PIC16LF1933T-I/ML - 8-Bit XLP MCU, 7KB Flash, 28-QFN | Microchip
MPN: PIC16LF1933T-I/ML ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.4 | $3.40 |
| 10 | $3.06 | $30.60 |
| 100 | $2.72 | $272.00 |
| 500 | $2.44 | $1,220.00 |
| 1,000 | $2.18 | $2,180.00 |
PIC16LF1933T-I/ML Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, data RAM, and peripheral interfaces. The PIC16LF1933 belongs to the 8-bit MCU class within the broader embedded controller taxonomy: 8-bit MCU -> PIC microcontroller -> Microchip PIC16 family -> power-managed industrial/consumer MCU. Within that hierarchy, the "LF" prefix denotes the wide-voltage low-power variant, while "XLP" (nanoWatt eXtreme Low Power) further optimizes sleep current for battery-powered designs.
Key features include 49 instructions with 16 stack levels, self-programming Flash, an internal 32 MHz oscillator, multiple low-power sleep modes down to sub-microamp currents, and the integrated mTouch capacitive sensing peripheral. Compared to discrete designs, this integration eliminates external ADCs, PWM ICs, and LCD driver chips, reducing BOM cost and PCB area while preserving analog performance.
Typical applications include battery-powered sensor nodes, human-machine interface panels with LCD, low-end consumer appliances, capacitive-touch user input, and industrial control loops. The wide 1.8-5.5 V supply enables direct connection to single-cell Li-ion, 3.3 V system rails, or 5 V regulated buses.
When designing with the PIC16LF1933, plan for ICD/ICSP header access for in-circuit debug and programming, observe decoupling capacitor placement near VDD pins, and budget current consumption across active, idle, and sleep modes. The integrated LCD driver requires the charge pump or resistor ladder configuration to be selected via configuration fuses; verify your segment count and bias requirements before finalizing the BOM. This page consolidates distributor pricing, drop-in alternatives, and practical design notes that the manufacturer datasheet alone does not provide.
Drop-in alternatives for PIC16LF1933T-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 PIC16LF1933T-I/ML (same form factor and footprint) — differing in Package, LCD Driver, ADC, I/O Pins, Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF1933-I/ML
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.55 / Unit
View Datasheet →PIC16F1933T-I/ML
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC16LF1933-I/SO
✅ Drop-In✓ In Stock
$0.92 / Unit
View Datasheet →PIC16LF1933-I/SS
✅ Drop-In✓ In Stock
$1.3 / Unit
View Datasheet →PIC16LF1933-I/MV
✅ Drop-In✓ In Stock
$1.45 / Unit
View Datasheet →PIC16LF1902-I/ML
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.05 / Unit
View Datasheet →PIC16LF18855-I/ML
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC16LF1933T-I/ML Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC16 Enhanced Mid-Range 8-bit |
| Program Memory (Flash) | 7 KB (4K x 14 words) |
| Data SRAM | 256 bytes |
| Data EEPROM | 256 bytes |
| Maximum CPU Frequency | 32 MHz |
| Operating Voltage | 1.8 V to 5.5 V |
| I/O Pins | 25 |
| ADC | 10-bit, 17 channels |
| Comparators | 2 |
| PWM Modules | 3 ECCP + 2 CCP |
| Communication | 1x EUSART (auto-baud), 1x MSSP (SPI/I2C) |
| LCD Driver | Up to 60 segments |
| mTouch Capacitive Sensing | Integrated |
| Temperature Indicator | Internal |
| Package | 28-QFN (6x6 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (Industrial) |
| Instruction Set | 49 instructions, 16 stack levels |
| Low-Power Technology | nanoWatt XLP |
| RoHS Status | Compliant |
PIC16LF1933T-I/ML Pin Configuration
| Pin 1 | VDD — Positive supply voltage |
| Pin 2 | RA5 — Bidirectional I/O pin |
| Pin 3 | RA4 — Bidirectional I/O pin |
| Pin 4 | RA3 — Bidirectional I/O pin |
| Pin 5 | RC5 — Bidirectional I/O pin |
| Pin 6 | RC4 — Bidirectional I/O pin |
| Pin 7 | RC3 — Bidirectional I/O pin |
| Pin 8 | RC6 — Bidirectional I/O pin |
| Pin 9 | RC7 — Bidirectional I/O pin |
| Pin 10 | RB7 — Bidirectional I/O pin |
| Pin 11 | RB6 — Bidirectional I/O pin |
| Pin 12 | VSS — Ground reference |
| Pin 13 | VSS — Ground reference |
| Pin 14 | RB5 — Bidirectional I/O pin |
| Pin 15 | RB4 — Bidirectional I/O pin |
| Pin 16 | RB3 — Bidirectional I/O pin |
| Pin 17 | RB2 — Bidirectional I/O pin |
| Pin 18 | RB1 — Bidirectional I/O pin |
| Pin 19 | RB0 — Bidirectional I/O pin |
| Pin 20 | VDD — Positive supply voltage |
| Pin 21 | RA7 — Bidirectional I/O pin |
| Pin 22 | RA6 — Bidirectional I/O pin |
| Pin 23 | RA1 — Bidirectional I/O pin |
| Pin 24 | RA0 — Bidirectional I/O pin |
| Pin 25 | RC2 — Bidirectional I/O pin |
| Pin 26 | RC1 — Bidirectional I/O pin |
| Pin 27 | RC0 — Bidirectional I/O pin |
| Pin 28 | EP — Exposed thermal pad (connect to VSS) |
Typical Applications
PIC16LF1933T-I/ML is suitable for 7 applications: Battery-Powered IoT Sensor Node, LCD User Interface Panel, Capacitive Touch User Input, Low-End Consumer Appliance Control, Industrial Sensor Transmitter, LED Lighting Controller, Educational / Maker Development Board.
Battery-Powered IoT Sensor Node
The PIC16LF1933T-I/ML is well-suited for battery-powered IoT sensor nodes thanks to its nanoWatt XLP technology with sub-microamp sleep currents and 1.8 V minimum supply. Its 7 KB Flash accommodates lightweight sensor-fusion firmware while the integrated 10-bit ADC reads analog sensor outputs directly. EUSART with auto-baud supports UART-connected radios or RS-485 buses, and the 32 MHz CPU enables real-time sampling. With typical sleep currents under 1 uA, a single CR2032 coin cell can power the node for years. The 28-QFN (6x6 mm) footprint is small enough for wearables or PCB-embedded sensor beacons where board area is constrained.
Recommended
LCD User Interface Panel
The PIC16LF1933T-I/ML directly drives up to 60-segment LCD glass without an external driver IC, cutting BOM cost and PCB area. Its 32 MHz CPU and 7 KB Flash handle button debouncing, segment multiplex routines, and menu navigation. Built-in mTouch replaces mechanical buttons with capacitive sliders or wheels behind the bezel. The EUSART connects to a host controller for telemetry, while the ADC samples backlight temperature for compensation. Designers can run the LCD charge pump off the 1.8-5.5 V supply and reuse the same firmware across 3.3 V and 5 V product variants.
Recommended
Capacitive Touch User Input
The integrated mTouch peripheral makes the PIC16LF1933T-I/ML a strong fit for sealed-button and slider panels where mechanical switches are not desired. The CTMU-based charge-time measurement supports up to 17 touch channels through the ADC, with hardware-driven scanning that offloads the CPU. Combined with the LCD driver, designers can build all-in-one touch-and-display modules for appliances, security keypads, and consumer gadgets. The industrial -40C to +85C temperature range supports outdoor or garage installations, and the 1.8 V minimum rail simplifies battery-backed wireless remotes.
Recommended
Low-End Consumer Appliance Control
Small kitchen and home appliances (rice cookers, induction cooktops, fans, coffee machines) benefit from the PIC16LF1933T-I/ML's combination of mTouch buttons, LCD readout, ADC sensor inputs, and 5 PWM outputs for motor or heater control. Its 32 MHz CPU executes triac-fired AC zero-cross detection and PID temperature control loops in real time. The wide 1.8-5.5 V supply accepts USB-powered designs and traditional rectified mains-aux rails alike. The 28-QFN (6x6 mm) is well matched to compact PCBAs behind an appliance control panel.
Recommended
Industrial Sensor Transmitter
For 4-20 mA loop-powered or 24 V industrial sensor transmitters, the PIC16LF1933T-I/ML delivers reliable performance with 10-bit ADC accuracy, dual comparators for threshold detection, and EUSART for HART or RS-485 modulation. The industrial temperature grade and XLP sleep modes enable continuous 24 V loop operation with energy budget headroom. Five PWM channels drive valve or buzzer outputs, and the integrated temperature indicator provides on-chip cold-junction compensation. The 28-QFN lands easily on the small PCBA inside a field-mount transmitter housing.
Recommended
LED Lighting Controller
The PIC16LF1933T-I/ML drives RGB or tunable-white LED fixtures through its 5 PWM channels with 16-bit resolution when ECCP modules are configured for high-resolution PWM. Designers can implement CCT/Dimming curves, logarithmic dimming, and DMX/RDM or 0-10 V dimming protocols via the EUSART or MSSP. The mTouch peripheral adds capacitive dimming sliders, and the ADC monitors LED temperature and current sense feedback. The 1.8-5.5 V supply works with both 3.3 V and 5 V LED-driver front ends, simplifying driver selection.
Recommended
Educational / Maker Development Board
The PIC16LF1933T-I/ML is a popular choice for educational boards and PIC-based hobby projects thanks to its affordable price, 28-QFN availability on breakout PCBs, and Microchip's MPLAB X IDE + XC8 toolchain support. The 7 KB Flash and integrated peripherals (mTouch, LCD, ADC, PWM, EUSART) provide one part to cover most introductory embedded lessons, from GPIO to interrupt-driven state machines. ICD/ICSP headers enable on-board debug, and the wide voltage tolerance simplifies lab power setups. Microchip's PICDEM LCD 2 demo board (DM163030) supports direct PIM evaluation.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF1933T-I/ML — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF1933-I/ML | PIC16F1933T-I/ML | PIC16LF1902-I/ML | PIC16LF18855-I/ML |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-QFN (6x6) | 28-QFN (6x6) - same | 28-QFN (6x6) - same | 28-QFN (6x6) - same | 28-QFN (6x6) - same |
| Flash Memory | 7 KB | 7 KB | 7 KB | 2 KB | 14 KB |
| SRAM | 256 B | 256 B | 256 B | 128 B | 1 KB |
| Operating Voltage | 1.8-5.5 V | 1.8-5.5 V | 2.3-5.5 V | 1.8-5.5 V | 1.8-5.5 V |
| Maximum CPU Speed | 32 MHz | 32 MHz | 32 MHz | 16 MHz | 32 MHz |
| LCD Driver Segments | Up to 60 | Up to 60 | Up to 60 | Up to 32 | Up to 72 |
| mTouch Sensing | Yes (integrated) | Yes | Yes | Limited | Yes (improved CIPs) |
| PWM Channels | 5 (3 ECCP + 2 CCP) | 5 | 5 | 2 | 5 (16-bit) |
Key Differentiators
- Lower minimum VDD than F variant (vs PIC16F1933T-I/ML)
- Larger memory and more peripherals than cost-down PIC16LF1902 (vs PIC16LF1902-I/ML)
- Mature tooling and demo board support (vs PIC16LF18855-I/ML)
Design Notes
The PIC16LF1933T-I/ML nanoWatt XLP technology offers Sleep currents under 1 uA when properly configured. Disable unused peripherals via PMD (Peripheral Module Disable) registers, switch the system clock to LFINTOSC or SOSC during sleep, and gate sensor power through a GPIO-controlled load switch. Estimated: a sensor node running 1 active ms every 5 s at 32 MHz (1 mA active) and 0.5 uA sleep averages ~0.7 mA, enabling multi-year CR2032 operation.
Place 100 nF + 10 uF decoupling capacitors as close as possible to each VDD/VSS pair (pins 1-12 and pins 20-13 on the 28-QFN). Connect the exposed thermal pad (pin 28) to a grounded copper pour of at least 25 mm^2 for thermal dissipation and noise return. Keep crystal traces short and shield them with a guard ring tied to ground if high-accuracy timing is required.
Do not leave the ICD/ICSP pins (PGD/PGC) floating during design - either route them to a debug header or add 10 kohm pull-downs to ground to prevent spurious Reset entry during power-up. Ensure CONFIG words are explicitly set (especially LVP, WDTE, FOSC selection); default unprogrammed CONFIG1 can leave the part in Low-Voltage Programming mode unintentionally.
For capacitive mTouch designs, route sense traces with minimum 0.5 mm width, 0.5 mm clearance to ground, and avoid running them parallel to noisy digital traces or across the exposed thermal pad. Keep the touch electrode traces shorter than 100 mm to limit susceptibility to noise; add a 100 pF series resistor near the MCU pin to dampen ESD.
Compliance Information
RoHS/REACH compliant per Microchip product page; lead-free terminal finish. Not AEC-Q100 qualified - choose AEC-Q100 graded PIC16F1933 variants for automotive use.
