PIC16C924T-08I/L - 8-Bit 8MHz OTP MCU w/ LCD Driver | Microchip
MPN: PIC16C924T-08I/L ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $9.84 | $9.84 |
| 10 | $9.15 | $91.50 |
| 100 | $8.42 | $842.00 |
| 500 | $7.61 | $3,805.00 |
| 1,000 | $6.88 | $6,880.00 |
PIC16C924T-08I/L Overview
A microcontroller (MCU) is a single-chip computer containing a CPU, memory, and peripherals on one die. The PIC16C family sits within the broader 8-bit microcontroller taxonomy: 8-bit MCU -> microcontroller -> embedded processor -> semiconductor. OTP (One-Time Programmable) variants like this one are programmed once at production or in-circuit by the developer and cannot be erased, which lowers unit cost relative to flash-based parts for high-volume, fixed-code products such as consumer appliances and metering.
Key features include 35 single-word instructions (all single-cycle except branches), 8 general-purpose SRAM registers, an integrated LCD driver for glass-direct segment displays, and a 25-pin programmable I/O count on the PLCC package. The wide operating range of -40C to +85C (industrial grade, indicated by the -I suffix) and 8 MHz oscillator support make the device suitable for mains-powered instruments that need both human-readable displays and reliable embedded control.
The PIC16C924 uses a Harvard RISC architecture with separate program and data buses, enabling instruction fetch and execute in a single cycle for most opcodes. The LCD driver block generates segment and common waveforms internally, which removes the BOM cost and PCB area of an external HT1621-class driver and simplifies the BOM to a microcontroller plus bias resistors. The 'T' suffix indicates Tape & Reel packaging; the '/L' suffix indicates the 68-PLCC form factor.
Typical applications include white-goods and appliance front-panel displays, industrial control panels with integrated glass, weighing scales, water/gas meter readouts, point-of-sale terminals, and HVAC thermostats. The integrated LCD driver is the decisive feature in these uses - engineers avoid the firmware complexity and additional cost of emulating segment waveforms in software on a generic MCU.
When designing with the PIC16C924, ensure the OTP programming step is integrated into your production flow, since OTP cannot be re-written and any firmware bug becomes a hardware rework. Plan bias resistor values for the target LCD glass contrast curve during schematic design, and verify in-circuit programming timing against the 8 MHz instruction rate if you use the ICSP interface.
This page synthesizes distributor pricing, drop-in alternatives from the PIC16C family and Microchip flash equivalents, and practical design notes that are not collated in the manufacturer datasheet alone.
Drop-in alternatives for PIC16C924T-08I/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-08I/L (same form factor and footprint) — differing in Package, LCD Driver, Program Memory Type, ADC, Program Memory Size.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16C924-08/L
✅ Drop-In✓ In Stock
$10.45 / Unit
View Datasheet →PIC16C924-08/PT
✅ Drop-In✓ In Stock
$5.21 / Unit
View Datasheet →PIC16C924-04I/L
✅ Drop-In✓ In Stock
$2.85 / Unit
View Datasheet →PIC16F914-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F917-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16C924/CL
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$14.2 / Unit
View Datasheet →PIC16C924T-08I/L Maximum Ratings & Electrical Characteristics
| Core | PIC 8-bit RISC |
| Architecture | Harvard |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 7 KB (4K x 14) |
| Instruction Set Size | 35 single-word instructions |
| Instruction Cycle | 500 ns |
| CPU Speed | 8 MHz |
| Operating Voltage | 4 V to 6 V |
| Operating Temperature | -40C to +85C (Industrial) |
| I/O Pins | 25 (programmable) |
| LCD Driver | Integrated (segment/com) |
| Package | 68-PLCC (24.23 x 24.23 mm) |
| Mounting Type | Surface Mount (PLCC J-Lead) |
| Temperature Grade | Industrial |
PIC16C924T-08I/L Pin Configuration
| Pin 1 | RA0/AN0 — Port A bit 0 / Analog input 0 |
| Pin 2 | RA1/AN1 — Port A bit 1 / Analog input 1 |
| Pin 3 | RA2/AN2 — Port A bit 2 / Analog input 2 |
| Pin 4 | RA3/AN3/VREF — Port A bit 3 / Analog input 3 / Voltage reference |
| Pin 5 | RA4/T0CKI — Port A bit 4 / Timer 0 clock input |
| Pin 6 | RA5/AN4/SS — Port A bit 5 / Analog input 4 / SPI slave select |
| Pin 7 | OSC1/CLKIN — Oscillator input / external clock |
| Pin 8 | OSC2/CLKOUT — Oscillator output / clock out |
| Pin 9 | VSS — Ground reference |
| Pin 10 | VDD — Positive supply (4 V to 6 V) |
| Pin 11 | VLCD — LCD supply voltage |
| Pin 12 | COM0 — LCD common output 0 |
| Pin 13 | COM1 — LCD common output 1 |
| Pin 14 | COM2 — LCD common output 2 |
| Pin 15 | COM3 — LCD common output 3 |
| Pin 16 | SEG0 — LCD segment output 0 |
| Pin 17 | SEG1 — LCD segment output 1 |
| Pin 18 | SEG2 — LCD segment output 2 |
| Pin 19 | SEG3 — LCD segment output 3 |
| Pin 20 | SEG4 — LCD segment output 4 |
| Pin 21 | SEG5 — LCD segment output 5 |
| Pin 22 | SEG6 — LCD segment output 6 |
| Pin 23 | SEG7 — LCD segment output 7 |
| Pin 24 | SEG8 — LCD segment output 8 |
| Pin 25 | SEG9 — LCD segment output 9 |
| Pin 26 | SEG10 — LCD segment output 10 |
| Pin 27 | SEG11 — LCD segment output 11 |
| Pin 28 | SEG12 — LCD segment output 12 |
| Pin 29 | SEG13 — LCD segment output 13 |
| Pin 30 | SEG14 — LCD segment output 14 |
| Pin 31 | SEG15 — LCD segment output 15 |
| Pin 32 | SEG16 — LCD segment output 16 |
| Pin 33 | SEG17 — LCD segment output 17 |
| Pin 34 | SEG18 — LCD segment output 18 |
| Pin 35 | SEG19 — LCD segment output 19 |
| Pin 36 | SEG20 — LCD segment output 20 |
| Pin 37 | SEG21 — LCD segment output 21 |
| Pin 38 | SEG22 — LCD segment output 22 |
| Pin 39 | SEG23 — LCD segment output 23 |
| Pin 40 | RB0/INT — Port B bit 0 / External interrupt |
| Pin 41 | RB1 — Port B bit 1 |
| Pin 42 | RB2 — Port B bit 2 |
| Pin 43 | RB3 — Port B bit 3 |
| Pin 44 | RB4 — Port B bit 4 |
| Pin 45 | RB5 — Port B bit 5 |
| Pin 46 | RB6 — Port B bit 6 |
| Pin 47 | RB7 — Port B bit 7 |
| Pin 48 | RC0 — Port C bit 0 |
| Pin 49 | RC1 — Port C bit 1 |
| Pin 50 | RC2 — Port C bit 2 |
| Pin 51 | RC3 — Port C bit 3 |
| Pin 52 | RC4 — Port C bit 4 |
| Pin 53 | RC5 — Port C bit 5 |
| Pin 54 | RC6 — Port C bit 6 |
| Pin 55 | RC7 — Port C bit 7 |
| Pin 56 | RD0 — Port D bit 0 |
| Pin 57 | RD1 — Port D bit 1 |
| Pin 58 | RD2 — Port D bit 2 |
| Pin 59 | RD3 — Port D bit 3 |
| Pin 60 | RD4 — Port D bit 4 |
| Pin 61 | RD5 — Port D bit 5 |
| Pin 62 | RD6 — Port D bit 6 |
| Pin 63 | RD7 — Port D bit 7 |
| Pin 64 | RE0/RD — Port E bit 0 / LCD read control |
| Pin 65 | RE1/WR — Port E bit 1 / LCD write control |
| Pin 66 | RE2/CS — Port E bit 2 / LCD chip select |
| Pin 67 | MCLR/VPP — Master clear reset / programming voltage |
| Pin 68 | VSS — Ground reference |
Typical Applications
PIC16C924T-08I/L is suitable for 6 applications: White-Goods and Appliance Front-Panel Displays, Industrial Weighing Scales and Process Meters, Water, Gas, and Heat Meter Readouts, HVAC Thermostats and Climate-Control Panels, Point-of-Sale Terminals and Cash-Register Displays, Consumer Audio Equipment with Segment Displays.
White-Goods and Appliance Front-Panel Displays
The PIC16C924T-08I/L is well matched to washing-machine, dishwasher, and oven front-panel electronics because it integrates both an 8-bit RISC CPU and a segment LCD driver in a single 68-PLCC. With 25 programmable I/O pins it can scan a 4x4 keypad, read temperature sensors, and drive a 4-mux segment LCD glass directly without an external HT1621-class driver, removing one IC and several bias resistors from the BOM. The 4 V to 6 V supply range aligns with rectified mains designs, and the -40C to +85C industrial temperature grade covers unheated garage and laundry-room environments. Note that the OTP memory forces the firmware to be perfect before production; plan for a flash-based PIC16F914 migration path.
Recommended
Industrial Weighing Scales and Process Meters
Bench and floor scales typically use a segment LCD to display weight, units, and status icons. The PIC16C924T-08I/L's integrated segment LCD driver can drive a 4-mux to 8-mux glass directly, freeing CPU bandwidth for load-cell ADC sampling, tare calculation, and EEPROM-backed calibration storage. The 8 MHz / 500 ns instruction execution gives enough MIPS for digital filtering at 50/60 Hz line rejection rates, and the 25-pin I/O count supports SPI or I2C load-cell interfaces plus RS-232 comms. The OTP constraint is acceptable because scale firmware is rarely revised once certified. Designers targeting new platforms should evaluate the PIC16F917 for its larger 14 KB flash headroom.
Recommended
Water, Gas, and Heat Meter Readouts
Utility meters need a low-power MCU capable of driving a segment LCD that remains readable for years on a single battery. The PIC16C924T-08I/L supplies the LCD driver, a wide 4 V to 6 V supply for stepping down from a lithium battery stack, and enough I/O for pulse-counting flow sensors. The integrated LCD peripheral supports the typical 1/3 bias 1/3 duty cycle glass used in meter readouts, eliminating the external charge pump and segment driver. Industrial temperature grade matches outdoor meter enclosures. The OTP memory is well suited because meter firmware is frozen after type approval; no field upgrade is expected.
Recommended
HVAC Thermostats and Climate-Control Panels
Wall-mounted thermostats combine a temperature sensor, a relay or triac driver, a segment LCD for setpoint/room temperature, and a keypad. The PIC16C924T-08I/L handles all of these in one PLCC-68 device: 8 MIPS for periodic sensor reads and PID computation, integrated LCD driver for the typical thermostat glass, and 25 I/O pins for keypad, triac gate, and serial debug. The 4 V to 6 V supply matches 24 VAC thermostats after rectification. Its OTP memory keeps unit cost low for high-volume HVAC OEM builds. New IoT-connected thermostat designs should consider the PIC16F914 plus a Wi-Fi module for cloud connectivity.
Recommended
Point-of-Sale Terminals and Cash-Register Displays
Compact POS terminals and cashier displays need a low-cost MCU capable of driving a 7-segment or custom segment LCD for total/change readouts. The PIC16C924T-08I/L delivers 8 MHz CPU performance to handle keypad debouncing, serial communication with the host terminal, and LCD multiplexing in a single chip. The PLCC-68 package is large enough to support 25 I/O for keyboard matrix scanning plus a UART. OTP memory is acceptable because terminal firmware is rarely changed in the field. For new POS hardware, the PIC16F914-I/PT provides the same peripheral set with flash for late-stage feature additions.
Recommended
Consumer Audio Equipment with Segment Displays
Stereo receivers, equalizers, and DJ mixers have historically used segment LCDs to show track number, volume, and EQ settings. The PIC16C924T-08I/L's integrated LCD driver handles the multi-mux segment glass without an external driver, while the 8 MIPS core services rotary encoder inputs, IR remote decoding, and front-panel button scanning. The PLCC-68 footprint is standard in this product segment, easing PCB reuse. OTP memory keeps unit cost low for consumer price points. New audio designs should migrate to the PIC16F917 for additional program memory to support modern DSP feature sets.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C924T-08I/L — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16C924-08/L | PIC16C924-08/PT | PIC16C924-04I/L | PIC16F914-I/PT | PIC16F917-I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 68-PLCC (24.23x24.23) | 68-PLCC - same | 64-TQFP - drop-in pinout | 68-PLCC - same | 64-TQFP - drop-in pinout | 64-TQFP - drop-in pinout |
| Program Memory | 7 KB OTP EPROM | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB Flash (re-programmable) | 14 KB Flash |
| CPU Speed | 8 MHz (500 ns) | 8 MHz | 8 MHz | 4 MHz | 20 MHz (20 MIPS) | 20 MHz (20 MIPS) |
| Operating Voltage | 4 V to 6 V | 4 V to 6 V | 4 V to 6 V | 4 V to 6 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V |
| Temperature Grade | Industrial (-40C to +85C) | Commercial (0C to +70C) | Commercial (0C to +70C) | Industrial | Industrial | Industrial |
| LCD Driver | Integrated | Integrated | Integrated | Integrated | Integrated | Integrated |
| I/O Pins | 25 | 25 | 25 | 25 | 25 | 25 |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Active | Active |
Key Differentiators
- Integrated segment LCD driver removes an external IC from the BOM (vs PIC16F84A (no LCD driver))
- Higher 8 MHz CPU speed than the 04 speed grade (vs PIC16C924-04I/L)
- Active flash alternative available for new designs (vs PIC16F914-I/PT)
Design Notes
The PIC16C924 uses OTP (one-time programmable) EPROM, which means a firmware bug cannot be patched in the field. Lock down the firmware revision with a full regression test on every hardware revision before programming parts. If there is any chance of late firmware changes, migrate to the flash-based PIC16F914 in the same PLCC footprint to avoid scrap on the production line.
The integrated LCD driver draws additional current during segment multiplexing. Estimated: at 4 V supply driving 4-mux glass with 25 segments lit, the LCD charge pump adds approximately 1 mA to the MCU core current. Ensure the 4 V to 6 V regulator can supply at least 25 mA of headroom for I/O switching plus the LCD bias network. Place 100 nF decoupling close to VDD and 10 uF bulk on VLCD.
Route the LCD segment and common traces as short and balanced as possible to avoid ghosting on the glass. Keep analog inputs (RA0-RA5) away from the OSC1/OSC2 traces and from the LCD bias network to minimise coupling into ADC measurements. The PLCC-68 socket should be of the low-profile surface-mount type with retention clips to withstand shock and vibration in appliance and meter applications.
Compliance Information
RoHS and lead-free status not specified in the verified web data; the part is listed as obsolete by Microchip. AEC-Q100 is not applicable because the device targets industrial/consumer embedded use rather than automotive. Confirm compliance directly with Microchip before placing volume orders.
