PIC16F1946-I/PT Microchip Integrated Circuit (Quad Flat Packages) In Stock
Microchip PIC16F1946 is an 8-bit PIC16 microcontroller with 14 KB Flash, 1 KB RAM, 55 I/O pins, 12-channel 10-bit ADC, and EUSART/SPI/I2C, running at up to 32 MHz from 2.3 V to 5.5 V in a TQFP-64 package. From $3.20 in stock worldwide shipping.
- Manufacturer
- Microchip
- Package
- Quad Flat Packages
- Pin Count
- 64
- Lifecycle
- ACTIVE
- Datasheet
- PIC16F1946-I/PT Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 55 digital I/O pins in a TQFP-64 package deliver the highest GPIO density among 8-bit PIC16 devices, eliminating I/O expander ICs in keyboard-scanning, relay-driving, and multi-LED display designs
- 32 MHz internal oscillator with 4x PLL and 2.3 V minimum supply at 16 MHz enables low-power operation from Li-ion cells while maintaining real-time communication throughput
- Dual EUSART ports supporting asynchronous UART and synchronous SPI/I2C up to 8 Mbps allow concurrent multi-protocol communication with display controllers, sensors, and host processors
Applications
The PIC16F1946 targets industrial HMI panels, building automation controllers, and multi-zone HVAC systems where 55 I/O lines, dual UART ports, and a 12-channel ADC must coexist on a single 8-bit device running at 32 MHz from a 3.3 V or 5 V rail. Its 14 KB Flash provides adequate code space for MODBUS RTU firmware, LED segment display drivers, and keypad debounce routines simultaneously without external code storage. Consumer appliances such as laundry machine controllers and smart power strips also rely on its high I/O count and wide 2.3 V to 5.5 V supply range to interface relays, indicators, and user buttons in a single-board design.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | TQFP-64 |
| Factory Lead Time | 1Week |
| YTEOL | 8 |
| Has ADC | YES |
| Additional Feature | OPERATES WITH 2.3V MIN @ 16 MHZ |
| Bit Size | 8 |
| Boundary Scan | NO |
| CPU Family | PIC16 |
| Clock Frequency-Max | 32MHz |
| DAC Channels | NO |
| DMA Channels | NO |
| Format | FIXED POINT |
| Integrated Cache | NO |
| JESD-30 Code | S-PQFP-G64 |
| JESD-609 Code | e3 |
| Low Power Mode | YES |
| Number of External Interrupts | 1 |
| Number of I/O Lines | 54 |
| Number of Serial I/Os | 2 |
| 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 | TQFP64,.47SQ |
| Package Shape | SQUARE |
| Package Style | FLATPACK, THIN PROFILE, FINE PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| RAM (bytes) | 512 |
| ROM (words) | 14336 |
| ROM Programmability | FLASH |
| Screening Level | TS 16949 |
| Speed | 32MHz |
| Supply Current-Max | 4.1mA |
| Supply Voltage-Max | 5.5V |
| Supply Voltage-Min | 2.5V |
| Supply Voltage-Nom | 3.3V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.5mm |
| 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
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How many I/O pins does the PIC16F1946 provide, and how does that compare to typical 8-bit microcontrollers in a TQFP-64 footprint?
The PIC16F1946 offers 55 configurable digital I/O pins in a 64-lead TQFP package, which is among the highest GPIO densities for 8-bit PIC16 devices, enabling direct connection of 4x16 keyboard matrices, 7-segment LED arrays of up to 8 digits, and 32-relay drive outputs without adding any I2C I/O expander ICs or port multiplexers.
What is the maximum clock speed of the PIC16F1946, and at what supply voltage can it maintain 16 MHz operation?
The PIC16F1946 runs at up to 32 MHz using an internal oscillator with 4x PLL on a 2.5 V to 5.5 V supply, and at a reduced 16 MHz it operates down to 2.3 V minimum, allowing direct powering from a single Li-ion cell at end-of-discharge without any boost converter while maintaining UART and ADC functionality.
How many ADC channels and what resolution does the PIC16F1946 support for multi-sensor measurement tasks?
The PIC16F1946 integrates a 12-channel, 10-bit successive-approximation ADC with a conversion time of approximately 5 µs at 32 MHz, supporting simultaneous multiplexed sampling of up to 12 analog inputs such as 4-to-20 mA current-loop sensors, NTC thermistors, and 0-to-5 V pressure transducers in a single 2.3 V to 5.5 V supply industrial design.
Which serial communication interfaces are integrated in the PIC16F1946, and can two independent UART channels be active at the same time?
The PIC16F1946 includes 2 enhanced USART (EUSART) modules each operating asynchronously at up to 2 Mbps baud rate or synchronously at up to 8 Mbps SPI clock, allowing simultaneous MODBUS RTU on EUSART1 at 115200 bps and a display controller link on EUSART2 at 1 Mbps without software arbitration or bus sharing.
For a multi-zone HVAC controller PCB, how does the TQFP-64 package of the PIC16F1946-I/PT simplify the board design?
The TQFP-64 body measures 10 mm x 10 mm with 0.5 mm lead pitch, placing 55 I/O signals on a single IC footprint of approximately 100 mm² and routing all relay, sensor, and communication signals within a 60 mm x 60 mm single-layer control board, versus a 40-pin DIP alternative that would require 2 or 3 I/O expander chips plus their decoupling and interconnect adding 50 mm² each.
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