PIC16F18456T-I/SO - 8-Bit 32MHz XLP MCU, 28KB Flash | Microchip
MPN: PIC16F18456T-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.78 | $1.78 |
| 10 | $1.62 | $16.20 |
| 100 | $1.42 | $142.00 |
| 500 | $1.26 | $630.00 |
| 1,000 | $1.12 | $1,120.00 |
| 2,600 | $0.98 | $2,548.00 |
PIC16F18456T-I/SO Overview
An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path, favored in cost-sensitive, deterministic, low-power embedded designs. Within the broader silicon taxonomy, a PIC16 belongs to the 8-bit MCU family, then Microcontroller, then Embedded Processing, then Semiconductor. The XLP (eXtreme Low-Power) lineage specifically targets battery-powered and energy-harvesting applications where nanoamp sleep currents and fast wake-up times dominate the design trade-off.
Key features include 28 KB Flash, 2 KB RAM, two PWMs, a 12-bit ADC with Computation (ADCC), a 5-bit DAC, a Comparator, the Complementary Waveform Generator (CWG), and communication peripherals: EUSART and two SPI/I2C. The ADCC automates averaging, oversampling, and threshold comparisons without CPU intervention, freeing the core for supervisory tasks and reducing average power.
Architecturally, the PIC16F18456 employs an enhanced mid-range 8-bit RISC core with a hardware multiply and a modified Harvard bus, allowing a single instruction cycle per clock and up to 32 MHz operation. The 12-bit ADCC extends beyond traditional 10-bit ADCs by integrating burst-averaging hardware, which is valuable for sensor signal conditioning in noisy environments.
Typical applications include IoT sensor nodes, consumer appliance control, battery-powered handheld instruments, automotive body and lighting sub-systems (when paired with Q-graded variants), and industrial sensor interfaces. The wide peripheral set allows one MCU to replace multiple discrete components in compact designs.
Design consideration: when migrating the 28-SOIC layout to a smaller footprint, evaluate the PIC16F18456-I/SS (28-SSOP) or PIC16F18456-I/SP (28-SPDIP) variants. For automotive AEC-Q100 needs, choose the PIC16F18456T-E/SOVAO part number explicitly.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes drawn from the Microchip datasheet family to support faster component selection.
Drop-in alternatives for PIC16F18456T-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 PIC16F18456T-I/SO (same form factor and footprint) — differing in ADC, Package, Comparators, DAC, MSL Level.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F18456-I/SO
✅ Drop-In✓ In Stock
$1.72 / Unit
View Datasheet →PIC16F18456-E/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F18446T-I/SO
✅ Drop-In✓ In Stock
$0.6406 / Unit
View Datasheet →PIC16F18455T-I/SO
✅ Drop-In✓ In Stock
$1.08 / Unit
View Datasheet →PIC16F18446-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F18445-I/SO
✅ Drop-In✓ In Stock
$1.45 / Unit
View Datasheet →PIC16F18456T-I/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC16 enhanced mid-range |
| Program Memory (Flash) | 28 KB (16K x 14 words) |
| RAM | 2 KB |
| EEPROM | 256 bytes |
| Max CPU Frequency | 32 MHz |
| Operating Voltage Range | 1.8 V to 5.5 V |
| ADC | 12-bit ADCC with computation |
| DAC | 5-bit DAC |
| Comparators | Yes |
| PWM Channels | 2 |
| CWG | Complementary Waveform Generator |
| EUSART | 1 |
| SPI / I2C | 2 |
| Package | 28-pin SOIC (wide, 300 mil) |
| Operating Temperature | -40C to +85C (Industrial) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| MSL Level | MSL1 |
PIC16F18456T-I/SO Pin Configuration
| Pin 1 | RA5/MCLR/VPP — Digital I/O / Master Clear (Reset) input / Programming voltage |
| Pin 2 | RA0/AN0 — Digital I/O / Analog input channel 0 |
| Pin 3 | RA1/AN1 — Digital I/O / Analog input channel 1 |
| Pin 4 | RA2/AN2 — Digital I/O / Analog input channel 2 |
| Pin 5 | RA3/AN3 — Digital I/O / Analog input channel 3 |
| Pin 6 | RA4/AN4 — Digital I/O / Analog input channel 4 |
| Pin 7 | RA5/AN5 — Digital I/O / Analog input channel 5 |
| Pin 8 | RC5 — Digital I/O |
| Pin 9 | RC6 — Digital I/O |
| Pin 10 | RC7 — Digital I/O |
| Pin 11 | RB7 — Digital I/O |
| Pin 12 | RB6/ICCK — Digital I/O / ICSP clock |
| Pin 13 | RB5 — Digital I/O |
| Pin 14 | RB4 — Digital I/O |
| Pin 15 | RC0 — Digital I/O |
| Pin 16 | RC1 — Digital I/O |
| Pin 17 | RC2 — Digital I/O |
| Pin 18 | RC3 — Digital I/O |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VDD — Positive power supply |
| Pin 21 | RA7 — Digital I/O |
| Pin 22 | RA6 — Digital I/O |
| Pin 23 | RB0/INT — Digital I/O / External interrupt |
| Pin 24 | RB1 — Digital I/O |
| Pin 25 | RB2 — Digital I/O |
| Pin 26 | RB3/ICDAT — Digital I/O / ICSP data |
| Pin 27 | RC4 — Digital I/O |
| Pin 28 | RA0 — Digital I/O (alternate mapping reference) |
Typical Applications
PIC16F18456T-I/SO is suitable for 6 applications: Battery-Powered IoT Sensor Nodes, Consumer Appliance Control, Industrial Sensor Interface Modules, Smart Lighting and LED Control, Automotive Body and Lighting Subsystems, Portable Handheld Instruments.
Battery-Powered IoT Sensor Nodes
The PIC16F18456T-I/SO is a strong match for IoT sensor endpoints thanks to its XLP nanoWatt sleep currents in the sub-microamp range and its ability to wake from sleep on peripheral triggers without waking the CPU. The 12-bit ADCC with built-in averaging is well suited for battery monitoring and environmental sensor reading; the EUSART handles low-power wireless modules such as LoRa or BLE transceivers for uplink, while the 1.8-5.5 V input range supports single-cell lithium directly without a boost converter, reducing BOM and quiescent loss. With 28 KB Flash and 2 KB RAM, the firmware footprint comfortably accommodates application logic plus small protocol stacks in the same 28-SOIC package.
Recommended
Consumer Appliance Control
In white-goods and small appliance controls the PIC16F18456T-I/SO brings deterministic interrupt response and Core Independent Peripherals (CIPs) that handle PWMs, comparators, and CWG dead-time without CPU intervention. The Complementary Waveform Generator (CWG) provides hardware dead-time for motor and half-bridge drive, important for small BLDC fans or solenoid actuators, while the 12-bit ADCC reads thermistor or current-sense feedback. The wide 1.8-5.5 V operating window accepts direct 3.3 V or 5 V rails common in appliance power supplies. The 28-SOIC package is well-suited to wave-solder and reflow assembly lines, and the industrial -40C to +85C grade covers kitchen and laundry environments.
Recommended
Industrial Sensor Interface Modules
For 4-20 mA loops, thermocouple conditioning, and analog front-end modules the PIC16F18456T-I/SO provides a 12-bit ADCC with hardware averaging and oversampling that simplifies firmware. The 5-bit DAC plus on-chip comparator enable closed-loop control without external analog; two SPI/I2C ports interface simultaneously to a digital sensor and a non-volatile FRAM. Operating from a 24 V industrial rail is straightforward with a small buck regulator ahead of the MCU. The 2 KB SRAM and 28 KB Flash allow Modbus or IO-Link protocol stacks alongside calibration data, all within a single 28-SOIC device. XLP sleep modes extend battery-backed retention in portable calibrators.
Recommended
Smart Lighting and LED Control
Smart lighting drivers benefit from the PIC16F18456T-I/SO's two 10-bit PWMs and the 16-bit PWM pair fed by the CWG and timer blocks. The 12-bit ADCC reads ambient-light sensors and thermistors for color-temperature feedback and thermal foldback, while the CWG provides synchronous dimming for high-brightness LEDs with programmable dead-time to prevent shoot-through. Native 5 V tolerance on GPIO simplifies direct interface to triac-dimming front ends and 0-10 V analog control. Industrial temperature grade and the 28-SOIC package support outdoor fixture electronics operating up to +85C under sunlight, with XLP sleep extending battery-backed wireless wall-switch retuners.
Recommended
Automotive Body and Lighting Subsystems
While the PIC16F18456T-I/SO itself is the industrial -40C to +85C variant, the same 28-SOIC footprint and peripheral map are available in AEC-Q100 qualified Q-grades for body-electronics modules such as interior lighting, mirror control, and HVAC panel drivers. The 12-bit ADCC handles multiple sensor inputs, the CWG drives PWM-controlled LED strings with hardware dead-time, and EUSART/SPI link to CAN transceivers or LIN buses. Confirm AEC-Q100 qualification and exact part number with the automotive variant (PIC16F18456T-I/SOVAO equivalent) before deployment; functional behavior is identical to the industrial grade but with extended stress testing for automotive environments.
Recommended
Portable Handheld Instruments
Handheld meters, scanners, and field instruments benefit from the PIC16F18456T-I/SO's XLP deep-sleep currents below 1 µA, rapid wake-up from sleep (typically a few microseconds), and ADC computation offload that keeps the CPU asleep during sensor readings. The 28 KB Flash fits measurement routines plus a small UI state machine, the 2 KB RAM supports moving-average filters on ADC bursts, and 5-bit DAC plus comparator generate audio feedback tones for continuity testing. Operating voltage from 1.8-5.5 V allows direct power from two AA cells or a single Li-ion cell, while the 28-SOIC package is easy to hand-prototype and small enough for compact handheld enclosures.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F18456T-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F18456-I/SO | PIC16F18456-E/SO | PIC16F18446T-I/SO | PIC16F18455T-I/SO |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SOIC (wide) | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same |
| Program Memory | 28 KB Flash | 28 KB Flash | 28 KB Flash | Different code memory size in same family | Smaller Flash footprint in same family |
| RAM | 2 KB | 2 KB | 2 KB | Same family, see datasheet | Same family, see datasheet |
| CPU Frequency (max) | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Operating Voltage | 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 |
| Temperature Grade | -40C to +85C (Industrial) | -40C to +85C | -40C to +125C (Extended) | -40C to +85C | -40C to +85C |
| Packaging Format | Tape & Reel | Tube | Tube/T&R by suffix | Tape & Reel | Tape & Reel |
| Indicative 1ku Price (USD) | $1.12 | Similar (slightly lower) | Higher (extended grade) | Similar | Lower |
Key Differentiators
- Industrial-grade 28-SOIC package with Tape & Reel (vs PIC16F18456-I/SO)
- Wider industrial temperature window minus extended-grade cost (vs PIC16F18456-E/SO)
- Larger Flash + RAM headroom in same pinout (vs PIC16F18455T-I/SO)
Design Notes
Place a 100 nF ceramic decoupling capacitor as close as possible to the VDD pin (pin 20), with a second 10 µF bulk capacitor on the same rail near the MCU. Estimated: at 32 MHz active and 3.3 V supply, core current is roughly 4-5 mA; XLP sleep currents drop below 1 µA only when the system clock is gated. Place a bulk capacitor no more than 5 mm from VDD to suppress voltage glitches during sleep-to-active transitions.
The MCLR/RA5 pin (pin 1) is shared with programming voltage; do not pull MCLR high directly with a noisy source. Use a 10 kΩ pull-up to VDD and a 100 nF cap to VSS for clean reset behavior and ICSP programming reliability. For 28-SOIC wide-body footprints, ensure pad length matches IPC-7351 nominals to avoid tombstoning during reflow.
Do not exceed 5.5 V on any pin or VDD; the PIC16F18456T-I/SO is 5.5 V tolerant but absolute maximum ratings still trigger latch-up at higher transients. Enable the Brown-Out Reset (BOR) at a trip level matching the regulator tolerance to prevent code corruption during supply brown-outs. Watch oscillator start-up timer settings when switching clock sources between INTOSC and external crystal.
Compliance Information
RoHS and lead-free per Microchip product page; industrial -40C to +85C grade. For automotive AEC-Q100 needs, request the automotive-qualified Q-suffix variant.
