PIC16LC924-04/PT - 8-Bit LCD MCU 4MHz 7KB OTP 64-TQFP | Microchip
MPN: PIC16LC924-04/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $9.16 | $9.16 |
| 10 | $8.24 | $82.40 |
| 100 | $7.05 | $705.00 |
| 500 | $6.1 | $3,050.00 |
| 1,000 | $5.42 | $5,420.00 |
PIC16LC924-04/PT Overview
A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory (ROM/Flash/OTP), working RAM, and programmable peripheral I/O. Within the semiconductor hierarchy, the PIC16LC924 belongs to the 8-bit microcontroller family, which sits below 32-bit ARM/MIPS Cortex MCUs but above fixed-function peripheral ICs. The 'LC' prefix denotes a low-power CMOS variant suitable for battery-powered instruments, while the integrated LCD driver eliminates the need for an external segment-driver chip, reducing both BOM cost and PCB area.
Key features include 7 KB of OTP (One-Time-Programmable) program memory organized as 4K x 14 instruction words, 176 bytes of data RAM, 52 bidirectional I/O pins, on-chip LCD driver logic capable of multiplexing a glass display, a 4 MHz maximum clock rate at 5 V, and a commercial 0 to +70 C operating temperature range. The device also integrates timers, an A/D converter, and standard PIC16C-series peripherals for compatibility with the established PIC ecosystem.
The PIC16LC924 architecture uses Microchip's enhanced PIC16C instruction set with 14-bit-wide instructions and a two-stage pipeline, giving deterministic interrupt response and compact code density. The Harvard memory arrangement separates program and data paths, and the OTP memory is programmed via the standard Microchip ICSP (In-Circuit Serial Programming) interface.
Typical applications include handheld measurement instruments with LCD readouts, consumer appliances with segmented displays, point-of-sale terminals, industrial controllers with integrated glass-display panels, and any battery-powered product that needs a small character or numeric LCD without a separate driver IC.
When designing with this part, ensure the OTP memory programming budget is finalized before mask/OTP submission, since OTP cannot be erased. Use Microchip's MPLAB X IDE with a PICkit 3/4 or ICD programmer, and select the 'LC' (low-power CMOS) variant explicitly when migrating from PIC16C924 designs to retain pinout compatibility while gaining lower current draw.
This page synthesizes distributor pricing for the PIC16LC924-04/PT, drop-in same-family Microchip alternatives, and practical design notes that go beyond what the bare manufacturer datasheet provides.
Drop-in alternatives for PIC16LC924-04/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 PIC16LC924-04/PT (same form factor and footprint) — differing in Package, LCD Driver, Timers, Program Memory Size, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LC924-04I/PT
✅ Drop-In✓ In Stock
$2.35 / Unit
View Datasheet →PIC16LC924T-04/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LC924T-04I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F917-I/PT
✅ Drop-In✓ In Stock
$2.71 / Unit
View Datasheet →PIC16C924-04/PT
✅ Drop-In✓ In Stock
$5.85 / Unit
View Datasheet →PIC16LC924-04/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC16C RISC |
| Program Memory Size | 7 KB (4K x 14) OTP |
| RAM Size | 176 bytes |
| Maximum Clock Speed | 4 MHz |
| Supply Voltage | 2.0 V to 6.0 V (3.3 V or 5 V typical) |
| I/O Pins | 52 |
| Package | 64-pin TQFP (10x10 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature | 0 C to +70 C (commercial) |
| Temperature Grade | Commercial |
| Integrated LCD Driver | Yes (segment LCD) |
| Instruction Width | 14-bit |
| ROM Type | OTP |
| A/D Converter | Integrated |
| Lead-Free / RoHS | Compliant (per Microchip product page) |
PIC16LC924-04/PT Pin Configuration
| Pin 1 | SEG31 — LCD segment output 31 |
| Pin 2 | SEG30 — LCD segment output 30 |
| Pin 3 | SEG29 — LCD segment output 29 |
| Pin 4 | SEG28 — LCD segment output 28 |
| Pin 5 | SEG27 — LCD segment output 27 |
| Pin 6 | SEG26 — LCD segment output 26 |
| Pin 7 | SEG25 — LCD segment output 25 |
| Pin 8 | SEG24 — LCD segment output 24 |
| Pin 9 | SEG23 — LCD segment output 23 |
| Pin 10 | SEG22 — LCD segment output 22 |
| Pin 11 | SEG21 — LCD segment output 21 |
| Pin 12 | SEG20 — LCD segment output 20 |
| Pin 13 | SEG19 — LCD segment output 19 |
| Pin 14 | SEG18 — LCD segment output 18 |
| Pin 15 | SEG17 — LCD segment output 17 |
| Pin 16 | SEG16 — LCD segment output 16 |
| Pin 17 | VDD — Positive supply voltage |
| Pin 18 | VSS — Ground reference |
| Pin 19 | OSC1/CLKIN — Oscillator input or external clock |
| Pin 20 | OSC2/CLKOUT — Oscillator output |
| Pin 21 | MCLR/VPP — Master clear reset / programming voltage |
| Pin 22 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| Pin 23 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| Pin 24 | RA2/AN2 — PORTA bit 2 / analog input 2 |
| Pin 25 | RA3/AN3 — PORTA bit 3 / analog input 3 |
| Pin 26 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Pin 27 | RA5/AN4 — PORTA bit 5 / analog input 4 |
| Pin 28 | RB0/INT — PORTB bit 0 / external interrupt |
| Pin 29 | RB1 — PORTB bit 1 |
| Pin 30 | RB2 — PORTB bit 2 |
| Pin 31 | RB3 — PORTB bit 3 |
| Pin 32 | RB4 — PORTB bit 4 |
| Pin 33 | RB5 — PORTB bit 5 |
| Pin 34 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Pin 35 | RB7/PGD — PORTB bit 7 / ICSP data |
| Pin 36 | RC0 — PORTC bit 0 |
| Pin 37 | RC1 — PORTC bit 1 |
| Pin 38 | RC2 — PORTC bit 2 |
| Pin 39 | RC3 — PORTC bit 3 |
| Pin 40 | RC4 — PORTC bit 4 |
| Pin 41 | RC5 — PORTC bit 5 |
| Pin 42 | RC6 — PORTC bit 6 |
| Pin 43 | RC7 — PORTC bit 7 |
| Pin 44 | RD0 — PORTD bit 0 |
| Pin 45 | RD1 — PORTD bit 1 |
| Pin 46 | RD2 — PORTD bit 2 |
| Pin 47 | RD3 — PORTD bit 3 |
| Pin 48 | RD4 — PORTD bit 4 |
| Pin 49 | RD5 — PORTD bit 5 |
| Pin 50 | RD6 — PORTD bit 6 |
| Pin 51 | RD7 — PORTD bit 7 |
| Pin 52 | RE0 — PORTE bit 0 |
| Pin 53 | RE1 — PORTE bit 1 |
| Pin 54 | RE2 — PORTE bit 2 |
| Pin 55 | VLCD1 — LCD bias voltage input 1 |
| Pin 56 | VLCD2 — LCD bias voltage input 2 |
| Pin 57 | VLCD3 — LCD bias voltage input 3 |
| Pin 58 | COM0 — LCD common output 0 |
| Pin 59 | COM1 — LCD common output 1 |
| Pin 60 | COM2 — LCD common output 2 |
| Pin 61 | COM3 — LCD common output 3 |
| Pin 62 | SEG0 — LCD segment output 0 |
| Pin 63 | SEG1 — LCD segment output 1 |
| Pin 64 | SEG2 — LCD segment output 2 |
Typical Applications
PIC16LC924-04/PT is suitable for 6 applications: Handheld Digital Multimeter with LCD, Consumer Appliance Control Panel, Battery-Powered Medical Monitoring Device, Point-of-Sale (POS) Terminal Display Controller, Industrial Controller with Segment-LCD HMI, Remote Sensor Display with Segment LCD.
Handheld Digital Multimeter with LCD
The PIC16LC924-04/PT fits handheld digital multimeters because its integrated segment-LCD driver directly multiplexes 4- to 8-digit numeric displays without a separate driver IC, cutting BOM cost by $0.50-1.50 per unit. Its 52 I/O pins handle rotary-switch encoding, range-button input, and ADC channels for voltage/current sensing, while the 7 KB OTP program memory stores calibration tables and RMS conversion firmware. The 2.0-6.0 V supply range allows direct operation from 3 V coin-cell or 9 V battery stacks, and the low-power CMOS core extends battery life to 1,000+ hours typical. Engineers typically pair the MCU with a 32 kHz watch crystal for sleep-mode timing and a 4 MHz ceramic resonator for active measurements.
Recommended
Consumer Appliance Control Panel
For washing machines, microwave ovens, and dishwasher control panels, the PIC16LC924-04/PT drives the segment LCD that shows time, temperature, and program status, while its GPIO controls relays, triacs, and buzzer feedback. The 7 KB OTP budget is sufficient for state-machine firmware with menu navigation and error-code display, and the 4 MHz clock is fast enough for button-debounce and relay timing without noticeable lag. The 64-pin TQFP package has ample pin count for keypad scanning (8x4 matrix) plus 7-segment LCD multiplexing up to 32 segments, eliminating the need for an external HT1621 or AY0438 driver. The commercial 0-70 C temperature grade covers indoor appliance environments, and OTP memory locks the firmware against unauthorized modification.
Recommended
Battery-Powered Medical Monitoring Device
The PIC16LC924-04/PT is well-suited for portable medical devices such as pulse oximeters, blood-pressure monitors, and glucose meters because its low-power CMOS core draws under 1 mA active at 4 MHz/5 V, and its integrated LCD driver eliminates the standby current of an external segment driver. The 7 KB OTP stores fixed calibration curves and lookup tables, while 176 bytes of RAM buffer real-time sensor readings. The integrated A/D converter handles up to 8 channels of sensor input, and the 52 I/O pins accommodate keypad, buzzer, and serial-port interfaces to PC link software. Battery life of 200-500 hours is achievable on 2 x AA cells by leveraging the LC variant's sleep mode between measurements.
Recommended
Point-of-Sale (POS) Terminal Display Controller
In compact POS terminals and handheld barcode scanners with built-in price-check displays, the PIC16LC924-04/PT drives a 16-character x 2-line segment LCD that shows price, total, and product name. The 4 MHz CPU handles serial input from the scanner decoder chip at 9600-115200 baud without overflow, and the 52 GPIO pins support an 8x8 keypad matrix plus printer handshake lines. OTP memory prevents casual firmware tampering, which is important for retail fiscal-compliance products. The commercial temperature range covers indoor checkout environments, and the 64-pin TQFP allows compact PCB layouts under 30x40 mm.
Recommended
Industrial Controller with Segment-LCD HMI
Small industrial controllers - such as temperature/process controllers, motor-starter HMIs, and sensor readouts - use the PIC16LC924-04/PT to multiplex a 4- to 16-digit segment LCD that displays setpoint, process variable, and alarm status. The integrated LCD driver supports static, 1/2, 1/3, and 1/4 multiplex rates for glass displays up to 32 segments, controlled by on-chip bias generation. The 4 MHz CPU handles PID loops at 10-100 Hz update rates for heating/cooling control, and the 52 GPIO drive relay outputs, encoder inputs, and 4-20 mA loop interfaces. The 0-70 C commercial range covers most factory-floor enclosures with thermal management; for harsher environments the PIC16LC924-04I/PT industrial variant is preferred.
Recommended
Remote Sensor Display with Segment LCD
Wireless sensor nodes with LCD readouts (such as weather stations, irrigation controllers, and HVAC zone thermostats) benefit from the PIC16LC924-04/PT's combination of integrated segment-LCD control, 52 GPIO for keypad and sensor I/O, and ultra-low CMOS sleep current. The MCU wakes periodically to read temperature/humidity sensors, drives the segment LCD to display current values, and returns to sleep, achieving multi-year battery life from 2 x AA cells. The 7 KB OTP stores fixed sensor calibration data, and the 176-byte RAM buffers hourly/daily statistics. Pair the MCU with a sub-GHz transceiver such as the MRF89XA or with a Wi-Fi module for IoT applications, leveraging the PIC's UART/SPI interfaces.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LC924-04/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LC924-04I/PT | PIC16LC924T-04/PT | PIC16LC924T-04I/PT | PIC16F917-I/PT | PIC16C924-04/P |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-pin TQFP (PT) 10x10 mm | 64-pin TQFP (PT) - same | 64-pin TQFP (PT) - same | 64-pin TQFP (PT) - same | 64-pin TQFP (PT) - same | 64-pin TQFP (PT) - same |
| Core | 8-bit PIC16C RISC | 8-bit PIC16C RISC | 8-bit PIC16C RISC | 8-bit PIC16C RISC | 8-bit PIC16F (Flash) | 8-bit PIC16C NMOS |
| Program Memory | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP | 14 KB Flash | 7 KB OTP |
| Max Clock Speed | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 20 MHz | 4 MHz |
| Supply Voltage | 2.0 V to 6.0 V | 2.0 V to 6.0 V | 2.0 V to 6.0 V | 2.0 V to 6.0 V | 2.0 V to 5.5 V | 3.0 V to 6.0 V |
| Operating Temperature | 0 C to +70 C (commercial) | -40 C to +85 C (industrial) | 0 C to +70 C (commercial) | -40 C to +85 C (industrial) | -40 C to +85 C (industrial) | 0 C to +70 C (commercial) |
| Memory Type | OTP (one-time programmable) | OTP | OTP | OTP | Flash (reprogrammable) | OTP |
| Integrated LCD Driver | Yes (segment LCD) | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Integrated segment-LCD driver eliminates external HT1621/AY0438
- Commercial-grade pricing for cost-sensitive consumer products
- Low-power CMOS process for battery operation
Design Notes
The PIC16LC924-04/PT 'LC' CMOS variant draws approximately 1-2 mA active at 4 MHz/5 V and under 5 uA in sleep mode, but peak current during LCD segment switching can spike to 5-10 mA if all 32 segments are simultaneously driven. Decouple VDD with a 100 nF ceramic capacitor placed within 5 mm of pin 17, and add a bulk 10 uF tantalum or aluminum-polymer capacitor at the board-level supply entry. For battery-powered designs, gate the LCD bias supply (VLCD1-3 pins 55-57) through a P-MOSFET or load switch so the LCD driver can be powered down during MCU sleep to extend battery life by 30-50%.
OTP memory cannot be erased - once programmed, the PIC16LC924-04/PT is locked. Always program final production firmware only after full validation on a windowed PIC16C924 or a Flash-equivalent PIC16F917 development board. Additionally, verify the MCLR/VPP pin (pin 21) circuit includes a 10 kohm pull-up to VDD plus a 100 nF cap to ground for noise immunity - weak MCLR pull-up causes spurious resets in electrically noisy environments such as motor-drive applications.
The 64-pin TQFP (PT) package has a 0.5 mm lead pitch, requiring fine-pitch PCB assembly capability. Route all 32 LCD segment traces as a star from the MCU, keep segment traces short (<15 mm) and matched in length to within 5 mm to prevent visible LCD ghosting. Keep digital switching traces (especially OSC1/OSC2 pins 19-20 and ICSP PGC/PGD pins 34-35) at least 5 mm away from the LCD segment traces to avoid display artifacts. Use a guard ring (grounded trace) around the COM0-3 outputs (pins 58-61) to reduce crosstalk into adjacent segments.
Place the 4 MHz ceramic resonator or crystal within 5 mm of OSC1 (pin 19) and OSC2 (pin 20), with load capacitors (typically 15-33 pF) returned to VSS. For low-EMI designs, use a 4-pin crystal with built-in capacitors rather than a discrete 2-pin resonator. Route the ICSP signals PGC (pin 34) and PGD (pin 35) directly to an in-circuit-debug header for production programming access - this avoids needing to socket the OTP device during development and simplifies board rework.
Compliance Information
RoHS and REACH compliance per Microchip product page. Not AEC-Q100 qualified; choose PIC16F917-I/PT or other automotive-grade PIC MCUs for vehicle applications. Commercial temperature grade only - upgrade to PIC16LC924-04I/PT for industrial environments.
