PIC16C923T-08I/PT - 8-Bit OTP MCU w/ LCD Driver, 8MHz, TQFP-64 | Microchip
部品番号: PIC16C923T-08I/PT ✗ 生産終了| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $16.2 | $162.00 |
| 100 | $13.95 | $1,395.00 |
| 500 | $12.1 | $6,050.00 |
| 1,000 | $10.5 | $10,500.00 |
PIC16C923T-08I/PT 概要
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.
ドロップイン代替品: PIC16C923T-08I/PT — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: PIC16C923T-08I/PT （同一形状・フットプリント） — 相違点: Instruction Cycle Time, LCD Driver, Timers, Watchdog Timer, Operating Temperature.
クイック比較ツール — 並列比較する代替部品を選択:
PIC16F946-I/PT
✅ ドロップイン📋 参考代替品（カタログ未掲載）
PIC16F917-I/PT
✅ ドロップイン✓ 在庫あり
$2.71 / 個
データシートを見る →PIC16F914-I/PT
✅ ドロップイン✓ 在庫あり
$2.98 / 個
データシートを見る →PIC16C923T-08I/L
✅ ドロップイン✓ 在庫あり
$5.4 / 個
データシートを見る →PIC16C923-08I/PT
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
PIC16C923T-08I/PT 最大定格＆電気的特性
| 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) |
| 最大クロック周波数 | 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) |
| 動作温度 | -40C to +85C (Industrial - 'I' suffix) |
| パッケージ | 64-pin TQFP (PT) |
| 実装タイプ | Surface Mount |
PIC16C923T-08I/PT ピン構成
| ピン 1 | SEG31/RF7 — LCD segment 31 or GPIO RF7 |
| ピン 2 | SEG30/RF6 — LCD segment 30 or GPIO RF6 |
| ピン 3 | SEG29/RF5 — LCD segment 29 or GPIO RF5 |
| ピン 4 | SEG28/RF4 — LCD segment 28 or GPIO RF4 |
| ピン 5 | SEG27/RF3 — LCD segment 27 or GPIO RF3 |
| ピン 6 | SEG26/RF2 — LCD segment 26 or GPIO RF2 |
| ピン 7 | SEG25/RF1 — LCD segment 25 or GPIO RF1 |
| ピン 8 | SEG24/RF0 — LCD segment 24 or GPIO RF0 |
| ピン 9 | AVDD — Analog power supply |
| ピン 10 | AVSS — Analog ground |
| ピン 11 | SEG23/RE2 — LCD segment 23 or GPIO RE2 |
| ピン 12 | SEG22/RE1 — LCD segment 22 or GPIO RE1 |
| ピン 13 | SEG21/RE0 — LCD segment 21 or GPIO RE0 |
| ピン 14 | OSC1/CLKI — Crystal oscillator input / external clock |
| ピン 15 | OSC2/CLKO — Crystal oscillator output |
| ピン 16 | VLCD1 — LCD voltage 1 (bias generation) |
| ピン 17 | VLCD2 — LCD voltage 2 (bias generation) |
| ピン 18 | VLCD3 — LCD voltage 3 (bias generation) |
| ピン 19 | COM3/RD7 — LCD common 3 or GPIO RD7 |
| ピン 20 | COM2/RD6 — LCD common 2 or GPIO RD6 |
| ピン 21 | COM1/RD5 — LCD common 1 or GPIO RD5 |
| ピン 22 | COM0/RD4 — LCD common 0 or GPIO RD4 |
| ピン 23 | SEG20/RD3 — LCD segment 20 or GPIO RD3 |
| ピン 24 | SEG19/RD2 — LCD segment 19 or GPIO RD2 |
| ピン 25 | SEG18/RD1 — LCD segment 18 or GPIO RD1 |
| ピン 26 | SEG17/RD0 — LCD segment 17 or GPIO RD0 |
| ピン 27 | RC7/RX/DT — GPIO RC7 / USART RX / I2C data |
| ピン 28 | RC6/TX/CK — GPIO RC6 / USART TX / I2C clock |
| ピン 29 | RC5/SDO — GPIO RC5 / SPI data out |
| ピン 30 | RC4/SDI/SDA — GPIO RC4 / SPI data in / I2C data |
| ピン 31 | RC3/SCK/SCL — GPIO RC3 / SPI clock / I2C clock |
| ピン 32 | RC2/CCP1 — GPIO RC2 / CCP1 PWM output |
| ピン 33 | RC1/T1OSI/CCP2 — GPIO RC1 / Timer1 oscillator in / CCP2 |
| ピン 34 | RC0/T1OSO — GPIO RC0 / Timer1 oscillator out |
| ピン 35 | RB7 — GPIO RB7 |
| ピン 36 | RB6 — GPIO RB6 |
| ピン 37 | RB5 — GPIO RB5 |
| ピン 38 | RB4 — GPIO RB4 |
| ピン 39 | RB3/CCP1 — GPIO RB3 / CCP1 alternate |
| ピン 40 | RB2 — GPIO RB2 |
| ピン 41 | RB1 — GPIO RB1 |
| ピン 42 | RB0/INT — GPIO RB0 / external interrupt |
| ピン 43 | VDD — Digital power supply (+5V) |
| ピン 44 | VSS — Digital ground |
| ピン 45 | RA0/AN0 — GPIO RA0 / ADC input 0 |
| ピン 46 | RA1/AN1 — GPIO RA1 / ADC input 1 |
| ピン 47 | RA2/AN2 — GPIO RA2 / ADC input 2 |
| ピン 48 | RA3/AN3/VREF+ — GPIO RA3 / ADC input 3 / VREF+ |
| ピン 49 | RA4/T0CKI — GPIO RA4 / Timer0 clock input |
| ピン 50 | RA5/AN4/SS — GPIO RA5 / ADC input 4 / SPI slave select |
| ピン 51 | SEG16/RG4 — LCD segment 16 or GPIO RG4 |
| ピン 52 | SEG15/RG3 — LCD segment 15 or GPIO RG3 |
| ピン 53 | SEG14/RG2 — LCD segment 14 or GPIO RG2 |
| ピン 54 | SEG13/RG1 — LCD segment 13 or GPIO RG1 |
| ピン 55 | SEG12/RG0 — LCD segment 12 or GPIO RG0 |
| ピン 56 | SEG11 — LCD segment 11 |
| ピン 57 | SEG10 — LCD segment 10 |
| ピン 58 | SEG9 — LCD segment 9 |
| ピン 59 | SEG8 — LCD segment 8 |
| ピン 60 | SEG7 — LCD segment 7 |
| ピン 61 | SEG6 — LCD segment 6 |
| ピン 62 | SEG5 — LCD segment 5 |
| ピン 63 | SEG4 — LCD segment 4 |
| ピン 64 | MCLR/VPP — Master clear reset / programming voltage |
主な用途
PIC16C923T-08I/PT の用途: 6 件s: 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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: PIC16C923T-08I/PT — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | 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 |
主な差別化要因
- Integrated LCD driver eliminates external controller （vs PIC16C773-I/SS (28-pin, no LCD driver))
- Large I/O count with 64-pin TQFP （vs PIC16C770-I/SS (20-pin))
- Flash replacement extends lifecycle （vs PIC16F946-I/PT (active replacement))
設計ノート
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.
コンプライアンス情報
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.
