PIC16LF1554T-I/ST - 8-bit MCU, 7KB Flash, 32MHz, TSSOP-14 | Microchip
MPN: PIC16LF1554T-I/ST ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.62 | $1.62 |
| 10 | $1.49 | $14.90 |
| 100 | $1.27 | $127.00 |
| 500 | $1.08 | $540.00 |
| 1,000 | $0.95 | $950.00 |
PIC16LF1554T-I/ST Overview
An 8-bit microcontroller (MCU) is a single-chip processor that integrates CPU core, non-volatile program memory, working RAM, and peripherals on a single silicon die. PIC microcontrollers use a RISC-style Harvard architecture where the program bus and data bus are separate, enabling single-cycle instruction execution at deterministic timing. Within the taxonomy, PIC MCUs belong to: microcontroller -> microcomputer -> embedded processor -> semiconductor IC.
Key differentiating features include up to 12 I/O pins, hardware CVD modules for robust capacitive sensing, two 10-bit ADCs with up to 11 analog channels, and XLP™ technology delivering deep-sleep currents suitable for battery-powered applications. The 14-pin TSSOP package enables compact PCB footprints while exposing the full set of mTouch channels, making the part attractive for small-form-factor touch user interfaces.
The PIC16LF1554T-I/ST uses Microchip's enhanced mid-range core with a 14-bit instruction word. Two independent ADC cores enable combined sampling rates up to 600 ksps while the hardware CVD peripheral automates touch measurement, freeing the CPU for higher-level tasks. Internal oscillator trimming eliminates the need for external crystals in many designs, reducing BOM cost and PCB area.
Typical applications include mTouch® capacitive touch buttons and sliders, low-power sensor nodes, household appliances with touch UI, battery-powered IoT endpoints, and general-purpose embedded control. The 32MHz instruction rate and 7KB Flash comfortably handle state-machine plus protocol-stack firmware for these workloads.
When designing with this device, allocate PCB area for the TSSOP-14 footprint and follow Microchip's recommended decoupling scheme (typically 100 nF near VDD). Ensure unused I/O pins are configured as outputs or pulled to a defined logic level to minimize current leakage, which is critical in XLP applications.
This page combines distributor pricing, drop-in same-package alternatives, and applied design notes beyond the manufacturer datasheet, giving engineers a single, citation-ready reference for the PIC16LF1554T-I/ST.
Drop-in alternatives for PIC16LF1554T-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 PIC16LF1554T-I/ST (same form factor and footprint) — differing in Package, ADC, Operating Temperature, Program Memory (Flash), Communication.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF1554-I/ST
✅ Drop-In✓ In Stock
$0.85 / Unit
View Datasheet →PIC16LF1554T-I/ML
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF1554-E/ST
✅ Drop-In✓ In Stock
$0.97 / Unit
View Datasheet →PIC16LF1554-E/SL
✅ Drop-In✓ In Stock
$1.08 / Unit
View Datasheet →PIC16LF1554T-I/ST Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC16 enhanced mid-range 8-bit |
| Program Memory (Flash) | 7 KB (4K x 14 words) |
| Data RAM | 256 B |
| Maximum CPU Frequency | 32 MHz |
| ADC Resolution | 10-bit (dual ADC) |
| Number of ADC Channels | 11 |
| ADC Sampling Rate | Up to 600 ksps (combined) |
| Supply Voltage Range | 1.8 V to 3.6 V |
| Number of I/O Pins | 12 |
| Operating Temperature Range | -40 C to +85 C |
| Package | TSSOP-14 |
| Mounting Type | Surface Mount |
| Technology Family | PIC® XLP™ |
| Capacitive Touch Module | mTouch® hardware CVD |
| RoHS Status | Compliant |
| Lead-Free | Yes |
PIC16LF1554T-I/ST Pin Configuration
| Pin 1 | RA3/AN3/CVD3 — GPIO / analog input 3 / CVD channel 3 |
| Pin 2 | RA4/AN4 — GPIO / analog input 4 |
| Pin 3 | RA5/MCLR/VPP — GPIO / Master Clear (reset) / programming voltage |
| Pin 4 | RA0/AN0/CVD0 — GPIO / analog input 0 / CVD channel 0 |
| Pin 5 | RA1/AN1/CVD1 — GPIO / analog input 1 / CVD channel 1 |
| Pin 6 | RA2/AN2/CVD2 — GPIO / analog input 2 / CVD channel 2 |
| Pin 7 | VSS — Ground reference |
| Pin 8 | RC0/AN8/CVD8 — GPIO / analog input 8 / CVD channel 8 |
| Pin 9 | RC1/AN9/CVD9 — GPIO / analog input 9 / CVD channel 9 |
| Pin 10 | RC2/AN10/CVD10 — GPIO / analog input 10 / CVD channel 10 |
| Pin 11 | RC3/AN11/CVD11 — GPIO / analog input 11 / CVD channel 11 |
| Pin 12 | RC4 — GPIO only |
| Pin 13 | RC5 — GPIO only |
| Pin 14 | VDD — Positive supply voltage (1.8 V to 3.6 V) |
Typical Applications
PIC16LF1554T-I/ST is suitable for 6 applications: Capacitive Touch Buttons (mTouch®), Battery-Powered IoT Sensor Nodes, Household Appliance UI, Low-Power Wearable Devices, Industrial Touch Keypads, General Embedded Control.
Capacitive Touch Buttons (mTouch®)
The PIC16LF1554T-I/ST is purpose-built for capacitive touch user interfaces thanks to its dual 10-bit ADCs with hardware CVD (Capacitive Voltage Divider) modules. Each CVD channel performs charge-and-measure sequencing automatically, allowing the firmware to read a stable touch count without CPU-intensive timing loops. With up to 11 channels in a 14-pin TSSOP, the device supports small button matrices and sliders while keeping the BOM minimal. The 32 MHz core resolves post-processing filters quickly, and XLP™ technology keeps deep-sleep current low for battery-powered remote controls.
Recommended
Battery-Powered IoT Sensor Nodes
The PIC16LF1554T-I/ST's 1.8V to 3.6V supply range makes it directly compatible with single-cell lithium and 2xAA battery stacks, while XLP™ technology minimizes sleep current between sensor reads. The integrated 10-bit ADC at up to 600 ksps samples environmental sensors (temperature, humidity, light) with no external analog front-end, and 256 bytes of RAM is sufficient for short sensor frame buffers in protocols like Sub-GHz proprietary or BLE through an external transceiver. The TSSOP-14 footprint simplifies hand-solder prototypes.
Recommended
Household Appliance UI
The PIC16LF1554T-I/ST's TSSOP-14 package and 12 I/O pins easily fit behind a sealed appliance overlay, supporting mTouch® slider/button panels for washing machines, induction cooktops, and microwave ovens. The hardware CVD module rejects moisture and AC-line noise that often disturb capacitive readings in these environments. Industrial temperature range (-40 C to +85 C) accommodates under-cabinet heat, and the dual ADC allows simultaneous button scanning and temperature monitoring for thermal protection.
Recommended
Low-Power Wearable Devices
Wearable devices such as fitness bands and smartwatches benefit from the PIC16LF1554T-I/ST's XLP™ technology, which keeps deep-sleep current well below typical self-discharge rates of coin-cell batteries. The 32 MHz core processes sensor data from accelerometers and heart-rate monitors with deterministic timing, while the dual 10-bit ADC simultaneously samples analog biosignals and battery voltage. The 14-pin TSSOP occupies less than 25 mm² of PCB, leaving room for small lithium cells and BLE modules.
Recommended
Industrial Touch Keypads
Industrial control panels require capacitive touch interfaces that survive grease, water, and ESD events. The PIC16LF1554T-I/ST's hardware CVD module applies differential measurements that cancel out moisture films on the touch surface, while the dual ADC architecture supports both keys and analog slider/wheel inputs from the same die. Industrial -40 C to +85 C operation tolerates factory-floor temperature swings, and 7 KB Flash fits IEC 61131-3 style state machines plus custom protocols.
Recommended
General Embedded Control
Beyond capacitive touch, the PIC16LF1554T-I/ST functions as a general-purpose 8-bit MCU for state machines, LED drivers, and small protocol bridges. Designers can run PWM, UART, I2C, and SPI from the same peripheral set used in mTouch applications, simplifying firmware reuse. The 32 MHz instruction rate executes typical control loops in microseconds, and 256 bytes of RAM is ample for command buffers in UART/I2C slave bridges used to retrofit older equipment.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF1554T-I/ST — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF1554-I/ST | PIC16LF1554T-I/ML | PIC16LF1554-E/ST | PIC16LF1554-E/SL |
|---|---|---|---|---|---|
| Package | TSSOP-14 | TSSOP-14 | QFN-16 (ML) - not TSSOP footprint | TSSOP-14 | SOIC-14 (SL) - not TSSOP footprint |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 7 KB | 7 KB | 7 KB | 7 KB | 7 KB |
| Data RAM | 256 B | 256 B | 256 B | 256 B | 256 B |
| Maximum CPU Frequency | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| ADC Resolution | 10-bit dual | 10-bit dual | 10-bit dual | 10-bit dual | 10-bit dual |
| Supply Voltage Range | 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 |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +125 C (extended) | -40 C to +125 C (extended) |
| Carrier Packaging | Tape & Reel | Tube | Tape & Reel | Tube | Tube |
Key Differentiators
- Dual ADC + Hardware CVD touch peripheral (vs PIC16LF1503-I/P)
- TSSOP-14 with 11 analog channels (vs PIC16LF1454-I/JQ)
- XLP™ low-power technology (vs PIC16F1554-I/ST)
Design Notes
Place a 100 nF decoupling capacitor as close as possible to the VDD pin (pin 14) and a bulk capacitor (e.g. 1 uF to 10 uF ceramic) within 5 mm of the IC. Keep the VSS ground trace short and direct to a continuous ground plane. TSSOP-14 has limited thermal dissipation; do not rely on the copper footprint to sink significant power.
Configure unused I/O pins as outputs driving low to prevent floating-gate current that can raise deep-sleep consumption above XLP™ expectations. Pull the MCLR line high via a 10 kohm resistor to VDD if not driven by an external supervisor; leaving MCLR floating can cause spurious resets in noisy environments. When using internal oscillator, calibrate via the OSCTUNE register to maintain baud-rate accuracy on UART.
Capacitive touch electrodes should be routed on a dedicated layer with a solid ground plane beneath to establish a well-defined coupling capacitance. Avoid crossing touch traces with high-frequency digital signals to prevent injected noise. Use hardware CVD averaging (per datasheet recommendations) when the touch surface is exposed to moisture or AC-line interference.
Take advantage of the XLP™ Sleep and Deep Sleep modes to maximize battery life in IoT sensor nodes. According to Microchip datasheet DS40001761E, typical deep-sleep currents are in the sub-microampere range. Wake the CPU only for short bursts of ADC sampling and radio transmission.
Compliance Information
RoHS and lead-free confirmed from distributor product pages; AEC-Q100 not applicable for this industrial-grade consumer/IoT MCU; halogen-free status not found in provided data.
