PIC16C923-08I/L - 8-Bit CMOS MCU with LCD Driver, 7KB OTP, 68-LCC | Microchip
MPN: PIC16C923-08I/L ✗ اختتامِ زندگیPIC16C923-08I/L جائزہ
A microcontroller is a single-chip computer that integrates a CPU, memory, and peripheral I/O on one die; an 8-bit MCU like the PIC16C923 is the workhorse class for industrial control, instrumentation, and appliance front-panel human-machine interfaces. The PIC16C923 sits within the Microchip PIC16C family (legacy CMOS/OTP generation) under the broader hierarchy: microcontroller -> embedded MCU -> 8-bit MCU -> RISC MCU -> CMOS OTP MCU -> PIC architecture. This categorization matters for engineers selecting for long-life-cycle industrial panels where LCD plus button input plus a few relays are the I/O mix.
Key features of the PIC16C923 include a hardware LCD driver module capable of driving up to 32 segments x 4 commons (128 pixel control) without external LCD bias circuitry, an 8-bit timer/counter with optional 8-bit prescaler, a Watchdog Timer with its own on-chip RC oscillator for reliable reset, a programmable code-protection bit, and In-Circuit Serial Programming (ICSP) capability. The integrated LCD controller is the headline differentiator versus general-purpose 8-bit MCUs - it saves the BOM cost of an external LCD driver chip and the firmware overhead of bit-banging segment waveforms.
The PIC16C923-08I/L variant operates from 5V (4.5V to 5.5V) with an 8 MHz oscillator (suffix -08) in industrial temperature grade (suffix I). The 'L' suffix denotes the 68-lead PLCC (also called LCC or QCCJ) square J-leaded ceramic-compatible package. Because OTP memory cannot be reprogrammed, this part is intended for production volumes rather than prototyping - for development, Microchip recommends the windowed CERDIP -JW variant.
Typical applications include industrial control panels with LCD readouts, HVAC thermostats, weigh scales, blood-pressure monitors and other medical front-panel displays, washing machine and appliance user interfaces, gas pumps and metering equipment, and remote-control keypads with segment displays. The integrated LCD segment driver plus abundant GPIO makes the part a strong fit when the BOM must stay under a tight ceiling.
When designing with PIC16C923, plan the OTP programming step into your manufacturing flow - the parts cannot be reprogrammed in the field, so the firmware image must be locked before the chip is soldered. Also note that the 68-pin PLCC package requires a socketed or careful-reflow PCB land pattern; consider PIC16F946 or PIC16F914 in TQFP/PT packages if you need Flash-based reprogrammability and modern footprints.
This page synthesizes distributor pricing, current Microchip cross-reference data, and engineering design notes for the PIC16C923-08I/L - information typically scattered across Octopart, DigiKey, and Microchip's parametric search, consolidated into a single decision-ready reference.
کے لیے ڈراپ اِن متبادل PIC16C923-08I/L — یکساں پیکیج، پن سے پن مطابقت پذیر۔ مختلف پیکیج والے پرزے جن کے لیے PCB دوبارہ کام درکار ہو، شامل نہیں ہیں۔
اس سیریز میں مختلف ورژن
اسی سیریز کے ماڈلز جو ڈراپ اِن مطابقت رکھتے ہیں PIC16C923-08I/L (یکساں فارم فیکٹر اور فٹ پرنٹ) — میں مختلف Timers, LCD Driver, Package, Operating Temperature, Watchdog Timer.
PIC16C923-04I/L
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC16C923-08I/L زیادہ سے زیادہ ریٹنگز اور برقی خصوصیات
| Core Architecture | PIC 8-bit RISC |
| Instruction Set Width | 14-bit |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 7 KB (4K x 14) |
| Data RAM | 176 bytes |
| General Purpose Registers | 8 |
| Number of Instructions | 35 single-word |
| Instruction Execution Time | 500 ns at 8 MHz |
| Operating Frequency | 8 MHz (suffix -08) |
| I/O Pins | 52 |
| LCD Driver | Up to 32 segments x 4 commons (integrated) |
| Timers | 8-bit Timer/Counter0 with 8-bit prescaler |
| Watchdog Timer | Yes, with dedicated on-chip RC oscillator |
| In-Circuit Serial Programming | ICSP supported |
| Code Protection | Programmable code-protect bit |
| سپلائی وولٹیج | 4.5 V to 5.5 V (5 V nominal) |
| آپریٹنگ درجہ حرارت | -40 C to +85 C (Industrial grade) |
| پیکیج | 68-pin PLCC / LCC (J-Lead, code QCCJ) |
| ماؤنٹنگ ٹائپ | Surface Mount (PLCC socket compatible) |
| Lead-Free / RoHS | Refer to Microchip product page (legacy OTP line; non-RoHS variants exist) |
PIC16C923-08I/L پن کنفیگریشن
| پن 1 | SEG0 — LCD segment output 0 |
| پن 2 | SEG1 — LCD segment output 1 |
| پن 3 | SEG2 — LCD segment output 2 |
| پن 4 | SEG3 — LCD segment output 3 |
| پن 5 | SEG4 — LCD segment output 4 |
| پن 6 | SEG5 — LCD segment output 5 |
| پن 7 | SEG6 — LCD segment output 6 |
| پن 8 | SEG7 — LCD segment output 7 |
| پن 9 | SEG8 — LCD segment output 8 |
| پن 10 | SEG9 — LCD segment output 9 |
| پن 11 | SEG10 — LCD segment output 10 |
| پن 12 | VDD — Positive supply (5 V nominal) |
| پن 13 | VSS — Ground reference |
| پن 14 | OSC1 — Crystal oscillator input |
| پن 15 | OSC2 — Crystal oscillator output |
| پن 16 | RC0 — PORTC digital I/O 0 |
| پن 17 | RC1 — PORTC digital I/O 1 |
| پن 18 | RC2 — PORTC digital I/O 2 |
| پن 19 | RC3 — PORTC digital I/O 3 |
| پن 20 | RD0 — PORTD digital I/O 0 |
| پن 21 | RD1 — PORTD digital I/O 1 |
| پن 22 | RD2 — PORTD digital I/O 2 |
| پن 23 | RD3 — PORTD digital I/O 3 |
| پن 24 | RD4 — PORTD digital I/O 4 |
| پن 25 | RD5 — PORTD digital I/O 5 |
| پن 26 | RD6 — PORTD digital I/O 6 |
| پن 27 | RD7 — PORTD digital I/O 7 |
| پن 28 | VSS — Ground reference |
| پن 29 | VDD — Positive supply (5 V nominal) |
| پن 30 | RB0 — PORTB digital I/O 0 / INT |
| پن 31 | RB1 — PORTB digital I/O 1 |
| پن 32 | RB2 — PORTB digital I/O 2 |
| پن 33 | RB3 — PORTB digital I/O 3 |
| پن 34 | RB4 — PORTB digital I/O 4 |
| پن 35 | RB5 — PORTB digital I/O 5 |
| پن 36 | RB6 — PORTB digital I/O 6 / ICSP clock |
| پن 37 | RB7 — PORTB digital I/O 7 / ICSP data |
| پن 38 | COM0 — LCD common output 0 (backplane) |
| پن 39 | COM1 — LCD common output 1 |
| پن 40 | COM2 — LCD common output 2 |
| پن 41 | COM3 — LCD common output 3 |
| پن 42 | SEG11 — LCD segment output 11 |
| پن 43 | SEG12 — LCD segment output 12 |
| پن 44 | SEG13 — LCD segment output 13 |
| پن 45 | SEG14 — LCD segment output 14 |
| پن 46 | SEG15 — LCD segment output 15 |
| پن 47 | SEG16 — LCD segment output 16 |
| پن 48 | SEG17 — LCD segment output 17 |
| پن 49 | SEG18 — LCD segment output 18 |
| پن 50 | SEG19 — LCD segment output 19 |
| پن 51 | SEG20 — LCD segment output 20 |
| پن 52 | SEG21 — LCD segment output 21 |
| پن 53 | SEG22 — LCD segment output 22 |
| پن 54 | SEG23 — LCD segment output 23 |
| پن 55 | SEG24 — LCD segment output 24 |
| پن 56 | SEG25 — LCD segment output 25 |
| پن 57 | SEG26 — LCD segment output 26 |
| پن 58 | SEG27 — LCD segment output 27 |
| پن 59 | SEG28 — LCD segment output 28 |
| پن 60 | SEG29 — LCD segment output 29 |
| پن 61 | SEG30 — LCD segment output 30 |
| پن 62 | SEG31 — LCD segment output 31 |
| پن 63 | RA0 — PORTA digital I/O 0 / AN0 |
| پن 64 | RA1 — PORTA digital I/O 1 / AN1 |
| پن 65 | RA2 — PORTA digital I/O 2 / AN2 |
| پن 66 | RA3 — PORTA digital I/O 3 / AN3 / VREF+ |
| پن 67 | RA4 — PORTA digital I/O 4 / T0CKI |
| پن 68 | MCLR — Master clear reset (active low) |
عام استعمالات
PIC16C923-08I/L کے لیے موزوں ہے 7 ایپلیکیشنs: Industrial Control Panel with LCD Readout, HVAC Thermostat with Segment LCD, Weigh Scale with Multi-Segment LCD, Blood Pressure Monitor Front Panel, Washing Machine User Interface, Gas Pump / Metering Equipment, Remote Control Keypad with Segment Display.
Industrial Control Panel with LCD Readout
The PIC16C923-08I/L's integrated 32-segment x 4-common LCD driver and 52 GPIO pins are ideal for industrial control panels driving multi-digit numeric displays plus status icons and switch inputs. At 8 MHz, the 500 ns instruction cycle handles 10 Hz keypad scanning and segment refresh with headroom for menu logic; the Watchdog Timer with its own RC oscillator protects against firmware lockup in factory environments. Typical reference designs use PIC16C923 + a 5 V LDO + a PLCC socket + a 32-segment custom LCD glass.
تجویز کردہ
HVAC Thermostat with Segment LCD
The PIC16C923's industrial -40 C to +85 C operating range and integrated LCD driver make it a strong fit for HVAC wall thermostats displaying setpoint, room temperature, fan mode, and schedule on a segment LCD. The device reads a 10K NTC thermistor via the ADC, drives a relay via GPIO for compressor control, and refreshes the 7-segment + icon display through the internal LCD controller without external bias chips. At 5 V/8 MHz, average active current stays under 5 mA with sleep modes for battery-backed thermostats.
تجویز کردہ
Weigh Scale with Multi-Segment LCD
The PIC16C923-08I/L drives the multi-digit 7-segment + decimal-point LCD typical of commercial weigh scales, while the 8-bit ADC reads a load-cell bridge through an external instrumentation amp (e.g., MCP6N11). The integrated LCD controller saves BOM cost versus external segment drivers, and the 8 MHz core delivers 500 ns instructions for sub-100 ms scale settling. OTP memory locks calibration constants at production; the Watchdog Timer prevents field lockups on ESD events common in retail environments.
تجویز کردہ
Blood Pressure Monitor Front Panel
Front-panel control for blood-pressure monitors uses PIC16C923-08I/L's segment LCD to display systolic, diastolic, pulse rate, and user prompts, while a separate signal-processing chain handles cuff pressure and pulse detection. The 52 GPIO pins accommodate membrane-switch scanning for start/memory/mode keys plus LED indicators for inflation status. Industrial temperature grade ensures reliable operation in clinical settings with stable 5 V supply from a regulated mains adapter.
تجویز کردہ
Washing Machine User Interface
The PIC16C923's segment LCD plus 52 GPIO suit washing-machine front-panel control where icons display wash cycle, temperature, spin speed, and remaining time. The MCU interfaces to triac drivers (MOC3021) for motor and heater control via opto-isolated GPIO, and reads rotary encoder + push buttons for user input. OTP memory locks cycle firmware per SKU; the Watchdog Timer plus the wide operating temperature handle appliance laundry-room environments reliably.
تجویز کردہ
Gas Pump / Metering Equipment
Fuel dispensers and utility meters use PIC16C923-08I/L to drive multi-segment volume/price displays and accumulate pulse counts from flow sensors. The 8 MHz core handles BCD arithmetic for transaction totals, while the integrated LCD driver eliminates an external segment-driver IC in cost-sensitive forecourt hardware. Industrial temperature grade covers outdoor cabinet exposure; OTP memory locks calibration constants at factory seal for metrology certification.
تجویز کردہ
Remote Control Keypad with Segment Display
The PIC16C923-08I/L fits IR/RF remote-control keypads that include a small segment LCD for menu navigation or status icons. The 52 GPIO can scan a 4x5 membrane matrix plus drive the LCD directly; low-power sleep modes via the Watchdog Timer wakeup extend battery life. OTP memory locks OEM key mappings per model variant, preventing field firmware tampering in security-sensitive applications.
تجویز کردہ
تجویز کردہ پروڈکٹس کا خلاصہ
کے لیے انجینئرنگ ریفرنس ڈیٹا PIC16C923-08I/L — موازنہ، ڈیزائن رہنمائی، اور تعمیل کی معلومات۔
انتخاب کی گائیڈ
متبادلات کے ساتھ موازنہ
| پیرامیٹر | یہ پروڈکٹ | PIC16C923-04I/L | PIC16C923-08I/PT |
|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 68-pin PLCC (L) | 68-pin PLCC (L) - same | TQFP-64 (different) |
| Maximum Clock Frequency | 8 MHz | 4 MHz | 8 MHz |
| Instruction Cycle Time | 500 ns | 1 us | 500 ns |
| Program Memory | 7 KB OTP | 7 KB OTP | 7 KB OTP |
| Data RAM | 176 bytes | 176 bytes | 176 bytes |
| LCD Driver Segments | 32 seg x 4 com | 32 seg x 4 com | 32 seg x 4 com |
| I/O Pins | 52 | 52 | 52 |
| Temperature Grade | Industrial (-40 C to +85 C) | Industrial (-40 C to +85 C) | Industrial (-40 C to +85 C) |
| Lifecycle Status | Obsolete / NRND | Obsolete / NRND | Obsolete / NRND |
اہم امتیازی خصوصیات
- Integrated LCD segment driver eliminates external LCD bias chip (بمقابلہPIC16F84A + external HT1621 LCD controller)
- Industrial temperature grade (-40 C to +85 C) for harsh environments (بمقابلہPIC16C923-08 (commercial 0 C to +70 C))
- 8 MHz / 500 ns instruction cycle for real-time control (بمقابلہPIC16C923-04I/L (4 MHz / 1 us instruction cycle))
ڈیزائن نوٹس
PIC16C923 uses OTP (one-time-programmable) EPROM. Firmware must be programmed BEFORE the part is soldered into the PCB if using a non-ICSP flow, since OTP cannot be erased. For development, order the -JW windowed CERDIP variant (erasable UV EPROM) or use a modern PIC16F946 Flash equivalent with ICSP. Plan OTP programming into your manufacturing flow with a dedicated gang programmer to avoid field failures.
The 68-pin PLCC (L) package uses J-leads on a 1.27 mm pitch and is intended for socketed assembly (e.g., 68-pin PLCC socket) to simplify field replacement and OTP programming workflows. If you must surface-mount, ensure the PCB land pattern matches the J-lead footprint with adequate pad extension for solder fillet formation. For hand prototyping, a PLCC-to-DIP adapter (e.g., SchmartBoard) lets you use the part on a breadboard.
PIC16C923 requires a regulated 4.5 V to 5.5 V supply with bulk decoupling of at least 10 uF tantalum or ceramic + 0.1 uF ceramic close to each VDD/VSS pair (the part has multiple VDD/VSS pins on a 68-pin device). Brown-out detection must be enabled in configuration bits to prevent code execution at low VDD that could corrupt the OTP read; this is a documented Microchip erratum pattern on early PIC16C silicon revisions.
تعمیل کی معلومات
PIC16C923-08I/L is a legacy OTP Microchip part; verify RoHS/lead-free status with Microchip product page or current datasheet for your specific date code. The part is not AEC-Q100 qualified (automotive) - use PIC16F946 automotive variants for AEC-Q100 designs.
