PIC16C923T-08I/PT - 8-Bit OTP MCU w/ LCD Driver, 8MHz, TQFP-64 | Microchip
MPN: PIC16C923T-08I/PT ✗ انتهى عمره الإنتاجيPIC16C923T-08I/PT نظرة عامة
An 8-bit OTP (One-Time-Programmable) microcontroller is a non-volatile MCU whose program memory is implemented as EPROM and can be written only once after erasure by UV light. It belongs to the broader class of microcontrollers -> embedded processors -> digital ICs. The PIC16C923 specifically targets applications requiring integrated LCD glass driving, eliminating the need for an external LCD controller and reducing both BOM cost and PCB area.
Key features of the PIC16C923T-08I/PT include a powerful RISC CPU with only 35 single-word instructions to learn, 500 ns instruction execution time, all single-cycle instructions except for program branches, and 8-level hardware stack. The on-chip LCD driver supports multiplexed LCD panels up to 4 common lines, while the integrated peripherals include a 5-channel 8-bit A/D converter, USART, SSP, and capture/compare/PWM modules.
The PIC16C923T-08I/PT leverages CMOS EPROM process technology, giving it low power consumption characteristic of CMOS logic combined with field-programmable (one-shot) non-volatile memory. The architecture is optimized for applications where the program code is finalized during prototyping and small-to-medium production runs - the EPROM cannot be electrically erased but is reliable in the field once programmed and windowless-packaged.
Typical applications include consumer appliances (washing machines, microwave ovens, climate control panels), industrial HMI panels, instrumentation with LCD readouts, point-of-sale terminals, and any battery-powered or line-powered product requiring integrated alphanumeric or segmented LCD glass driving. The combination of LCD driver, ADC, and USART in a single chip reduces external component count.
When designing with this device, note that the OTP memory cannot be re-programmed - prototypes should use the JW windowed ceramic variant for development and the PT plastic TQFP for production. Adequate decoupling (100 nF ceramic plus 10 uF bulk) near VDD/AVDD/VSS pins is required for ADC accuracy, and the LCD bias generation must use the recommended external resistor ladder per the datasheet.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, enabling faster BOM decisions.
بدائل مباشرة لـ PIC16C923T-08I/PT — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع PIC16C923T-08I/PT (نفس عامل الشكل والبصمة) — يختلف في Instruction Cycle Time, LCD Driver, Timers, Watchdog Timer, Operating Temperature.
PIC16F946-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16F917-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16F914-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16C923T-08I/L
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16C923-08I/PT
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
PIC16C923T-08I/PT الحدود القصوى والخصائص الكهربائية
| Series | PIC® 16C |
| Family | PIC16C923 |
| Core Processor | PIC |
| Core Size | 8-bit |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 7 KB (4K x 14) |
| EEPROM Size | None (OTP only) |
| أقصى تردد للساعة | 8 MHz |
| Instruction Cycle Time | 500 ns (200 ns at 20 MHz - N/A here, 8 MHz only) |
| Number of I/O Pins | 53 (approx.) |
| Supply Voltage (VDD) | 4.0 V to 6.0 V (5V typical) |
| A/D Converter | 8-bit, 5 channels |
| LCD Driver | Yes, integrated |
| USART | Yes |
| SSP (SPI/I2C) | Yes |
| PWM / CCP | Yes |
| Number of Instructions | 35 (single-word) |
| درجة حرارة التشغيل | -40C to +85C (Industrial - 'I' suffix) |
| العلبة | 64-pin TQFP (PT) |
| نوع التركيب | Surface Mount |
تكوين أطراف PIC16C923T-08I/PT
| دبوس 1 | SEG31/RF7 — LCD segment 31 or GPIO RF7 |
| دبوس 2 | SEG30/RF6 — LCD segment 30 or GPIO RF6 |
| دبوس 3 | SEG29/RF5 — LCD segment 29 or GPIO RF5 |
| دبوس 4 | SEG28/RF4 — LCD segment 28 or GPIO RF4 |
| دبوس 5 | SEG27/RF3 — LCD segment 27 or GPIO RF3 |
| دبوس 6 | SEG26/RF2 — LCD segment 26 or GPIO RF2 |
| دبوس 7 | SEG25/RF1 — LCD segment 25 or GPIO RF1 |
| دبوس 8 | SEG24/RF0 — LCD segment 24 or GPIO RF0 |
| دبوس 9 | AVDD — Analog power supply |
| دبوس 10 | AVSS — Analog ground |
| دبوس 11 | SEG23/RE2 — LCD segment 23 or GPIO RE2 |
| دبوس 12 | SEG22/RE1 — LCD segment 22 or GPIO RE1 |
| دبوس 13 | SEG21/RE0 — LCD segment 21 or GPIO RE0 |
| دبوس 14 | OSC1/CLKI — Crystal oscillator input / external clock |
| دبوس 15 | OSC2/CLKO — Crystal oscillator output |
| دبوس 16 | VLCD1 — LCD voltage 1 (bias generation) |
| دبوس 17 | VLCD2 — LCD voltage 2 (bias generation) |
| دبوس 18 | VLCD3 — LCD voltage 3 (bias generation) |
| دبوس 19 | COM3/RD7 — LCD common 3 or GPIO RD7 |
| دبوس 20 | COM2/RD6 — LCD common 2 or GPIO RD6 |
| دبوس 21 | COM1/RD5 — LCD common 1 or GPIO RD5 |
| دبوس 22 | COM0/RD4 — LCD common 0 or GPIO RD4 |
| دبوس 23 | SEG20/RD3 — LCD segment 20 or GPIO RD3 |
| دبوس 24 | SEG19/RD2 — LCD segment 19 or GPIO RD2 |
| دبوس 25 | SEG18/RD1 — LCD segment 18 or GPIO RD1 |
| دبوس 26 | SEG17/RD0 — LCD segment 17 or GPIO RD0 |
| دبوس 27 | RC7/RX/DT — GPIO RC7 / USART RX / I2C data |
| دبوس 28 | RC6/TX/CK — GPIO RC6 / USART TX / I2C clock |
| دبوس 29 | RC5/SDO — GPIO RC5 / SPI data out |
| دبوس 30 | RC4/SDI/SDA — GPIO RC4 / SPI data in / I2C data |
| دبوس 31 | RC3/SCK/SCL — GPIO RC3 / SPI clock / I2C clock |
| دبوس 32 | RC2/CCP1 — GPIO RC2 / CCP1 PWM output |
| دبوس 33 | RC1/T1OSI/CCP2 — GPIO RC1 / Timer1 oscillator in / CCP2 |
| دبوس 34 | RC0/T1OSO — GPIO RC0 / Timer1 oscillator out |
| دبوس 35 | RB7 — GPIO RB7 |
| دبوس 36 | RB6 — GPIO RB6 |
| دبوس 37 | RB5 — GPIO RB5 |
| دبوس 38 | RB4 — GPIO RB4 |
| دبوس 39 | RB3/CCP1 — GPIO RB3 / CCP1 alternate |
| دبوس 40 | RB2 — GPIO RB2 |
| دبوس 41 | RB1 — GPIO RB1 |
| دبوس 42 | RB0/INT — GPIO RB0 / external interrupt |
| دبوس 43 | VDD — Digital power supply (+5V) |
| دبوس 44 | VSS — Digital ground |
| دبوس 45 | RA0/AN0 — GPIO RA0 / ADC input 0 |
| دبوس 46 | RA1/AN1 — GPIO RA1 / ADC input 1 |
| دبوس 47 | RA2/AN2 — GPIO RA2 / ADC input 2 |
| دبوس 48 | RA3/AN3/VREF+ — GPIO RA3 / ADC input 3 / VREF+ |
| دبوس 49 | RA4/T0CKI — GPIO RA4 / Timer0 clock input |
| دبوس 50 | RA5/AN4/SS — GPIO RA5 / ADC input 4 / SPI slave select |
| دبوس 51 | SEG16/RG4 — LCD segment 16 or GPIO RG4 |
| دبوس 52 | SEG15/RG3 — LCD segment 15 or GPIO RG3 |
| دبوس 53 | SEG14/RG2 — LCD segment 14 or GPIO RG2 |
| دبوس 54 | SEG13/RG1 — LCD segment 13 or GPIO RG1 |
| دبوس 55 | SEG12/RG0 — LCD segment 12 or GPIO RG0 |
| دبوس 56 | SEG11 — LCD segment 11 |
| دبوس 57 | SEG10 — LCD segment 10 |
| دبوس 58 | SEG9 — LCD segment 9 |
| دبوس 59 | SEG8 — LCD segment 8 |
| دبوس 60 | SEG7 — LCD segment 7 |
| دبوس 61 | SEG6 — LCD segment 6 |
| دبوس 62 | SEG5 — LCD segment 5 |
| دبوس 63 | SEG4 — LCD segment 4 |
| دبوس 64 | MCLR/VPP — Master clear reset / programming voltage |
التطبيقات النموذجية
PIC16C923T-08I/PT مناسب لـ 6 التطبيقs: Consumer Appliance Control with LCD, Industrial HMI / Instrumentation Panels, Point-of-Sale (POS) Terminals, Medical Device Front Panels (Non-Critical), Remote Sensor / Metering Endpoints, Educational / Hobby Development (with Windowed Variant).
Consumer Appliance Control with LCD
The PIC16C923T-08I/PT is ideal for consumer appliance front panels such as washing machines, microwave ovens, dishwashers, and HVAC thermostats. Its integrated LCD driver supports up to 4 multiplexed commons and many segment lines, eliminating the need for an external LCD controller IC. The 7 KB OTP EPROM holds appliance state-machine firmware comfortably, while the 8-bit ADC reads thermistor or sensor inputs. The 8 MHz clock provides 500 ns instruction execution, fast enough for real-time UI updates and user-input debouncing. Place the IC near the LCD glass with short trace lengths on SEG/COM lines, and add the recommended external resistor ladder for LCD bias generation per the datasheet.
موصى به
Industrial HMI / Instrumentation Panels
The PIC16C923T-08I/PT suits industrial human-machine interface panels and instrumentation readouts that need alphanumeric or segmented LCD displays. Its integrated USART enables RS-232/RS-485 communication with a host PLC or supervisory controller, while the 8-bit ADC monitors analog process variables. The industrial temperature grade (-40C to +85C, 'I' suffix) is rated for factory floor environments. The integrated LCD driver reduces BOM cost by replacing an external LCD controller, and the 64-pin TQFP provides ample I/O for keypad scanning, LED indicators, and buzzer drive. Use optocouplers on the USART lines for galvanic isolation in noisy industrial environments.
موصى به
Point-of-Sale (POS) Terminals
POS terminals benefit from the PIC16C923T-08I/PT integrated LCD driver, which directly drives the customer-facing display without an external controller. The integrated USART interfaces with external peripherals such as barcode scanners, receipt printers, or magnetic-stripe readers. The 7 KB program memory holds basic transaction firmware, and the 8 MHz clock provides responsive user interaction. The 5V supply simplifies interface with traditional 5V LCD glass and peripheral logic. For battery-backed designs, the PIC16F946-I/PT flash variant offers easier firmware updates in the field.
موصى به
Medical Device Front Panels (Non-Critical)
Non-critical medical device front panels such as blood-pressure monitors, glucose meters, and portable diagnostic readouts can use the PIC16C923T-08I/PT for its integrated LCD driver, low power consumption, and 5V operation that simplifies interface with traditional LCD glass. The integrated 8-bit ADC reads sensor inputs directly. Note that critical-care or life-support equipment requires AEC-Q100 or medical-grade certification that EPROM-based PIC16C parts may not carry - check with Microchip for the latest compliance documentation before design-in. For new medical designs, migrate to PIC16F946-I/PT or PIC24/dsPIC families for flash reprogrammability and modern certification.
موصى به
Remote Sensor / Metering Endpoints
Remote sensor endpoints and metering applications (water meters, gas meters, simple environmental sensors) leverage the PIC16C923T-08I/PT low-power CMOS design and integrated LCD readout for displaying measurements locally. The 8-bit ADC reads sensor signals, while the integrated USART or SSP interfaces with external communication modules. The OTP memory is acceptable for fixed-function metering firmware that does not require field updates. For new metering designs, the flash-based PIC16F946-I/PT offers in-field firmware updates for protocol changes or calibration adjustments.
موصى به
Educational / Hobby Development (with Windowed Variant)
The PIC16C923T-08I/PT family is suitable for educational and hobby development when paired with the PIC16C923 JW (windowed) variant for prototyping. The JW ceramic package has a quartz window that allows UV erasure of the EPROM, enabling repeated programming cycles during learning or firmware iteration. Once firmware is finalized, the production build uses the plastic PT (TQFP-64) package for cost-effective field deployment. The 35-instruction RISC architecture is approachable for beginners, and the integrated LCD driver produces satisfying visual feedback on segment displays during experimentation.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ PIC16C923T-08I/PT — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | PIC16F946-I/PT | PIC16F917-I/PT | PIC16F914-I/PT | PIC16C923-08I/PT |
|---|---|---|---|---|---|
| Package | TQFP-64 (PT) | TQFP-64 (PT) - same | TQFP-64 (PT) - same | TQFP-64 (PT) - same | TQFP-64 (PT) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory Type | OTP EPROM (7 KB) | Flash (14 KB) | Flash (14 KB) | Flash (8 KB) | OTP EPROM (7 KB) |
| Maximum Clock Frequency | 8 MHz | 20 MHz | 20 MHz | 20 MHz | 8 MHz |
| Reprogrammable In-Circuit | No (OTP only) | Yes (Flash) | Yes (Flash) | Yes (Flash) | No (OTP only) |
| Integrated LCD Driver | Yes | Yes | Yes | Yes | Yes |
| A/D Converter | 8-bit, 5 channels | 10-bit, 8 channels | 10-bit, 8 channels | 10-bit, 5 channels | 8-bit, 5 channels |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| Lifecycle Status | Obsolete | Active | Active | Active | Obsolete |
أبرز الفروقات
- Integrated LCD driver eliminates external controller (مقابلPIC16C773-I/SS (28-pin, no LCD driver))
- Large I/O count with 64-pin TQFP (مقابلPIC16C770-I/SS (20-pin))
- Flash replacement extends lifecycle (مقابلPIC16F946-I/PT (active replacement))
ملاحظات التصميم
The PIC16C923T-08I/PT uses OTP EPROM memory that cannot be electrically erased. Prototyping with this part in plastic TQFP is wasteful - any firmware bug requires scrapping the device. Use the PIC16C923/JW (windowed ceramic) variant for development, then move to the PT plastic TQFP for production once firmware is finalized. Alternatively, prototype with the flash-based PIC16F946-I/PT (same footprint) and reserve the PIC16C923 for production after firmware lock.
Place a 100 nF ceramic decoupling capacitor as close as possible to each VDD/VSS pin pair, plus a single 10 uF bulk tantalum or ceramic capacitor on the main VDD rail. For ADC accuracy, add a separate 100 nF on AVDD/AVSS and route AVSS back to a clean ground via. AVDD and VDD can be tied together if ADC accuracy is not critical, but separate filtering improves noise performance. The integrated LCD driver adds dynamic current spikes during segment updates - the bulk capacitor must supply these transients without significant droop.
Route the LCD SEG and COM traces as short and direct as possible to minimize capacitive loading on the LCD driver pins. Long traces (>50 mm) cause ghosting and contrast loss on multiplexed LCDs. Keep LCD traces away from switching power supply nodes and high-speed digital signals to avoid coupled noise. The VLCD1/VLCD2/VLCD3 bias generation pins require external resistor ladders per the datasheet - typically three resistors per bias pin - placed close to the IC and bypassing the bias node with a 1 uF to 10 uF capacitor.
The USART and SSP pins (RC4-RC7) share functions with the LCD driver and GPIO - reconfigure these carefully when enabling peripherals. The 5V supply is incompatible with 3.3V peripherals without level shifters. The MCLR reset pin requires a 10 kohm pull-up to VDD; do not leave it floating. The OSC1/OSC2 crystal traces must be short (under 10 mm) with the crystal load capacitors (typically 15-33 pF) placed adjacent to the IC pins.
معلومات الامتثال
PIC16C923T-08I/PT is an obsolete EPROM-based MCU. Specific RoHS/REACH compliance should be verified with Microchip. AEC-Q100 automotive qualification is not applicable to this industrial-grade EPROM part. Conflict minerals compliance per Microchip's standard declaration.
