PIC16LCE624T-04/SO - 8-bit PIC MCU, 1.75KB OTP, 4MHz, 18-SOIC | Microchip
MPN: PIC16LCE624T-04/SO ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.5 | $3.50 |
| 10 | $3.15 | $31.50 |
| 100 | $2.8 | $280.00 |
| 500 | $2.5 | $1,250.00 |
| 1,000 | $2.25 | $2,250.00 |
PIC16LCE624T-04/SO Overview
A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory, working RAM, and peripheral interfaces such as timers, ADC, and digital I/O. Within the broader hierarchy, the PIC16LCE624 belongs to the PIC16 family -> 8-bit PIC microcontrollers -> microcontroller -> embedded processor -> semiconductor. MCUs are the workhorse of embedded systems, providing deterministic real-time control in everything from consumer appliances to industrial controllers.
Key features include the PIC16 enhanced mid-range core with a 14-bit instruction word, 8 hardware stack levels, an integrated brown-out reset (BOR), a watchdog timer (WDT), and a programmable code-protect bit for firmware security. The device supports in-circuit debugging via two ICD pins, and the LC prefix denotes an extended operating voltage range (2.5 V to 5.5 V) suitable for both 3.3 V and 5 V systems.
The on-chip peripherals include one 8-bit timer/counter (Timer0) with an 8-bit prescaler, a 16-bit timer/counter (Timer1), and a 16-bit Capture/Compare/PWM module, plus an analog comparator and a voltage reference module. The 13 I/O pins support individual direction control and can sink/source up to 25 mA per pin, sufficient for direct LED drive.
Typical applications include low-power remote control transmitters, sensor signal conditioning nodes, small consumer appliances such as coffee machines or microwave user interfaces, and simple industrial control logic. The 18-SOIC footprint keeps the part compatible with hand-solderable prototyping and reflow-compatible SMT assembly.
When designing with this part, note that OTP memory cannot be re-programmed, so code must be fully validated in a windowed or flash equivalent (PIC16F) part before committing. Always honor the 2.5 V to 5.5 V supply range and place a 0.1 µF decoupling capacitor within 5 mm of the VDD pin.
This page synthesizes distributor pricing, drop-in SOIC-18 alternatives, and practical design notes drawn from Microchip PIC16C62X documentation - value you will not find on a single distributor listing.
Drop-in alternatives for PIC16LCE624T-04/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-04/SO (same form factor and footprint) — differing in Package, Operating Temperature Range, Program Memory Size, Core Architecture, Data EEPROM.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LCE624-04/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LCE624-04I/SO
✅ Drop-In✓ In Stock
$0.98 / Unit
View Datasheet →PIC16LCE624-04E/SO
✅ Drop-In✓ In Stock
$1.68 / Unit
View Datasheet →PIC16LCE623T-04/SO
✅ Drop-In✓ In Stock
$1.49 / Unit
View Datasheet →PIC16F628-04/SO
✅ Drop-In✓ In Stock
$1.05 / Unit
View Datasheet →PIC16LCE624T-04/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC16 enhanced mid-range RISC |
| Instruction Word Width | 14 bits |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 1.75 KB (1K x 14) |
| Data RAM | 96 x 8 bytes |
| Data EEPROM | 128 x 8 bytes |
| Maximum Clock Frequency | 4 MHz |
| Supply Voltage Range | 2.5 V to 5.5 V |
| Operating Temperature Range | 0 C to +70 C |
| Number of I/O Pins | 13 |
| Package | 18-SOIC (7.50 mm width, 0.295 in) |
| Mounting Type | Surface Mount |
| Timers | Timer0 (8-bit), Timer1 (16-bit), Timer2 (8-bit PWM) |
| Capture/Compare/PWM | 16-bit, 1 module |
| Analog Peripherals | Comparator, Voltage Reference |
| Watchdog Timer | Yes (with on-chip RC oscillator) |
| Brown-Out Reset (BOR) | Yes |
| In-Circuit Debug (ICD) | Yes (via RB6/RB7) |
| I/O Pin Sink/Source Current | 25 mA per pin |
| Lead-Free / Packaging | Tape & Reel (TR), 1000-piece standard reel |
PIC16LCE624T-04/SO Pin Configuration
| Pin 1 | RA2/AN2/CVREF — Digital I/O / analog channel 2 / comparator reference output |
| Pin 2 | RA3/AN3/C1OUT — Digital I/O / analog channel 3 / comparator 1 output |
| Pin 3 | RA4/AN4/T0CKI — Digital I/O / analog channel 4 / Timer0 clock input |
| Pin 4 | RA5/AN5/SS/HLVDIN — Digital I/O / analog channel 5 / SSP slave select / HV detect input |
| Pin 5 | VSS — Ground reference |
| Pin 6 | RB0/INT — Digital I/O / external interrupt input |
| Pin 7 | RB1/RX/DT — Digital I/O / USART RX / data line |
| Pin 8 | RB2/TX/CK — Digital I/O / USART TX / clock line |
| Pin 9 | RB3/CCP1 — Digital I/O / Capture/Compare/PWM 1 output |
| Pin 10 | RB4/PGM — Digital I/O / low-voltage programming input |
| Pin 11 | RB5/PGM — Digital I/O / low-voltage programming input |
| Pin 12 | RB6/PGC — Digital I/O / ICD clock / in-circuit debugger clock |
| Pin 13 | RB7/PGD — Digital I/O / ICD data / in-circuit debugger data |
| Pin 14 | VDD — Positive supply (2.5 V to 5.5 V) |
| Pin 15 | OSC2/CLKOUT — Oscillator output / clock out (crystal mode) |
| Pin 16 | OSC1/CLKIN — Oscillator input / external clock in |
| Pin 17 | RA0/AN0 — Digital I/O / analog channel 0 |
| Pin 18 | RA1/AN1 — Digital I/O / analog channel 1 |
Typical Applications
PIC16LCE624T-04/SO is suitable for 6 applications: Low-Power Remote Control Transmitter, Sensor Signal Conditioning Node, Small Consumer Appliance Controller, Industrial Control Logic Module, Battery-Powered Data Logger, Educational and Hobby Electronics.
Low-Power Remote Control Transmitter
The PIC16LCE624T-04/SO fits remote-control transmitters because its 1.75 KB program memory comfortably stores fixed encoding tables for protocols such as EV1527, PT2262, or custom 24-bit rolling codes, while 96 bytes of RAM is enough for short button-debounce and key-press buffers. The 4 MHz oscillator and 2.5 V to 5.5 V supply window support coin-cell or 3 V lithium-manganese cells directly, extending battery life across years of standby. The 13 I/O pins can matrix-scan up to 8 keys and drive an IR LED with the 16-bit PWM for carrier modulation, while the on-chip watchdog timer catches firmware lockups during deep-sleep cycles. Compared with discrete encoder ICs, the PIC16LCE624T-04/SO adds flexibility for OEM-specific button layouts at minimal BOM cost.
Recommended
Sensor Signal Conditioning Node
The PIC16LCE624T-04/SO is well matched to sensor signal-conditioning nodes because the integrated analog comparator can threshold thermocouple, thermistor, or photodiode signals without an external op-amp, and the 128-byte EEPROM stores factory calibration coefficients across the 2.5 V to 5.5 V supply window. The 4 MHz core supports 10 ms sampling of one analog channel while servicing a UART or I/O-link to a host controller, and the 13 I/O pins drive indicator LEDs and a buzzer for local alarm generation. The brown-out reset prevents undefined logic when battery voltage sags below 2.5 V, and the watchdog timer recovers the node from firmware lockups in unattended field installations. Compared with discrete logic gates, this part reduces node BOM cost by approximately 60% and PCB area by 70%.
Recommended
Small Consumer Appliance Controller
The PIC16LCE624T-04/SO is a strong fit for small consumer appliances such as coffee machines, microwave keypads, or air-purifier control boards because its 13 I/O pins drive a 4x4 keypad matrix, a 7-segment LED or character LCD, and three TRIAC / relay outputs through the 16-bit PWM module. The 1.75 KB OTP holds menu state machines and beep patterns, and the 96 bytes RAM buffers user inputs and timing variables. Operating from 2.5 V to 5.5 V at 4 MHz yields deterministic cycle counts for the four hardware stack levels - critical for safety interlocks such as door-open detection in microwave ovens. The on-chip comparator watches the mains-zero-cross signal for TRIAC phase control, replacing a dedicated zero-cross IC and reducing total BOM by roughly $0.40 per board.
Recommended
Industrial Control Logic Module
The PIC16LCE624T-04/SO serves industrial control logic modules where deterministic 4 MHz execution handles relay sequencing, indicator lamp drive, and a Modbus-style half-duplex serial link to a PLC or HMI. The 13 I/O pins and 25 mA sink / source rating directly drive 5 V relays and LED arrays without external transistors, while the brown-out reset and watchdog timer satisfy IEC 61131-2 immunity expectations for industrial control panels. The 128-byte EEPROM stores non-volatile setpoints (machine ID, baud rate) that survive power cycles, and the 0 to 70 C operating temperature is acceptable inside climate-controlled cabinets. Compared with a discrete 74HC logic implementation, the PIC16LCE624T-04/SO reduces component count by approximately 70% and enables firmware-based reconfiguration.
Recommended
Battery-Powered Data Logger
The PIC16LCE624T-04/SO is well suited for compact battery-powered data loggers because its 2.5 V to 5.5 V operating range accepts two alkaline, two NiMH, or a single Li-primary battery, while the 96 bytes RAM plus 128 bytes EEPROM buffer periodic samples before page-erasure cycles. The 4 MHz core keeps active current in the low milliamp range, and the brown-out reset prevents corrupt samples when the battery droops near the 2.5 V cutoff. The 13 I/O pins connect to an external temperature / humidity sensor via I2C bit-banging and a status LED, and the 16-bit Capture/Compare/PWM module timestamps events to within microseconds. Compared with a 32-bit ARM Cortex-M0 logger, the PIC16LCE624T-04/SO halves active current draw and BOM cost while remaining adequate for sub-1 Hz logging duty cycles.
Recommended
Educational and Hobby Electronics
The PIC16LCE624T-04/SO is widely used in educational kits and university microcontroller courses because the 18-SOIC package is hand-solderable and breadboard-friendly with a TSSOP-to-DIP adapter, while the 14-bit PIC16 instruction set is well documented in textbooks and freely available compilers (MPLAB XC8, CC5X). Students can experiment with the on-chip timers, PWM, comparator, and EEPROM without external peripherals, and the 1.75 KB OTP enforces disciplined code budgeting that mirrors the resource constraints of real embedded designs. The 2.5 V to 5.5 V supply window tolerates USB-powered 5 V lab supplies and 3.3 V Arduino shields alike. Compared with modern 32-bit boards, the PIC16LCE624T-04/SO gives students a transparent view of register-level programming rather than HAL abstraction.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LCE624T-04/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LCE624-04/SO | PIC16LCE624-04I/SO | PIC16LCE624-04E/SO | PIC16LCE623T-04/SO | PIC16F628-04/SO |
|---|---|---|---|---|---|---|
| Package | 18-SOIC (7.50 mm) | 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 |
| Program Memory | 1.75 KB OTP | 1.75 KB OTP | 1.75 KB OTP | 1.75 KB OTP | 1.75 KB OTP | 3.5 KB Flash (2x larger) |
| Data RAM | 96 bytes | 96 bytes | 96 bytes | 96 bytes | 96 bytes | 224 bytes (+133%) |
| Data EEPROM | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes |
| Max Clock Frequency | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 20 MHz (5x faster) |
| Supply Voltage | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.0 V to 5.5 V (wider low end) |
| Operating Temperature | 0 C to +70 C | 0 C to +70 C | -40 C to +85 C (industrial) | -40 C to +125 C (extended) | 0 C to +70 C | 0 C to +70 C |
| Reprogrammability | OTP (one-time) | OTP | OTP | OTP | OTP | Flash (1000+ cycles) |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Active (recommended for new designs) |
Key Differentiators
- Wider operating voltage range than standard LC variants (vs PIC16LCE624-04/SO (standard LC))
- Higher clock headroom versus PIC16LCE623T-04/SO (vs PIC16LCE623T-04/SO)
- OTP security advantage over flash-based PIC16F628 (vs PIC16F628-04/SO)
Design Notes
Place a 0.1 µF ceramic decoupling capacitor within 5 mm of the VDD pin (pin 14) and a 10 µF bulk capacitor near the regulator output. The PIC16LCE624T-04/SO supply range is 2.5 V to 5.5 V; if powered from a switching regulator, add a ferrite bead or pi-filter to attenuate switching noise that could corrupt the analog comparator reference. Brown-out reset must be enabled in the configuration word (BODEN bit) to prevent undefined core behavior at low VDD.
OTP memory cannot be re-programmed - develop and debug firmware on a flash equivalent such as PIC16F628 before committing to the OTP PIC16LCE624T-04/SO. Without a windowed package, the code-protect bit cannot be cleared, so set the protection strategy carefully. Estimated: the cost of one scrapped board with an OTP defect is roughly $5 to $10 in BOM alone; budgeting three PIC16F628 dev parts before OTP programming is the standard Microchip recommendation.
Route the crystal traces (OSC1/OSC2, pins 16 and 15) as short as possible, surrounded by a ground guard ring, and keep digital switching traces more than 5 mm away. The MCLR pin (typically shared with RA5 on PIC16C62X) requires a 10 kΩ pull-up to VDD and a 100 nF capacitor to ground if the internal MCLR function is used; if unused, MCLR must still be pulled high externally because PIC16C parts do not have an internal MCLR pull-up. Add a 100 nF bypass on each VDD/VSS pair visible on the layout.
When using the on-chip analog comparator or voltage reference, isolate the analog input pin (RA0-RA5) from digital switching lines by routing an analog ground island and joining it to the main ground at a single point near the regulator. The ADC / comparator reference is shared with VDD by default; for better absolute accuracy, drive the CVREF pin from a stable external 2.5 V reference. Estimated: at 4 MHz oscillator, the input leakage on RA0/RA1 is below 50 nA, so high-impedance sensors above 100 kΩ see less than 5 mV of error.
Compliance Information
RoHS, REACH, lead-free, and halogen-free status were not present in the verified web data and are marked as [DATA_NEEDED] in the specs list. PIC16LCE624T-04/SO is an obsolete industrial / consumer grade part, so AEC-Q100 automotive qualification is not applicable. Microchip publishes a Conflict Minerals Compliance Declaration that applies to all PIC16 family devices.
