PIC16LF1904-I/P - 8-bit MCU, 7KB Flash, LCD, nanoWatt XLP | Microchip
MPN: PIC16LF1904-I/P ✓ Hoạt độngPIC16LF1904-I/P Tóm tắt
An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path, optimized for deterministic control and low power consumption in embedded systems. Within the broader taxonomy, the PIC16LF1904 sits at: microcontroller -> 8-bit MCU -> PIC16 family -> PIC16F1xxx enhanced mid-range core -> embedded semiconductor. It competes with other 8-bit low-power MCUs such as the TI MSP430 and Renesas RL78 families, but is differentiated by its integrated segmented LCD driver and the nanoWatt eXtreme Low Power (XLP) sleep currents typically below 50 nA in deep sleep.
Key features include 7KB (4K x 14 words) of self-programmable Flash, 256 bytes of SRAM, on-chip segmented LCD driver with up to 116 segments, an enhanced mid-range 8-bit CPU with 49 instructions, multiple power-managed operating modes (Run, Doze, Idle, Sleep), an on-chip 16 MHz internal oscillator, and peripherals including multiple 10-bit ADC channels, comparators, timers, and a configurable logic cell. XLP technology enables typical sleep currents under 50 nA, supporting years-of-battery-life designs such as wireless sensor nodes and metering.
The PIC16LF1904 architecture uses Microchip's enhanced mid-range 8-bit RISC core with hardware multiplier and 14-bit instruction word, providing predictable interrupt response, a single-cycle instruction execution model, and deterministic timing that has made PIC MCUs a default choice for cost-sensitive control loops. The integrated LCD segment driver removes the need for an external LCD controller and minimizes BOM cost in HMI panels.
Typical applications include battery-powered consumer devices (thermostats, remote controls, smoke detectors), industrial metering and instrumentation with LCD readouts, medical portable monitors, IoT sensor endpoints, and small appliance user interfaces. The on-chip segmented LCD driver makes it particularly suitable for any product that displays numeric or iconographic information on a glass LCD.
When designing with this device, ensure the ICSP/ICD pins (RB6/RB7) are accessible for in-circuit programming and debugging using Microchip's MPLAB X IDE and tools such as the MPLAB Snap or PICkit 4. Decoupling caps (100 nF plus 10 uF bulk) should be placed within 5 mm of VDD/VSS pins, and the internal oscillator should be calibrated using the OSCTUNE register to compensate across temperature.
This page synthesizes distributor pricing snapshots, drop-in alternative cross-references, and practical PCB-level design notes for the PIC16LF1904-I/P, complementing (not duplicating) the manufacturer datasheet with engineer-facing selection and replacement guidance.
Bộ thay thế dễ dàng lắp đặt cho PIC16LF1904-I/P — 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 PIC16LF1904-I/P (cùng hình factor và footprint) — khác nhau ở ADC, I/O Pins, Low-Power Technology, Mounting Type, Operating Temperature.
PIC16LF1902-I/P
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16LF1904-I/MV
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16LF1904-I/ML
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC16LF1903T-I/SO
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16F1904-I/P
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC16LF1904-I/P Tỷ lệ tối đa & tính chất điện
| Product Family | PIC16F1xxx (enhanced mid-range 8-bit) |
| Architecture | 8-bit RISC, 14-bit instruction word |
| Maximum CPU Frequency | 20 MHz |
| Program Memory (Flash) | 7 KB (4K x 14) |
| Data SRAM | 256 B |
| Supply Voltage (VDD) | 1.8 V to 3.6 V |
| Nhiệt độ hoạt động | -40 C to +85 C (Industrial, -I suffix) |
| Integrated LCD Driver | Yes (segmented LCD, up to 116 segments) |
| I/O Pins | Up to 36 (40-pin package) |
| ADC | 10-bit |
| Low-Power Technology | nanoWatt XLP (eXtreme Low Power) |
| Hộp | 40-pin PDIP (P) |
| Kiểu lắp đặt | Through-Hole |
| Trạng thái RoHS | Compliant |
| Cấp MSL | 1 (unlimited) |
Cấu hình chân PIC16LF1904-I/P
| Chân 1 | RA3/AN3/VREF+/SEG15 — Port A bit 3 / ADC ch3 / positive Vref / LCD SEG15 |
| Chân 2 | RA4/SEG14 — Port A bit 4 / LCD SEG14 |
| Chân 3 | RA5/SEG13 — Port A bit 5 / LCD SEG13 |
| Chân 4 | RA6/SEG12 — Port A bit 6 / LCD SEG12 |
| Chân 5 | RA7/SEG11 — Port A bit 7 / LCD SEG11 |
| Chân 6 | VSS — Ground reference |
| Chân 7 | RA0/AN0/C1OUT/SEG0 — Port A bit 0 / ADC ch0 / comparator output / LCD SEG0 |
| Chân 8 | RA1/AN1/C2IN-/SEG1 — Port A bit 1 / ADC ch1 / comparator input / LCD SEG1 |
| Chân 9 | RA2/AN2/C2IN+/SEG2 — Port A bit 2 / ADC ch2 / comparator input / LCD SEG2 |
| Chân 10 | RC0/T1OSO/T1CKI/SEG20 — Port C bit 0 / Timer1 osc / Timer1 clock / LCD SEG20 |
| Chân 11 | RC1/T1OSI/CCP2/SEG21 — Port C bit 1 / Timer1 osc / CCP2 / LCD SEG21 |
| Chân 12 | RC2/CCP1/SEG22 — Port C bit 2 / CCP1 PWM / LCD SEG22 |
| Chân 13 | RC3/SCK/SCL/SEG23 — Port C bit 3 / SPI SCK / I2C SCL / LCD SEG23 |
| Chân 14 | RC4/SDI/SDA/SEG24 — Port C bit 4 / SPI SDI / I2C SDA / LCD SEG24 |
| Chân 15 | RC5/SDO/SEG25 — Port C bit 5 / SPI SDO / LCD SEG25 |
| Chân 16 | RC6/TX/CK/SEG26 — Port C bit 6 / UART TX / UART CK / LCD SEG26 |
| Chân 17 | RC7/RX/DT/SEG27 — Port C bit 7 / UART RX / UART DT / LCD SEG27 |
| Chân 18 | RB0/INT/SEG30 — Port B bit 0 / External INT / LCD SEG30 |
| Chân 19 | RB1/SEG31 — Port B bit 1 / LCD SEG31 |
| Chân 20 | RB2/SEG32 — Port B bit 2 / LCD SEG32 |
| Chân 21 | RB3/SEG33 — Port B bit 3 / LCD SEG33 |
| Chân 22 | RB4/SEG34 — Port B bit 4 / LCD SEG34 |
| Chân 23 | RB5/SEG35 — Port B bit 5 / LCD SEG35 |
| Chân 24 | RB6/ICSPCLK — Port B bit 6 / ICSP clock |
| Chân 25 | RB7/ICSPDAT — Port B bit 7 / ICSP data |
| Chân 26 | VSS — Ground reference (second VSS pin) |
| Chân 27 | VDD — Positive supply 1.8V to 3.6V |
| Chân 28 | RD0/COM0 — Port D bit 0 / LCD COM0 |
| Chân 29 | RD1/COM1 — Port D bit 1 / LCD COM1 |
| Chân 30 | RD2/COM2 — Port D bit 2 / LCD COM2 |
| Chân 31 | RD3/COM3 — Port D bit 3 / LCD COM3 |
| Chân 32 | RE3/MCLR/VPP — Port E bit 3 / Master Clear / programming voltage |
| Chân 33 | RD4/SEG3 — Port D bit 4 / LCD SEG3 |
| Chân 34 | RD5/SEG4 — Port D bit 5 / LCD SEG4 |
| Chân 35 | RD6/SEG5 — Port D bit 6 / LCD SEG5 |
| Chân 36 | RD7/SEG6 — Port D bit 7 / LCD SEG6 |
| Chân 37 | RE0/SEG7 — Port E bit 0 / LCD SEG7 |
| Chân 38 | RE1/SEG8 — Port E bit 1 / LCD SEG8 |
| Chân 39 | RE2/SEG9 — Port E bit 2 / LCD SEG9 |
| Chân 40 | VDD — Positive supply 1.8V to 3.6V (second VDD pin) |
Ứng dụng tiêu biểu
PIC16LF1904-I/P phù hợp cho 6 Áp dụngs: Battery-Powered Thermostat with LCD, Wireless Sensor Node (Sub-1 GHz ARM), Water / Gas Metering with LCD Readout, Industrial Handheld Remote Control, Medical Portable Monitor (Class II-A Powered), Small Appliance User Interface.
Battery-Powered Thermostat with LCD
The PIC16LF1904-I/P is a strong fit for wall-mount thermostats running on 2x AA cells because its integrated segmented LCD driver directly drives a 28- to 116-segment glass display, eliminating any external LCD controller IC from the BOM. The 1.8V to 3.6V VDD range aligns with battery voltage across discharge, and the nanoWatt XLP sleep current below 50 nA enables multi-year battery life between cell replacements. The 7KB Flash accommodates proportional-integral control loops, schedule storage, and wireless commissioning firmware. Place the device on the same PCB as the LCD glass with 100 nF decoupling on VDD/VSS within 5 mm.
Được đề xuất
Wireless Sensor Node (Sub-1 GHz ARM)
For battery-powered Sub-1 GHz sensor nodes using a companion RF transceiver such as the Microchip MRF89XA or Texas Instruments CC1101, the PIC16LF1904-I/P serves as the host MCU thanks to its nanoWatt XLP sleep current and wake-from-Sleep-on-I/O-change capability. The integrated 10-bit ADC and comparator support analog sensor front-ends (temperature, light, moisture) without extra components. Running at 4 MHz from the internal oscillator during active RX/TX windows keeps active current low, and the LCD driver is unused in headless sensor form factors but does no harm. PIC16LF1904 is a Site MPN candidate on XAIPART for internal linking.
Được đề xuất
Water / Gas Metering with LCD Readout
Utility metering applications (cold-water, gas, electric consumption display) demand years of battery life, an LCD that remains readable down to 1.8 V, and tamper-resistant firmware storage - all strengths of the PIC16LF1904-I/P. The integrated charge-pumped LCD driver keeps the segment display visible across the full battery discharge curve, while the 7KB Flash holds signed metering firmware with calibration tables. The 40-pin PDIP package supports hand-soldered or wave-soldered meter-board assembly, common in legacy meter production. Use OSCTUNE to calibrate the internal RC oscillator against the 32 kHz secondary for timing accuracy.
Được đề xuất
Industrial Handheld Remote Control
Industrial remote controls for cranes, hoists, and overhead material handling benefit from the PIC16LF1904-I/P's deterministic enhanced mid-range 8-bit core, 20 MHz instruction throughput, and integrated LCD that displays channel/battery/error codes to the operator. The wide 1.8 V to 3.6 V supply range lets the design run from 2x AA or 2x AAA cells, and nanoWatt XLP deep-sleep extends shelf life between duty cycles. Watchdog timer and brown-out reset meet industrial reliability expectations. Pair with an H-bridge driver and a 433 MHz / 868 MHz transmitter module for a complete radio remote.
Được đề xuất
Medical Portable Monitor (Class II-A Powered)
Portable patient monitors such as pulse oximeters, infusion pump status displays, and small bench-top analyzers can use the PIC16LF1904-I/P for low-power host control and LCD readout of measured values. The industrial -40C to +85C temperature range and XLP sleep behavior support rechargeable Li-ion operation, while the on-chip 10-bit ADC digitizes analog sensor front-ends directly. This is a non-life-support design role; for direct diagnostic contact applications consult Microchip's medical-grade PIC families. Use an external approved isolation barrier if any mains-isolated section is present.
Được đề xuất
Small Appliance User Interface
Small kitchen and personal-care appliances (rice cookers, induction cookers, coffee machines, electric toothbrush chargers) often need a simple segmented LCD or LED-like indicator plus a touch-button matrix - a perfect role for the PIC16LF1904-I/P. The integrated LCD driver supports 116 segments covering all timer/mode icons, while the nanoWatt XLP keeps standby power well below 0.5 W to meet energy-efficiency regulations. The 40-pin PDIP is friendly for low-volume SKUs that skip SMT lines. Driving the appliance load (relay, triac, FET) goes through opto-isolated drivers from the MCU GPIO.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16LF1904-I/P — 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 | PIC16LF1902-I/P | PIC16LF1904-I/MV | PIC16LF1904-I/ML | PIC16LF1903T-I/SO | PIC16F1904-I/P |
|---|---|---|---|---|---|---|
| Package | PDIP-40 (P) | PDIP-40 (P) - same | QFN-40 (MV) - same pin count, SMD | QFN-44 (ML) - more pins, SMD | SOIC-28 (SO) - smaller pin count | PDIP-40 (P) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 7 KB (4K x 14) | 4 KB (2K x 14) | 7 KB | 7 KB | 7 KB | 7 KB |
| Data SRAM | 256 B | 256 B | 256 B | 256 B | 256 B | 256 B |
| Supply Voltage Range | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 2.3 V to 5.5 V |
| Maximum CPU Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Integrated LCD Driver | Yes (up to 116 segments) | Yes | Yes | Yes | Yes | Yes |
| nanoWatt XLP Sleep Current | <50 nA typical | <50 nA | <50 nA | <50 nA | <50 nA | ~100 nA (F-family sleep) |
| Mounting Style | Through-Hole (PDIP) | Through-Hole | Surface Mount (QFN) | Surface Mount (QFN) | Surface Mount (SOIC) | Through-Hole |
Bảo phân biệt quan trọng
- Integrated segmented LCD driver with on-chip charge pump (vsPIC16LF1519-I/P)
- nanoWatt XLP sleep current below 50 nA (vsPIC16F1904-I/P (F-family))
- 40-pin PDIP through-hole form factor for prototype assembly (vsPIC16LF18855-I/SP (28-pin SPDIP))
Ghi chú thiết kế
The PIC16LF1904-I/P runs from a 1.8 V to 3.6 V VDD rail and integrates nanoWatt XLP sleep. Place a 100 nF ceramic decoupling cap within 5 mm of each VDD pin (pins 27 and 40) and a single 10 uF bulk cap on the same VDD/VSS loop to handle active-mode inrush. For battery designs, configure the LCD driver for static or 1/2 bias and switch to the on-chip 32 kHz secondary oscillator in Sleep mode to keep sleep current under 50 nA; switch back to the HF internal oscillator (calibrated by OSCTUNE) only when an interrupt wakes the CPU.
Keep the trace between VDD/VSS pins and decoupling caps under 5 mm and route them on the same layer. Place the segmented LCD glass on the same side of the PCB as the MCU or use a through-glass flex interconnect, since segment and COM traces should not run under noisy switching nodes (e.g., an LED driver or boost converter). Keep the 32 kHz crystal traces short and guard them with a ground ring to minimize injection into the LCD bias generation. Route MCLR (pin 1) with a 10 kohm pull-up to VDD and a 100 nF cap to ground for clean in-circuit reset behavior.
Common pitfalls include: (1) forgetting the ICSP/ICD pins (RB6/RB7, pins 39/40) when laying out the PCB, which makes field firmware updates impossible without a costly socket adapter; (2) exceeding 3.6 V on VDD, which destroys the LF variant - if the design uses a Li-ion cell, route power through an LDO rather than directly to VDD; (3) leaving the LCD charge pump disabled in low-VIN designs, which makes the display invisible below ~2.0 V. Also enable the Brown-out Reset (BOR) in configuration words to ensure deterministic reset during battery insertion.
Estimated: at 20 MHz instruction rate with all peripherals active, the MCU draws ~5 mA; with 100 nF + 10 uF caps as recommended, VDD ripple stays under 50 mV. Place analog (ADC) and digital (LCD COM switching) ground returns to a star point at the VSS pin rather than daisy-chaining to avoid ADC crosstalk. If the application uses the internal temperature indicator or an external analog sensor, average multiple ADC samples and disable the digital input buffer on the analog channel (ANSEL bit) to prevent leakage current on the analog pin.
Thông tin tuân thủ
RoHS and REACH compliant per Microchip product compliance data. Lead-free finish standard. Industrial -40C to +85C temperature grade; not AEC-Q100 qualified - choose automotive-grade PIC16F1xxx variants for vehicle applications.
