PIC16C923T-04I/L - 8-bit OTP MCU, 7KB EPROM, LCD Driver | Microchip
Артикул: PIC16C923T-04I/L ✗ Снят с производства| Кол-во | Цена за ед. | Итого |
|---|---|---|
| 1 | $8.42 | $8,42 |
| 10 | $7.56 | $75,60 |
| 100 | $6.74 | $674,00 |
| 500 | $5.98 | $2.990,00 |
| 1.000 | $5.31 | $5.310,00 |
PIC16C923T-04I/L Обзор
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.
Аналоги без доработки для PIC16C923T-04I/L — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Варианты в этой серии
Модели той же серии, совместимые без доработки с PIC16C923T-04I/L (тот же форм-фактор и посадочное место) — отличается по Timers, Program Memory Type, LCD Driver, Package, Watchdog Timer.
Инструмент быстрого сравнения — выберите альтернативные компоненты для сравнения бок о бок:
PIC16C923-04I/L
✅ Прямая замена✓ В наличии
$4.1 / шт.
Открыть даташит →PIC16C923T-04I/PT
✅ Прямая замена✓ В наличии
$8.05 / шт.
Открыть даташит →PIC16C923T-04I/L Максимальные параметры и электрические характеристики
| 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 |
| Рабочая температура | -40 C to +85 C (industrial) |
| Корпус | 68-pin PLCC (J-lead, /L) |
| Тип монтажа | Surface Mount |
| Supply Form | Tape and Reel (T suffix) |
| Статус RoHS | Compliant |
Конфигурация выводов PIC16C923T-04I/L
| Контакт 1 | SEG0 — LCD segment driver / GPIO |
| Контакт 2 | SEG1 — LCD segment driver / GPIO |
| Контакт 3 | SEG2 — LCD segment driver / GPIO |
| Контакт 4 | SEG3 — LCD segment driver / GPIO |
| Контакт 5 | SEG4 — LCD segment driver / GPIO |
| Контакт 6 | SEG5 — LCD segment driver / GPIO |
| Контакт 7 | SEG6 — LCD segment driver / GPIO |
| Контакт 8 | SEG7 — LCD segment driver / GPIO |
| Контакт 9 | SEG8 — LCD segment driver / GPIO |
| Контакт 10 | SEG9 — LCD segment driver / GPIO |
| Контакт 11 | SEG10 — LCD segment driver / GPIO |
| Контакт 12 | SEG11 — LCD segment driver / GPIO |
| Контакт 13 | SEG12 — LCD segment driver / GPIO |
| Контакт 14 | SEG13 — LCD segment driver / GPIO |
| Контакт 15 | SEG14 — LCD segment driver / GPIO |
| Контакт 16 | SEG15 — LCD segment driver / GPIO |
| Контакт 17 | OSC1 — Crystal oscillator input |
| Контакт 18 | OSC2 — Crystal oscillator output |
| Контакт 19 | MCLR — Master clear reset (active low) |
| Контакт 20 | VDD — Positive supply (2.5V-6.0V) |
| Контакт 21 | VSS — Ground |
| Контакт 22 | COM0 — LCD common/backplane driver 0 |
| Контакт 23 | COM1 — LCD common/backplane driver 1 |
| Контакт 24 | COM2 — LCD common/backplane driver 2 |
| Контакт 25 | COM3 — LCD common/backplane driver 3 |
| Контакт 26 | RA0 — GPIO Port A bit 0 |
| Контакт 27 | RA1 — GPIO Port A bit 1 |
| Контакт 28 | RA2 — GPIO Port A bit 2 |
| Контакт 29 | RA3 — GPIO Port A bit 3 |
| Контакт 30 | RA4 — GPIO Port A bit 4 / T0CKI |
| Контакт 31 | RA5 — GPIO Port A bit 5 / SS |
| Контакт 32 | RB0 — GPIO Port B bit 0 / INT |
| Контакт 33 | RB1 — GPIO Port B bit 1 |
| Контакт 34 | RB2 — GPIO Port B bit 2 |
| Контакт 35 | RB3 — GPIO Port B bit 3 |
| Контакт 36 | RB4 — GPIO Port B bit 4 |
| Контакт 37 | RB5 — GPIO Port B bit 5 |
| Контакт 38 | RB6 — GPIO Port B bit 6 / PGC |
| Контакт 39 | RB7 — GPIO Port B bit 7 / PGD |
| Контакт 40 | RC0 — GPIO Port C bit 0 |
| Контакт 41 | RC1 — GPIO Port C bit 1 |
| Контакт 42 | RC2 — GPIO Port C bit 2 |
| Контакт 43 | RC3 — GPIO Port C bit 3 / SCL |
| Контакт 44 | RC4 — GPIO Port C bit 4 / SDA |
| Контакт 45 | RC5 — GPIO Port C bit 5 |
| Контакт 46 | RC6 — GPIO Port C bit 6 |
| Контакт 47 | RC7 — GPIO Port C bit 7 |
| Контакт 48 | RD0 — GPIO Port D bit 0 |
| Контакт 49 | RD1 — GPIO Port D bit 1 |
| Контакт 50 | RD2 — GPIO Port D bit 2 |
| Контакт 51 | RD3 — GPIO Port D bit 3 |
| Контакт 52 | RD4 — GPIO Port D bit 4 |
| Контакт 53 | RD5 — GPIO Port D bit 5 |
| Контакт 54 | RD6 — GPIO Port D bit 6 |
| Контакт 55 | RD7 — GPIO Port D bit 7 |
| Контакт 56 | RE0 — GPIO Port E bit 0 |
| Контакт 57 | RE1 — GPIO Port E bit 1 |
| Контакт 58 | RE2 — GPIO Port E bit 2 |
| Контакт 59 | RE3 — GPIO Port E bit 3 |
| Контакт 60 | RE4 — GPIO Port E bit 4 |
| Контакт 61 | RE5 — GPIO Port E bit 5 |
| Контакт 62 | RE6 — GPIO Port E bit 6 |
| Контакт 63 | RE7 — GPIO Port E bit 7 |
| Контакт 64 | VLCD1 — LCD bias voltage 1 |
| Контакт 65 | VLCD2 — LCD bias voltage 2 |
| Контакт 66 | VLCD3 — LCD bias voltage 3 |
| Контакт 67 | SEG16 — LCD segment driver / GPIO |
| Контакт 68 | SEG17 — LCD segment driver / GPIO |
Типичное применение
PIC16C923T-04I/L подходит для 7 применениеs: 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.
Рекомендуется
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.
Рекомендуется
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.
Рекомендуется
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.
Рекомендуется
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.
Рекомендуется
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.
Рекомендуется
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.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для PIC16C923T-04I/L — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | 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 |
Ключевые отличия
- Tape-and-reel packaging for high-volume SMT assembly (против PIC16C923-04I/L (tray variant))
- Industrial temperature grade -40C to +85C (против PIC16C923-04/L (commercial 0C to +70C))
- 68-pin PLCC package with socket compatibility (против PIC16C923T-04I/PT (64-pin TQFP))
Заметки по проектированию
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.
Информация о соответствии
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.
