PIC16F1939-I/PT Microchip Integrated Circuit (Quad Flat Packages) In Stock
Microchip PIC16F1939-I/PT is an 8-bit PIC16 microcontroller with 28 kB Flash, 256 bytes EEPROM, integrated LCD driver, 32 MHz maximum clock, 10-bit ADC, and DAC in a 44-pin TQFP package, operating from 1.8 V to 5.5 V. Ideal for metering, display, and low-power sensing applications. Available in stock with worldwide shipping.
- Manufacturer
- Microchip
- Package
- Quad Flat Packages
- Pin Count
- 44
- Lifecycle
- ACTIVE
- Datasheet
- PIC16F1939-I/PT Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $2.2900(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
- Integrated LCD segment driver eliminates external LCD controller, directly driving up to 4 commons and 40 segments for numeric and symbolic display
- 10-bit ADC with multiple channels and DAC output enables closed-loop analog control from 1.8 V to 5.5 V supply
- 28 kB Flash with 256 bytes EEPROM provides ample code storage and non-volatile parameter retention for metering applications
- 32 MHz internal oscillator with low-power nanoWatt XLP modes enables sub-1 µA sleep current for coin-cell battery designs
Applications
The PIC16F1939-I/PT is designed for energy metering, LCD display panels, and sensor-based instruments that need integrated display drive capability alongside analog measurement functions. Its built-in LCD driver supports 4-multiplex operation, making it suitable for residential water meters, gas meters, and industrial panel meters without additional display driver ICs. The device is also used in portable temperature data loggers, HVAC thermostat controllers, and home automation sensor nodes that require extended battery life using the XLP low-power modes.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | TQFP-44 |
| Factory Lead Time | 2Weeks |
| 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 | 8 |
| 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) | 28672 |
| ROM Programmability | FLASH |
| Speed | 32MHz |
| Supply Current-Max | 4.1mA |
| Supply Voltage-Max | 5.5V |
| 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 3 |
| ECCN | EAR99 |
| HTS Code | 8542.31.00.01 |
| Country of Origin | Philippines, Thailand |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for PIC16F1939-I/PT:
RISC Microcontroller, 8-Bit, FLASH, PIC16 CPU, 32MHz, CMOS, PQFP44
44-pin, 28KB Flash, 2KB RAM, 256 EEPROM, 12-bit DAC, 5-bit DAC, PSMC, OPAmp,
28KB Flash, 2KB RAM, HEF, HS Comp, 10b DAC, OpAmp, COG, ZCD, PRG, 100mA I/Os
44-pin, 7KB Flash, 256B RAM, 256B EEPROM, LCD, 1.8-3.6V, LOW POWER
RISC Microcontroller, 8-Bit, FLASH, PIC16 CPU, 32MHz, CMOS, PQFP44
28KB, 2KB RAM, 38x I/O, 4xPWMs, Comp, DAC, ADC, CWG, 2xEUSART, 2xSPI/I2C
Frequently Asked Questions
How many LCD segments can PIC16F1939-I/PT drive directly without an external LCD controller?
The PIC16F1939-I/PT integrates an LCD driver module supporting up to 4 common lines and 40 segment lines, enabling direct drive of up to 160 pixels in 4-multiplex mode. This covers a 4-digit 7-segment display with decimal points and additional symbols, sufficient for residential utility meter readouts, thermostat displays, and industrial panel indicators without any external LCD driver ICs or additional PCB area.
What is the minimum supply voltage for PIC16F1939-I/PT and how does this benefit battery-powered meter designs?
The PIC16F1939-I/PT operates from as low as 1.8 V supply, enabling direct operation from a single lithium coin cell at end-of-life (typically 2.0 V) or two AA cells in series. Combined with nanoWatt XLP sleep currents below 1 µA, a 1000 mAh lithium battery can power the device in sleep mode with periodic ADC wake-up for more than 10 years, making it suitable for residential utility meters requiring decade-long battery service intervals.
How does PIC16F1939-I/PT's DAC output complement the 10-bit ADC for closed-loop control applications?
The PIC16F1939-I/PT includes a 5-bit voltage-reference DAC that generates a programmable threshold between VSS and VDD. This DAC output can feed directly into the on-chip comparator, creating a software-adjustable analog comparator threshold without external resistor networks. In a temperature controller application, the firmware sets the DAC to a 32-step reference corresponding to a target temperature setpoint, and the comparator triggers an interrupt when the ADC-measured sensor voltage crosses that threshold.
When is PIC16F1939-I/PT a better fit than PIC16F1938 for a 44-pin energy meter design?
The PIC16F1939-I/PT offers 28 kB Flash versus PIC16F1938's 14 kB Flash in the same TQFP-44 package, making it the preferred choice when the application firmware exceeds 14 kB — for example, when adding a MODBUS RTU communication stack alongside the metering and LCD display code. Both devices share the same 1.8 V to 5.5 V supply range, 10-bit ADC, integrated LCD driver, and 32 MHz maximum clock, so the 1939 variant is a direct drop-in upgrade for firmware-constrained designs.
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