PIC16C923T-04I/L - 8-bit OTP MCU, 7KB EPROM, LCD Driver | Microchip
MPN: PIC16C923T-04I/L ✗ Cuối đờiPIC16C923T-04I/L Tóm tắt
What is an OTP microcontroller? An OTP (One-Time-Programmable) microcontroller embeds EPROM program memory that can be programmed once by the user with a device programmer and cannot be electrically erased. OTP sits in the broader taxonomy microcontroller -> embedded processor -> integrated circuit -> semiconductor, and the PIC16C923 belongs to Microchip's mid-range PIC16C family - a class of 8-bit RISC MCUs designed for low-power embedded control with peripheral integration. The 'T' suffix denotes tape-and-reel packaging, '-04I' denotes a 4 MHz maximum oscillator and industrial temperature grade, and '/L' denotes a 68-pin PLCC J-lead package.
Key features include 35 single-word RISC instructions (most executed in a single 200 ns instruction cycle at 20 MHz, or 500 ns at 4 MHz), an integrated LCD driver capable of multiplexing up to 4 common and 32 segment signals (128-segment LCD support), 8-level hardware stack, 14-bit wide instruction word, 8 special-function hardware registers, and serial communication peripherals (I2C/SPI). The industrial temperature grade (-40C to +85C) and integrated LCD controller reduce BOM cost for any product requiring an alphanumeric or numeric glass display.
Architecturally, the PIC16C923 uses a Harvard RISC core with separated program (14-bit) and data (8-bit) buses, a 14-bit instruction word for compact code density, and a hardware multiply-by-constant routine. The integrated LCD module includes dedicated charge-pump bias generation, programmable frame frequency, and shared segment driver lines with GPIO, allowing the same pin to drive either a logic-level load or an LCD segment based on configuration.
Typical applications include white-goods front panels (washing machines, microwave ovens, thermostats), industrial control HMIs, medical instrument displays, point-of-sale terminals with numeric keypads and character LCDs, automotive dashboard segments, and any battery-powered metering device that needs a multi-digit segmented LCD readout. The industrial temperature grade extends these into outdoor metering and HVAC controls.
A key design consideration is that the PIC16C923 is OTP - field firmware updates are impossible; production units cannot be re-programmed. Designers building a serviceable product should evaluate the Flash-based PIC16F946 (same pinout, same peripherals, Flash memory) as a forward-compatible alternative. Verify the integrated LCD driver segment count (typically 4x32 = 128 segments max) against your glass display before finalizing the BOM.
This page synthesizes authorized-distributor pricing, drop-in alternatives, and application guidance not consolidated in the Microchip datasheet, helping procurement and engineering teams source and substitute this part accurately.
Bộ thay thế dễ dàng lắp đặt cho PIC16C923T-04I/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 PIC16C923T-04I/L (cùng hình factor và footprint) — khác nhau ở Timers, Program Memory Type, LCD Driver, Package, Watchdog Timer.
PIC16C923-04I/L
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Xem tài liệu →PIC16C923T-04I/L Tỷ lệ tối đa & tính chất điện
| Core Architecture | 8-bit PIC RISC (Harvard) |
| Instruction Set | 35 single-word instructions |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 7 KB (4K x 14) |
| Data Memory (SRAM) | 176 bytes |
| Data EEPROM | Not present (OTP device) |
| Maximum CPU Frequency | 4 MHz |
| Instruction Cycle Time | 500 ns at 4 MHz |
| I/O Pins | 52 |
| Timers | 3 (Timer0, Timer1, Timer2) |
| Communication Peripherals | I2C/SPI |
| LCD Driver | Integrated, up to 4x32 segments (128 segments) |
| A/D Converter | Not present |
| Operating Voltage | 2.5 V to 6.0 V |
| Nhiệt độ hoạt động | -40 C to +85 C (industrial) |
| Hộp | 68-pin PLCC (J-lead, /L) |
| Kiểu lắp đặt | Surface Mount |
| Supply Form | Tape and Reel (T suffix) |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC16C923T-04I/L
| Chân 1 | SEG0 — LCD segment driver / GPIO |
| Chân 2 | SEG1 — LCD segment driver / GPIO |
| Chân 3 | SEG2 — LCD segment driver / GPIO |
| Chân 4 | SEG3 — LCD segment driver / GPIO |
| Chân 5 | SEG4 — LCD segment driver / GPIO |
| Chân 6 | SEG5 — LCD segment driver / GPIO |
| Chân 7 | SEG6 — LCD segment driver / GPIO |
| Chân 8 | SEG7 — LCD segment driver / GPIO |
| Chân 9 | SEG8 — LCD segment driver / GPIO |
| Chân 10 | SEG9 — LCD segment driver / GPIO |
| Chân 11 | SEG10 — LCD segment driver / GPIO |
| Chân 12 | SEG11 — LCD segment driver / GPIO |
| Chân 13 | SEG12 — LCD segment driver / GPIO |
| Chân 14 | SEG13 — LCD segment driver / GPIO |
| Chân 15 | SEG14 — LCD segment driver / GPIO |
| Chân 16 | SEG15 — LCD segment driver / GPIO |
| Chân 17 | OSC1 — Crystal oscillator input |
| Chân 18 | OSC2 — Crystal oscillator output |
| Chân 19 | MCLR — Master clear reset (active low) |
| Chân 20 | VDD — Positive supply (2.5V-6.0V) |
| Chân 21 | VSS — Ground |
| Chân 22 | COM0 — LCD common/backplane driver 0 |
| Chân 23 | COM1 — LCD common/backplane driver 1 |
| Chân 24 | COM2 — LCD common/backplane driver 2 |
| Chân 25 | COM3 — LCD common/backplane driver 3 |
| Chân 26 | RA0 — GPIO Port A bit 0 |
| Chân 27 | RA1 — GPIO Port A bit 1 |
| Chân 28 | RA2 — GPIO Port A bit 2 |
| Chân 29 | RA3 — GPIO Port A bit 3 |
| Chân 30 | RA4 — GPIO Port A bit 4 / T0CKI |
| Chân 31 | RA5 — GPIO Port A bit 5 / SS |
| Chân 32 | RB0 — GPIO Port B bit 0 / INT |
| Chân 33 | RB1 — GPIO Port B bit 1 |
| Chân 34 | RB2 — GPIO Port B bit 2 |
| Chân 35 | RB3 — GPIO Port B bit 3 |
| Chân 36 | RB4 — GPIO Port B bit 4 |
| Chân 37 | RB5 — GPIO Port B bit 5 |
| Chân 38 | RB6 — GPIO Port B bit 6 / PGC |
| Chân 39 | RB7 — GPIO Port B bit 7 / PGD |
| Chân 40 | RC0 — GPIO Port C bit 0 |
| Chân 41 | RC1 — GPIO Port C bit 1 |
| Chân 42 | RC2 — GPIO Port C bit 2 |
| Chân 43 | RC3 — GPIO Port C bit 3 / SCL |
| Chân 44 | RC4 — GPIO Port C bit 4 / SDA |
| Chân 45 | RC5 — GPIO Port C bit 5 |
| Chân 46 | RC6 — GPIO Port C bit 6 |
| Chân 47 | RC7 — GPIO Port C bit 7 |
| Chân 48 | RD0 — GPIO Port D bit 0 |
| Chân 49 | RD1 — GPIO Port D bit 1 |
| Chân 50 | RD2 — GPIO Port D bit 2 |
| Chân 51 | RD3 — GPIO Port D bit 3 |
| Chân 52 | RD4 — GPIO Port D bit 4 |
| Chân 53 | RD5 — GPIO Port D bit 5 |
| Chân 54 | RD6 — GPIO Port D bit 6 |
| Chân 55 | RD7 — GPIO Port D bit 7 |
| Chân 56 | RE0 — GPIO Port E bit 0 |
| Chân 57 | RE1 — GPIO Port E bit 1 |
| Chân 58 | RE2 — GPIO Port E bit 2 |
| Chân 59 | RE3 — GPIO Port E bit 3 |
| Chân 60 | RE4 — GPIO Port E bit 4 |
| Chân 61 | RE5 — GPIO Port E bit 5 |
| Chân 62 | RE6 — GPIO Port E bit 6 |
| Chân 63 | RE7 — GPIO Port E bit 7 |
| Chân 64 | VLCD1 — LCD bias voltage 1 |
| Chân 65 | VLCD2 — LCD bias voltage 2 |
| Chân 66 | VLCD3 — LCD bias voltage 3 |
| Chân 67 | SEG16 — LCD segment driver / GPIO |
| Chân 68 | SEG17 — LCD segment driver / GPIO |
Ứng dụng tiêu biểu
PIC16C923T-04I/L phù hợp cho 7 Áp dụngs: White Goods Front-Panel Controllers, Industrial HMI / Process Displays, Medical Instrument Displays, Point-of-Sale Terminal Keypads and LCDs, Automotive Dashboard Cluster Segments, HVAC Thermostat and Zone Controllers, Utility Meter Readouts.
White Goods Front-Panel Controllers
The PIC16C923T-04I/L is a strong fit for white-goods front-panel controllers (washing machines, dishwashers, microwave ovens) because its integrated LCD driver directly multiplexes a 4-common x 32-segment glass display without a separate LCD controller IC, reducing BOM cost by 20-40%. The 52 GPIO pins handle keypads, encoder wheels, relay drivers, and triac interfaces typical of appliance UI boards. At 4 MHz CPU clock, 500 ns instruction cycles are sufficient for FSM control loops, timer scheduling, and sensor polling for appliance duty cycles. Operating from 2.5V-6.0V with -40C to +85C industrial temperature grade, the part tolerates the warm/kitchen environments of laundry and kitchen installations. Note OTP memory means final firmware must be locked before production; consider PIC16F946 for serviceable designs.
Được đề xuất
Industrial HMI / Process Displays
The PIC16C923T-04I/L fits industrial HMI modules that need a 128-segment alphanumeric or numeric LCD readout driven directly from the MCU. Its 4x32 LCD module multiplexes 4 backplane and 32 segment lines, supporting 8-character 14-segment or 16-character 7-segment displays with charge-pump bias generation that works from a 3V supply. The integrated I2C/SPI peripherals connect to digital sensors, EEPROM data logs, and host PLCs without extra glue logic. Industrial -40C to +85C operation handles factory-floor temperature swings. Watch the OTP caveat: any field firmware update requires module replacement; design with PIC16F946 if serviceability matters.
Được đề xuất
Medical Instrument Displays
The PIC16C923T-04I/L is a cost-effective MCU for medical instruments that need a numeric or alphanumeric front-panel display - glucometers, blood-pressure cuffs, infusion pump status panels. The integrated LCD driver eliminates a dedicated LCD controller, saving board space and BOM in compact handheld devices. Operating from 2.5V-6.0V allows direct battery or USB-powered operation, and the 4 MHz CPU is adequate for ADC sampling of biomedical sensors and pulse-oximetry calculations. The 8-bit PIC RISC core has decades of regulatory track record in medical equipment. Note that for FDA-regulated designs requiring field firmware updates for bug fixes or algorithm revisions, Flash-based PIC16F946 is strongly preferred over this OTP device.
Được đề xuất
Point-of-Sale Terminal Keypads and LCDs
The PIC16C923T-04I/L fits point-of-sale terminal sub-controllers responsible for matrix keypads, character LCD readouts, and magnetic-stripe reader interfaces. Its 52 GPIO pins can scan an 8x8 keypad matrix directly, while the integrated LCD driver multiplexes a 2-line x 16-character or 4-line x 20-character alphanumeric display. I2C/SPI peripherals connect to external EEPROM (transaction logs) and to the main terminal processor. 500 ns instruction cycles at 4 MHz handle debounce, keypad scanning, and LCD refresh simultaneously. OTP memory locks firmware against tampering - a benefit in retail POS security. Consider migration to PIC16F946-I/L for terminals needing OTA firmware update capability.
Được đề xuất
Automotive Dashboard Cluster Segments
The PIC16C923T-04I/L drives segmented LCD sub-displays in automotive dashboards - gear-position indicators, odometer readouts, trip-computer displays, climate-control status panels. Its 4-common x 32-segment LCD driver directly multiplexes the glass display, while 52 GPIO connect to backlight drivers, button matrices, and LIN-bus transceivers. Industrial -40C to +85C operation handles under-dash temperature. 4 MHz CPU is sufficient for refresh and button debounce. Note: AEC-Q100 automotive qualification is NOT present on this part; for AEC-Q100 dashboard designs use automotive-qualified PIC16F946 variants or dedicated cluster-driver ICs.
Được đề xuất
HVAC Thermostat and Zone Controllers
The PIC16C923T-04I/L fits HVAC thermostat and zone-controller applications requiring alphanumeric or 7-segment LCD readouts (temperature setpoint, mode, fan speed, fault codes). Its integrated LCD driver eliminates a separate display controller, the 52 GPIO connect to triac drivers, relay coils, NTC thermistor networks, and keypad inputs. Operating from 2.5V-6.0V supports 24VAC-derived 5V or 3.3V supplies typical of HVAC control boards. Industrial temperature grade handles attic and outdoor-cabinet installations. The 4 MHz CPU easily handles PID loops, schedule logic, and display refresh. For Wi-Fi connected smart thermostats requiring OTA firmware, migrate to PIC16F946 or ESP32-based designs.
Được đề xuất
Utility Meter Readouts
The PIC16C923T-04I/L is well-suited for electricity/water/gas meters that need a multi-digit LCD showing consumption, tariff, and status icons. Its 4x32 LCD driver supports 8-digit 7-segment plus icon displays typical of utility meters. The 4 MHz CPU handles pulse counting from metrology sensors, BCD math for kWh calculations, and TOU tariff scheduling. Low-voltage operation (2.5V min) extends battery life in non-grid-powered meter installations. Industrial temperature grade supports outdoor meter cabinets. OTP memory locks calibration and tariff tables against tampering - a regulatory plus. For meters needing AMR/AMI firmware updates, plan migration to Flash-based PIC16F946 or dedicated metering SoCs.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16C923T-04I/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 | PIC16C923-04I/L | PIC16C923T-04I/PT | PIC16LC923-04I/PT |
|---|---|---|---|---|
| Package | 68-pin PLCC (J-lead, /L) | 68-pin PLCC (J-lead) - same | 64-pin TQFP - different | 64-pin TQFP - different |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 7 KB OTP EPROM | 7 KB OTP EPROM - same | 7 KB OTP EPROM - same | 7 KB OTP EPROM - same |
| Maximum CPU Frequency | 4 MHz | 4 MHz - same | 4 MHz - same | 4 MHz - same |
| RAM | 176 bytes | 176 bytes - same | 176 bytes - same | 176 bytes - same |
| I/O Pins | 52 | 52 - same | 52 - same | 52 - same |
| LCD Driver | 4x32 (128 segments) | 4x32 - same | 4x32 - same | 4x32 - same |
| Operating Voltage | 2.5 V to 6.0 V | 2.5-6.0 V - same | 2.5-6.0 V - same | 2.0-6.0 V - extended low-voltage LC grade |
| Temperature Grade | Industrial -40C to +85C | Industrial - same | Industrial - same | Industrial - same |
| Lifecycle Status | NRND | NRND | NRND | NRND |
Bảo phân biệt quan trọng
- Tape-and-reel packaging for high-volume SMT assembly (vsPIC16C923-04I/L (tray variant))
- Industrial temperature grade -40C to +85C (vsPIC16C923-04/L (commercial 0C to +70C))
- 68-pin PLCC package with socket compatibility (vsPIC16C923T-04I/PT (64-pin TQFP))
Ghi chú thiết kế
The PIC16C923T-04I/L uses OTP EPROM, not Flash. Once programmed, firmware cannot be electrically erased or updated. Plan firmware versions carefully and validate code thoroughly before production programming. For prototypes, use the PIC16F946-I/L (Flash) which has the same 68-pin PLCC pinout and is otherwise drop-in compatible.
The 68-pin PLCC (J-lead) package has a 0.050 inch (1.27 mm) lead pitch. Use a socketed PLCC footprint during prototyping so you can swap OTP devices during development. For production, the J-leads are solder-reflow compatible but require careful pad design to prevent solder wicking up the J-lead; follow IPC-7351 PLCC land pattern guidelines.
Decouple VDD (pin 20) with a 100 nF ceramic capacitor placed within 5 mm of the pin, plus a bulk 10 uF tantalum or aluminum-polymer capacitor on the same supply rail. The LCD charge pump generates significant transient current on VLCD pins (64-66); place 100 nF capacitors on each VLCD pin per the datasheet's LCD bias network recommendations. Without proper decoupling, LCD segments may show ghosting or contrast drift.
Thông tin tuân thủ
RoHS and lead-free per Microchip product page. Not AEC-Q100 qualified - this part is not automotive-grade. Industrial -40C to +85C temperature range only. Halogen-free status not explicitly stated in vendor data.
