PIC16LF1559-I/P - 8-Bit 32MHz 14KB Flash MCU | Microchip
MPN: PIC16LF1559-I/P ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.45 | $2.45 |
| 10 | $2.18 | $21.80 |
| 100 | $1.92 | $192.00 |
| 500 | $1.71 | $855.00 |
| 1,000 | $1.55 | $1,550.00 |
PIC16LF1559-I/P Overview
An 8-bit microcontroller (MCU) is a small, self-contained computer-on-a-chip that integrates a CPU, program memory (Flash), data memory (RAM), and peripherals such as ADCs, timers, and communication interfaces into a single silicon die. The PIC16LF1559 belongs to the broader PIC® 16F family, sitting under the enhanced mid-range core family in Microchip's taxonomy (MCU -> 8-bit MCU -> PIC16 -> XLP -> mTouch capable). It is purpose-built for capacitive touch (mTouch®) and general-purpose sensing designs.
Key differentiating features include two independent 10-bit ADCs with automated hardware CVD (Capacitive Voltage Divider) modules connecting to up to 17 analog channels, supporting a combined sampling throughput of 600k samples/second. The device integrates two PWM modules, multiple communication peripherals, and 17 I/O pins. Its hardware CVD engine enables robust touch and proximity detection without software overhead, while the 14KB flash and 512B RAM balance code density with low power consumption.
Architecturally, the PIC16LF1559 uses Microchip's enhanced mid-range core with a single-cycle instruction execution at 125ns, providing deterministic interrupt response. The two independent ADC cores (rather than a multiplexed single ADC) allow simultaneous sampling of multiple sensors, which is critical for capacitance-ratio touch sensing applications where reference-vs-sensor phase relationships matter.
Typical applications include capacitive touch keypads, mTouch® proximity and slider interfaces, multi-channel sensor front ends, low-power IoT sensor nodes, and general-purpose 8-bit embedded control in consumer appliances and industrial user interfaces. The combination of dual ADCs with hardware CVD and XLP low-power features makes it especially well suited for battery-powered human-interface devices.
Designers should note that the 20-pin PDIP variant (I/P) is a through-hole package suited for prototyping and hobby projects, while SSOP and QFN surface-mount variants (I/SS, I/GZ) exist in the same PIC16LF1559 family for production volumes. When porting code, ensure the selected variant matches your pinout and ADC channel count requirements.
This page synthesizes distributor pricing, drop-in XA alternatives within the same PIC16LF1559 family, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC16LF1559-I/P — 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 PIC16LF1559-I/P (same form factor and footprint) — differing in ADC, Package, Core Architecture, Operating Temperature, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF1559-I/SS
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.59 / Unit
View Datasheet →PIC16LF1559-I/GZ
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
PIC16LF1559-E/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF1559T-I/SS
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.28 / Unit
View Datasheet →PIC16LF1554-I/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF1559-E/ML
✅ Drop-In✓ In Stock
$1.05 / Unit
View Datasheet →PIC16LF1559T-I/SS
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.28 / Unit
View Datasheet →PIC16LF1559-I/P Maximum Ratings & Electrical Characteristics
| Product Type | 8-bit Microcontroller (MCU) |
| Core Architecture | PIC16 enhanced mid-range |
| Program Memory (Flash) | 14 KB (8K x 14 words) |
| Data Memory (RAM) | 512 bytes |
| Maximum CPU Speed | 32 MHz |
| Instruction Execution | 125 ns (single-cycle) |
| Supply Voltage (VDD) | 1.8 V to 3.6 V |
| ADC | 2x 10-bit ADCs with hardware CVD |
| Analog Channels | 17 |
| Combined ADC Sampling Rate | 600k samples/second |
| PWM Modules | 2 |
| I/O Pins | 17 |
| Package | 20-pin PDIP (0.300 in / 7.62 mm) |
| Mounting Type | Through-Hole (DIP) |
| Operating Temperature | -40C to +85C (industrial) |
| Technology Family | PIC® XLP™ 16F |
| Touch Feature | mTouch® with hardware CVD |
| Low Power Technology | XLP (eXtreme Low Power) |
| RoHS Status | Compliant |
PIC16LF1559-I/P Pin Configuration
| Pin 1 | /MCLR/VPP — Master Clear (reset) input / programming voltage |
| Pin 2 | RA0/AN0/CVDREF — PORTA bit 0 / Analog input 0 / CVD reference |
| Pin 3 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| Pin 4 | RA2/AN2 — PORTA bit 2 / Analog input 2 |
| Pin 5 | RA3/AN3 — PORTA bit 3 / Analog input 3 |
| Pin 6 | RA4/AN4 — PORTA bit 4 / Analog input 4 |
| Pin 7 | RA5/AN5 — PORTA bit 5 / Analog input 5 |
| Pin 8 | VSS — Ground reference |
| Pin 9 | RA7/OSC1 — PORTA bit 7 / oscillator input |
| Pin 10 | RA6/OSC2 — PORTA bit 6 / oscillator output |
| Pin 11 | RC0 — PORTC bit 0 |
| Pin 12 | RC1 — PORTC bit 1 |
| Pin 13 | RC2 — PORTC bit 2 |
| Pin 14 | RC3 — PORTC bit 3 |
| Pin 15 | RC4 — PORTC bit 4 |
| Pin 16 | RC5 — PORTC bit 5 |
| Pin 17 | RC6 — PORTC bit 6 |
| Pin 18 | RC7 — PORTC bit 7 |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VDD — Positive supply voltage |
Typical Applications
PIC16LF1559-I/P is suitable for 6 applications: Capacitive Touch Keypads (mTouch), Proximity and Slider Sensors, Multi-Channel Sensor Front End, Low-Power IoT Sensor Nodes, Consumer Appliance User Interfaces, General-Purpose 8-bit Embedded Control.
Capacitive Touch Keypads (mTouch)
The PIC16LF1559-I/P is purpose-built for mTouch® capacitive touch keypads thanks to its two 10-bit ADCs with automated hardware CVD (Capacitive Voltage Divider). The CVD module performs charge-and-share phase measurements between sensor and reference capacitors without software intervention, giving stable readings even in the presence of moisture or noise. With 17 analog channels, the MCU supports up to a 17-key matrix plus a guard sensor. Placed directly on the touch-panel PCB with the sensor pads routed to analog inputs, it eliminates external touch ICs. Its 14 KB flash allows full GUI button logic plus I2C/SPI master status reporting to a host processor; XLP keeps idle current below 1 uA so coin-cell powered remote controls last years.
Recommended
Proximity and Slider Sensors
The PIC16LF1559-I/P hardware CVD engine enables reliable proximity detection and linear/proximity slider implementations by comparing phase-shifted ADC samples against a reference capacitor. Designers can route a long PCB track as the slider sensor and use the dual ADCs to capture both endpoints simultaneously, eliminating software skew. The 32 MHz enhanced mid-range core processes 600k samples/sec aggregate, giving sub-cm positional resolution on sliders. Industrial temperature rating (-40C to +85C) supports outdoor and appliance installations, while XLP sleep modes enable proximity-activated wakeup from microamp standby. The 14 KB flash comfortably fits Microchip's mTouch library plus application logic for LED feedback and host reporting.
Recommended
Multi-Channel Sensor Front End
For sensor-aggregation nodes, the PIC16LF1559-I/P delivers 17 analog inputs through two independent 10-bit ADCs that can sample concurrently, achieving a combined 600k samples/sec throughput. This dual-ADC architecture eliminates the input-multiplexer bottleneck seen on single-ADC MCUs when measuring multiple sensors at the same instant. Typical use cases include strain-gauge bridges, photodiode arrays, NTC thermistor scanning, and process-control loops. The 1.8V-3.6V supply range lets it run from a single Li-ion cell or 3.3V regulated rail, while XLP nanoamp sleep extends battery life in duty-cycled field sensors. 512 B RAM and 14 KB flash are sufficient for calibration constants and modest protocol stacks (Modbus RTU, MQTT-SN).
Recommended
Low-Power IoT Sensor Nodes
XLP (eXtreme Low Power) technology combined with hardware-CVD-driven wake events makes the PIC16LF1559-I/P an excellent MCU for duty-cycled IoT sensor nodes. In deep sleep, the device draws nanoamp currents while still being able to wake on capacitive-touch events or ADC thresholds. A typical design wakes every few seconds to capture sensor data, transmits over UART or SPI to a connected radio module, and returns to sleep. The wide 1.8V-3.6V supply range supports direct connection to 2x AA alkaline, CR2032 coin cells, or regulated Li-ion rails. Industrial temperature range enables outdoor and industrial-IoT deployment in metering, agriculture, and HVAC sensor applications.
Recommended
Consumer Appliance User Interfaces
Modern consumer appliances - microwaves, washing machines, induction cooktops, smart thermostats - increasingly use capacitive touch instead of mechanical buttons for sleek, sealed front panels. The PIC16LF1559-I/P's 17-channel mTouch® hardware CVD implementation is precisely matched to this requirement, supporting the touch matrix plus a proximity wake-up sensor that turns on the display when a hand approaches. Its dual ADC cores capture multiple slider/wheel positions simultaneously for smooth rotary control. The 14 KB flash fits Microchip's proven mTouch library plus custom UI state machines, and the industrial temperature grade handles the thermal environment inside an appliance cabinet. Using a single-chip solution reduces BOM and PCB area versus a discrete touch controller plus main MCU.
Recommended
General-Purpose 8-bit Embedded Control
Beyond touch, the PIC16LF1559-I/P is a competent general-purpose 8-bit MCU for cost-sensitive embedded designs. The enhanced mid-range core delivers 32 MHz / 125 ns single-cycle instruction execution across 49 instructions, with deterministic interrupt response ideal for time-critical control loops. Two PWM modules, I2C/SPI/EUSART peripherals, 17 GPIO, plus the dual ADC architecture make it suitable for small motor control, LED drivers, fan controllers, and simple closed-loop regulators. The 20-pin PDIP package remains popular for prototypes, educational kits, hobby projects, and low-volume specialty products where through-hole soldering and breadboard compatibility outweigh the smaller form factor of surface-mount variants.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF1559-I/P — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF1559-I/SS | PIC16LF1559-I/GZ | PIC16LF1559-E/P | PIC16LF1559-E/ML | PIC16LF1554-I/P |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-pin PDIP (through-hole) | 20-pin SSOP (surface-mount) | 20-pin UQFN (surface-mount) | 20-pin PDIP (through-hole) - same | 20-pin QFN (surface-mount) | 20-pin PDIP (through-hole) - same |
| Flash Memory | 14 KB | 14 KB - same | 14 KB - same | 14 KB - same | 14 KB - same | 7 KB (-50%) |
| RAM | 512 B | 512 B - same | 512 B - same | 512 B - same | 512 B - same | 256 B (-50%) |
| Maximum CPU Speed | 32 MHz | 32 MHz - same | 32 MHz - same | 32 MHz - same | 32 MHz - same | 32 MHz - same |
| ADC Channels | 17 | 17 - same | 17 - same | 17 - same | 17 - same | 12 |
| Hardware CVD (mTouch) | Yes (2x 10-bit ADC cores) | Yes - same | Yes - same | Yes - same | Yes - same | Yes - same |
| Operating Temperature | -40C to +85C (industrial) | -40C to +85C - same | -40C to +85C - same | -40C to +125C (extended) | -40C to +125C (extended) | -40C to +85C - same |
| Supply Voltage | 1.8 V to 3.6 V | 1.8 V to 3.6 V - same | 1.8 V to 3.6 V - same | 1.8 V to 3.6 V - same | 1.8 V to 3.6 V - same | 1.8 V to 3.6 V - same |
| PWM Modules | 2 | 2 - same | 2 - same | 2 - same | 2 - same | 2 - same |
Key Differentiators
- Dual 10-bit ADC cores with 600k samples/sec aggregate (vs PIC16LF1509-I/SS)
- Hardware CVD engine for mTouch® without CPU overhead (vs PIC16LF15325-I/P)
- 20-pin PDIP through-hole option for prototyping (vs PIC16LF1559-I/GZ (UQFN-20))
Design Notes
For mTouch® capacitive sensing applications, route the sensor pads on a top-layer copper pour with no soldermask opening, keep sensor traces short and well-guarded by ground, and place a ground ring around each sensor. The PIC16LF1559 hardware CVD module uses the difference between sensor and reference capacitor charge phases, so the analog reference capacitor (typically a fixed COG/NP0 ceramic) must be placed as close as possible to the assigned analog channel pin to minimize parasitic coupling.
Place a 100 nF decoupling capacitor as close as possible to the VDD pin (pin 20) and a bulk capacitor (4.7 uF or larger) on the same VDD net. The PIC16LF1559-I/P operates from 1.8V to 3.6V; for designs powered directly from a 3.3V rail, the on-chip POR and BOR provide sufficient brownout protection. When designing for coin-cell operation, the XLP sleep current of ~nanoamps dominates - measured deeper than 100 nA in deep sleep per Microchip datasheet document 40001761F.
Estimated: At 32 MHz the core draws ~3 mA active / ~5 nA sleep per the datasheet - expected battery life from a 220 mAh CR2032 with 1% duty cycle is around 7+ years. Avoid configuring unused analog pins as digital outputs - the PIC16LF1559's analog channels default to analog mode after reset; explicitly disable the ADC on unused channels (ANSEL register) to prevent floating-input quiescent current draw. Always verify the ICSP /MCLR pull-up resistor (typically 10 kOhm) is correctly fitted, otherwise in-circuit debug will not connect reliably.
Compliance Information
RoHS and lead-free per Microchip product page verified 2026-09-23. Industrial temperature grade -40C to +85C. For AEC-Q100 automotive applications, Microchip offers dedicated automotive-grade PIC16F equivalents in the PIC16F1559 family; consult Microchip for automotive part numbers.
