PIC16LC924-04/L - 8-Bit CMOS MCU w/ LCD Driver, 7KB OTP | Microchip
MPN: PIC16LC924-04/L ✗ Cuối đờiPIC16LC924-04/L Tóm tắt
Background: An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, peripherals, and I/O onto one silicon die. The PIC16C/PIC16LC family from Microchip uses a Harvard RISC architecture with a 14-bit instruction word, which keeps instruction fetch and data access on parallel buses for fast deterministic execution. The 'LC' suffix denotes a low-voltage CMOS variant that operates down to 2.5V, which is critical for battery-powered designs that need to survive deep-discharge conditions. Built-in LCD drivers eliminate the need for an external charge-pump or segment-driver ASIC, reducing both BOM cost and PCB area in meter, appliance, and consumer-display products.
Key features include 7KB OTP program memory organized as 4K x 14, 176 bytes of data RAM, 52 bidirectional I/O pins, integrated LCD driver with up to 32 segment outputs, a 5-channel 8-bit ADC, USART, capture/compare/PWM, and a watchdog timer. The OTP memory lets designers iterate firmware during development and lock production units economically for low- to mid-volume manufacturing.
The architecture combines a RISC CPU core with on-chip peripherals tuned for human-interface and instrumentation applications. The internal oscillator option further reduces external component count.
Typical applications include battery-powered thermostats and utility meters, appliance front-panel controls, point-of-sale terminals, and instrumentation readouts. The on-chip LCD controller eliminates the need for an external driver.
When designing with this device, observe the 4 MHz maximum clock at 5V. Designers planning field firmware updates should consider migrating to a Flash-based PIC16F equivalent (such as PIC16F946 in 64-pin TQFP or similar 68-pin variants) to retain the LCD subsystem with in-circuit reprogrammability.
This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design notes that are not collected in any single manufacturer document.
Bộ thay thế dễ dàng lắp đặt cho PIC16LC924-04/L — 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 PIC16LC924-04/L (cùng hình factor và footprint) — khác nhau ở LCD Driver, Package, Program Memory Type, ADC, Instruction Set.
PIC16LC924-04I/L
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LC924T-04I/L
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C924-04/L
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C924-04I/L
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LC924T-04/L
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16LC924-04/PQ
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16LC924-04/L Tỷ lệ tối đa & tính chất điện
| Core Architecture | 8-bit PIC RISC (Harvard) |
| Family | PIC16C / PIC16LC |
| Program Memory Type | OTP (One-Time-Programmable) |
| Program Memory Size | 7 KB (4K x 14) |
| Data RAM | 176 bytes |
| Maximum Clock Speed | 4 MHz |
| Supply Voltage Range | 2.5 V to 5.5 V |
| I/O Pins | 52 |
| LCD Driver | Integrated (up to 32 segments) |
| ADC | 5-channel x 8-bit |
| Peripherals | USART, CCP, Watchdog Timer, POR |
| Nhiệt độ hoạt động | 0 C to +70 C (commercial) |
| Hộp | 68-pin PLCC (24.23 x 24.23 mm) |
| Kiểu lắp đặt | Surface Mount (J-Lead) |
Hướng dẫn cấu hình chân PIC16LC924-04/L 68-pin plcc (24.23 x 24.23 mm)
Cấu hình chân cho PIC16LC924-04/L (68-pin plcc (24.23 x 24.23 mm) gói). IC số này bao gồm chân GPIO, giao diện truyền thông (UART, SPI, I2C) và chân nguồn. Tham khảo tài liệu thông số kỹ thuật của nhà sản xuất để biết các chức năng chân thay thế và tùy chọn cấu hình. Cực kỳ quan trọng cho thiết kế hệ thống tích hợp và lập trình PCB.
Không có dữ liệu chân cụ thể sẵn có cho PIC16LC924-04/L.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
PIC16LC924-04/L phù hợp cho 7 Áp dụngs: Battery-Powered Thermostat, Utility Meter Front Panel, Appliance Front-Panel Control, Point-of-Sale Terminal Readout, Portable Instrumentation Readout, Industrial Process Indicator, Consumer Electronics Display Controller.
Battery-Powered Thermostat
The PIC16LC924-04/L fits battery-powered thermostats because its 'LC' low-voltage CMOS process operates from 2.5 V to 5.5 V, surviving two- and three-cell alkaline packs through deep discharge. The integrated 32-segment LCD driver directly drives the temperature and setpoint display, eliminating an external charge-pump ASIC and reducing BOM cost. With 7 KB OTP and 176 bytes of RAM, the MCU handles scheduling, hysteresis control, and keypad scanning on 52 I/O pins. The 4 MHz clock is more than sufficient for typical HVAC control loops measured in seconds, and the commercial 0 C to 70 C window covers indoor residential environments. Static CMOS design combined with Sleep mode keeps quiescent current low for multi-year battery life.
Được đề xuất
Utility Meter Front Panel
The PIC16LC924-04/L is well suited for electric, gas, and water meter front panels because the integrated LCD driver can directly multiplex up to 32 segments for consumption, tariff, and status indicators. The 52 I/O pins accommodate pulse-input metering, tamper detection switches, and an optical port for AMR (Automatic Meter Reading). OTP memory locks the calibration and tariff firmware to prevent field tampering, which is essential for billing accuracy. The 68-pin PLCC package provides enough I/O for both the display multiplexer and the metrology interface, while the 176 bytes of RAM buffer pulse counts between LCD refresh cycles.
Được đề xuất
Appliance Front-Panel Control
For washing machines, microwave ovens, and dishwasher control boards, the PIC16LC924-04/L provides all the integration needed: 52 I/O for keypads and LEDs, 32-segment LCD for cycle status, and a 5-channel 8-bit ADC reading temperature and water-level sensors. The 7 KB OTP fits menu navigation, cycle profiles, and fault diagnostics without external memory. The 4 MHz clock executes control loops and timer logic with adequate margin, while the integrated USART enables service-port diagnostics. The commercial 0 C to 70 C window covers indoor appliance environments, and the PLCC package supports through-hole manufacturing processes common in white-goods production.
Được đề xuất
Point-of-Sale Terminal Readout
In POS terminals and small cash registers, the PIC16LC924-04/L drives the operator display, scans the keypad, and manages receipt-printer handshake. The integrated LCD driver reduces display-driver components on the BOM while 52 I/O pins accommodate a 4x4 keypad matrix, status LEDs, and a serial printer interface. The 7 KB OTP fits transaction-format, tax-table, and authentication logic. Commercial temperature grade suits indoor retail environments, and the 68-pin PLCC offers robust mechanical connections for high-vibration POS counter installations. The Harvard RISC core executes deterministic keypad-debounce and printer-handshake sequences at 4 MHz with zero jitter.
Được đề xuất
Portable Instrumentation Readout
For handheld multimeters and portable test instruments, the PIC16LC924-04/L is a strong match: 2.5 V to 5.5 V operation allows direct battery connection without boost converters, and the integrated LCD driver displays measurement readouts with low-power segment driving. The 5-channel 8-bit ADC samples sensor inputs directly, while 52 I/O handle range switching, mode buttons, and rotary encoder inputs. The 176 bytes of RAM buffer measurement averaging between display updates. OTP memory locks calibration constants to prevent user tampering, important for NIST-traceable instrumentation.
Được đề xuất
Industrial Process Indicator
For industrial process indicators on the factory floor, the PIC16LC924-04/L delivers integrated LCD display, 52 I/O for limit alarms and 4-20 mA loop interfaces, and OTP firmware protection against unauthorized modification. The 4 MHz clock executes PID-loop display calculations at rates well above the human-eye refresh threshold. 7 KB of OTP stores multi-channel scaling, alarm setpoints, and Modbus-style register maps. The commercial temperature grade covers most indoor control-panel environments, while the 68-pin PLCC provides rugged mechanical retention in panel-mount chassis.
Được đề xuất
Consumer Electronics Display Controller
In consumer audio equipment, clock radios, and kitchen scales, the PIC16LC924-04/L provides an all-in-one display + control solution. The integrated 32-segment LCD driver supports clock digits, channel labels, and weight readouts without external drivers, while 52 I/O accommodate IR receivers, rotary encoders, and tactile buttons. OTP memory locks user-interface firmware in cost-sensitive consumer products. The 2.5 V to 5.5 V supply range allows direct 3-cell alkaline or single Li-ion operation, and the static CMOS Sleep mode drops quiescent current below microamp levels for battery-powered shelf life.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16LC924-04/L — 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 | PIC16LC924-04I/L | PIC16LC924T-04I/L | PIC16C924-04/L | PIC16C924-04I/L | PIC16LC924T-04/L |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 68-pin PLCC (24.23x24.23) | 68-pin PLCC (24.23x24.23) - same | 68-pin PLCC (24.23x24.23) - same | 68-pin PLCC (24.23x24.23) - same | 68-pin PLCC (24.23x24.23) - same | 68-pin PLCC (24.23x24.23) - same |
| Program Memory | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP |
| Supply Voltage Range | 2.5 V to 5.5 V (LC) | 2.5 V to 5.5 V (LC) | 2.5 V to 5.5 V (LC) | 4.5 V to 5.5 V (C) | 4.5 V to 5.5 V (C) | 2.5 V to 5.5 V (LC) |
| Operating Temperature | 0 C to +70 C (commercial) | -40 C to +85 C (industrial) | -40 C to +85 C (industrial) | 0 C to +70 C (commercial) | -40 C to +85 C (industrial) | 0 C to +70 C (commercial) |
| Maximum Clock Speed | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| LCD Driver Segments | Up to 32 | Up to 32 | Up to 32 | Up to 32 | Up to 32 | Up to 32 |
| I/O Pins | 52 | 52 | 52 | 52 | 52 | 52 |
| Packaging Format | Tube | Tube | Tape & Reel | Tube | Tube | Tape & Reel |
Bảo phân biệt quan trọng
- Wider supply voltage range than C-variant siblings (vsPIC16C924-04/L)
- Commercial temperature grade cost optimization (vsPIC16LC924-04I/L)
- Integrated LCD driver eliminates external charge-pump ASICs (vsGeneric 8-bit MCU without LCD)
Ghi chú thiết kế
The PIC16LC924-04/L operates from 2.5 V to 5.5 V, but the maximum 4 MHz clock requires VDD >= 4.5 V per the PIC16C924 datasheet. At 3.0 V operation the part must run at 2 MHz or below. Designers using two-cell alkaline batteries (3.0 V nominal) must include brown-out-reset configuration and account for voltage drop during Sleep mode wake-up to avoid oscillator instability.
OTP memory cannot be erased or rewritten. Any firmware bug discovered after programming locks the silicon permanently, requiring a new part. For prototypes and field-updateable products, switch to Flash-based PIC16F946 or PIC18F8490 family MCUs, which have similar LCD drivers but require PCB rework from 68-pin PLCC to 64-pin TQFP.
The PIC16LC924-04/L is rated for commercial 0 C to +70 C operation. For outdoor or industrial installations use the 'I' suffix variant (PIC16LC924-04I/L or PIC16LC924T-04I/L) qualified for -40 C to +85 C. Operating below 0 C without proper industrial-grade qualification risks oscillator start-up failure and ADC offset drift per the Microchip datasheet temperature specifications.
The 68-pin PLCC package has J-leads on all four sides. Place decoupling capacitors (100 nF ceramic + 10 uF tantalum) within 5 mm of the VDD pins with a low-inductance ground return. For the LCD driver outputs, route segment and common traces with minimal crosstalk - keep adjacent segments separated by at least one ground trace and use a ground plane beneath the LCD glass to suppress coupling.
Thông tin tuân thủ
Compliance status not explicitly stated in the Verified Web Data. As a legacy Microchip PIC16C family part released in the 1990s, the original 68-pin PLCC variant may not be fully RoHS compliant; lead-free re-stocked variants should be verified against the latest distributor data. AEC-Q100 not applicable for commercial-grade part.
