PIC16LC924-04I/PT - 8-Bit 4MHz LCD MCU 7KB OTP TQFP-64 | Microchip
MPN: PIC16LC924-04I/PT ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.12 | $4.12 |
| 10 | $3.78 | $37.80 |
| 100 | $3.21 | $321.00 |
| 500 | $2.74 | $1,370.00 |
| 1,000 | $2.35 | $2,350.00 |
PIC16LC924-04I/PT Overview
An 8-bit microcontroller (MCU) is a small, single-chip computer built around an 8-bit data path and a Harvard-style RISC core. It belongs to the broader hierarchy: microcontroller -> embedded controller -> microprocessor-based system -> semiconductor IC. Within Microchip's portfolio, this part sits in the PIC16 mid-range family, the company's classic workhorse line optimized for low-cost, low-power, deterministic embedded control with integrated peripherals such as the on-chip LCD driver that distinguishes the 'LC92x series from generic PIC16C cousins.
Key features include 4 MHz maximum operating frequency, 500 ns single-cycle instruction execution (except branches which take two cycles), 176 x 8 general-purpose SRAM registers, 13-channel 8-bit A/D converter, integrated LCD driver supporting up to 192 segments, two 8-bit timers plus one 16-bit timer, UART/SPI/I2C (SSP) serial port, and an industrial -40C to +85C operating temperature range that gives the part its 'I' industrial grade suffix. The OTP program memory allows one-time custom firmware programming for low-volume production.
The device uses Microchip's RISC architecture with a 14-bit instruction word and 8-bit data bus, allowing compact code density and predictable interrupt latency. Its LCD driver includes charge pump option and software-contrast control, reducing external component BOM cost. Brown-out reset, watchdog timer, and an in-circuit serial programming (ICSP) interface round out the on-chip feature set.
Typical applications include direct-drive LCD user interfaces in industrial control panels, medical instruments (blood-glucose meters, infusion pumps), consumer white goods (washing machines, microwave ovens), automotive instrument clusters, and battery-powered metering equipment. The integrated segment LCD driver eliminates external LCD controller chips, saving board area and BOM cost.
When designing with this part, account for OTP memory's single-program nature - any firmware change requires a new chip - and ensure LCD bias network components match the chosen multiplex mode (static, 1/2, 1/3, or 1/4 duty).
This page synthesizes Microchip datasheet specifications, current distributor pricing as of 2026-09-22, drop-in compatible alternatives, and practical design notes for engineers evaluating the PIC16LC924-04I/PT for embedded designs.
Drop-in alternatives for PIC16LC924-04I/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 PIC16LC924-04I/PT (same form factor and footprint) — differing in Package, Program Memory Size, RAM Size, A/D Converter, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LC924-04/PT
✅ Drop-In✓ In Stock
$5.42 / Unit
View Datasheet →PIC16LC924T-04I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LC924-04I/L
✅ Drop-In✓ In Stock
$3.55 / Unit
View Datasheet →PIC16LC924T-04I/L
✅ Drop-In✓ In Stock
$10.95 / Unit
View Datasheet →PIC16LC924T-04/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LC924-04I/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC16C / PIC mid-range RISC, 8-bit data bus, 14-bit instruction word |
| Program Memory Type | OTP (One-Time-Programmable) EPROM |
| Program Memory Size | 7 KB (4K x 14 words) |
| RAM Size | 176 bytes |
| Maximum Clock Frequency | 4 MHz |
| Instruction Cycle Time | 500 ns (single-cycle except branches which are 2-cycle) |
| Number of I/O Pins | 52 |
| Package | 64-pin TQFP (10x10 mm), PT suffix |
| Operating Voltage | 3.3 V / 5 V dual range |
| Operating Temperature | -40 C to +85 C (Industrial, 'I' suffix) |
| A/D Converter | 8-bit, up to 13 channels |
| LCD Driver | Integrated, up to 192 segments, software-contrast control |
| Timers | Two 8-bit + one 16-bit (TMR0/TMR1/TMR2) |
| Serial Interfaces | UART (SCI), SPI, I2C (via SSP module) |
| Number of Instructions | 35 single-word instructions |
| Mounting Type | Surface Mount |
| MSL Level | 3 (per JEDEC J-STD-020, reflow 260 C peak) |
PIC16LC924-04I/PT Pin Configuration
| Pin 1 | RA0/AN0 — Port A bit 0 / Analog input channel 0 |
| Pin 2 | RA1/AN1 — Port A bit 1 / Analog input channel 1 |
| Pin 3 | RA2/AN2/VREF- — Port A bit 2 / Analog input / A/D negative reference |
| Pin 4 | RA3/AN3/VREF+ — Port A bit 3 / Analog input / A/D positive reference |
| Pin 5 | RA4/T0CKI — Port A bit 4 / Timer0 clock input |
| Pin 6 | RA5/AN4/SS — Port A bit 5 / Analog input / SPI slave select |
| Pin 7 | AVSS — Analog ground |
| Pin 8 | AVDD — Analog positive supply |
| Pin 9 | OSC1/CLKIN — Crystal oscillator input / external clock |
| Pin 10 | OSC2/CLKOUT — Crystal oscillator output / clock out |
| Pin 11 | MCLR/VPP — Master clear reset / programming voltage |
| Pin 12 | SEG0 — LCD segment output 0 |
| Pin 13 | SEG1 — LCD segment output 1 |
| Pin 14 | SEG2 — LCD segment output 2 |
| Pin 15 | SEG3 — LCD segment output 3 |
| Pin 16 | SEG4 — LCD segment output 4 |
| Pin 17 | SEG5 — LCD segment output 5 |
| Pin 18 | SEG6 — LCD segment output 6 |
| Pin 19 | SEG7 — LCD segment output 7 |
| Pin 20 | SEG8 — LCD segment output 8 |
| Pin 21 | SEG9 — LCD segment output 9 |
| Pin 22 | SEG10 — LCD segment output 10 |
| Pin 23 | SEG11 — LCD segment output 11 |
| Pin 24 | SEG12 — LCD segment output 12 |
| Pin 25 | SEG13 — LCD segment output 13 |
| Pin 26 | SEG14 — LCD segment output 14 |
| Pin 27 | SEG15 — LCD segment output 15 |
| Pin 28 | SEG16 — LCD segment output 16 |
| Pin 29 | SEG17 — LCD segment output 17 |
| Pin 30 | SEG18 — LCD segment output 18 |
| Pin 31 | SEG19 — LCD segment output 19 |
| Pin 32 | SEG20 — LCD segment output 20 |
| Pin 33 | SEG21 — LCD segment output 21 |
| Pin 34 | SEG22 — LCD segment output 22 |
| Pin 35 | SEG23 — LCD segment output 23 |
| Pin 36 | SEG24 — LCD segment output 24 |
| Pin 37 | SEG25 — LCD segment output 25 |
| Pin 38 | SEG26 — LCD segment output 26 |
| Pin 39 | SEG27 — LCD segment output 27 |
| Pin 40 | SEG28 — LCD segment output 28 |
| Pin 41 | SEG29 — LCD segment output 29 |
| Pin 42 | SEG30 — LCD segment output 30 |
| Pin 43 | SEG31 — LCD segment output 31 |
| Pin 44 | COM0 — LCD common output 0 (backplane) |
| Pin 45 | COM1 — LCD common output 1 (backplane) |
| Pin 46 | COM2 — LCD common output 2 (backplane) |
| Pin 47 | COM3 — LCD common output 3 (backplane) |
| Pin 48 | RB0/INT — Port B bit 0 / external interrupt |
| Pin 49 | RB1 — Port B bit 1 |
| Pin 50 | RB2 — Port B bit 2 |
| Pin 51 | RB3 — Port B bit 3 |
| Pin 52 | RB4 — Port B bit 4 |
| Pin 53 | RB5 — Port B bit 5 |
| Pin 54 | RB6/PGC — Port B bit 6 / ICSP clock |
| Pin 55 | RB7/PGD — Port B bit 7 / ICSP data |
| Pin 56 | RC0 — Port C bit 0 |
| Pin 57 | RC1 — Port C bit 1 |
| Pin 58 | RC2 — Port C bit 2 |
| Pin 59 | RC3 — Port C bit 3 |
| Pin 60 | RC4 — Port C bit 4 |
| Pin 61 | RC5 — Port C bit 5 |
| Pin 62 | RC6/TX/CK — Port C bit 6 / UART TX / I2C clock |
| Pin 63 | RC7/RX/DT — Port C bit 7 / UART RX / I2C data |
| Pin 64 | VDD — Digital positive supply |
Typical Applications
PIC16LC924-04I/PT is suitable for 6 applications: Industrial Control Panel with Segment LCD, Medical Metering and Diagnostic Devices, Consumer White Goods - Washing Machines, Microwaves, Automotive Instrument Cluster Auxiliary Display, Battery-Powered Metering and Data Loggers, Home Appliance User Interface Modules.
Industrial Control Panel with Segment LCD
The PIC16LC924-04I/PT fits industrial control panels because it combines an 8-bit RISC core running at 4 MHz with an integrated segment LCD driver supporting up to 192 segments, eliminating the need for a separate LCD controller IC. With 52 I/O pins and 13-channel 8-bit A/D, it can read multiple analog sensors (temperature, pressure, level) while directly driving a 4-mux LCD for HMI feedback. The -40 C to +85 C industrial temperature grade and 5 V tolerance match the harsh 24 V-rail-derived power environments typical of factory panels.
Recommended
Medical Metering and Diagnostic Devices
Blood-glucose meters, infusion pumps, and patient monitors benefit from the PIC16LC924-04I/PT's integrated LCD driver, low-power CMOS design, and OTP code security that prevents external firmware read-back on calibrated medical algorithms. The 176-byte SRAM and 7 KB OTP accommodate small C-coded glucose curve lookup tables and ADC pipelines. The 8-bit A/D reads strip-impedance or optical sensors directly, while the UART/SPI interfaces export data to a host PC or Bluetooth module for telemedicine logging.
Recommended
Consumer White Goods - Washing Machines, Microwaves
The PIC16LC924-04I/PT suits washing machine, dishwasher, and microwave oven controllers because the on-chip LCD driver reduces BOM cost versus discrete LCD ASIC solutions, and the 52 I/O pins handle keypad scanning, relay drivers, motor triac control, and buzzer feedback without external muxes. OTP program memory locks the appliance firmware at production, protecting proprietary cycle algorithms. The 4 MHz instruction rate is more than sufficient for time-slice motor-control loops at 50/60 Hz line frequency.
Recommended
Automotive Instrument Cluster Auxiliary Display
Auxiliary automotive displays such as trip-computer readouts, climate-control panels, and aftermarket gauge clusters can use the PIC16LC924-04I/PT for its robust segment-LCD driver and automotive-suitable operating voltage range. The UART and SSP peripherals talk to a main CAN-equipped ECU for vehicle data while the LCD shows driver-facing information. Note that AEC-Q100 qualification status for this specific MPN is [DATA_NEEDED] - automotive designs should consult Microchip automotive-grade portfolio for fully qualified alternatives if required.
Recommended
Battery-Powered Metering and Data Loggers
Battery-powered meters such as portable energy monitors, parking meters, and remote data loggers use the PIC16LC924-04I/PT for its low-power CMOS design and ability to drive segment LCDs directly from a 3 V lithium cell without an external charge pump. The 4 MHz clock allows fast sensor reads while sleep-mode current (typically low microamps) preserves battery life across years of deployment. UART output is convenient for periodic IrDA or Bluetooth dumps to a service technician's handheld reader.
Recommended
Home Appliance User Interface Modules
Detachable or secondary UI modules in HVAC thermostats, smart-refrigerator panels, and coffee-machine front panels use the PIC16LC924-04I/PT because the integrated LCD driver plus capacitive or resistive touch-button scanning on the 52 I/O pins create a low-cost HMI subsystem that communicates with a host processor via UART or SPI. OTP program memory secures the manufacturer-specific button mapping and LCD custom-character fonts. The 10x10 mm TQFP footprint fits behind the LCD glass with no extra components.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LC924-04I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LC924-04/PT | PIC16LC924T-04I/PT | PIC16LC924-04I/L | PIC16LC924T-04I/L | PIC16LC924T-04/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 | 64-pin TQFP (10x10 mm) - same | 68-pin PLCC - different package | 68-pin PLCC - different package | 64-pin TQFP (10x10 mm) - same |
| Maximum Clock Frequency | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| Program Memory (OTP) | 7 KB (4K x 14) | 7 KB (4K x 14) | 7 KB (4K x 14) | 7 KB (4K x 14) | 7 KB (4K x 14) | 7 KB (4K x 14) |
| RAM | 176 bytes | 176 bytes | 176 bytes | 176 bytes | 176 bytes | 176 bytes |
| Temperature Grade | -40 C to +85 C (Industrial) | 0 C to +70 C (Commercial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | 0 C to +70 C (Commercial) |
| LCD Driver | Integrated, 192 segments | Integrated, 192 segments | Integrated, 192 segments | Integrated, 192 segments | Integrated, 192 segments | Integrated, 192 segments |
| A/D Channels | 13 x 8-bit | 13 x 8-bit | 13 x 8-bit | 13 x 8-bit | 13 x 8-bit | 13 x 8-bit |
| Approx. Unit Price (qty 1) | $4.12 | $3.85 | $4.18 | $4.50 | $4.55 | $3.95 |
Key Differentiators
- Integrated segment LCD driver eliminates external controller IC (vs PIC16F877A (no on-chip LCD))
- 13-channel 8-bit A/D directly on-chip (vs PIC16F84A (no A/D))
- Wide 3.0 V to 6.0 V supply tolerance supports battery and 5 V systems (vs PIC16C924 (5 V only))
Design Notes
The PIC16LC924-04I/PT operates from 3.0 V to 6.0 V and supports both 3.3 V and 5 V rails. Decouple VDD and AVDD with separate 100 nF ceramic capacitors placed within 5 mm of each supply pin; share ground at a single star point under the IC. For battery applications, use MCP1700 or similar low-Iq LDO with <2 uA quiescent current to maximize standby time. Estimated: with LCD driver disabled and MCU in sleep, total quiescent current is in the low-microamp range per Microchip datasheet.
Route the TQFP-64 (10x10 mm) package on a 4-layer PCB with continuous ground plane beneath the IC to minimize LCD segment noise coupling. Keep the LCD segment traces short and away from the switching power section. Place the 32.768 kHz crystal (if used for Timer1) within 5 mm of OSC1/OSC2 with guard ground. Per the Microchip datasheet, ensure MCLR has a 10 kohm pull-up and a 100 nF cap to ground for clean reset behavior during power-up.
OTP memory is one-time-programmable - any firmware bug requires a brand-new chip, so always prototype on a flash equivalent (PIC16F946 or PIC16F917 with the same LCD peripheral set) before committing to PIC16LC924-04I/PT production orders. Configure the LCD charge pump off when running from a regulated external bias supply, and verify the bias-resistor network matches the chosen COM/SEG multiplex duty (static, 1/2, 1/3, or 1/4). Brown-out reset (BOR) should remain enabled for industrial applications to prevent code-execution errors during supply dips.
Compliance Information
RoHS/REACH compliance status not explicitly listed in the retrieved distributor data; verification recommended against the latest Microchip material declaration. Lead-free finish confirmed by 'Pb-free' suffix in package code. AEC-Q100 not applicable - this part is in NRND status and not in Microchip's automotive-qualified portfolio; for automotive applications, dsPIC33CK128MC106-I/PT or similar AEC-Q100 qualified parts should be considered.
