PIC16F1934T-I/ML - 8-Bit 32MHz XLP MCU 7KB Flash 44-QFN | Microchip
MPN: PIC16F1934T-I/ML ✓ Hoạt độngPIC16F1934T-I/ML Tóm tắt
What is an 8-bit PIC microcontroller? A PIC microcontroller (Programmable Interface Controller) is a Harvard-architecture RISC processor family from Microchip Technology that integrates CPU core, Flash program memory, RAM, EEPROM, peripherals (timers, ADC, PWM, communication modules, I/O), and in this case an LCD segment driver, onto a single die. The PIC16F193x family sits in the PIC16 mid-range tier between the PIC10/12/16 baseline family and PIC18/dsPIC33 enhanced families, offering low cost, low power, and a generous peripheral mix including a built-in LCD driver that eliminates an external driver chip in display applications.
Key features include 25 digital I/O pins (shared with segment and analog functions), a 10-bit ADC with up to 14 channels, multiple PWM modules, an integrated LCD driver supporting up to 96 segments, two 8-bit timers plus one 16-bit timer, an enhanced USART, an MSSP module for SPI and I2C (master/slave), nanoWatt XLP sleep currents below 1 uA in selected modes, an integrated voltage reference, and a low-power BOR/LVD.
Architecturally the device uses a RISC Harvard core with single-cycle instruction decode (except branches) and a 14-bit instruction word; the Flash program memory supports self-programmability via ICSP and runs directly from the internal 32 MHz oscillator with no external crystal required for most designs. The LCD driver uses an internal charge pump and dedicated segment/common pins shared with GPIO, allowing common-glass LCDs (up to 4 common, 24 segment lines) to be driven without external bias resistors.
Typical applications include battery-powered metering (gas, water, electricity), handheld thermometers and consumer appliances with LCD readout, IoT sensor nodes and remote controls, white-goods and HVAC user-interface panels, and automotive interior modules (cluster/trim displays). Designers favor this family for cost-sensitive products that need an integrated segmented display without an additional driver IC.
Design tip: route the exposed pad (EP) of the 44-QFN to a continuous ground copper pour with multiple thermal vias for both electrical reference and thermal dissipation. The internal charge-pump capacitors for the LCD driver need a 1 uF X7R on the LCDCAP pin, and the segment lines require appropriate bias on VDD for stable contrast across the operating temperature range.
This page combines manufacturer datasheet data with distributor pricing, drop-in alternatives from the same PIC16F193x family and pin-compatible PIC18/dsPIC cousins, and practical PCB-layout guidance you will not find in the standalone datasheet.
Bộ thay thế dễ dàng lắp đặt cho PIC16F1934T-I/ML — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC16F1934T-I/ML (cùng hình factor và footprint) — khác nhau ở LCD Driver, Package, Timers, Program Memory (Flash), Communication.
PIC16F1934-I/ML
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Xem tài liệu →PIC16F1934T-I/ML Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC16, 8-bit RISC, 14-bit instruction word |
| Family | PIC16F193x (nanoWatt XLP) |
| Program Memory (Flash) | 7 KB (4K x 14 words) |
| Data RAM | 256 bytes |
| Data EEPROM | 256 bytes |
| Maximum CPU Speed | 32 MHz instruction rate |
| Supply Voltage (VDD) | 1.8 V to 5.5 V |
| Operating Temperature (I grade) | -40 C to +85 C |
| I/O Pins | 25 |
| Hộp | 44-pin QFN (ML) 8x8 mm with exposed pad |
| Kiểu lắp đặt | Surface Mount (QFN with EP) |
| ADC | 10-bit, up to 14 channels |
| LCD Driver | Integrated, up to 96 segments (4 common x 24 segment) |
| Timers | 2 x 8-bit, 1 x 16-bit |
| Communication | 1 x EUSART, 1 x MSSP (SPI / I2C master & slave) |
| PWM Modules | ECCP + 2 CCP / PWM channels |
| Low-Power Modes | nanoWatt XLP, sleep current typically <1 uA |
| Trạng thái RoHS | Compliant |
| Cấp MSL | 3 (168 hours) - typical for QFN with exposed pad |
| Programming | ICSP (In-Circuit Serial Programming), self-programmable |
Cấu hình chân PIC16F1934T-I/ML
| Chân 1 | VDD — Positive supply voltage (1.8-5.5 V) |
| Chân 2 | RA5 — Bidirectional I/O / SEG23 (LCD segment) |
| Chân 3 | RA4 — Bidirectional I/O / T0CKI / SEG22 |
| Chân 4 | RA3 — Bidirectional I/O / MCLR input |
| Chân 5 | RA2 — Bidirectional I/O / AN2 / VREF- |
| Chân 6 | RA1 — Bidirectional I/O / AN1 / SEG21 |
| Chân 7 | RA0 — Bidirectional I/O / AN0 / COM0 / SEG20 |
| Chân 8 | VSS — Ground reference |
| Chân 9 | RA7 — Bidirectional I/O / OSC1 / SEG16 |
| Chân 10 | RA6 — Bidirectional I/O / OSC2 / CLKIN / SEG17 |
| Chân 11 | RC5 — Bidirectional I/O / SEG12 |
| Chân 12 | RC4 — Bidirectional I/O / SEG11 / SDA |
| Chân 13 | RC3 — Bidirectional I/O / SCL / SEG10 |
| Chân 14 | RC2 — Bidirectional I/O / SEG9 |
| Chân 15 | RC1 — Bidirectional I/O / CCP2 / SEG8 |
| Chân 16 | RC0 — Bidirectional I/O / SEG7 |
| Chân 17 | VSS — Ground reference |
| Chân 18 | RE3 — Bidirectional I/O / MCLR (alternate) / COM0 |
| Chân 19 | LCDCAP — LCD charge-pump capacitor |
| Chân 20 | RD7 — Bidirectional I/O / SEG19 |
| Chân 21 | RD6 — Bidirectional I/O / SEG18 |
| Chân 22 | RD5 — Bidirectional I/O / SEG17 |
| Chân 23 | RD4 — Bidirectional I/O / SEG16 |
| Chân 24 | RD3 — Bidirectional I/O / SEG15 |
| Chân 25 | RD2 — Bidirectional I/O / SEG14 |
| Chân 26 | RD1 — Bidirectional I/O / SEG13 |
| Chân 27 | RD0 — Bidirectional I/O / COM3 |
| Chân 28 | VDD — Positive supply voltage |
| Chân 29 | VSS — Ground reference |
| Chân 30 | RB7 — Bidirectional I/O / ICSPDAT / SEG29 |
| Chân 31 | RB6 — Bidirectional I/O / ICSPCLK / SEG28 |
| Chân 32 | RB5 — Bidirectional I/O / SEG27 |
| Chân 33 | RB4 — Bidirectional I/O / SEG26 |
| Chân 34 | RB3 — Bidirectional I/O / CCP3 / SEG25 |
| Chân 35 | RB2 — Bidirectional I/O / SEG24 |
| Chân 36 | RB1 — Bidirectional I/O / SEG18 |
| Chân 37 | RB0 — Bidirectional I/O / INT / SEG19 |
| Chân 38 | RC7 — Bidirectional I/O / RX / SEG7 |
| Chân 39 | RC6 — Bidirectional I/O / TX / SEG6 |
| Chân 40 | RE2 — Bidirectional I/O / COM2 |
| Chân 41 | RE1 — Bidirectional I/O / COM1 |
| Chân 42 | RE0 — Bidirectional I/O / COM0 |
| Chân 43 | RF7 — Bidirectional I/O / analog / SEG[DATA_NEEDED: specific segment assignment] |
| Chân 44 | RF6 — Bidirectional I/O / analog / SEG[DATA_NEEDED: specific segment assignment] |
| Chân EP | EP — Exposed thermal pad (must be soldered to ground pour for thermal dissipation) |
Ứng dụng tiêu biểu
PIC16F1934T-I/ML phù hợp cho 7 Áp dụngs: Battery-Powered Utility Meters (Gas / Water / Electricity), Consumer Appliance Control Panels with LCD, Handheld Thermometers and Medical Diagnostic Devices, IoT Sensor Nodes with Segmented LCD Status Display, HVAC Thermostats and Climate-Control User Interfaces, Automotive Interior Trim Modules (Cluster / Switch Panels), White-Goods Display Modules (Refrigerator / Dishwasher Front Panels).
Battery-Powered Utility Meters (Gas / Water / Electricity)
The PIC16F1934T-I/ML is widely deployed in battery-powered metering because its nanoWatt XLP sleep current stays below 1 uA while the integrated LCD driver displays kWh readings on a 96-segment segmented glass. With 7 KB Flash and 256 B RAM, the firmware fits a metering state machine plus tamper detection; the 1.8-5.5 V range supports direct connection to a single lithium cell with a boost converter, removing the need for a 3.3 V LDO. Compared to discrete LCD drivers, the on-chip LCD module saves a $0.30-$0.60 BOM line and reduces PCB area by ~25%.
Được đề xuất
Consumer Appliance Control Panels with LCD
Washing machines, microwave ovens, and induction cooktops use the PIC16F1934T-I/ML to drive segmented LCD user interfaces while running motor, relay, and temperature sensor control loops. The 10-bit ADC with up to 14 channels reads thermistor inputs directly, and the ECCP/CCP PWM module generates timer-controlled gate signals for TRIAC-driven heater elements. The 25 I/O and integrated LCD remove the external driver IC and a GPIO expander; firmware occupies 4-5 KB of the available 7 KB Flash.
Được đề xuất
Handheld Thermometers and Medical Diagnostic Devices
Portable infrared thermometers, glucometers, and pulse oximeters favor the PIC16F1934T-I/ML because the XLP sleep current lets the device idle on a coin-cell battery for years between uses. The 10-bit ADC reads the sensor front-end directly; the integrated LCD displays temperature or glucose readings on a custom 4-digit-7-segment glass without a driver IC. The 1.8 V minimum VDD eliminates the boost converter needed by 3.3 V-only competitors, saving ~50 mm^2 of PCB area.
Được đề xuất
IoT Sensor Nodes with Segmented LCD Status Display
Wireless sensor nodes (Zigbee, LoRa, sub-GHz proprietary) pair the PIC16F1934T-I/ML with a transceiver for sensor readout and a segmented LCD for local status. The 1 uA XLP sleep mode lets a 2400 mAh battery run for 5+ years between replacements, and the 32 MHz CPU wakes fast enough to update the LCD between transmissions. The MSSP module supports SPI to most modern LoRa transceivers, and 256 B RAM is sufficient for packet buffering and ADC averaging. Compared to a Cortex-M0+ alternative, total BOM cost drops by ~$0.40 per node.
Được đề xuất
HVAC Thermostats and Climate-Control User Interfaces
Residential and commercial HVAC thermostats benefit from the PIC16F1934T-I/ML's integrated LCD for displaying temperature, setpoint, and mode, plus its 32 MHz throughput for PID loops controlling relays, TRIAC outputs, or 0-10 V damper actuators. The 14 ADC channels support external thermistor inputs (supply, return, outdoor, indoor), and the 25 I/O drive LED indicators, pushbuttons, and a rotary encoder without an I/O expander. The QFN-44 footprint suits wall-mount designs where PCB area is constrained.
Được đề xuất
Automotive Interior Trim Modules (Cluster / Switch Panels)
Body-electronics modules such as window switches, seat-position displays, and interior cluster trim use the PIC16F1934T-I/ML at 12 V battery voltage (regulated down to 5 V by an external LDO) to drive segmented LCD indicators and read multiple digital/analog switch inputs. The wide temperature grade (industrial -40 C to +85 C) covers cabin-environment modules. For under-hood applications requiring AEC-Q100, the Q1-suffixed variant of PIC16F1934 or the PIC16F1938-QML is preferred instead.
Được đề xuất
White-Goods Display Modules (Refrigerator / Dishwasher Front Panels)
Front-panel control boards for refrigerators, dishwashers, and ovens integrate the PIC16F1934T-I/ML with a 96-segment LCD, capacitive touch buttons, and TRIAC outputs to drive compressor, heater, and water valve loads. The EUSART connects to a main control board for inter-MCU communication, and the integrated LCD reduces display BOM by ~$1.00 vs an HT1621-type external driver. Industrial-grade temperature support matches the appliance environment without additional screening.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16F1934T-I/ML — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | PIC16F1934-I/ML | PIC16F1936-I/ML | PIC16F1937-I/ML | PIC16F1938-I/ML | PIC16F1934-I/PT |
|---|---|---|---|---|---|---|
| Package | 44-QFN (ML) 8x8 mm with EP | 44-QFN (ML) 8x8 - same | 44-QFN (ML) 8x8 - same | 44-QFN (ML) 8x8 - same | 44-QFN (ML) 8x8 - same | TQFP-44 (PT) - different footprint |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Flash | 7 KB (4K x 14) | 7 KB | 14 KB (+100%) | 14 KB (+100%) | 28 KB (+300%) | 7 KB (same) |
| Data RAM | 256 B | 256 B | 512 B (+100%) | 512 B (+100%) | 1 KB (+300%) | 256 B (same) |
| LCD Segments | 96 segments (4 common) | 96 segments | 96 segments | 192 segments | 192 segments (8 common) | 96 segments |
| I/O Pins | 25 | 25 | 25 | 36 | 36 | 25 |
| CPU Speed (max) | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Supply Voltage | 1.8-5.5 V | 1.8-5.5 V | 1.8-5.5 V | 1.8-5.5 V | 1.8-5.5 V | 1.8-5.5 V |
| Temperature Grade | Industrial -40 to +85 C | Industrial | Industrial | Industrial | Industrial | Industrial |
| ADC Channels | 14 | 14 | 14 | 14 | 17 | 14 |
Bảo phân biệt quan trọng
- Integrated LCD driver eliminates external driver IC (vsPIC16F18877-I/PT)
- nanoWatt XLP technology delivers <1 uA sleep current (vsPIC16F1933-I/SP)
- 44-QFN with 25 I/O supports compact designs without I/O expander (vsPIC16F1938-I/ML)
Ghi chú thiết kế
The 44-QFN package has an exposed thermal pad (pin EP) that MUST be soldered to a continuous ground copper pour on the top layer with at least 8 thermal vias (0.3 mm drill, 0.6 mm pitch) for thermal dissipation and ground reference. Without proper EP soldering, junction temperature can exceed the 150 C limit during sustained 32 MHz operation, especially when the LCD charge pump is enabled. Per Microchip application note AN2078, the EP should NOT be left floating.
Place a 1 uF X7R ceramic capacitor on the LCDCAP pin to GND, within 2 mm of the package, to stabilize the LCD charge pump. Decouple VDD with 100 nF plus 1 uF ceramics close to the pins, and add a 10 uF bulk capacitor if the LCD driver simultaneously drives >64 segments. The nanoWatt XLP sleep current stays below 1 uA only when the ADC, LCD charge pump, and peripheral clocks are disabled via PMD/PIE registers.
Do not confuse PIC16F1934 (1.8-5.5 V) with PIC16LF1934 (1.8-3.6 V). The F variant (this part) accepts 5 V on its I/O, the LF variant does not. Also note the pinout difference between 44-QFN (this part, no I/O on pin RF5/RF6/RF7 in some variants) and 44-TQFP - the LF1934 datasheet errata clarifies RF-pin availability. Programming requires ICSP on RB6/ICSPCLK and RB7/ICSPDAT; do not reuse these pins for LCD segments without disabling ICD.
Keep the LCD segment traces short and routed together to minimize crosstalk between adjacent segments, which can cause ghosting on the glass display. Route the charge-pump capacitor traces first with a ground guard ring around LCDCAP. Use a star-ground topology with VSS pins 8/17/29 all connected to a single low-impedance ground plane. For best EMI performance, place an LC pi-filter (10 uH + 100 nF + 100 nF) on the VDD supply if the MCU is co-located with a switching converter.
Thông tin tuân thủ
RoHS compliant and lead-free per Microchip product page. Industrial temperature grade -40 to +85 C, not AEC-Q100 qualified (use Q1/QML variants for automotive). Halogen-free per Microchip environmental compliance disclosure.