PIC16LCE624T-04E/SO - 4MHz 8-Bit OTP MCU, 1.75KB | Microchip
MPN: PIC16LCE624T-04E/SO ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.12 | $5.12 |
| 10 | $4.6 | $46.00 |
| 100 | $3.85 | $385.00 |
| 500 | $3.2 | $1,600.00 |
| 1,000 | $2.75 | $2,750.00 |
PIC16LCE624T-04E/SO Overview
A PIC (Peripheral Interface Controller) microcontroller is a compact integrated circuit combining an 8/16/32-bit CPU core, non-volatile program memory (Flash/ROM/OTP), volatile data RAM, and configurable digital/analog peripherals on a single silicon die. PIC microcontrollers form part of the broader microcontrollers > microprocessors > integrated circuits > semiconductors taxonomy, and have been a foundational MCU architecture since the 1980s for low-power, deterministic embedded control.
Key features of the PIC16LCE624T-04E/SO include 4MHz maximum operating frequency (200ns instruction cycle), 1024 x 14 bits of OTP program memory, 96 x 8 bytes of SRAM, a precision internal oscillator option, an on-chip analog comparator, and a watchdog timer with its own on-chip RC oscillator for reliable operation. The 8-bit RISC-like core provides 35 single-word instructions, simplifying code development and reducing overall firmware footprint compared to CISC MCUs.
Technically, the device operates at 4MHz (industry standard for low-power industrial controllers), uses an external or internal oscillator, and includes brown-out detection for reliable power-on behavior. The 'LC' prefix designates the extended commercial temperature range (-40°C to +125°C) with the lower-voltage process node, while 'E' indicates the OTP windowless package variant.
Typical applications include low-cost consumer electronics, industrial sensor interfaces, simple motor control, security alarm panels, and legacy automotive subsystems where cost-sensitive reliable control is critical. The 18-pin SOIC package also supports well hand-soldering and rework for low-volume production runs.
When designing with this device, place a 0.1uF decoupling capacitor close to VDD and ensure the MCLR reset pin is properly pulled up. The OTP memory cannot be erased or rewritten, so firmware must be fully validated before programming - consider PIC16F or PIC16LF Flash variants (e.g., PIC16F716-I/SO) for development or field-updateable firmware.
This page synthesizes distributor pricing, drop-in Microchip PIC16 family alternatives, and practical design notes not found in the manufacturer datasheet. Engineers can compare 5+ drop-in alternatives, all in the 18-SOIC footprint.
Drop-in alternatives for PIC16LCE624T-04E/SO — 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 PIC16LCE624T-04E/SO (same form factor and footprint) — differing in Operating Temperature Range, Package, Program Memory Size, RAM Size.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LCE624-04I/SO
✅ Drop-In✓ In Stock
$0.98 / Unit
View Datasheet →PIC16LCE624T-04/SO
✅ Drop-In✓ In Stock
$2.25 / Unit
View Datasheet →PIC16LCE624-04E/SO
✅ Drop-In✓ In Stock
$1.68 / Unit
View Datasheet →PIC16LCE624T-04I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F716-I/SO
✅ Drop-In✓ In Stock
$1.13 / Unit
View Datasheet →PIC16LCE624T-04E/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 8-bit RISC |
| Family | PIC16C |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 1.75 KB (1K x 14) |
| RAM Size | 96 x 8 bytes |
| Number of I/O Pins | 13 |
| Maximum CPU Speed | 4 MHz |
| Instruction Cycle | 200 ns (single-cycle, 2-cycle for branches) |
| Number of Instructions | 35 |
| Supply Voltage | 3.3V / 5V (PIC16LC low-voltage family) |
| Oscillator Type | External / Internal |
| Operating Temperature Range | -40C to +125C (extended) |
| Package | 18-SOIC (300 mil) |
| Mounting Type | Surface Mount |
| Packaging | Tube |
| On-Chip Peripherals | Watchdog Timer, Analog Comparator, Brown-Out Reset |
PIC16LCE624T-04E/SO Pin Configuration
| Pin 1 | RA2 — Digital I/O pin (PORTA bit 2) |
| Pin 2 | RA3 — Digital I/O pin (PORTA bit 3) |
| Pin 3 | RA4/T0CKI — Digital I/O / Timer0 clock input (PORTA bit 4) |
| Pin 4 | MCLR/VPP — Master Clear reset input / Programming voltage |
| Pin 5 | VSS — Ground reference |
| Pin 6 | RB0/INT — Digital I/O / External interrupt (PORTB bit 0) |
| Pin 7 | RB1 — Digital I/O pin (PORTB bit 1) |
| Pin 8 | RB2 — Digital I/O pin (PORTB bit 2) |
| Pin 9 | RB3 — Digital I/O pin (PORTB bit 3) |
| Pin 10 | RB4 — Digital I/O / Interrupt-on-change (PORTB bit 4) |
| Pin 11 | RB5 — Digital I/O / Interrupt-on-change (PORTB bit 5) |
| Pin 12 | RB6 — Digital I/O / Interrupt-on-change / ICSP clock (PORTB bit 6) |
| Pin 13 | RB7 — Digital I/O / Interrupt-on-change / ICSP data (PORTB bit 7) |
| Pin 14 | VDD — Positive supply voltage (3.3V or 5V) |
| Pin 15 | OSC2/CLKOUT — Oscillator crystal output / Clock output |
| Pin 16 | OSC1/CLKIN — Oscillator crystal input / External clock input |
| Pin 17 | RA0 — Digital I/O pin (PORTA bit 0) |
| Pin 18 | RA1 — Digital I/O pin (PORTA bit 1) |
Typical Applications
PIC16LCE624T-04E/SO is suitable for 6 applications: Industrial Sensor Interface, Consumer Appliance Control, Security Alarm Panels, HVAC Thermostat Control, Automotive Interior Accessories, Legacy Industrial Control Replacement.
Industrial Sensor Interface
The PIC16LCE624T-04E/SO's 13 I/O pins, 4MHz CPU speed, and on-chip analog comparator make it ideal for industrial sensor interface modules including 4-20mA loop transmitters, RTD signal conditioning, and limit-switch debouncers. The 1.75KB OTP program memory accommodates typical sensor processing routines including linearization, calibration, and HART or Modbus framing. Operating from -40C to +125C with 3.3V/5V supply tolerance, the device survives industrial temperature swings and noisy supply rails. Placed near the sensor with a 0.1uF decoupling capacitor, it converts analog sensor signals to digital outputs with deterministic 200ns instruction timing.
Recommended
Consumer Appliance Control
The PIC16LCE624T-04E/SO is well-suited for cost-sensitive consumer appliances such as coffee makers, washing machine controllers, microwave oven keypads, and small kitchen appliances. The 35-instruction RISC architecture simplifies firmware development and produces highly compact code that fits within the 1.75KB OTP memory. With 13 I/O pins it drives LEDs, relays, keypads, and seven-segment displays without external glue logic. The 4MHz CPU speed is more than adequate for relay sequencing, timer-based cooking cycles, and user-interface polling at deterministic 200ns per instruction.
Recommended
Security Alarm Panels
The PIC16LCE624T-04E/SO powers legacy security alarm panels by handling zone-input scanning, siren output control, and keypad decoding. The on-chip watchdog timer with independent RC oscillator prevents firmware lockup - critical for safety systems that must never freeze. The 96-byte RAM is sufficient for zone state tracking, event buffering, and keypad debounce variables. Brown-out reset ensures clean power-on behavior, and the extended -40C to +125C temperature range supports garage and outdoor installations. With 13 I/O pins it interfaces directly to PIR sensors, magnetic reed switches, and piezo sirens.
Recommended
HVAC Thermostat Control
The PIC16LCE624T-04E/SO provides deterministic temperature control in HVAC thermostats and building automation nodes. Its analog comparator enables direct thermistor interfacing without an external ADC, and the 4MHz CPU speed handles PID control loops with sub-millisecond update rates. The OTP memory is ideal for fixed-setpoint thermostats where firmware is identical across production units. Operating from 3.3V/5V, the device interfaces directly to relay driver stages, triac optocouplers, and LCD segment drivers. The extended -40C to +125C range supports rooftop and attic installations.
Recommended
Automotive Interior Accessories
The PIC16LCE624T-04E/SO drives automotive interior accessories such as seat controllers, mirror adjusters, and dashboard backlight controllers. Its extended -40C to +125C operating range handles under-dash thermal stress, and the 13 I/O pins drive H-bridge motor drivers, LED PWM channels, and CAN/LIN transceivers. The 4MHz CPU speed executes switch-debounce, motor-position feedback, and PWM generation routines with predictable timing. The OTP memory keeps BOM cost low for high-volume automotive accessories. However, for safety-critical automotive applications choose the AEC-Q100 qualified PIC16F variant.
Recommended
Legacy Industrial Control Replacement
The PIC16LCE624T-04E/SO is commonly used to repair and maintain legacy industrial equipment originally designed in the 1990s and 2000s, when the PIC16C/LC series was the dominant 8-bit MCU. Its drop-in compatibility with the PIC16LCE624-04I/SO and similar variants makes it a direct form-fit-function replacement for end-of-life equipment where redesign is too costly. With 1.75KB OTP, 96B RAM, and 4MHz operation, it replicates original control logic for motor starters, conveyor controllers, and machine tool interfaces. For long-term reliability, engineers should stock sufficient inventory or migrate to the Flash-based PIC16F716-I/SO.
Recommended Products Summary
Engineering reference data for PIC16LCE624T-04E/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LCE624-04I/SO | PIC16LCE624T-04/SO | PIC16LCE624-04E/SO | PIC16LCE624T-04I/SO | PIC16F716-I/SO |
|---|---|---|---|---|---|---|
| Package | 18-SOIC (300 mil) | 18-SOIC - same | 18-SOIC - same | 18-SOIC - same | 18-SOIC - same | 18-SOIC - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | PIC 8-bit | PIC 8-bit | PIC 8-bit | PIC 8-bit | PIC 8-bit | PIC 8-bit |
| Program Memory | 1.75 KB OTP | 1.75 KB OTP | 1.75 KB OTP | 1.75 KB OTP | 1.75 KB OTP | 2 KB Flash (rewritable) |
| Max CPU Speed | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz (matches) |
| I/O Pins | 13 | 13 | 13 | 13 | 13 | 13 (same) |
| Lifecycle | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Active (recommended for new designs) |
| Memory Type | OTP (one-time) | OTP | OTP | OTP | OTP | Flash (rewritable, +15% memory) |
Key Differentiators
- Extended temperature grade -40C to +125C (vs PIC16LCE624-04I/SO)
- OTP windowless package for low BOM cost (vs PIC16LCE624-04I/SO)
- Flash-memory drop-in alternative available (vs PIC16F716-I/SO)
Design Notes
Place a 0.1uF ceramic decoupling capacitor as close as possible to the VDD pin (pin 14) of the PIC16LCE624T-04E/SO. Add a 10uF bulk capacitor on the same supply rail if the device drives inductive loads (relays, motors). The PIC16LC low-voltage family draws typically 2-5 mA active at 4MHz and 1uA sleep current at 3.3V, so power supply filtering is essential for stable brown-out-reset operation. Source: Microchip datasheet 30298e, Section 7.0.
The 'E' suffix in PIC16LCE624T-04E/SO indicates OTP (windowless) package - the program memory CANNOT be erased or rewritten after programming. Validate firmware thoroughly before committing to OTP programming. For development and field updates, use the Flash-based PIC16F716-I/SO instead, which is pin-to-pin compatible with the same 18-SOIC footprint. Brown-out-reset (BOR) configuration bits must also be programmed before OTP programming, as they cannot be changed later.
Route the MCLR pin (pin 4) with a 10k pull-up resistor to VDD and a 100nF capacitor to VSS for clean power-on reset behavior. Keep the crystal/oscillator traces (OSC1, OSC2) short and away from high-current switching traces to avoid injection of noise into the clock signal. For the 18-SOIC package, ensure the land pattern matches JEDEC SO-127-P-300 standard for reliable reflow soldering. The exposed thermal pad on the SOIC (if any) should be soldered to a copper pour for improved thermal dissipation in high-temperature environments.
Compliance Information
Compliance data not explicitly stated in verified web data. The 'E' suffix indicates OTP windowless ceramic package per Microchip naming convention, but RoHS/REACH status requires datasheet verification. PIC16LC series predates widespread RoHS adoption and may require lead-containing solder variants for legacy systems.