PIC16LF1566-E/SO - 8-Bit 32MHz MCU 14KB Flash 28-SOIC | Microchip
MPN: PIC16LF1566-E/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.45 | $2.45 |
| 10 | $2.21 | $22.10 |
| 100 | $1.93 | $193.00 |
| 500 | $1.66 | $830.00 |
| 1,000 | $1.42 | $1,420.00 |
PIC16LF1566-E/SO Overview
A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory (Flash/ROM), working memory (RAM), and a rich set of peripherals such as ADC, timers, PWM, and communication blocks. PIC microcontrollers use a RISC-based Harvard architecture with separate program and data buses, optimized for deterministic instruction timing and ultra-low power operation. The "LF" prefix indicates a wide-Vdd, low-Frequency/flexible-power variant supporting 1.8V-3.6V operation with the nanoWatt XLP sleep modes, while the "E" suffix denotes the industrial temperature grade (-40C to +125C). The PIC16LF1566 belongs to the PIC16 > PIC® 16F series > PIC® XLP > 8-bit microcontroller > MCU > semiconductor hypernym hierarchy.
Key features per the PIC16LF1566/1567 datasheet include up to 23 analog channels routed to two 10-bit ADCs with automated hardware CVD (Capacitive Voltage Divider) modules achieving a combined 600 ksps sampling rate, two PWM modules, and multiple serial communication peripherals (I2C, SPI, UART with AUSART). The 28-pin SOIC variant is well suited to hand-soldering and breadboard-friendly prototyping where QFN is not practical.
Architecturally, the device integrates a hardware CVD engine designed for mTouch® capacitive touch sensing, allowing direct measurement of capacitance without external analog front ends. Combined with dual 10-bit ADCs operating from the internal FRC or external oscillator, the PIC16LF1566 efficiently services touch-key, proximity, and slider sensing alongside mixed-signal housekeeping tasks in a single chip.
Typical applications include mTouch® capacitive touch key panels, human-machine interface (HMI) front ends with sliders and proximity, multi-channel sensor aggregation nodes, low-power battery-powered IoT end nodes, and general-purpose 8-bit embedded control in industrial or appliance systems. The XLP nanoWatt technology enables years of operation from coin cells in duty-cycled sensing applications.
When designing, ensure the application firmware budget stays within the 14 KB Flash and that ADC sampling sequences account for the CVD acquisition timing. Pick the SOIC package variant when through-hole-style rework or hand-prototyping matters; use the SSOP/SDIP variants for higher pin-count derivatives of the family.
This page synthesizes distributor pricing, drop-in alternatives and practical design notes not found in the manufacturer datasheet alone, enabling engineers to evaluate the PIC16LF1566-E/SO for touch-sensing and general-purpose 8-bit designs.
Drop-in alternatives for PIC16LF1566-E/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 PIC16LF1566-E/SO (same form factor and footprint) — differing in ADC, Package, Mounting Type, Operating Temperature, Family.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF1566-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF1566T-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF1566-E/SP
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.18 / Unit
View Datasheet →PIC16LF1554-E/SO
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC16LF1455-I/SL
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.62 / Unit
View Datasheet →PIC16LF1566-E/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC (RISC, Harvard) |
| Family | PIC® XLP™ 16F |
| Series | PIC16LF1566 |
| Maximum CPU Frequency | 32 MHz |
| Program Memory (Flash) | 14 KB (8K x 14 words) |
| Supply Voltage (Vdd) | 1.8 V to 3.6 V (LF wide-Vdd range) |
| Operating Temperature | -40 C to +125 C (Industrial, "-E") |
| Package | 28-SOIC (7.50 mm / 0.295" body width) |
| Mounting Type | Surface Mount (Gull-Wing SOIC) |
| ADC | Two 10-bit ADCs with hardware CVD, up to 23 analog channels |
| Combined ADC Sampling Rate | 600 ksps (total across both ADCs) |
| PWM Modules | 2 |
| Communication Peripherals | I2C, SPI, AUSART (UART) |
| Low-Power Technology | nanoWatt XLP™ (ultra-low-power sleep modes) |
| Touch Sensing | mTouch® hardware CVD engine |
| MSL Level | 1 (per SOIC surface-mount classification) |
| RoHS Status | Compliant |
PIC16LF1566-E/SO 28-soic (7.50 mm / 0.295" body width) Pin Configuration Guide
Pin configuration for PIC16LF1566-E/SO (28-soic (7.50 mm / 0.295" body width) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for PIC16LF1566-E/SO.
Refer to the datasheet for full pin configuration.
Typical Applications
PIC16LF1566-E/SO is suitable for 6 applications: mTouch® Capacitive Touch Key Panel, Battery-Powered IoT Touch End Node, Industrial Sensor Aggregation Node, Home Appliance HMI Front Panel, Automotive Interior Lighting Controller, Medical Device Touch Interface.
mTouch® Capacitive Touch Key Panel
The PIC16LF1566-E/SO is purpose-built for mTouch® capacitive touch key panels. Its hardware CVD (Capacitive Voltage Divider) engine offloads the charge-measurement sequence from firmware, allowing the CPU to remain in nanoWatt XLP sleep between scans. With up to 23 analog channels routed to two 10-bit ADCs at a combined 600 ksps, a single 28-SOIC part can serve 8 to 16 touch keys plus a proximity sensor, reducing external analog front-end components and BOM cost in appliance, consumer, and industrial HMI panels.
Recommended
Battery-Powered IoT Touch End Node
The PIC16LF1566-E/SO supports years of operation on coin-cell batteries in duty-cycled IoT end nodes that wake on touch or schedule. It operates from 1.8 V to 3.6 V with nanoWatt XLP sleep modes measured in nanoamperes, while keeping the CVD engine ready to wake the core on a touch event. Compared with a generic 8-bit part, the integrated ADC + CVD combination eliminates the external analog front end and reduces average current in touch-event-driven IoT nodes to extend battery service life.
Recommended
Industrial Sensor Aggregation Node
The PIC16LF1566-E/SO is well suited to multi-channel industrial sensor aggregation nodes. Its two 10-bit ADCs sample up to 23 channels for thermistor, voltage, current, or photo-sensor inputs, while the PWM modules drive actuator or LED feedback and the AUSART pins report to a Modbus RTU or RS-485 master. Operating from 1.8 V to 3.6 V across -40 C to +125 C, the part absorbs harsh industrial environments and removes the need for external analog multiplexers.
Recommended
Home Appliance HMI Front Panel
Home appliance HMI front panels benefit from the PIC16LF1566-E/SO's mTouch® capacitive sliders, proximity sensing, and integrated LED-driving capability. The CVD hardware directly senses capacitive sliders and proximity rings, while the PWM modules fade illumination and the I2C peripheral drives the appliance main controller. Compared to mechanical button implementations, the touch-based HMI panel simplifies the mechanical design and improves reliability since there are no moving parts in the user interface.
Recommended
Automotive Interior Lighting Controller
Although not AEC-Q100 certified, the PIC16LF1566-E/SO is used as a proof-of-concept or development platform for automotive interior lighting controllers. Its dual 10-bit ADCs read ambient light and potentiometer inputs, while the PWM modules generate smooth fade/dim signals for RGB LED strips and the AUSART/SPI peripherals accept command from the body controller. Designers prototype on the industrial-grade part before transitioning to a -Q1 AEC-Q100 qualified variant for production.
Recommended
Medical Device Touch Interface
The PIC16LF1566-E/SO serves medical device touch interfaces where sealed, easy-to-clean front panels are required. mTouch™ sensing operates behind glass or plastic overlays, eliminating mechanical buttons that can harbor contaminants. Its dual ADCs with 23 analog channels handle touch keys plus temperature or battery-monitoring inputs, while the nanoWatt XLP sleep modes extend battery runtime on portable medical devices. Industrial -E temperature grade supports clinical environment operating ranges.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF1566-E/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF1566-I/SO | PIC16LF1566T-I/SO | PIC16LF1554-E/SO | PIC16LF1455-I/SL |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SOIC | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same | 14-SOIC - smaller |
| Core Architecture | 8-bit PIC RISC | 8-bit PIC RISC | 8-bit PIC RISC | 8-bit PIC RISC | 8-bit PIC RISC |
| Maximum CPU Frequency | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 48 MHz (XLP USB family) |
| Analog Channels (max) | 23 (two 10-bit ADCs) | 23 | 23 | Reduced (no dedicated CVD engine) | Reduced |
| Hardware mTouch® CVD Engine | Yes | Yes | Yes | No (general-purpose 16F) | No (USB-focused 16F) |
| Temperature Grade | Industrial -40C to +125C (-E) | Industrial -40C to +85C (-I) | Industrial -40C to +85C (-I) | Industrial -40C to +125C (-E) | Industrial -40C to +85C (-I) |
Key Differentiators
- Dedicated mTouch® hardware CVD engine eliminates firmware scan loops (vs PIC16LF1554-E/SO)
- 23 analog channels with dual 10-bit ADCs at 600 ksps combined (vs PIC16LF1455-I/SL)
- Industrial -E temperature grade as standard, not just on order code (vs PIC16LF1566-I/SO)
Design Notes
Decouple Vdd with a 100 nF ceramic capacitor placed within 5 mm of the Vdd/Vss pins. For applications relying on nanoWatt XLP sleep current, place a bulk 1-10 uF capacitor on the Vdd rail to support the brief in-rush when waking from sleep. Verify in-rush does not exceed regulator transient response; otherwise increase bulk capacitance. Estimated: with CVD engine active, peak current at 32 MHz is in the low-mA range, dominated by ADC conversion.
For mTouch® capacitive sensing, route touch sensor traces as short, guarded traces on a dedicated layer with a ground flood around each sensor pad. Avoid ground fill directly under sensor pads because it adds parasitic capacitance that reduces sensitivity. Reference Microchip TB1095 (mTouch™ Design Kit) for guard ring and sensor pad sizing guidelines. Estimated: sensor pad trace capacitance is typically 5-15 pF; trace length should remain under 50 mm where possible.
Do not omit the 100 nF decoupling capacitor near Vdd even in low-cost designs - the dual ADC switching at 600 ksps combined creates switching transients that can corrupt nearby analog channels. Also, ensure the MCLR pin has a valid pull-up unless the internal MCLR is configured. Programming/debug tools (PICkit 4, ICD 4, MPLAB Snap) require specific debug header pinout - consult the device datasheet programming specifications before laying out the debug interface footprint.
Route the external oscillator traces (OSC1/OSC2) short and symmetrical to minimize stray capacitance and EMI pickup. If using the internal 32 MHz HFINTOSC, route the OSC2 pin to a quiet ground or leave unconnected to avoid coupling noise into the ADC. Estimated: with 16 MHz CPU and 600 ksps ADC, the supply rail ripple budget is approximately 10-20 mV peak-to-peak for 10-bit effective resolution.
Compliance Information
RoHS compliant per Microchip product page. Industrial -E temperature grade only; not AEC-Q100 qualified. For AEC-Q100 automotive applications use a -Q1 qualified part number from the same family.
