PIC16C924T-08I/PT - 8-Bit OTP MCU, 7KB, 8MHz, 64-TQFP | Microchip
MPN: PIC16C924T-08I/PT ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $11.2 | $11.20 |
| 10 | $10.45 | $104.50 |
| 100 | $9.15 | $915.00 |
| 500 | $8.3 | $4,150.00 |
| 1,000 | $7.55 | $7,550.00 |
PIC16C924T-08I/PT Overview
A microcontroller (MCU) is a programmable integrated circuit that combines a CPU, memory (program + data), and peripherals on a single die. Within the semiconductor taxonomy, the PIC16C924 sits in the 8-bit MCU branch of the microcontroller family, which is a sub-category of microcontrollers under embedded processors. PIC microcontrollers use a RISC-based Harvard architecture that executes one instruction per cycle (except branches), delivering predictable timing suitable for real-time control. The 'C' suffix indicates one-time-programmable (OTP) EPROM program memory, distinguishing it from flash-based 'F' variants, and the OTP approach is commonly chosen for low-cost production runs of stable firmware.
Key features include 192 bytes of RAM data memory, an integrated LCD driver controller with on-chip bias generation, an 8-channel 8-bit Analog-to-Digital Converter (ADC), three timers, a synchronous serial port (SSP) supporting SPI and I²C, and an industrial operating temperature range of −40°C to +85°C. The supply voltage range of 4.0V to 6.0V is matched to typical 5V system rails, and the OTP memory cell supports one-time field or factory programming.
The PIC16C924T-08I/PT employs a RISC core with a 14-bit instruction word and a 35-instruction set, providing deterministic interrupt response and code density. Power management is handled through SLEEP mode with wake-up on I/O change or watchdog overflow. The integrated LCD driver supports up to 32 segments × 4 commons without external bias resistors, and the 8-bit ADC delivers conversion rates suitable for temperature, voltage, and sensor monitoring tasks.
Typical applications include industrial control panels with LCD displays, medical monitoring devices requiring on-screen readouts, consumer appliance user interfaces, instrumentation with front-panel displays, point-of-sale (POS) terminals, and embedded operator-interface panels. The combination of integrated LCD, ADC, and 25 GPIO lines reduces BOM cost in display-centric embedded designs.
When designing with this device, allocate sufficient PCB area for the 64-pin TQFP footprint and provide in-circuit emulation via the ICD header. The OTP memory cannot be erased, so firmware revisions require a new blank part; designers targeting development cycles should use the pin-compatible PIC16F914 or PIC16F946 flash variants. Note that the -08 speed grade denotes an 8 MHz oscillator; for higher throughput select the -04 (4 MHz) variant with corresponding in-circuit emulators.
This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical design guidance not found in the bare manufacturer datasheet.
Drop-in alternatives for PIC16C924T-08I/PT — 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-08I/PT (same form factor and footprint) — differing in ADC, Core Architecture, LCD Driver, Package, Maximum CPU Frequency.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F914-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F946-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16C924-08/PT
✅ Drop-In✓ In Stock
$5.21 / Unit
View Datasheet →PIC16C924-04I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16C923-08I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16C924T-04I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16C924T-08I/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC RISC (Harvard) |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 7 KB (4K × 14 words) |
| RAM Data Memory | 192 bytes |
| Maximum CPU Frequency | 8 MHz |
| Operating Voltage (Vdd) | 4.0 V to 6.0 V |
| Programmable I/O Pins | 25 |
| ADC | 8 channels × 8-bit |
| LCD Driver | On-chip, up to 32 segments × 4 commons |
| Timers | 3 |
| Serial Interface | SSP (SPI / I²C) |
| Operating Temperature Range | −40 °C to +85 °C (Industrial) |
| Package | 64-TQFP (10 × 10 mm) |
| Mounting Type | Surface Mount |
| Instruction Set | 35 instructions, 14-bit word |
| RoHS Status | Compliant |
| Speed Grade | -08 (8 MHz oscillator) |
PIC16C924T-08I/PT Pin Configuration
| Pin 1 | SEG0 — LCD segment output 0 |
| Pin 2 | SEG1 — LCD segment output 1 |
| Pin 3 | SEG2 — LCD segment output 2 |
| Pin 4 | SEG3 — LCD segment output 3 |
| Pin 5 | SEG4 — LCD segment output 4 |
| Pin 6 | SEG5 — LCD segment output 5 |
| Pin 7 | SEG6 — LCD segment output 6 |
| Pin 8 | SEG7 — LCD segment output 7 |
| Pin 9 | SEG8 — LCD segment output 8 |
| Pin 10 | SEG9 — LCD segment output 9 |
| Pin 11 | SEG10 — LCD segment output 10 |
| Pin 12 | SEG11 — LCD segment output 11 |
| Pin 13 | SEG12 — LCD segment output 12 |
| Pin 14 | SEG13 — LCD segment output 13 |
| Pin 15 | SEG14 — LCD segment output 14 |
| Pin 16 | SEG15 — LCD segment output 15 |
| Pin 17 | SEG16 — LCD segment output 16 |
| Pin 18 | SEG17 — LCD segment output 17 |
| Pin 19 | SEG18 — LCD segment output 18 |
| Pin 20 | SEG19 — LCD segment output 19 |
| Pin 21 | SEG20 — LCD segment output 20 |
| Pin 22 | SEG21 — LCD segment output 21 |
| Pin 23 | SEG22 — LCD segment output 22 |
| Pin 24 | SEG23 — LCD segment output 23 |
| Pin 25 | SEG24 — LCD segment output 24 |
| Pin 26 | SEG25 — LCD segment output 25 |
| Pin 27 | SEG26 — LCD segment output 26 |
| Pin 28 | SEG27 — LCD segment output 27 |
| Pin 29 | SEG28 — LCD segment output 28 |
| Pin 30 | SEG29 — LCD segment output 29 |
| Pin 31 | SEG30 — LCD segment output 30 |
| Pin 32 | SEG31 — LCD segment output 31 |
| Pin 33 | COM3 — LCD common output 3 |
| Pin 34 | COM2 — LCD common output 2 |
| Pin 35 | COM1 — LCD common output 1 |
| Pin 36 | COM0 — LCD common output 0 |
| Pin 37 | VLCD1 — LCD bias voltage input 1 |
| Pin 38 | VLCD2 — LCD bias voltage input 2 |
| Pin 39 | VLCD3 — LCD bias voltage input 3 |
| Pin 40 | RA0/AN0 — GPIO port A bit 0 / ADC channel 0 |
| Pin 41 | RA1/AN1 — GPIO port A bit 1 / ADC channel 1 |
| Pin 42 | RA2/AN2 — GPIO port A bit 2 / ADC channel 2 |
| Pin 43 | RA3/AN3 — GPIO port A bit 3 / ADC channel 3 |
| Pin 44 | RA4/T0CKI — GPIO port A bit 4 / Timer0 clock input |
| Pin 45 | RA5/AN4 — GPIO port A bit 5 / ADC channel 4 |
| Pin 46 | RA6 — GPIO port A bit 6 |
| Pin 47 | RA7 — GPIO port A bit 7 |
| Pin 48 | OSC1/CLKIN — Crystal oscillator input / external clock |
| Pin 49 | OSC2/CLKOUT — Crystal oscillator output / clock output |
| Pin 50 | RC0 — GPIO port C bit 0 |
| Pin 51 | RC1 — GPIO port C bit 1 |
| Pin 52 | RC2 — GPIO port C bit 2 |
| Pin 53 | RC3 — GPIO port C bit 3 |
| Pin 54 | RC4 — GPIO port C bit 4 |
| Pin 55 | RC5 — GPIO port C bit 5 |
| Pin 56 | RC6 — GPIO port C bit 6 |
| Pin 57 | RC7 — GPIO port C bit 7 |
| Pin 58 | RD0 — GPIO port D bit 0 |
| Pin 59 | RD1 — GPIO port D bit 1 |
| Pin 60 | RD2 — GPIO port D bit 2 |
| Pin 61 | RD3 — GPIO port D bit 3 |
| Pin 62 | RB0/INT — GPIO port B bit 0 / external interrupt |
| Pin 63 | VSS — Ground |
| Pin 64 | VDD — Positive supply voltage |
Typical Applications
PIC16C924T-08I/PT is suitable for 6 applications: Industrial Control Panels with LCD Display, Medical Monitoring Devices, Consumer Appliance User Interfaces, Test and Measurement Instrumentation, Point-of-Sale (POS) Terminals and Kiosks, HVAC Control and Building Automation.
Industrial Control Panels with LCD Display
The PIC16C924T-08I/PT is purpose-built for industrial control panels with integrated LCD readouts. Its on-chip LCD driver supports up to 32 segments × 4 commons without external bias resistors, driving character or graphic displays directly. The 8-channel 8-bit ADC handles temperature, pressure, and analog sensor inputs from front-panel transducers with adequate resolution for setpoint monitoring. With 25 programmable I/O pins the MCU drives panel switches, LEDs, and relay coils from a single chip. Industrial temperature range of −40°C to +85°C ensures operation in factory-floor cabinets. The 64-TQFP package provides compact PCB mounting while remaining hand-solderable for prototype builds. For new panel designs, the flash-based PIC16F914-I/PT drop-in replacement enables in-circuit firmware updates without depanel rework.
Recommended
Medical Monitoring Devices
The PIC16C924T-08I/PT suits medical monitoring devices such as blood-pressure cuffs, glucose meters, and pulse oximeters that require an on-device LCD readout and analog sensor conditioning. The integrated 8-bit ADC digitizes signals from pressure transducers, thermistors, or photodiode amplifiers with sufficient resolution for clinical-grade measurements. OTP EPROM program memory protects proprietary calibration algorithms from electronic extraction, an important consideration for FDA submission IP protection. Low power SLEEP mode with wake-up on timer or I/O change extends battery life in portable designs. The 5V operating rail simplifies analog front-end design. According to Microchip application notes, the PIC16C924 LCD duty modes support direct drive of standard 4-mux TN/STN displays commonly used in medical housings.
Recommended
Consumer Appliance User Interfaces
The PIC16C924T-08I/PT integrates display, ADC, and GPIO into a single 64-TQFP package, reducing BOM cost in consumer appliances such as washing machines, microwave ovens, and HVAC thermostats. The LCD driver directly controls 7-segment or 14-segment character displays that show time, temperature, and cycle status. Three on-chip timers handle real-time clock generation, motor PWM, and keypad debounce, eliminating external timer ICs. The SSP (SPI/I²C) interface connects to EEPROM for storing user presets or to digital temperature sensors for closed-loop control. OTP memory locks down firmware at production, preventing end-user modification. The industrial temperature range covers appliance under-cabinet and garage-installation environments. For mass-production appliances, Microchip recommends the flash-based PIC16C924 equivalent for reduced mask-charge economics.
Recommended
Test and Measurement Instrumentation
The PIC16C924T-08I/PT serves as the front-panel controller in handheld multimeters, insulation testers, and portable calibrators. The 8-bit ADC digitizes measurement ranges selected by rotary switches, while the LCD driver displays measured values, units, and bar-graph battery indicators simultaneously. The 25 GPIO lines drive range-relay matrices, function buttons, and rotary-encoder inputs. Industrial temperature grading suits field-deployed instruments used in outdoor cabinets. The 5V supply rail simplifies integration with op-amp front ends used for signal conditioning. OTP program memory prevents firmware tampering that could compromise measurement integrity. For instruments requiring data logging, the SSP port interfaces to external serial EEPROMs, capturing measurements for later USB upload via a bridge IC.
Recommended
Point-of-Sale (POS) Terminals and Kiosks
The PIC16C924T-08I/PT supports compact POS terminals and self-service kiosks requiring an integrated LCD for transaction displays and an ADC for battery monitoring. The 25 GPIO lines interface to keypad matrices, magnetic-stripe readers, and thermal printer control lines, consolidating peripheral management on a single MCU. The integrated LCD driver eliminates external display controllers, reducing board area and BOM cost in space-constrained kiosk housings. OTP memory locks down payment-handling firmware to support PCI compliance audits by preventing post-deployment code modification. Industrial temperature rating ensures reliable operation in unheated retail back rooms or outdoor vending enclosures. The 5V supply simplifies power tree design when paired with 12V or 24V kiosk backplanes.
Recommended
HVAC Control and Building Automation
The PIC16C924T-08I/PT addresses HVAC thermostat and building-automation controller applications that demand LCD readouts, analog sensor inputs, and relay outputs in a single chip. The 8-bit ADC reads thermistor, humidity sensor, and air-pressure transducer outputs directly, supporting multi-zone climate control. The on-chip LCD driver displays setpoint, room temperature, and system status across 32-segment displays. Three timers handle PWM output for damper motors and time-proportioning control of heating elements. The 25 GPIO lines drive relay coils for compressor contactors, fan speeds, and valve actuators. The industrial temperature range tolerates equipment-room environments. The OTP memory protects calibration constants and locked configuration from field modification, while the 64-TQFP package fits standard thermostat backplate footprints.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C924T-08I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F914-I/PT | PIC16F946-I/PT | PIC16C924-08/PT | PIC16C924-04I/PT | PIC16C923-08I/PT |
|---|---|---|---|---|---|---|
| Package | 64-TQFP (10×10 mm) | 64-TQFP (10×10 mm) - same | 64-TQFP (10×10 mm) - same | 64-TQFP (10×10 mm) - same | 64-TQFP (10×10 mm) - same | 64-TQFP (10×10 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 7 KB OTP | 7 KB Flash | 14 KB Flash | 7 KB OTP | 7 KB OTP | 7 KB OTP |
| RAM | 192 B | 256 B | 336 B | 192 B | 192 B | 192 B |
| CPU Frequency | 8 MHz | 20 MHz | 20 MHz | 8 MHz | 4 MHz | 8 MHz |
| ADC | 8ch × 8-bit | 8ch × 8-bit | 8ch × 10-bit | 8ch × 8-bit | 8ch × 8-bit | None |
| Operating Voltage | 4.0 V - 6.0 V | 2.0 V - 5.5 V | 2.0 V - 5.5 V | 4.0 V - 6.0 V | 4.0 V - 6.0 V | 4.0 V - 6.0 V |
| Programmable I/O | 25 | 25 | 25 | 25 | 25 | 25 |
| Lifecycle Status | NRND | Active | Active | NRND | NRND | NRND |
Key Differentiators
- Integrated LCD driver eliminates external segment controllers (vs PIC16C924-04I/PT)
- Flash reprogrammability with same pinout (vs PIC16C924-04I/PT)
- Higher ADC resolution for precision instrumentation (vs PIC16C924-04I/PT)
Design Notes
The PIC16C924T-08I/PT operates from a single 4.0V-6.0V supply on VDD (pin 64) with VSS (pin 63) as ground. Place a 100 nF decoupling capacitor within 5 mm of VDD and a 10 µF bulk capacitor on the same rail to suppress switching transients from the on-chip LCD charge pump. For battery-backed designs, route the VLCD1-3 pins through a low-leakage resistor divider; the LCD bias generator draws up to 500 µA when driving a 4-mux display, which dominates quiescent current in SLEEP mode.
OTP program memory cannot be erased or rewritten. Plan firmware revisions accordingly: each engineering change requires a new blank part. For development cycles, prototype with the flash-based PIC16F914-I/PT (pin-compatible in the 64-TQFP) and migrate to PIC16C924 only when firmware is locked. Never attempt in-circuit programming on a windowed JW package version unless the part is in a ceramic windowed carrier designed for UV erasure.
The 64-TQFP package has a 0.5 mm pitch with a thermal pad that should be soldered to a PCB land for mechanical robustness. Although the thermal pad is internally floating, soldering it to a copper pour reduces lead-frame stress during thermal cycling. Route the OSC1/OSC2 traces symmetrically with grounded guard traces; keep crystal traces under 5 mm to avoid oscillator start-up failures. The VLCD1-3 bias pins should connect to a star-grounded capacitor network (typically 100 nF each) to prevent LCD contrast drift.
Compliance Information
RoHS and REACH compliant per Microchip product declarations. Industrial temperature grade only; not AEC-Q100 qualified for automotive safety applications. Lead-free and halogen-free per Microchip material declarations.
