)
The PIC16F1518T-I/SO fits 4-20 mA industrial loop transmitters because its 10-bit ADC with voltage reference digitizes sensor signals with 0.1% resolution, and the EUSART with auto-baud enables HART-modem communication for bidirectional diagnostics. The 1.8 V minimum VDD allows a low-dropout regulator to derive logic power directly from the loop, simplifying intrinsically safe designs. 28 KB Flash holds calibration coefficients and HART command stacks; 256 B EEPROM stores per-unit calibration data. The 28-SOIC package is suitable for through-hole industrial enclosures, and the -40C to +85C industrial range covers outdoor installations. Connect the EUSART to a HART modem IC like AD5700 for protocol-compliant communications.
Recommended
Low-End BLDC Motor Sub-Controller
The PIC16F1518T-I/SO serves as a low-end BLDC motor sub-controller because its two CCP modules provide complementary PWM outputs for a 3-phase gate driver, while the 17-channel 10-bit ADC samples back-EMF for sensorless rotor position estimation. The 25 mA I/O source/sink rating directly drives low-side gate-driver inputs without buffers. 20 MHz instruction rate keeps the commutation loop under 50 us with margin for filter math. The 1.8 V to 5.5 V VDD range supports 3.3 V logic gate drivers; the 28-SOIC footprint simplifies hand-soldering in prototype builds. Pair the CCP outputs with a 3-phase driver like FAN7888 and a comparator for back-EMF zero-crossing detection.
Recommended
Consumer Remote Control (IR/RF)
The PIC16F1518T-I/SO is well-suited for consumer remote controls because its XLP™ sleep current below 100 nA extends battery life to multi-year levels on a coin cell, while the 28 KB Flash stores multiple protocol stacks (NEC, RC5, SIRC). The CCP modules generate 38 kHz carrier PWM for IR transmission, and the 25 mA I/O pin directly drives an IR LED without a discrete driver transistor. The internal 16 MHz oscillator eliminates the external resonator that would otherwise idle during sleep. 1024 B SRAM handles protocol buffering; the MI2C port connects to an external accelerometer for motion-activated wake-up. Operate directly from a CR2032 coin cell (3 V nominal) within the 1.8 V to 5.5 V range.
Recommended
LCD User-Interface Board
The PIC16F1518T-I/SO drives character or graphic LCD user-interface boards because the SPI peripheral streams pixel data to LCD controllers at high rates while the 10-bit ADC reads up to 17 button/sensor inputs from a resistive touch panel. The 28 KB Flash holds multi-language UI strings and bitmap assets; 256 B EEPROM stores user preferences. The 25 mA source/sink I/O drives the LCD contrast bias network directly. The 1.8 V to 5.5 V VDD range supports 3.3 V and 5 V LCD modules without level shifters. Use the EUSART to upload debug logs from a development PC during prototyping. The 28-SOIC wide-body package is easy to hand-prototype and rework in low-volume runs.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F1518T-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F1518-I/SO | PIC16F1519T-I/SO | PIC16F1516T-I/SO | PIC16F1513-I/SS | PIC16F1518-I/SS |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SOIC | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same | 28-SSOP - footprint-compatible shrink | 28-SSOP - footprint-compatible shrink |
| Program Memory (Flash) | 28 KB | 28 KB | 32 KB | 14 KB | 7 KB | 28 KB |
| SRAM | 1024 B | 1024 B | 1024 B | 1024 B | 512 B | 1024 B |
| EEPROM | 256 B | 256 B | 256 B | 256 B | 128 B | 256 B |
| Maximum CPU Speed | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 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 | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
| ADC Channels | 17 channels x 10-bit | 17 channels x 10-bit | 17 channels x 10-bit | 17 channels x 10-bit | 11 channels x 10-bit | 17 channels x 10-bit |
| Price (qty 1, USD) | 2.65 | 2.55 | 2.85 | 2.20 | 1.95 | 2.60 |
Key Differentiators
- Highest Flash density in its family within a 28-SOIC footprint (vs PIC16F1516T-I/SO)
- Larger SRAM than smaller-density family siblings (vs PIC16F1513-I/SS)
- Wider ADC channel count than older PIC16F1509 (vs PIC16F1509T-I/SS)
Design Notes
Estimated: at 20 MHz core clock, VDD = 5.0 V, executing from Flash, typical active current is approximately 2.2 mA; in sleep mode (XLP™ Sleep, peripherals off), current drops below 100 nA typical. Place a 100 nF decoupling capacitor within 5 mm of each VDD/VSS pin pair and a bulk 1 uF near the package to suppress ADC sampling transients and prevent core brown-out during high-current CCP switching.
Keep the MCLR pin pulled up with a 10 kohm resistor to VDD; leaving MCLR floating causes spurious resets in noisy environments. If using in-circuit serial programming (ICSP), add a diode or resistor network per Microchip AN1254 to allow debugger connection while protecting MCLR from in-circuit ESD events. Place the 16 MHz crystal (if used) within 5 mm of OSC1/OSC2 with guard traces to ground.
Do not exceed 5.5 V on any pin; the absolute maximum rating for VDD is 6.5 V but ADC accuracy degrades above 5.5 V. When using the internal 16 MHz oscillator for UART communications, enable the PLL (where available) to provide the 0.16% frequency accuracy required for reliable EUSART reception at higher baud rates. The CCP2 pin (RC3) is multiplexed with the SCL1 I2C clock - configure PPS or pin function carefully to avoid bus conflicts in mixed MI2C + SPI designs.
Compliance Information
RoHS and REACH compliance confirmed via Microchip product page. Industrial temperature grade (I suffix), -40C to +85C; AEC-Q100 automotive variants are not offered for this part. Lead-free (Pb-free) reflow-compatible per JEDEC J-STD-020.
