PIC16LF1554-I/ML - 8-Bit 32MHz MCU 7KB Flash 16-QFN | Microchip
MPN: PIC16LF1554-I/ML ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.42 | $1.42 |
| 10 | $1.28 | $12.80 |
| 100 | $1.08 | $108.00 |
| 500 | $0.95 | $475.00 |
| 1,000 | $0.84 | $840.00 |
PIC16LF1554-I/ML Overview
What is an 8-bit microcontroller? An 8-bit microcontroller (MCU) is a single-chip computer with an 8-bit data path, on-board Flash program memory, RAM, peripherals, and a CPU optimized for deterministic real-time control. PIC microcontrollers belong to the RISC (Reduced Instruction Set Computer) family, with only 49 single-word instructions in the enhanced mid-range core, enabling compact code and predictable interrupt latency for embedded designs.
Key features of the PIC16LF1554 include 12 ADC channels with hardware Capacitive Voltage Divider (CVD) for noise-immune touch sensing, an internal 32kHz oscillator, and multiple low-power sleep modes with currents below 1uA typical. The 16-QFN (4x4mm) package provides a compact footprint suitable for space-constrained human-interface designs such as touch buttons, sliders, and proximity sensors.
The architecture combines a 14-bit instruction word with an 8-bit data path, allowing single-cycle operations on most instructions. The two 10-bit ADC modules can operate simultaneously for differential touch measurements, eliminating the software overhead typically required by single-ADC solutions. The XLP technology enables deep-sleep currents suitable for battery-powered IoT devices with multi-year operating life on a single coin cell.
Typical applications include mTouch capacitive touch buttons and sliders, consumer appliances with touch interfaces, low-cost remote controls, LED lighting controllers with capacitive dimming, and battery-powered IoT sensor nodes. The integrated CVD hardware specifically targets noise-sensitive touch applications where ground-coupled noise would otherwise require expensive shielding or software filtering.
When designing with the PIC16LF1554, ensure decoupling capacitors are placed within 2mm of the VDD pin and that the QFN exposed pad (EP) is soldered to a ground copper pour to achieve the specified thermal and electrical performance. The internal 32kHz oscillator is suitable for timing-sensitive sleep wake-up, but applications requiring accurate UART baud rates should use the external HFINTOSC calibration.
This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC16LF1554-I/ML — 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 PIC16LF1554-I/ML (same form factor and footprint) — differing in ADC, Package, Core Architecture, I/O Pins, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF1554-I/SL
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.92 / Unit
View Datasheet →PIC16LF1554-E/ML
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF1554-E/ST
✅ Drop-In✓ In Stock
$0.97 / Unit
View Datasheet →PIC16LF1554-I/MLVAO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F1764-E/ML
✅ Drop-In✓ In Stock
$1.05 / Unit
View Datasheet →PIC16LF15376-I/ML
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.32 / Unit
View Datasheet →PIC16LF1614-E/ML
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF1554-I/ML Maximum Ratings & Electrical Characteristics
| Product Family | PIC16 (Enhanced Mid-Range) |
| Core Architecture | 8-bit RISC (49 instructions) |
| Maximum CPU Speed | 32 MHz |
| Instruction Cycle Time | 125 ns |
| Program Memory (Flash) | 7 KB (4K x 14 words) |
| Data RAM | 512 bytes |
| Data EEPROM | 256 bytes |
| ADC Channels | 12 (two 10-bit ADC modules) |
| ADC Resolution | 10-bit |
| Supply Voltage (VDD) | 1.8 V to 3.6 V (LF variant) |
| I/O Pins | 11 |
| Package | 16-pin QFN (4x4 mm) |
| Operating Temperature | -40C to +85C (Industrial) |
| Low-Power Technology | XLP (eXtreme Low Power) |
| Special Feature | mTouch hardware CVD (Capacitive Voltage Divider) |
PIC16LF1554-I/ML Pin Configuration
| Pin 1 | RA5 — Bidirectional I/O / ADC input |
| Pin 2 | RA4 — Bidirectional I/O / ADC input |
| Pin 3 | RA3 — Bidirectional I/O / MCLR input (input only) |
| Pin 4 | RA2 — Bidirectional I/O / ADC input / CVD-capable |
| Pin 5 | RA1 — Bidirectional I/O / ADC input / CVD-capable |
| Pin 6 | RA0 — Bidirectional I/O / ADC input / CVD-capable |
| Pin 7 | VSS — Ground |
| Pin 8 | RC5 — Bidirectional I/O / ADC input |
| Pin 9 | RC4 — Bidirectional I/O / ADC input |
| Pin 10 | RC3 — Bidirectional I/O / ADC input / CVD-capable |
| Pin 11 | RC2 — Bidirectional I/O / ADC input / CVD-capable |
| Pin 12 | RC1 — Bidirectional I/O / ADC input / CVD-capable |
| Pin 13 | RC0 — Bidirectional I/O / ADC input / CVD-capable |
| Pin 14 | VDD — Positive supply (1.8V to 3.6V) |
| Pin 15 | VDDIO — I/O supply reference (typically tied to VDD) |
| Pin 16 | EP — Exposed pad - tie to ground for thermal/electrical performance |
Typical Applications
PIC16LF1554-I/ML is suitable for 6 applications: mTouch Capacitive Touch Buttons, Battery-Powered IoT Sensor Nodes, Consumer Appliance Touch UI, LED Lighting Touch Dimmer, Low-Cost Remote Controls, Industrial Proximity Sensing.
mTouch Capacitive Touch Buttons
The PIC16LF1554-I/ML's dual 10-bit ADC modules with hardware CVD (Capacitive Voltage Divider) make it ideal for capacitive touch buttons that need to reject ground-coupled noise from nearby motors or AC lines. Each ADC can sample a touch electrode in parallel with a reference channel, computing the capacitive difference in hardware and reducing firmware scan time by ~40%. With 12 ADC channels, up to 6 simultaneous touch buttons fit on the 16-QFN footprint, and the XLP sleep current below 1uA allows battery-powered touch remotes to operate for years on a coin cell.
Recommended
Battery-Powered IoT Sensor Nodes
The PIC16LF1554-I/ML's XLP technology delivers sleep currents below 1uA typical at 1.8V, enabling multi-year coin-cell operation for wireless sensor endpoints that wake periodically to read sensors and transmit. The 32 MHz core lets the MCU wake, sample, process, and return to sleep within milliseconds, minimizing average current draw. The 1.8V-3.6V VDD range covers Li-primary (3.0V), 2x alkaline (3.0V), and rechargeable Li-ion (2.5-4.2V with regulator) supplies, simplifying power-tree design in space-constrained IoT nodes.
Recommended
Consumer Appliance Touch UI
The PIC16LF1554-I/ML is well-suited for replacing mechanical buttons with capacitive sliders and touch panels in kitchen appliances, washing machines, and HVAC thermostats where the hardware CVD rejects conducted EMI from motors. The 7KB Flash fits mid-complexity touch state machines plus UART/HMI communication, while 256B EEPROM allows storing user calibration without external memory. Industrial -40C to +85C rating covers all consumer appliance environments, and the 16-QFN (4x4mm) package fits behind glass or plastic overlays with adequate noise margin.
Recommended
LED Lighting Touch Dimmer
The PIC16LF1554-I/ML's small 4x4mm QFN footprint and dual ADC hardware CVD enable integrating capacitive touch dimming directly into LED driver boards where PCB area is at a premium. The MCU generates PWM via the 10-bit ADC sampling to control LED current, with touch sensing sharing the same pins through Microchip's mTouch reference designs. Low sleep current makes battery-backup touch control feasible, and the industrial temperature grade handles the thermal environment inside enclosed LED fixtures.
Recommended
Low-Cost Remote Controls
The PIC16LF1554-I/ML offers an attractive combination of low unit cost (under $0.85 at qty 1000), 7KB Flash sufficient for IR protocol stacks (NEC, RC5, SIRC), and XLP sleep current enabling multi-year battery life from a single CR2032. The 11 GPIO pins accommodate IR TX, status LED, button matrix, and optional capacitive touch, while the 32MHz core handles protocol timing without external crystals. The 16-QFN footprint is small enough to fit inside any handheld remote housing.
Recommended
Industrial Proximity Sensing
The PIC16LF1554-I/ML's hardware CVD enables proximity sensing at distances up to several centimeters through glass or plastic, useful for industrial equipment that needs to detect hand approach without physical contact. The dual ADC modules allow differential measurements that reject common-mode noise from nearby VFD drives and motors in factory environments. The 1.8V-3.6V supply range supports 24V industrial bus systems with simple LDO regulation, and the -40C to +85C rating covers most factory floor conditions.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF1554-I/ML — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF1554-E/ML | PIC16LF1559-I/ML | PIC16LF15376-I/ML | PIC16F1764-E/ML | PIC16LF1614-E/ML |
|---|---|---|---|---|---|---|
| Package | 16-QFN (4x4 mm) | 16-QFN (4x4) - same | 20-QFN (4x4) - different | 16-QFN (4x4) - same | 16-QFN (4x4) - same | 16-QFN (4x4) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 7 KB | 7 KB | 14 KB | 28 KB | 14 KB | 7 KB |
| RAM | 512 B | 512 B | 768 B | 2 KB | 1 KB | 512 B |
| ADC Modules | 2 x 10-bit (hardware CVD) | 2 x 10-bit (CVD) | 2 x 10-bit (CVD) | 1 x 10-bit (no CVD) | 1 x 10-bit (no CVD) | 1 x 10-bit (no CVD) |
| Supply 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 | 2.3 V to 5.5 V | 1.8 V to 3.6 V |
| XLP Sleep Current | <1 uA | <1 uA | <1 uA | <1 uA | Not specified | <1 uA |
| Temperature Grade | Industrial -40C to +85C | Extended -40C to +125C | Industrial -40C to +85C | Industrial -40C to +85C | Extended -40C to +125C | Extended -40C to +125C |
Key Differentiators
- Dual 10-bit ADC with hardware CVD for capacitive touch (vs PIC16LF1614-E/ML)
- Larger Flash than the PIC16F1764 alternative (vs PIC16F1764-E/ML)
- Direct cost optimization for capacitive touch at 16 pins (vs PIC16LF1559-I/ML)
Design Notes
Place a 100 nF X7R ceramic decoupling capacitor within 2 mm of the VDD pin and a bulk 4.7 uF tantalum or ceramic capacitor at the board's power entry point. The QFN exposed pad (EP) must be soldered to a ground copper pour of at least 25 mm^2 to meet the specified thermal resistance and provide low-impedance ground return for ADC measurements. For battery-powered designs, add a 100 kohm pull-down on MCLR to prevent unwanted resets during brown-out.
Do not use floating digital inputs - configure all unused I/O pins as outputs low to minimize sleep current leakage, which can otherwise exceed the XLP specification. The internal HFINTOSC accuracy is approximately +/-2% uncalibrated; calibrate it via the OSCTUNE register at production for UART baud-rate-critical applications. When migrating from PIC16F to PIC16LF, note that the LF variant requires VDD >= 2.0V for Flash programming - below this voltage the program memory write operation will fail silently.
Route CVD-capable pins (RA0/RA1/RA2/RC0/RC1/RC2/RC3) with short traces and guarded ground pours to maximize touch sensitivity. Keep digital switching signals (PWM, UART, SPI) at least 5 mm away from touch electrodes to minimize coupled noise that the CVD hardware must reject. The ADC reference voltage (FVREF) pin should be bypassed with a 100 nF capacitor if used in external reference mode.
Compliance Information
RoHS and REACH compliant per Microchip product page. Industrial temperature variant (I/ML suffix). Not AEC-Q100 qualified - choose PIC16LF1554-E/ML or specific automotive-grade variants for automotive applications.
