PIC16LCE624-04I/P - 1.75KB OTP 8-bit MCU, 4MHz | Microchip
MPN: PIC16LCE624-04I/P ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.63 | $2.63 |
| 10 | $2.41 | $24.10 |
| 100 | $2.19 | $219.00 |
| 500 | $1.99 | $995.00 |
| 1,000 | $1.85 | $1,850.00 |
PIC16LCE624-04I/P Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, data memory, and peripherals. The PIC16LCE624 belongs to Microchip's mid-range PIC16 family, which uses a 14-bit instruction set and Harvard architecture to deliver deterministic interrupt latency and predictable execution timing, while the 'L' suffix denotes the low-voltage (2.5V-5.5V) operation characteristic of this product line. This positions the device within the hierarchy of MCU -> 8-bit MCU -> microcontroller -> embedded processor -> semiconductor.
Key features include a 4MHz maximum operating clock frequency, 1.75KB (1K x 14) One-Time-Programmable (OTP) program memory, 96 bytes of data RAM, 128 bytes of EEPROM data memory, an internal analog comparator, capture/compare/PWM (CCP) module, and a 10-bit ADC that distinguishes this MCU from the smaller PIC16CE62x siblings.
The architecture combines a RISC instruction set with Harvard bus separation, allowing simultaneous instruction fetch and data access. The wide 2.5V-5.5V operating range supports both 3.3V and 5V designs, while the OTP memory allows rapid prototyping and low-volume production without the cost of windowed or flash devices. Built-in peripherals minimize external component count, lowering BOM cost for cost-sensitive embedded designs.
Typical applications include low-power industrial control loops, sensor interface front-ends, consumer appliance controllers, and legacy product maintenance systems where original PIC16CE624 sockets need a low-voltage drop-in replacement. The 18-pin DIP package simplifies prototyping on breadboards and through-hole PCB assemblies.
When designing with this part, note that OTP memory cannot be reprogrammed; if in-field updates are required, choose a flash-based sibling such as PIC16F62x. Always include a 0.1uF decoupling capacitor on VDD adjacent to the pin, and respect the absolute maximum VDD of 6.5V to avoid latch-up.
This page synthesizes current distributor pricing for the PIC16LCE624-04I/P, an 8-MHz-limited 4MHz drop-in alternatives list, and practical design notes that complement the manufacturer datasheet rather than duplicate it.
Drop-in alternatives for PIC16LCE624-04I/P — 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 PIC16LCE624-04I/P (same form factor and footprint) — differing in Package, Instruction Cycle Time, Operating Temperature, Timers, Mounting Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LCE624-04E/P
✅ Drop-In✓ In Stock
$4.05 / Unit
View Datasheet →PIC16CE624-04I/P
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.94 / Unit
View Datasheet →PIC16LCE623-04/P
✅ Drop-In✓ In Stock
$1.45 / Unit
View Datasheet →PIC16LC711-04I/P
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
PIC16F628A-I/P
✅ Drop-In✓ In Stock
$1.62 / Unit
View Datasheet →PIC16LCE624-04I/P Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC RISC (Harvard) |
| Instruction Set | 14-bit (mid-range) |
| Program Memory | 1.75 KB (1K x 14) OTP |
| Data RAM | 96 bytes |
| EEPROM Data Memory | 128 bytes |
| I/O Pins | 13 |
| Maximum Clock Frequency | 4 MHz |
| Operating Voltage (VDD) | 2.5 V to 5.5 V |
| ADC | 10-bit (single channel) |
| Analog Comparator | Yes (internal) |
| Capture/Compare/PWM (CCP) | 1 module |
| Timers | Timer0, Timer1, Timer2 |
| Package | 18-pin DIP (0.300 inch, 7.62mm) |
| Mounting Type | Through-Hole |
| Temperature Grade | Industrial (-40C to +85C) |
| Pin Count | 18 |
| MSL Level | Not applicable (non-SMD) |
| RoHS Status | Compliant |
PIC16LCE624-04I/P Pin Configuration
| Pin 1 | RA2/AN2 — GPIO / analog input channel 2 |
| Pin 2 | RA3/AN3 — GPIO / analog input channel 3 |
| Pin 3 | RA4/T0CKI — GPIO / Timer0 clock input |
| Pin 4 | RA5/MCLR/VPP — GPIO / Master Clear (reset) / programming voltage |
| Pin 5 | VSS — Ground reference |
| Pin 6 | RB0/INT — GPIO / external interrupt input |
| Pin 7 | RB1 — GPIO port B bit 1 |
| Pin 8 | RB2 — GPIO port B bit 2 |
| Pin 9 | RB3/PGM — GPIO / low-voltage programming input |
| Pin 10 | RB4 — GPIO port B bit 4 |
| Pin 11 | RB5 — GPIO port B bit 5 |
| Pin 12 | RB6/PGC — GPIO / ICSP clock input |
| Pin 13 | RB7/PGD — GPIO / ICSP data input/output |
| Pin 14 | VDD — Positive supply voltage (2.5V-5.5V) |
| Pin 15 | OSC2/CLKOUT — Oscillator output / clock output |
| Pin 16 | OSC1/CLKIN — Oscillator input / external clock input |
| Pin 17 | RC0 — GPIO port C bit 0 |
| Pin 18 | RC1 — GPIO port C bit 1 |
Typical Applications
PIC16LCE624-04I/P is suitable for 6 applications: Low-Power Industrial Control, Consumer Appliance Controllers, Legacy Equipment Maintenance, Sensor Interface Front-Ends, Battery-Powered Embedded Nodes, Educational and Hobbyist Prototyping.
Low-Power Industrial Control
The PIC16LCE624-04I/P fits low-power industrial control applications because of its 2.5V-5.5V operating range, 4MHz max clock, and built-in 10-bit ADC plus analog comparator, which eliminate external signal-conditioning parts in a typical sensor-interface loop. The 13 GPIO pins comfortably drive status LEDs, optocouplers, and relay coils directly, each rated to 25mA source/sink per pin, and the 128-byte EEPROM provides non-volatile storage for calibration constants and trip thresholds. Compared with switching to a discrete analog front end, this single-chip integration simplifies regulator cleanup, expand headroom for hysteresis design, and reduces BOM cost in PLC-style input modules, limit-switch interfaces, and process-control sensor nodes that operate from a 24V industrial bus stepped down to 5V.
Recommended
Consumer Appliance Controllers
The PIC16LCE624-04I/P is a strong fit for cost-sensitive consumer appliance controllers such as coffee machines, washing-machine sub-modules, and HVAC damper actuators. The wide 2.5V-5.5V supply accepts both 3.3V sensor rails and 5V relay-driver rails directly, while the integrated 10-bit ADC reads thermistor and pressure-sensor analog signals without an external converter. OTP memory prevents field firmware tampering, an asset for safety-certified appliance designs, and the 18-pin DIP package simplifies through-hole PCB assembly favored in low-volume appliance production. Compared to a 32-bit MCU, this part delivers just enough MIPS at 4MHz with deterministic interrupts for simple PID loops, while reducing unit cost and regulator thermal stress in compact appliance enclosures.
Recommended
Legacy Equipment Maintenance
The PIC16LCE624-04I/P supports legacy equipment maintenance by offering a pin-compatible low-voltage replacement for the original PIC16CE624 used in 1990s-2000s-era embedded controllers. Its 18-pin DIP footprint matches the original through-hole PCB pads, eliminating the need for adapter boards or rewiring when a service shop replaces a failed original MCU. The OTP memory is intentional here because the firmware image is already validated, and the low-voltage 2.5V-5.5V range matches modernized 3.3V power rails that have replaced the original 5V supplies. Compared to redesigning the legacy system around a new MCU, this drop-in replacement shortens Mean Time To Repair (MTTR), preserves mechanical fit, and keeps test fixtures valid for industrial controls, elevator sub-boards, and specialty machinery still in service worldwide.
Recommended
Sensor Interface Front-Ends
The PIC16LCE624-04I/P is well suited to sensor interface front-ends because its on-chip 10-bit ADC, internal analog comparator, and CCP/PWM peripherals cover the typical signal-conditioning and actuator-drive tasks in a single IC. Operating from 2.5V-5.5V, the device can be powered directly from a single-cell Li-ion pack (3.7V nominal) or from a regulated 5V rail in industrial instrumentation. The 96-byte RAM and 1.75KB OTP support small FSMs that scan a sensor, debounce inputs, and drive a PWM output to a fan or heater without an external DSP. Compared with a discrete op-amp + comparator + timer design, this single-chip integration lowers quiescent current, reduces PCB area, and gives the design engineer a software-configurable update rate that is impractical to achieve with hard-wired analog circuits.
Recommended
Battery-Powered Embedded Nodes
The PIC16LCE624-04I/P works in battery-powered embedded nodes thanks to its low-voltage 2.5V-5.5V operation and the inherent low power of the 8-bit PIC core at 4MHz. Sleep current at 3.0V is in the microamp range, allowing duty-cycled wake-up schedules for remote sensors that spend most of their life in standby, waking only to take a measurement and transmit. The 128-byte EEPROM retains calibration data across sleep cycles without external non-volatile memory, and the 13 GPIO pins provide enough channels for a UART bit-banged interface to a low-power RF module. Compared to higher-MIPS 32-bit MCUs, this part trades processing speed for far lower active and sleep current, which is the deciding factor for solar or coin-cell powered sensor nodes where energy budget dominates BOM choice.
Recommended
Educational and Hobbyist Prototyping
The PIC16LCE624-04I/P is a strong match for educational and hobbyist prototyping because the 18-pin DIP package drops directly into a solderless breadboard, allowing students to build and test circuits without a custom PCB. The 4MHz clock limit is intentional, ensuring students can calculate timing by hand and verify instruction cycles on an oscilloscope or logic analyzer. The OTP memory teaches the practical engineering trade-off between one-time-programmable cost and flash reprogrammability, while the 13 GPIO pins cover classic projects such as LED chasers, servo drivers, and serial-monitored thermometers. Compared with modern 32-bit dev boards, this part constrains the design to fundamentals - I/O, timers, and ADC - building the foundation engineers need before adopting more complex microcontrollers.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LCE624-04I/P — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LCE624-04E/P | PIC16CE624-04I/P | PIC16LCE623-04/P | PIC16LC711-04I/P | PIC16F628A-I/P |
|---|---|---|---|---|---|---|
| Package | 18-pin DIP | 18-pin DIP - same | 18-pin DIP - same | 18-pin DIP - same | 18-pin DIP - same | 18-pin DIP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 1.75 KB OTP | 1.75 KB OTP | 1.75 KB EPROM (windowed) | 896 B (0.875 KB) OTP | 1.75 KB OTP | 3.5 KB Flash |
| Max Clock | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 20 MHz |
| Operating Voltage | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 4.0 V to 6.0 V | 2.5 V to 5.5 V | 2.5 V to 6.0 V | 2.0 V to 5.5 V |
| ADC | 10-bit, multi-channel | 10-bit, multi-channel | 10-bit, multi-channel | No ADC | 8-bit, multi-channel | No ADC (comparator only) |
| Memory Type | OTP | OTP | EPROM (windowed) | OTP | OTP | Flash |
| Lifecycle | NRND | Active | Obsolete | NRND | Obsolete | Active |
Key Differentiators
- Low-voltage 2.5V-5.5V operation with integrated 10-bit ADC (vs PIC16CE624-04I/P)
- One-Time-Programmable memory prevents firmware tampering (vs PIC16F628A-I/P)
- Built-in 10-bit ADC eliminates external converter in sensor nodes (vs PIC16LCE623-04/P)
Design Notes
Place a 0.1uF ceramic decoupling capacitor as close as possible to the VDD pin (pin 14) of the PIC16LCE624-04I/P, with a 10uF bulk capacitor on the same supply rail to handle inrush during oscillator startup. For battery-powered designs, switch the MCU into SLEEP mode between sensor reads and rely on the internal analog comparator as a wake-up source; according to the manufacturer datasheet, sleep current is in the microamp range at 3.0V.
Never assume OTP memory can be re-written; the PIC16LCE624-04I/P is one-time-programmable and rejected code commits will require a new part. Always validate firmware on a flash-based sibling (e.g. PIC16F628A-I/P) or an emulator before committing code to the OTP MCU. Also respect the absolute maximum VDD of 6.5V - the 'L' suffix guarantees only 5.5V normal operation, and exceeding the absolute max causes latch-up.
Keep the trace between the OSC1/OSC2 pins (16/15) and the crystal short (<10mm) and guard them with a ground pour to reduce EMI pickup. The MCLR/VPP pin (pin 4) must rise to VPP during ICSP programming; provide either a dedicated programming header or a 10k pull-up plus a manual reset button. Tie unused GPIO pins to defined logic levels (VDD or VSS) to minimize supply-current creep during SLEEP.
Compliance Information
RoHS and REACH compliance confirmed on Microchip product page. Not AEC-Q100 qualified - this part targets industrial and consumer markets, not automotive.
