PIC16C923T-04I/PT - 8-Bit OTP MCU with LCD Driver | Microchip
MPN: PIC16C923T-04I/PT ✓ Hoạt độngPIC16C923T-04I/PT Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho PIC16C923T-04I/PT — 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/PT (cùng hình factor và footprint) — khác nhau ở Package, Core Architecture, LCD Driver, Timers, Operating Temperature.
PIC16C923-04I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C923T-04I/L
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C923T-04/L
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C923-08I/L
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16C77T-20I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C923T-04I/PT Tỷ lệ tối đa & tính chất điện
| Core Architecture | 8-bit PIC Harvard RISC |
| Instruction Set | 35 single-word instructions |
| Tần số xung maksimum | 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 |
| Khoảng nhiệt độ hoạt động | -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 |
| Hộp | 64-pin TQFP (10x10 mm) |
| Kiểu lắp đặt | Surface Mount |
| Speed Grade | 04 (4 MHz) |
| Packaging Code | T (Tape & Reel) |
Cấu hình chân PIC16C923T-04I/PT
| Chân 1 | SEG15 — LCD segment output 15 |
| Chân 2 | SEG14 — LCD segment output 14 |
| Chân 3 | SEG13 — LCD segment output 13 |
| Chân 4 | SEG12 — LCD segment output 12 |
| Chân 5 | SEG11 — LCD segment output 11 |
| Chân 6 | SEG10 — LCD segment output 10 |
| Chân 7 | SEG9 — LCD segment output 9 |
| Chân 8 | SEG8 — LCD segment output 8 |
| Chân 9 | SEG7 — LCD segment output 7 |
| Chân 10 | SEG6 — LCD segment output 6 |
| Chân 11 | SEG5 — LCD segment output 5 |
| Chân 12 | SEG4 — LCD segment output 4 |
| Chân 13 | SEG3 — LCD segment output 3 |
| Chân 14 | SEG2 — LCD segment output 2 |
| Chân 15 | SEG1 — LCD segment output 1 |
| Chân 16 | SEG0 — LCD segment output 0 |
| Chân 17 | COM3 — LCD common backplane 3 |
| Chân 18 | COM2 — LCD common backplane 2 |
| Chân 19 | COM1 — LCD common backplane 1 |
| Chân 20 | COM0 — LCD common backplane 0 |
| Chân 21 | VLCD1 — LCD charge pump/bias voltage 1 |
| Chân 22 | VLCD2 — LCD charge pump/bias voltage 2 |
| Chân 23 | VLCD3 — LCD charge pump/bias voltage 3 |
| Chân 24 | VDD — Positive digital supply voltage |
| Chân 25 | VSS — Digital ground |
| Chân 26 | OSC1 — Crystal/clock input |
| Chân 27 | OSC2 — Crystal/clock output |
| Chân 28 | MCLR — Master clear reset (active low) |
| Chân 29 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| Chân 30 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| Chân 31 | RA2/AN2 — PORTA bit 2 / Analog input 2 |
| Chân 32 | RA3/AN3/VREF+ — PORTA bit 3 / Analog input 3 / VREF+ |
| Chân 33 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Chân 34 | RA5/SS/AN4 — PORTA bit 5 / SPI slave select / Analog input 4 |
| Chân 35 | RA6/OSC2 — PORTA bit 6 / alternate OSC2 |
| Chân 36 | RA7/OSC1 — PORTA bit 7 / alternate OSC1 |
| Chân 37 | RB0/INT — PORTB bit 0 / external interrupt |
| Chân 38 | RB1 — PORTB bit 1 |
| Chân 39 | RB2 — PORTB bit 2 |
| Chân 40 | RB3 — PORTB bit 3 |
| Chân 41 | RB4 — PORTB bit 4 |
| Chân 42 | RB5 — PORTB bit 5 |
| Chân 43 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Chân 44 | RB7/PGD — PORTB bit 7 / ICSP data |
| Chân 45 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 OSC out / Timer1 clock |
| Chân 46 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 OSC in / CCP2 |
| Chân 47 | RC2/CCP1 — PORTC bit 2 / CCP1 |
| Chân 48 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Chân 49 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Chân 50 | RC5/SDO — PORTC bit 5 / SPI data out |
| Chân 51 | RC6/TX/CK — PORTC bit 6 / USART TX / USART clock |
| Chân 52 | RC7/RX/DT — PORTC bit 7 / USART RX / USART data |
| Chân 53 | RD0 — PORTD bit 0 |
| Chân 54 | RD1 — PORTD bit 1 |
| Chân 55 | RD2 — PORTD bit 2 |
| Chân 56 | RD3 — PORTD bit 3 |
| Chân 57 | RD4 — PORTD bit 4 |
| Chân 58 | RD5 — PORTD bit 5 |
| Chân 59 | RD6 — PORTD bit 6 |
| Chân 60 | RD7 — PORTD bit 7 |
| Chân 61 | RE0 — PORTE bit 0 |
| Chân 62 | RE1 — PORTE bit 1 |
| Chân 63 | RE2 — PORTE bit 2 |
| Chân 64 | AVDD/AVSS — Analog supply/ground (shared or dedicated per variant) |
Ứng dụng tiêu biểu
PIC16C923T-04I/PT phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16C923T-04I/PT — 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/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) |
Bảo phân biệt quan trọng
- Integrated on-chip LCD segment driver (vsPIC16C77T-20I/PT)
- Wider supply voltage range for battery-friendly designs (vsPIC16C77T-20I/PT (2.5 V min))
- Same TQFP-64 footprint as PIC16C77 family (vsPIC16C923T-04I/L (68-pin PLCC))
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.
