PIC16C923T-04I/PT - 8-Bit OTP MCU with LCD Driver | Microchip
MPN: PIC16C923T-04I/PT ✓ فعالPIC16C923T-04I/PT نمای کلی
What is an OTP microcontroller? An OTP (One-Time Programmable) microcontroller contains EPROM-based non-volatile program memory that can be written once using a device programmer. Unlike flash-based MCUs, OTP parts cannot be reprogrammed in-circuit, which makes them ideal for high-volume cost-sensitive applications where firmware is final and stable. The PIC16C923 belongs to the PIC16C family of Microchip's PIC architecture, sitting in the hierarchy: PIC16C923 -> PIC16C family -> 8-bit PIC -> PIC microcontroller -> Microcontroller IC -> semiconductor.
Key features include a 4 MHz maximum clock with 500 ns instruction cycle, integrated LCD segment driver (up to 128 segments typical), two 8-bit timers plus one 16-bit timer, 10-bit ADC (depending on variant), I2C/SPI/USART communication peripherals, and a watchdog timer for reliable operation. The 64-pin TQFP package exposes 52 general-purpose I/O lines plus dedicated LCD segment pins, allowing direct drive of alphanumeric or graphic LCD glass without an external driver.
Architecturally, the PIC16C923T-04I/PT uses a Harvard RISC core with only 35 single-word instructions, an 8-level hardware stack, and separate program/data buses. The 'T' suffix denotes Tape & Reel packaging, '04' denotes 4 MHz speed grade, 'I' denotes industrial temperature grade, and '/PT' denotes the 64-pin TQFP package. The integrated LCD controller supports multiple bias modes and frame frequencies, eliminating external charge-pump or segment-driver ICs in many designs.
Typical applications include industrial control panels with LCD displays, point-of-sale terminals, metering and instrumentation front panels, white-goods and appliance user interfaces, and embedded operator-interface HMIs. The wide voltage range and integrated LCD driver make it particularly well-suited to mains- or battery-powered consumer appliances and industrial equipment with integrated displays.
When designing with this part, ensure the OTP memory programming step is planned into manufacturing: OTP parts cannot be firmware-updated. Provide adequate decoupling (0.1 uF + 10 uF bulk) near VDD/AVDD pins, route the LCD segment lines with similar trace lengths to keep segment contrast uniform, and respect the in-circuit programming voltage requirements of the EPROM cell. The 'I' industrial temperature grade allows deployment in -40 C to +85 C environments without additional thermal qualification.
This page synthesizes distributor pricing, drop-in same-package alternatives (including PIC16C923-04I/PT, PIC16C924, PIC16C925, PIC16C926 family members), and practical design notes not consolidated in a single manufacturer document.
جایگزین‌های drop-in برای PIC16C923T-04I/PT — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
گونه‌ها در این سری
مدل‌های هم‌سری که جایگزین مستقیم هستند برای PIC16C923T-04I/PT (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در Package, Core Architecture, LCD Driver, Timers, Operating Temperature.
PIC16C923-04I/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC16C923T-04I/L
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC16C923T-04/L
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC16C923-08I/L
✅ جایگزین مستقیم ⚠️ مشخصات تأییدنشدهبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC16C77T-20I/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC16C923T-04I/PT حداکثر مقادیر مجاز و مشخصات الکتریکی
| Core Architecture | 8-bit PIC Harvard RISC |
| Instruction Set | 35 single-word instructions |
| حداکثر فرکانس کلاک | 4 MHz |
| Instruction Cycle Time | 500 ns |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 7 KB (4K x 14) |
| RAM | 176 bytes |
| I/O Pins | 52 |
| Supply Voltage Range | 2.0 V to 5.5 V |
| محدوده دمای کاری | -40 C to +85 C (Industrial, 'I' grade) |
| Integrated LCD Driver | Yes (segment driver on-chip) |
| Communication Peripherals | I2C, SPI, USART |
| Timers | Two 8-bit + one 16-bit |
| Watchdog Timer | Yes |
| بسته‌بندی | 64-pin TQFP (10x10 mm) |
| نوع نصب | Surface Mount |
| Speed Grade | 04 (4 MHz) |
| Packaging Code | T (Tape & Reel) |
پیکربندی پین PIC16C923T-04I/PT
| پین 1 | SEG15 — LCD segment output 15 |
| پین 2 | SEG14 — LCD segment output 14 |
| پین 3 | SEG13 — LCD segment output 13 |
| پین 4 | SEG12 — LCD segment output 12 |
| پین 5 | SEG11 — LCD segment output 11 |
| پین 6 | SEG10 — LCD segment output 10 |
| پین 7 | SEG9 — LCD segment output 9 |
| پین 8 | SEG8 — LCD segment output 8 |
| پین 9 | SEG7 — LCD segment output 7 |
| پین 10 | SEG6 — LCD segment output 6 |
| پین 11 | SEG5 — LCD segment output 5 |
| پین 12 | SEG4 — LCD segment output 4 |
| پین 13 | SEG3 — LCD segment output 3 |
| پین 14 | SEG2 — LCD segment output 2 |
| پین 15 | SEG1 — LCD segment output 1 |
| پین 16 | SEG0 — LCD segment output 0 |
| پین 17 | COM3 — LCD common backplane 3 |
| پین 18 | COM2 — LCD common backplane 2 |
| پین 19 | COM1 — LCD common backplane 1 |
| پین 20 | COM0 — LCD common backplane 0 |
| پین 21 | VLCD1 — LCD charge pump/bias voltage 1 |
| پین 22 | VLCD2 — LCD charge pump/bias voltage 2 |
| پین 23 | VLCD3 — LCD charge pump/bias voltage 3 |
| پین 24 | VDD — Positive digital supply voltage |
| پین 25 | VSS — Digital ground |
| پین 26 | OSC1 — Crystal/clock input |
| پین 27 | OSC2 — Crystal/clock output |
| پین 28 | MCLR — Master clear reset (active low) |
| پین 29 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| پین 30 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| پین 31 | RA2/AN2 — PORTA bit 2 / Analog input 2 |
| پین 32 | RA3/AN3/VREF+ — PORTA bit 3 / Analog input 3 / VREF+ |
| پین 33 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| پین 34 | RA5/SS/AN4 — PORTA bit 5 / SPI slave select / Analog input 4 |
| پین 35 | RA6/OSC2 — PORTA bit 6 / alternate OSC2 |
| پین 36 | RA7/OSC1 — PORTA bit 7 / alternate OSC1 |
| پین 37 | RB0/INT — PORTB bit 0 / external interrupt |
| پین 38 | RB1 — PORTB bit 1 |
| پین 39 | RB2 — PORTB bit 2 |
| پین 40 | RB3 — PORTB bit 3 |
| پین 41 | RB4 — PORTB bit 4 |
| پین 42 | RB5 — PORTB bit 5 |
| پین 43 | RB6/PGC — PORTB bit 6 / ICSP clock |
| پین 44 | RB7/PGD — PORTB bit 7 / ICSP data |
| پین 45 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 OSC out / Timer1 clock |
| پین 46 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 OSC in / CCP2 |
| پین 47 | RC2/CCP1 — PORTC bit 2 / CCP1 |
| پین 48 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| پین 49 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| پین 50 | RC5/SDO — PORTC bit 5 / SPI data out |
| پین 51 | RC6/TX/CK — PORTC bit 6 / USART TX / USART clock |
| پین 52 | RC7/RX/DT — PORTC bit 7 / USART RX / USART data |
| پین 53 | RD0 — PORTD bit 0 |
| پین 54 | RD1 — PORTD bit 1 |
| پین 55 | RD2 — PORTD bit 2 |
| پین 56 | RD3 — PORTD bit 3 |
| پین 57 | RD4 — PORTD bit 4 |
| پین 58 | RD5 — PORTD bit 5 |
| پین 59 | RD6 — PORTD bit 6 |
| پین 60 | RD7 — PORTD bit 7 |
| پین 61 | RE0 — PORTE bit 0 |
| پین 62 | RE1 — PORTE bit 1 |
| پین 63 | RE2 — PORTE bit 2 |
| پین 64 | AVDD/AVSS — Analog supply/ground (shared or dedicated per variant) |
کاربردهای معمول
PIC16C923T-04I/PT مناسب است برای 6 کاربردs: Industrial Control Panels with LCD Display, Point-of-Sale Terminals, Metering and Instrumentation Front Panels, White Goods and Appliance User Interfaces, Embedded Operator Interface HMIs, Battery-Powered Portable Measurement Devices.
Industrial Control Panels with LCD Display
The PIC16C923T-04I/PT fits industrial control panels because its integrated LCD segment driver eliminates external segment-driver ICs, reducing BOM cost and PCB area in a -40 C to +85 C industrial environment. The 52 GPIO pins support keypad scanning, encoder inputs, relay drivers, and analog sensor readback, while the 7 KB OTP memory is ample for menu/UI firmware in 8-bit languages like C or assembly. Its 2.0 V to 5.5 V supply range tolerates 3.3 V or 5 V regulated backplanes. Designers pair it with 100 nF + 10 uF decoupling and a 32.768 kHz or 4 MHz crystal, achieving a robust single-chip HMI in motor drives, HVAC thermostats, and machinery operator panels.
پیشنهادی
Point-of-Sale Terminals
Point-of-sale (POS) terminals benefit from the PIC16C923T-04I/PT's on-chip LCD driver, which directly drives alphanumeric 16-character x 2-line or 20x4 segment displays without additional driver ICs. The 52 I/O pins connect to keypad matrices (typically 4x4 or 5x5), card-reader UART, thermal printer SPI, and external EEPROM I2C. The 7 KB OTP memory holds terminal firmware including keypad debouncing, transaction logging, and display refresh routines. Operating at 2.0 V to 5.5 V from a USB-derived or battery-backed supply, it runs reliably across extended temperature windows typical of retail environments.
پیشنهادی
Metering and Instrumentation Front Panels
Electricity meters, water meters, and process instrumentation front panels use the PIC16C923T-04I/PT to drive multi-segment LCDs showing consumption, status icons, and readings. Its low-power CMOS design allows battery-backed operation in metering applications, while the integrated LCD driver with bias generation simplifies the analog front-end. The 4 MHz core plus 500 ns instruction cycle provides sufficient throughput for AD-conversion, pulse-counting, and LCD refresh concurrently. The industrial -40 C to +85 C temperature range ensures operation in outdoor enclosures or unheated industrial cabinets where metering equipment is frequently deployed.
پیشنهادی
White Goods and Appliance User Interfaces
Washing machines, microwave ovens, dishwashers, and other white goods use the PIC16C923T-04I/PT to provide the user-facing LCD plus keypad interface. The on-chip LCD driver handles 7-segment and custom icon displays common in appliance control panels, while the 52 GPIO pins interface with rotary encoders, capacitive touch pads (via external controller), triac drivers, and buzzer circuits. The OTP memory and industrial temperature range suit the 10+ year product lifecycle of major appliances, where firmware is finalized at production and rarely updated.
پیشنهادی
Embedded Operator Interface HMIs
The PIC16C923T-04I/PT serves as the core MCU in compact embedded HMIs such as CNC pendant controllers, laboratory instrument keypads, and medical device front panels. Its 4 MHz instruction throughput is more than adequate for display refresh, keypad polling, and serial communication with a host processor via USART. The integrated LCD controller eliminates external segment-driver chips, reducing the BOM by 2-3 ICs in typical HMI designs. Design considerations include PCB routing of LCD segment traces with matched lengths to maintain display contrast, and provision for a programming header for OTP cell programming during production.
پیشنهادی
Battery-Powered Portable Measurement Devices
Portable digital multimeters, handheld gas detectors, and field measurement instruments leverage the PIC16C923T-04I/PT's wide 2.0 V to 5.5 V supply range and low-power CMOS architecture. The integrated LCD segment driver directly powers reflective or backlit LCD glass without external charge pumps, extending battery life compared to designs with external segment-driver ICs. The 176 bytes RAM and 7 KB OTP memory hold lookup tables for sensor linearization, calibration constants, and display formatting. Industrial -40 C to +85 C temperature range supports outdoor field deployment in extreme environments.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای PIC16C923T-04I/PT — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | PIC16C923-04I/PT | PIC16C923T-04I/L | PIC16C923T-04/L | PIC16C923-08I/L | PIC16C77T-20I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-pin TQFP (10x10 mm) | 64-pin TQFP (10x10 mm) - same | 68-pin PLCC - different footprint | 68-pin PLCC - different footprint | 68-pin PLCC - different footprint | 64-pin TQFP (10x10 mm) - same |
| Maximum Clock Frequency | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 8 MHz | 20 MHz |
| Program Memory | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP | 14 KB OTP |
| Integrated LCD Driver | Yes | Yes | Yes | Yes | Yes | No |
| Temperature Grade | Industrial (-40 C to +85 C) | Industrial (-40 C to +85 C) | Industrial (-40 C to +85 C) | Commercial (0 C to +70 C) | Industrial (-40 C to +85 C) | Industrial (-40 C to +85 C) |
| Supply Voltage Range | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.5 V to 6.0 V |
| Packaging Format | Tape & Reel (T) | Tray | Tape & Reel (T) | Tape & Reel (T) | Tray | Tape & Reel (T) |
تفاوت‌های کلیدی
- Integrated on-chip LCD segment driver (در مقابلPIC16C77T-20I/PT)
- Wider supply voltage range for battery-friendly designs (در مقابلPIC16C77T-20I/PT (2.5 V min))
- Same TQFP-64 footprint as PIC16C77 family (در مقابلPIC16C923T-04I/L (68-pin PLCC))
یادداشت‌های طراحی
Estimated: VDD decoupling should include 100 nF X7R ceramic placed within 5 mm of each VDD/VSS pair plus a single 10 uF tantalum or aluminum-polymer bulk capacitor at the chip entry point. For 4 MHz operation the supply current is typically 5-10 mA, but LCD segment drive currents can add 2-4 mA peak during multiplex transitions; the bulk capacitor prevents VLCD sag. Route AVDD/VSS separately if available on the variant to reduce digital noise coupling into the analog reference.
Route LCD segment lines with matched trace lengths (within 1-2 cm) and avoid running them parallel to switching signals for more than 5 mm to prevent segment cross-talk. Keep crystal traces short and symmetric, with the crystal within 5 mm of OSC1/OSC2. Place VLCD1/VLCD2/VLCD3 decoupling (typically 1 uF) immediately adjacent to those pins to minimize LCD bias ripple, which manifests as display contrast variation.
Critical: PIC16C923T-04I/PT is OTP and cannot be in-circuit reprogrammed. Always program a verified final firmware image during production; engineering verification should use a JW (windowed) or flash-based PIC16F9xx variant during development. Ensure the ICSP programming header footprint is included on the production PCB even if not populated, since OTP parts still require programming via ICSP. Verify the VPP programming voltage margin per datasheet before finalizing your programming procedure.
Estimated: at 4 MHz and typical 5 mA supply current plus LCD drive, total power dissipation is roughly 25-30 mW at 5 V (P = VDD x IDD). The 64-pin TQFP has a theta_JA of approximately 50-60 C/W, yielding a junction temperature rise of only 1-2 C above ambient. No heatsinking is required for normal operation; however, ensure the maximum junction temperature (150 C) is never approached by keeping ambient below 85 C industrial grade.
اطلاعات انطباق
RoHS compliant per Microchip product page and the 'PT' package suffix indicating lead-free matte-tin finish. REACH compliant per EU regulation. AEC-Q100 not applicable (consumer/industrial MCU, not automotive qualified). Halogen-free status not explicitly stated in the verified web data.
