PIC16F1946T-I/MR - 14KB Flash 8-Bit MCU LCD Driver | Microchip
부품 번호: PIC16F1946T-I/MR ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $3.45 | $3.45 |
| 10 | $3.1 | $31.00 |
| 100 | $2.76 | $276.00 |
| 500 | $2.48 | $1,240.00 |
| 1,000 | $2.21 | $2,210.00 |
PIC16F1946T-I/MR 개요
A microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, working RAM, and a rich set of peripheral interfaces into one package. In the wider semiconductor taxonomy this part sits under 8-bit MCU -> microcontroller -> embedded processor -> integrated circuit. The PIC16F family adds Microchip's nanoWatt XLP technology, a category of sleep currents below 1 uA in deep-sleep modes, which makes PIC16F1946 particularly suitable for battery-powered human-machine interface (HMI) products.
Key differentiating features include the on-chip segmented LCD driver (up to 192 segments at 1/4 duty, 1/3 bias), a 10-bit ADC with up to 17 channels, two 8-bit timers plus one 16-bit timer, two CCP modules, an MSSP (SPI/I2C) and an enhanced USART, plus a charge time measurement unit (CTMU) for capacitive touch sensing. The 32 MHz internal oscillator eliminates the external crystal in many designs, reducing BOM cost. The nanoWatt XLP sleep current (typically < 60 nA in sleep mode with LCD off) extends battery life in always-on metering and remote-control products.
The architecture is a Harvard RISC core with a 14-bit instruction word and a single-cycle ALU, giving predictable deterministic execution well suited to deterministic control loops and interrupt-driven firmware. The LCD charge-pump and bias generator are on-chip, so designers need only the segment and common-panel capacitors and the glass itself. Internal phase-locked loops multiply the 16 MHz HFINTOSC up to the 32 MHz system clock with software-selectable postscalers, allowing dynamic power tuning.
Typical applications include white-good user interfaces (washing machines, microwave ovens, induction cookers), smart thermostats and HVAC control panels, blood-pressure monitors and other medical home-care devices, electricity-meter LCDs, point-of-sale terminals, and any portable product that combines an LCD with battery operation. The wide 2.3-5.5 V range accepts 2xAA, 3xAA, lithium coin, or regulated 5 V rails without level shifters.
When designing with this part, place a 0.1 uF ceramic decoupling capacitor on every VDD/AVDD/VBAT pin pair as close to the package as possible, tie the MCLR pin to VDD through a 10 kohm resistor with a 100 nF cap to ground for safe in-circuit serial programming, and follow the QFN-64 thermal-pad soldering recommendations (4 to 6 thermal vias under the e-pad) for reliable production. The LCD bias-network capacitors should be ceramic X7R with a value matching the chosen bias configuration in the datasheet.
This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes that complement (but do not replace) the manufacturer datasheet.
드롭인 대체품: PIC16F1946T-I/MR — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: PIC16F1946T-I/MR (동일 폼 팩터 및 풋프린트) — 차이점: Package, Communication, LCD Driver, Operating Temperature, Timers.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
PIC16F1946-I/MR
✅ 드롭인✓ 재고 있음
$2.15 / 개
데이터시트 보기 →PIC16F1947-I/MR
✅ 드롭인✓ 재고 있음
$2.55 / 개
데이터시트 보기 →PIC16F1939-I/PT
✅ 드롭인✓ 재고 있음
$3.42 / 개
데이터시트 보기 →PIC16F1946-E/PT
✅ 드롭인✓ 재고 있음
$2.7 / 개
데이터시트 보기 →PIC16F1946T-I/MR 최대 정격 & 전기적 특성
| Program Memory Type | Flash (self-programmable) |
| Program Memory Size | 14 KB |
| Data RAM | 512 B |
| Data EEPROM | 256 B |
| CPU | 8-bit PIC16 RISC, 14-bit instruction word |
| Maximum CPU Clock | 32 MHz |
| Supply Voltage (VDD) | 2.3 V to 5.5 V |
| I/O Pins | 54 (maximum, package-dependent) |
| ADC | 10-bit, up to 17 channels |
| Timers | Two 8-bit + one 16-bit |
| CCP Modules | 2 |
| Communication | 1x MSSP (SPI/I2C), 1x Enhanced USART |
| LCD Driver | Up to 192 segments, integrated charge pump |
| nanoWatt XLP Sleep Current | < 60 nA typical (sleep mode, LCD off) |
| 동작 온도 | -40C to +85C (Industrial) |
| 패키지 | QFN-64 (MR), 8x8 mm with exposed pad |
| 실장 유형 | Surface Mount |
| RoHS 상태 | Compliant |
| MSL 레벨 | 3 |
PIC16F1946T-I/MR qfn-64 (mr), 8x8 mm with exposed pad 핀 구성 가이드
PIC16F1946T-I/MR(qfn-64 (mr), 8x8 mm with exposed pad 패키지)의 핀 구성입니다. 이 디지털 IC에는 GPIO, 통신 인터페이스(UART, SPI, I2C), 전원 핀이 포함되어 있습니다. 대체 핀 기능과 구성 옵션은 제조사 데이터시트를 참조하십시오. 임베디드 시스템 설계와 PCB 레이아웃에 필수적입니다.
다음에 대한 상세 핀아웃 데이터 없음: PIC16F1946T-I/MR.
다음을 참조하십시오: 데이터시트 전체 핀 구성은 다음을 참조하십시오.
일반적인 애플리케이션
PIC16F1946T-I/MR 적합 용도: 6 애플리케이션s: White-Good HMI Panel, Smart Thermostat and HVAC Controller, Home Blood-Pressure Monitor, Single-Phase Electricity Meter with LCD, POS Terminal and Barcode Scanner, Portable Cooking Thermometer.
White-Good HMI Panel
The PIC16F1946T-I/MR is well suited for washing-machine, microwave, and induction-cooker user interfaces. Its integrated LCD driver supports up to 192 segments, removing the need for an external segment driver, and the on-chip charge pump generates the LCD bias voltage directly from a single 5 V rail, cutting BOM cost. The nanoWatt XLP sleep current keeps standby power below the 1 W Energy Star threshold for always-on appliances. Place the QFN-64 with thermal-via stitching under the exposed pad for reliable reflow, and route the segment lines directly to the LCD glass through short, parallel traces to minimise cross-talk. A typical firmware loop runs the main UI on a 16 MHz HFINTOSC tick and lets the charge pump refresh the LCD autonomously during sleep.
추천
Smart Thermostat and HVAC Controller
In wall-mount thermostats the PIC16F1946T-I/MR provides the LCD panel, the 10-bit ADC for temperature sensing, and the capacitive-touch CTMU for capacitive buttons in a single chip. The 2.3-5.5 V supply accepts 24 VAC-derived rails after rectification, and the integrated USART and MSSP drive the Wi-Fi/BLE module and the HVAC control bus. With the LCD running at 1/4 duty and the CPU in sleep, total quiescent current stays below 30 uA so two AA cells can back up the clock during power loss. Designers should reserve one timer for the PWM-driven triac control, and use the ADC's internal 1.024 V reference for ratiometric thermistor measurements.
추천
Home Blood-Pressure Monitor
For medical home-care devices, the PIC16F1946T-I/MR combines the segmented LCD for systolic/diastolic/pulse display, a 10-bit ADC for the pressure sensor, and nanoWatt XLP sleep for long battery life between measurements. The on-chip CTMU drives a tactile button matrix without external resistors, and the MSSP (I2C) interfaces to the digital pressure transducer. The 32 MHz internal oscillator removes the external crystal, allowing a single-PCB construction that fits the meter housing. Validate IEC 60601-1-2 EMI margins on the LCD segment lines, and use the charge pump in bypass mode at low temperature to keep the LCD contrast stable.
추천
Single-Phase Electricity Meter with LCD
The PIC16F1946T-I/MR runs the meter's LCD, the energy-measurement loop and the optical port in a single chip. The integrated 32 MHz oscillator and the 10-bit ADC sample the shunt or current transformer at 4 kS/s, while the LCD driver displays kWh, voltage and time on up to 192 segments. The MSSP supports the IEC 62056-21 optical interface, and the nanoWatt XLP sleep holds RTC and LCD while idle. Use the internal voltage reference (1.024 V) for the ADC and calibrate the metrology loop against the 50/60 Hz line frequency measured through the zero-cross detector on the comparator.
추천
POS Terminal and Barcode Scanner
Portable point-of-sale terminals benefit from the PIC16F1946T-I/MR's LCD driver for the operator display, its 32 MHz core for real-time serial protocols, and the XLP sleep current for shift-long battery runtime. The enhanced USART drives the barcode scanner and receipt printer, while the MSSP (SPI) talks to the secure element or NFC reader. With 54 I/O available, designers can add keypad scanning, audio feedback, and battery monitoring without an I/O expander. Use the 16-bit timer to debounce the keypad matrix and the CTMU to detect the operator's presence on the touch keypad.
추천
Portable Cooking Thermometer
Battery-powered wireless cooking thermometers use the PIC16F1946T-I/MR to drive a small LCD showing the probe temperature, read the NTC thermistor via the 10-bit ADC, and transmit over a low-power RF module connected to the EUSART. The nanoWatt XLP sleep current allows months of standby on a single CR2032 coin cell, and the on-chip temperature indicator removes the need for an external temperature sensor for cold-junction compensation. Implement the ADC reading as a periodic wake-up using the WDT, then return to sleep after transmitting, which keeps the average current below 5 uA in typical use.
추천
추천 제품 요약
엔지니어링 참조 데이터: PIC16F1946T-I/MR — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | PIC16F1946-I/MR | PIC16F1947-I/MR | PIC16F1939-I/PT | PIC16F1946-E/PT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | QFN-64 (MR), 8x8 mm | QFN-64 (MR), 8x8 mm - same | QFN-64 (MR), 8x8 mm - same | QFN-64 (MR), 8x8 mm - same | QFN-64 (MR), 8x8 mm - same |
| Program Flash | 14 KB | 14 KB | 28 KB | 28 KB | 14 KB |
| Data RAM | 512 B | 512 B | 1 KB | 1 KB | 512 B |
| Data EEPROM | 256 B | 256 B | 256 B | 256 B | 256 B |
| Maximum CPU Clock | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +125C (extended) |
| nanoWatt XLP Sleep | Yes (<60 nA typical) | Yes (<60 nA typical) | Yes (<60 nA typical) | No (older nanoWatt, ~1 uA) | Yes (<60 nA typical) |
| LCD Segments (max) | 192 | 192 | 192 | 192 | 192 |
주요 차별점
- nanoWatt XLP deep-sleep current below 60 nA (vs PIC16F1939-I/PT)
- Same QFN-64 footprint extends in-family without PCB rework (vs PIC16F1947-I/MR)
- Same die in tray packaging for production (vs PIC16F1946-I/MR)
- Extended temperature grade on identical footprint (vs PIC16F1946-E/PT)
설계 노트
Decouple every VDD pin pair with a 100 nF X7R ceramic placed within 2 mm of the package, and add a single bulk 10 uF tantalum or ceramic at the regulator output. The PIC16F1946T-I/MR integrates an LCD charge pump that draws brief peak currents when refreshing pixels, so the bulk cap should be sized to keep VDD ripple below 50 mV. Tie all unused I/O to VDD or VSS through the internal weak pull-up or directly, and configure them as outputs low to minimise sleep current.
Estimated: At 32 MHz CPU clock and VDD 3.3 V, the active current is about 5.5 mA giving a dissipation of approximately 18 mW. With QFN-64 theta_JA of around 30 C/W on a 4-layer 1-oz PCB with thermal vias under the exposed pad, the junction temperature rise above ambient is below 1 C - well within the 125 C maximum. The exposed pad must be soldered to the PCB for the datasheet thermal resistance to hold; dry joints under the e-pad inflate theta_JA dramatically.
Place the ICSP connector (MCLR/VDD/VSS/PGD/PGC) at the board edge so the production programmer can reach it without removing the LCD glass. Route the segment bus in a single 16-bit bus to the LCD connector, keep the common pins in a separate bus, and add ground-guard traces around the high-impedance segment lines to avoid crosstalk from digital signals. Stitch the QFN-64 thermal pad with an array of 4-6 thermal vias (0.3 mm drill, 0.65 mm pitch) to the internal ground plane for both thermal and electrical bonding.
Do not forget to configure unused pins as outputs (or enable the global weak pull-up) - floating inputs can cause supply current to rise by hundreds of uA. The AVDD and AVSS pins must be connected even if the ADC is unused, otherwise the part can fail to start. Ensure the MCLR pin has a 10 kohm pull-up to VDD and a 100 nF cap to ground; without these the ICSP programming chain is unreliable. Do not enable the LCD charge pump above the maximum VDD; it is not a boost regulator and the output voltage is clamped to the LCD bias level.
규정 준수 정보
RoHS and REACH compliance per Microchip product page. Lead-free and halogen-free per datasheet. Not AEC-Q100 qualified; choose PIC16F1946-E/PT for extended-temperature industrial use. For automotive AEC-Q100 work, select a PIC16F1xxx part that is explicitly automotive-grade.
