PIC16LF1939-I/PT Microchip Integrated Circuit (Quad Flat Packages) In Stock
The PIC16LF1939-I/PT is an 8-bit PIC16 microcontroller with 28 KB Flash, 32 MHz clock, integrated ADC and DAC, operating at 2.5–3.3 V in a TQFP-44 package. Designed for low-voltage, low-power embedded control applications.
- Manufacturer
- Microchip
- Package
- Quad Flat Packages
- Pin Count
- 44
- Lifecycle
- ACTIVE
- Datasheet
- PIC16LF1939-I/PT Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $2.0900(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 28 KB Flash program memory with 32 MHz maximum clock provides generous code space and processing speed for complex 8-bit control firmware
- Integrated ADC and DAC channels enable both analog input sensing and programmable analog output in a single low-voltage 2.5–3.3 V device
- TQFP-44 package with 36 I/O pins delivers high connectivity density for designs requiring multiple sensors, actuators, and communication interfaces
Applications
The PIC16LF1939-I/PT is well suited for low-voltage industrial controls, smart metering, and HVAC panels where a 3.3 V rail powers both the MCU and adjacent sensors, taking advantage of built-in ADC and DAC channels to close analog control loops without external conversion ICs. It is also used in portable medical devices and battery-backed data loggers that need 28 KB of firmware space, low active-mode current, and the footprint consistency of a standard 44-pin TQFP package.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | TQFP-44 |
| Factory Lead Time | 6Weeks |
| YTEOL | 8 |
| Has ADC | YES |
| Bit Size | 8 |
| Boundary Scan | NO |
| CPU Family | PIC16 |
| Clock Frequency-Max | 32MHz |
| DAC Channels | YES |
| DMA Channels | NO |
| Format | FIXED POINT |
| Integrated Cache | NO |
| JESD-30 Code | S-PQFP-G44 |
| JESD-609 Code | e3 |
| Low Power Mode | YES |
| Number of External Interrupts | 1 |
| Number of I/O Lines | 36 |
| Number of Serial I/Os | 1 |
| Number of Timers | 8 |
| On Chip Data RAM Width | 8 |
| On Chip Program ROM Width | 14 |
| PWM Channels | YES |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | QFP44,.47SQ,32 |
| Package Shape | SQUARE |
| Package Style | FLATPACK, HEAT SINK/SLUG, THIN PROFILE, FINE PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| RAM (bytes) | 1024 |
| ROM (words) | 16384 |
| ROM Programmability | FLASH |
| Speed | 32MHz |
| Supply Current-Max | 4.6mA |
| Supply Voltage-Max | 3.6V |
| Supply Voltage-Min | 2.5V |
| Supply Voltage-Nom | 3V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.8mm |
| Terminal Position | QUAD |
| Time@Peak Reflow Temperature-Max (s) | 40 |
| uPs/uCs/Peripheral ICs Type | MICROCONTROLLER, RISC |
| Package | Quad Flat Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.31.00.01 |
| Country of Origin | Philippines, Thailand |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How much Flash memory does the PIC16LF1939-I/PT provide, and at what clock frequency does it run?
The PIC16LF1939-I/PT includes 28 KB of Flash program memory and operates at up to 32 MHz, supporting around 8 million instructions per second at full speed. This combination is sufficient for complex state machines, PID controllers, and communication stacks within a single 8-bit device without requiring an external memory expansion.
What supply voltage range does the PIC16LF1939-I/PT require, and how does the 'LF' designation differ from the standard PIC16F1939?
The LF variant operates from 1.8 V to 3.6 V, optimized for 2.5 V and 3.3 V systems, whereas the standard PIC16F1939 supports a wider 2 V to 5.5 V range. The lower maximum voltage of the LF part makes it directly compatible with 3.3 V-only system rails found in ARM-based host boards, cellular modems, and low-power sensor hubs without requiring level translation on the I/O pins.
Which analog peripherals does the PIC16LF1939-I/PT integrate, and how do they reduce external component count?
The device integrates a multi-channel ADC for analog sensor input sampling and at least one DAC channel for generating programmable analog reference or output voltages. Having both converters on-chip eliminates the need for external ADC and DAC ICs in designs such as thermostat controllers, motor-speed regulators, and battery chargers, cutting BOM cost and reducing PCB area in a 44-pin TQFP footprint.
For a battery-powered HVAC controller, what makes the PIC16LF1939-I/PT preferable to an 8-pin PIC alternative?
An 8-pin PIC provides only 5–6 I/O pins, insufficient for a thermostat needing a relay driver, 2-wire display bus, temperature sensor input, setpoint keypad, and serial debug port simultaneously. The TQFP-44 variant offers 36 I/O pins, 28 KB Flash for the full HVAC algorithm, and an internal DAC for analog fan-speed control, all within a 3.3 V supply budget of typically 2–5 mA active current, enabling multi-year AA battery life when combined with sleep modes.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $2.6700 | $2.67 |
| 25+ | $2.6400 | $66.00 |
| 100+ | $2.2700 | $227.00 |
| 1000+ | $2.1800 | $2180.00 |
| 5000+ | $2.0900 | $10450.00 |
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