PIC16C924T-08/L - 8MHz 8-bit LCD MCU 7KB OTP 68-PLCC | Microchip
Référence : PIC16C924T-08/L ✗ Fin de vie| Qté | Prix unitaire | Total |
|---|---|---|
| 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 Présentation
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.
Alternatives de remplacement direct pour PIC16C924T-08/L — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec PIC16C924T-08/L (même facteur de forme et même empreinte) — différant par LCD Driver, Package, ADC, Instruction Cycle, Mounting Type.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
PIC16C924T-08I/L
✅ Remplacement direct✓ En stock
$6.88 / unité
Voir la fiche technique →PIC16C924-08/L
✅ Remplacement direct✓ En stock
$10.45 / unité
Voir la fiche technique →PIC16C924-04I/L
✅ Remplacement direct✓ En stock
$2.85 / unité
Voir la fiche technique →PIC16C923T-08I/L
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$5.4 / unité
Voir la fiche technique →PIC16C924T-08/L Valeurs maximales et caractéristiques électriques
| 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 |
| Boîtier | 68-pin PLCC (24.23 x 24.23 mm) |
| Terminal Form | J-Bend |
| Temperature Grade | Commercial |
| Type de montage | Surface Mount (PLCC socket compatible) |
Configuration des broches de PIC16C924T-08/L
| Broche 1 | VDD — Positive power supply |
| Broche 2 | OSC1 — External oscillator input / crystal connection |
| Broche 3 | OSC2 — External oscillator output / crystal connection |
| Broche 4 | MCLR — Master clear reset input (active low) |
| Broche 5 | RA0 — PORTA bit 0 / analog input AN0 |
| Broche 6 | RA1 — PORTA bit 1 / analog input AN1 |
| Broche 7 | RA2 — PORTA bit 2 / analog input AN2 |
| Broche 8 | RA3 — PORTA bit 3 / analog input AN3 |
| Broche 9 | RA4 — PORTA bit 4 / analog input AN4 / Timer0 clock |
| Broche 10 | RA5 — PORTA bit 5 |
| Broche 11 | VSS — Ground reference |
| Broche 12 | RB0 — PORTB bit 0 / external interrupt |
| Broche 13 | RB1 — PORTB bit 1 |
| Broche 14 | RB2 — PORTB bit 2 |
| Broche 15 | RB3 — PORTB bit 3 |
| Broche 16 | RB4 — PORTB bit 4 |
| Broche 17 | RB5 — PORTB bit 5 |
| Broche 18 | RB6 — PORTB bit 6 / in-circuit debug |
| Broche 19 | RB7 — PORTB bit 7 / in-circuit debug |
| Broche 20 | VSS — Ground reference |
| Broche 21 | RC0 — PORTC bit 0 / LCD segment |
| Broche 22 | RC1 — PORTC bit 1 / LCD segment |
| Broche 23 | RC2 — PORTC bit 2 / LCD segment |
| Broche 24 | RC3 — PORTC bit 3 / LCD segment |
| Broche 25 | RC4 — PORTC bit 4 / LCD segment |
| Broche 26 | RC5 — PORTC bit 5 / LCD segment |
| Broche 27 | RC6 — PORTC bit 6 / LCD segment |
| Broche 28 | RC7 — PORTC bit 7 / LCD segment |
| Broche 29 | RD0 — PORTD bit 0 / LCD segment |
| Broche 30 | RD1 — PORTD bit 1 / LCD segment |
| Broche 31 | RD2 — PORTD bit 2 / LCD segment |
| Broche 32 | RD3 — PORTD bit 3 / LCD segment |
| Broche 33 | RD4 — PORTD bit 4 / LCD segment |
| Broche 34 | RD5 — PORTD bit 5 / LCD segment |
| Broche 35 | RD6 — PORTD bit 6 / LCD segment |
| Broche 36 | RD7 — PORTD bit 7 / LCD segment |
| Broche 37 | RE0 — PORTE bit 0 / LCD common |
| Broche 38 | RE1 — PORTE bit 1 / LCD common |
| Broche 39 | RE2 — PORTE bit 2 / LCD common |
| Broche 40 | VSS — Ground reference |
| Broche 41 | LCDBIAS0 — LCD bias generation pin 0 |
| Broche 42 | LCDBIAS1 — LCD bias generation pin 1 |
| Broche 43 | VLCD1 — LCD supply voltage 1 |
| Broche 44 | VLCD2 — LCD supply voltage 2 |
| Broche 45 | VLCD3 — LCD supply voltage 3 |
| Broche 46 | SCL — I2C clock line |
| Broche 47 | SDA — I2C data line |
| Broche 48 | SCK — SPI clock line |
| Broche 49 | SDI — SPI data input |
| Broche 50 | SDO — SPI data output |
| Broche 51 | RF0 — PORTF bit 0 / LCD segment |
| Broche 52 | RF1 — PORTF bit 1 / LCD segment |
| Broche 53 | RF2 — PORTF bit 2 / LCD segment |
| Broche 54 | RF3 — PORTF bit 3 / LCD segment |
| Broche 55 | RF4 — PORTF bit 4 / LCD segment |
| Broche 56 | RF5 — PORTF bit 5 / LCD segment |
| Broche 57 | RF6 — PORTF bit 6 / LCD segment |
| Broche 58 | RF7 — PORTF bit 7 / LCD segment |
| Broche 59 | RG0 — PORTG bit 0 / LCD common |
| Broche 60 | RG1 — PORTG bit 1 / LCD common |
| Broche 61 | RG2 — PORTG bit 2 / LCD common |
| Broche 62 | RG3 — PORTG bit 3 / LCD common |
| Broche 63 | RG4 — PORTG bit 4 / LCD common |
| Broche 64 | RG5 — PORTG bit 5 |
| Broche 65 | NC — Not connected (per datasheet) |
| Broche 66 | NC — Not connected (per datasheet) |
| Broche 67 | NC — Not connected (per datasheet) |
| Broche 68 | VDD — Positive power supply |
Applications typiques
PIC16C924T-08/L convient pour 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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PIC16C924T-08/L — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | 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 |
Principaux différenciateurs
- 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)
Notes de conception
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.
Informations de conformité
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.
