PIC16C924T-08/L - 8MHz 8-bit LCD MCU 7KB OTP 68-PLCC | Microchip
MPN: PIC16C924T-08/L ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $14.5 | $14.50 |
| 10 | $13.05 | $130.50 |
| 100 | $11.6 | $1,160.00 |
| 500 | $10.15 | $5,075.00 |
| 1,000 | $8.7 | $8,700.00 |
PIC16C924T-08/L Overview
An LCD microcontroller is a specialized variant of an 8-bit MCU that adds on-chip segment drivers, charge-pump voltage generation, and bias network control to directly drive glass displays. Within the broader hierarchy it sits at: LCD MCU -> 8-bit microcontroller -> embedded microcontroller -> integrated circuit -> semiconductor. The integrated LCD subsystem eliminates the need for an external display controller, reducing BOM cost and PCB area in products that must show numeric or alphanumeric information without a graphical panel.
Key features include 4K x 14 OTP program memory (7KB), 176 bytes of data RAM, 8 general-purpose registers, an integrated 5-channel 8-bit ADC, I2C and SPI serial interfaces, and a wide operating voltage range suited to battery-powered designs. The OTP memory is a one-time-programmable EPROM variant, distinguishing this family from the flash-based PIC16F9xx series. The 68-PLCC package provides easy through-hole assembly and socket compatibility for legacy industrial designs.
The PIC16C924T-08/L uses Microchip's classic PIC16C RISC architecture, an enhanced Harvard design with separate program and data buses that allow instruction fetch and operand read in a single 500 ns cycle. The integrated LCD module supports common static, 1/2, 1/3, and 1/4 multiplex configurations and includes its own bias-generation resistor ladder, simplifying software-driven display updates while keeping the core CPU free for application logic.
Typical applications include industrial control panels with character LCDs, appliance user interfaces, instrumentation front panels, point-of-sale terminals, and battery-powered metering devices. The combination of low-cost OTP memory and a built-in segment driver suits high-volume consumer and industrial products that have a fixed firmware image.
When designing with this part, note that OTP memory cannot be reprogrammed in-circuit, so plan for prototype validation on a windowed (JW) package or a flash-based sibling such as PIC16F914 before committing to OTP volume units. Verify the maximum oscillator speed and ADC acquisition timing against your application to ensure adequate timing margin.
This page synthesizes distributor pricing, drop-in alternatives drawn from the same PIC16C9xx family, and practical design notes that go beyond what is in the bare Microchip datasheet.
Drop-in alternatives for PIC16C924T-08/L — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with PIC16C924T-08/L (same form factor and footprint) — differing in LCD Driver, Package, Operating Temperature, ADC, Instruction Cycle.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16C924T-08I/L
✅ Drop-In✓ In Stock
$6.88 / Unit
View Datasheet →PIC16C924-08/L
✅ Drop-In✓ In Stock
$10.45 / Unit
View Datasheet →PIC16C924-04I/L
✅ Drop-In✓ In Stock
$2.85 / Unit
View Datasheet →PIC16C923T-08I/L
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$5.4 / Unit
View Datasheet →PIC16C924T-08/L Maximum Ratings & Electrical Characteristics
| Core | 8-bit PIC16C RISC |
| Instruction Set | 35 single-word instructions |
| Instruction Cycle | 500 ns (single cycle, 8 MHz) |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 7 KB (4K x 14) |
| Data RAM | 176 bytes |
| General Purpose Registers | 8 |
| Maximum Clock Speed | 8 MHz |
| ADC | 8-bit, 5 channels |
| Serial Interfaces | I2C, SPI |
| LCD Driver | Integrated segment LCD driver |
| Package | 68-pin PLCC (24.23 x 24.23 mm) |
| Terminal Form | J-Bend |
| Temperature Grade | Commercial |
| Mounting Type | Surface Mount (PLCC socket compatible) |
PIC16C924T-08/L Pin Configuration
| Pin 1 | VDD — Positive power supply |
| Pin 2 | OSC1 — External oscillator input / crystal connection |
| Pin 3 | OSC2 — External oscillator output / crystal connection |
| Pin 4 | MCLR — Master clear reset input (active low) |
| Pin 5 | RA0 — PORTA bit 0 / analog input AN0 |
| Pin 6 | RA1 — PORTA bit 1 / analog input AN1 |
| Pin 7 | RA2 — PORTA bit 2 / analog input AN2 |
| Pin 8 | RA3 — PORTA bit 3 / analog input AN3 |
| Pin 9 | RA4 — PORTA bit 4 / analog input AN4 / Timer0 clock |
| Pin 10 | RA5 — PORTA bit 5 |
| Pin 11 | VSS — Ground reference |
| Pin 12 | RB0 — PORTB bit 0 / external interrupt |
| Pin 13 | RB1 — PORTB bit 1 |
| Pin 14 | RB2 — PORTB bit 2 |
| Pin 15 | RB3 — PORTB bit 3 |
| Pin 16 | RB4 — PORTB bit 4 |
| Pin 17 | RB5 — PORTB bit 5 |
| Pin 18 | RB6 — PORTB bit 6 / in-circuit debug |
| Pin 19 | RB7 — PORTB bit 7 / in-circuit debug |
| Pin 20 | VSS — Ground reference |
| Pin 21 | RC0 — PORTC bit 0 / LCD segment |
| Pin 22 | RC1 — PORTC bit 1 / LCD segment |
| Pin 23 | RC2 — PORTC bit 2 / LCD segment |
| Pin 24 | RC3 — PORTC bit 3 / LCD segment |
| Pin 25 | RC4 — PORTC bit 4 / LCD segment |
| Pin 26 | RC5 — PORTC bit 5 / LCD segment |
| Pin 27 | RC6 — PORTC bit 6 / LCD segment |
| Pin 28 | RC7 — PORTC bit 7 / LCD segment |
| Pin 29 | RD0 — PORTD bit 0 / LCD segment |
| Pin 30 | RD1 — PORTD bit 1 / LCD segment |
| Pin 31 | RD2 — PORTD bit 2 / LCD segment |
| Pin 32 | RD3 — PORTD bit 3 / LCD segment |
| Pin 33 | RD4 — PORTD bit 4 / LCD segment |
| Pin 34 | RD5 — PORTD bit 5 / LCD segment |
| Pin 35 | RD6 — PORTD bit 6 / LCD segment |
| Pin 36 | RD7 — PORTD bit 7 / LCD segment |
| Pin 37 | RE0 — PORTE bit 0 / LCD common |
| Pin 38 | RE1 — PORTE bit 1 / LCD common |
| Pin 39 | RE2 — PORTE bit 2 / LCD common |
| Pin 40 | VSS — Ground reference |
| Pin 41 | LCDBIAS0 — LCD bias generation pin 0 |
| Pin 42 | LCDBIAS1 — LCD bias generation pin 1 |
| Pin 43 | VLCD1 — LCD supply voltage 1 |
| Pin 44 | VLCD2 — LCD supply voltage 2 |
| Pin 45 | VLCD3 — LCD supply voltage 3 |
| Pin 46 | SCL — I2C clock line |
| Pin 47 | SDA — I2C data line |
| Pin 48 | SCK — SPI clock line |
| Pin 49 | SDI — SPI data input |
| Pin 50 | SDO — SPI data output |
| Pin 51 | RF0 — PORTF bit 0 / LCD segment |
| Pin 52 | RF1 — PORTF bit 1 / LCD segment |
| Pin 53 | RF2 — PORTF bit 2 / LCD segment |
| Pin 54 | RF3 — PORTF bit 3 / LCD segment |
| Pin 55 | RF4 — PORTF bit 4 / LCD segment |
| Pin 56 | RF5 — PORTF bit 5 / LCD segment |
| Pin 57 | RF6 — PORTF bit 6 / LCD segment |
| Pin 58 | RF7 — PORTF bit 7 / LCD segment |
| Pin 59 | RG0 — PORTG bit 0 / LCD common |
| Pin 60 | RG1 — PORTG bit 1 / LCD common |
| Pin 61 | RG2 — PORTG bit 2 / LCD common |
| Pin 62 | RG3 — PORTG bit 3 / LCD common |
| Pin 63 | RG4 — PORTG bit 4 / LCD common |
| Pin 64 | RG5 — PORTG bit 5 |
| Pin 65 | NC — Not connected (per datasheet) |
| Pin 66 | NC — Not connected (per datasheet) |
| Pin 67 | NC — Not connected (per datasheet) |
| Pin 68 | VDD — Positive power supply |
Typical Applications
PIC16C924T-08/L is suitable for 6 applications: Industrial Control Panel with LCD, Appliance User Interface, Portable Instrumentation Front Panel, Point-of-Sale Terminal, Battery-Powered Metering Device, Automotive Dashboard Sub-Display (Legacy).
Industrial Control Panel with LCD
The PIC16C924T-08/L is engineered for industrial control panels that must display process variables on character LCDs without an external display controller. Its integrated segment LCD driver supports static through 1/4 multiplex modes and includes an internal bias resistor ladder, so the MCU drives the glass directly from PORT pins. The 8-bit ADC with 5 channels reads sensor inputs (temperature, pressure, flow) at the 8 MHz core rate, while I2C and SPI talk to external EEPROMs or digital potentiometers. The 7 KB OTP memory holds fixed control firmware and HMI state machines. Designers using PIC16C924T-08/L on a 24V industrial bus typically pair it with a TVS-protected regulator and an isolated I2C transceiver; the OTP memory means field firmware updates require physical replacement.
Recommended
Appliance User Interface
Consumer appliances such as washing machines, dishwashers, microwave ovens, and induction cooktops rely on the PIC16C924T-08/L to drive a segment LCD showing program state, timer, and temperature. The integrated LCD driver eliminates the external HT1621 or similar display controller, cutting BOM cost and PCB area. The 8 MHz PIC core runs the cycle state machine and button-debounce logic, while the 8-bit ADC monitors temperature and humidity sensors. OTP memory is ideal here because the appliance firmware is locked at production time and never updated in the field. Drop-in alternatives such as PIC16C924-08/L share the same PLCC-68 footprint and silicon, allowing manufacturers to source either variant based on inventory.
Recommended
Portable Instrumentation Front Panel
Handheld test and measurement instruments use the PIC16C924T-08/L to drive a custom segment LCD that shows measurement value, units, and battery status. The low-power CMOS core plus integrated LCD driver allow the display to remain updated in sleep mode while the CPU is halted, extending battery life on 2xAA or coin-cell designs. The 5-channel 8-bit ADC digitizes sensor inputs at the 500 ns instruction cycle, fast enough for thermocouple cold-junction compensation and ratiometric bridge measurements. The 68-PLCC package is socket-compatible, simplifying factory calibration and field service. Designers should plan for OTP memory constraints: prototype on a JW (windowed) package or use the flash-based PIC16F914-I/PT family for development.
Recommended
Point-of-Sale Terminal
Compact point-of-sale (POS) terminals and price-lookup devices use the PIC16C924T-08/L to drive a character LCD showing price, item description, and total. The integrated LCD controller and 35-instruction RISC core handle barcode decoder input, transaction logging to external I2C EEPROM, and keypad scanning. The 7 KB OTP memory holds the product database and pricing tables for a single store or chain. I2C and SPI interfaces let the terminal talk to a mag-stripe reader or printer. Because PIC16C924T-08/L is now obsolete, long-life POS deployments should evaluate the PIC16F914-I/PT or migrate to a modern PIC18 or dsPIC for new designs.
Recommended
Battery-Powered Metering Device
Battery-powered metering devices including gas, water, and electric meters benefit from the PIC16C924T-08/L integrated LCD driver and low-power CMOS design. The LCD driver can refresh the display in sleep mode while the CPU is halted, drawing microamps from a single lithium cell or 2xAA battery. The 8-bit ADC with 5 channels reads pulse-output flow sensors or shunt current, while I2C links to an external RTC for time-of-use billing. OTP memory locks the calibration coefficients and prevents field tampering. For new metering designs, the flash-based PIC16F914 family offers more RAM, more ADC channels, and the same LCD peripheral at the cost of a different package pinout.
Recommended
Automotive Dashboard Sub-Display (Legacy)
Although PIC16C924T-08/L is commercial temperature grade, automotive dashboard sub-displays for aftermarket gauges and accessory controllers have used this part for showing trip data, oil life, and tire pressure on small segment LCDs. Designers should select the PIC16C924T-08I/L industrial temperature variant (-40C to +85C) instead, or migrate to AEC-Q100-qualified PIC16F914 or dsPIC33 family members. The integrated LCD driver simplifies the BOM and the 5-channel ADC reads the analog sensors directly. OTP memory is well suited to aftermarket gauges that are configured once and never updated.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C924T-08/L — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16C924T-08I/L | PIC16C924-08/L | PIC16C924-04I/L | PIC16C924T-08/PT | PIC16C923T-08I/L |
|---|---|---|---|---|---|---|
| Package | 68-PLCC | 68-PLCC - same | 68-PLCC - same | 68-PLCC - same | 64-TQFP - different | 68-PLCC - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Maximum Clock Speed | 8 MHz | 8 MHz | 8 MHz | 4 MHz | 8 MHz | 8 MHz |
| Program Memory | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP | 4 KB OTP |
| Data RAM | 176 bytes | 176 bytes | 176 bytes | 176 bytes | 176 bytes | 176 bytes |
| Temperature Grade | Commercial (0C to +70C) | Industrial (-40C to +85C) | Commercial (0C to +70C) | Industrial (-40C to +85C) | Commercial (0C to +70C) | Industrial (-40C to +85C) |
| ADC | 8-bit, 5 channels | 8-bit, 5 channels | 8-bit, 5 channels | 8-bit, 5 channels | 8-bit, 5 channels | 8-bit, 5 channels |
| LCD Driver | Integrated segment LCD | Integrated segment LCD | Integrated segment LCD | Integrated segment LCD | Integrated segment LCD | Integrated segment LCD (reduced segments) |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
Key Differentiators
- Industrial temperature drop-in option (vs PIC16C924T-08I/L)
- Same silicon across packaging variants (vs PIC16C924-08/L)
- Integrated LCD driver eliminates external controller (vs PIC16C924-04I/L)
Design Notes
Use a PLCC-68 socket (e.g., 3M Textool or equivalent) for prototype builds so OTP devices can be replaced easily after firmware revisions. Decouple VDD with a 100 nF ceramic capacitor placed within 5 mm of the VDD pins (pin 1 and pin 68), and add a bulk 10 uF tantalum or ceramic capacitor near the package. The VLCD pins (43-45) require local 100 nF decoupling to keep the LCD charge-pump output stable and prevent display artifacts.
OTP memory cannot be erased or rewritten - every firmware revision that goes wrong costs a new PIC16C924T-08/L. Always prototype and validate firmware on a JW (windowed EPROM) package or the flash-based PIC16F914 family before committing to OTP volume units. Verify the oscillator configuration bits match your crystal choice (HS vs XT vs LP) - selecting HS for a 32.768 kHz crystal will fail to start. The PIC16C924 has no on-chip debug, so plan to use an ICD or ICE for development.
The 5-channel 8-bit ADC requires adequate acquisition time - at 8 MHz (TAD = 2 us minimum) use 16 TAD conversion cycles for full accuracy. Add a small RC low-pass filter (1 kohm + 100 pF) on analog inputs to reject digital switching noise from adjacent PORT pins. The LCD segment pins toggle at the LCD frame frequency (typically 50-200 Hz), so keep analog traces away from LCD lines or guard them with ground to prevent display noise coupling into ADC readings.
Compliance Information
Lifecycle is obsolete per Microchip. RoHS, REACH, lead-free, halogen-free, and conflict-mineral status not explicitly stated in the verified web data - marked unknown and requires confirmation from Microchip's PCN records. Not AEC-Q100 qualified; PIC16C924T-08I/L is the industrial-temperature drop-in for harsh environments but still not automotive-qualified.
