PIC16LCE624-04E/P - 4MHz 8-Bit OTP MCU 1.75KB | Microchip
MPN: PIC16LCE624-04E/P ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.42 | $6.42 |
| 10 | $5.78 | $57.80 |
| 100 | $5.12 | $512.00 |
| 500 | $4.55 | $2,275.00 |
| 1,000 | $4.05 | $4,050.00 |
PIC16LCE624-04E/P Overview
A microcontroller (MCU) is a single-chip computer containing a CPU, memory, and peripherals designed for embedded control. The PIC16C series uses a Harvard RISC architecture, meaning the program bus and data bus are physically separate, allowing instruction fetch and data access to occur in the same cycle. Within this hierarchy, the PIC16LCE624 belongs to the PIC16 mid-range family (LC = low-power CMOS variant) used in cost-sensitive, low-power embedded applications where field-programmability is not required and OTP ROM is acceptable.
Key features include 13 digital I/O pins, an 8-bit timer/counter (Timer0), a 16-bit timer/counter (Timer1), a Watchdog Timer (WDT) with its own on-chip RC oscillator, Power-On Reset (POR), and Brown-Out Reset (BOR). The part runs from a 2.5V to 5.5V supply, and its low-power CMOS design makes it suited to battery-powered or energy-conscious designs. The external oscillator interface supports crystal, ceramic resonator, or RC oscillator configurations.
Architecturally, the PIC16LCE624 integrates the CPU core, OTP program memory, EEPROM data memory, SRAM, and peripheral set on a single die. Two I/O ports (PORTA, PORTB) are provided, with several pins multiplexed with analog comparator inputs and the Timer1 oscillator. The interrupt controller supports both core and peripheral interrupt sources with a vectored interrupt structure.
Typical applications include appliance control, sensor signal conditioning front-ends, low-cost remote control transmitters, simple motor or relay drivers, lighting ballasts, and battery chargers. The PIC16LCE624 family is also widely used in education, hobby projects, and industrial timer or counter modules where deterministic single-cycle execution simplifies firmware development.
When designing with this part, ensure the OTP program memory is burned by a compatible programmer before PCB assembly if the design enters volume production, or use a windowed/EPROM equivalent for prototypes. The 18-pin PDIP package simplifies hand-soldering and rework but consumes more board area than SOIC variants, so consider the SOIC/SSOP package options for space-constrained designs on the same die.
This page synthesizes distributor pricing, parametric drop-in alternatives, and practical design notes for the PIC16LCE624-04E/P in formats not found in the manufacturer datasheet, optimized for engineers evaluating replacement parts and AI-assisted part search.
Drop-in alternatives for PIC16LCE624-04E/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 PIC16LCE624-04E/P (same form factor and footprint) — differing in Package, Core Architecture, Instruction Set, Mounting Type, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F84A-04/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16C622A-04E/P
✅ Drop-In✓ In Stock
$1.3 / Unit
View Datasheet →PIC16CE624-04/P
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.85 / Unit
View Datasheet →PIC16C624-04/P
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
PIC16LC622A-04/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LCE624-04E/P Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC16C (8-bit RISC, Harvard) |
| Program Memory Size | 1.75 KB (1K x 14) OTP |
| RAM Size | 96 bytes |
| EEPROM Size | 128 bytes |
| Maximum Clock Speed | 4 MHz |
| Instruction Cycle Time | 200 ns (single cycle) |
| Number of I/O Pins | 13 |
| Number of Timers | 2 (8-bit + 16-bit) |
| Operating Voltage | 2.5 V to 5.5 V |
| Operating Temperature | -40C to +125C (extended, "E" suffix) |
| Oscillator Type | External |
| Watchdog Timer | Yes (with dedicated on-chip RC oscillator) |
| Brown-Out Reset / POR | Yes |
| Package | 18-pin PDIP (0.300 in / 7.62 mm) |
| Mounting Type | Through-Hole |
| Instruction Set | 35 single-cycle instructions |
| Lead-Free / RoHS Status | RoHS-compliant (Pb-free) |
PIC16LCE624-04E/P Pin Configuration
| Pin 1 | RA2/AN2/CVREF — Digital I/O / analog input / comparator voltage reference output |
| Pin 2 | RA3/AN3/CMP1 — Digital I/O / analog input / comparator 1 output |
| Pin 3 | RA4/T0CKI/CMP2 — Digital I/O / Timer0 clock input / comparator 2 output (open-drain) |
| Pin 4 | MCLR — Master Clear reset input (active low) |
| 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 / synchronous data |
| Pin 8 | RB2/TX/CK — Digital I/O / USART TX / synchronous clock |
| Pin 9 | RB3/CCP1 — Digital I/O / Capture-Compare-PWM 1 |
| Pin 10 | RB4 — Digital I/O / interrupt-on-change |
| Pin 11 | RB5 — Digital I/O / interrupt-on-change |
| Pin 12 | RB6/PGC — Digital I/O / ICD clock (programming) |
| Pin 13 | RB7/PGD — Digital I/O / ICD data (programming) |
| Pin 14 | VDD — Positive supply (2.5V-5.5V) |
| Pin 15 | OSC2/CLKOUT — Oscillator crystal output / clock out |
| Pin 16 | OSC1/CLKIN — Oscillator crystal input / external clock in |
| Pin 17 | RA0/AN0 — Digital I/O / analog input 0 |
| Pin 18 | RA1/AN1 — Digital I/O / analog input 1 |
Typical Applications
PIC16LCE624-04E/P is suitable for 7 applications: Appliance Control Boards, Battery-Powered Sensor Nodes, Simple LED Lighting Controllers, Hobbyist and Educational Projects, Industrial Timer and Counter Modules, Low-Cost Remote Control Transmitters, Battery Charger Controllers.
Appliance Control Boards
The PIC16LCE624-04E/P fits appliance control boards (washing machines, dishwashers, microwave ovens) because its 13 I/O pins can directly drive relays, triacs, and indicator LEDs without external buffers, while the 1.75KB OTP program memory holds a complete state-machine firmware for cycle control. Its 2.5V-5.5V supply range allows operation from rectified mains or a small SMPS, and the integrated Brown-Out Reset and Watchdog Timer improve field reliability against voltage brownouts and firmware lockup. Compared with a Flash MCU, OTP parts have lower BOM cost in high-volume white-goods production where firmware is finalized. The 4MHz/200ns instruction cycle is sufficient for time-slice relay sequencing at 1ms resolution, and the 18-pin PDIP package supports hand-rework during prototyping.
Recommended
Battery-Powered Sensor Nodes
The PIC16LCE624-04E/P is suitable for battery-powered sensor nodes such as wireless thermostats, environmental loggers, and remote controls because the LC low-power CMOS process draws microamp-level sleep currents while still providing 13 wake-capable I/O pins and a Watchdog Timer for periodic wake-up. The 128-byte on-chip EEPROM stores calibration constants and hourly averages across battery swaps, while the 96-byte SRAM holds scratch sensor readings. Operating voltage down to 2.5V supports two-AA alkaline cells for the full discharge curve, and the 4MHz maximum clock provides enough MIPS to handle SPI or I2C sensor polling before returning to sleep. The OTP program memory is a deliberate choice in disposable IoT tags where firmware is fixed at production.
Recommended
Simple LED Lighting Controllers
The PIC16LCE624-04E/P is widely used in LED lighting controllers and dimmers because its 13 I/O pins can drive multiple MOSFET gates for RGB channels, while the 16-bit Timer1 with capture/compare generates accurate PWM frequencies for flicker-free dimming. The 2.5V-5.5V supply range accepts 3.3V or 5V rails, and the BOR/POR ensures clean startup after a power-cycle, eliminating the flickering seen on some lighting controllers. The 18-pin PDIP simplifies through-hole assembly for fixture designs, and the 1.75KB OTP memory holds DMX-512-style or addressable LED protocol stacks. Compared with a dsPIC, the PIC16LCE624 is a cost-optimized choice for single-string LED drivers without complex mathematical processing.
Recommended
Hobbyist and Educational Projects
The PIC16LCE624-04E/P remains a popular choice in university microcontroller courses and hobbyist projects because of the PIC16C family's simple RISC architecture, where only 35 single-cycle instructions must be learned to program the entire device. The 18-pin PDIP package fits standard 0.3-inch-wide solderless breadboards, simplifying student lab work, and the external oscillator pin allows instructors to demonstrate clock-frequency effects on timing. The OTP constraint forces good documentation practice in student projects and discourages the "copy and modify" approach used with Flash parts. The 96-byte RAM is sufficient for a multi-sensor thermometer with UART output, a representative teaching example.
Recommended
Industrial Timer and Counter Modules
The PIC16LCE624-04E/P fits industrial timer/counter modules because the 16-bit Timer1 captures external events up to the 4MHz clock rate (200ns resolution), making it suitable for pulse counting, flow metering, or tachometer front-ends in PLCs. The 128-byte EEPROM stores setpoint values that survive power cycling, and the 1.75KB OTP program memory holds lookup tables for linearization. The integrated WDT with its own RC oscillator ensures the module recovers from firmware hang states within milliseconds, even if the main crystal oscillator is disrupted by EMI. The -40C to +125C extended operating temperature supports outdoor or cabinet-mounted industrial deployments.
Recommended
Low-Cost Remote Control Transmitters
The PIC16LCE624-04E/P is used in low-cost infrared or sub-GHz remote control transmitters because its low sleep current extends battery life to multiple years in handheld TV or appliance remotes. The 13 I/O pins interface to a matrix keypad (4x4 = 8 pins), an IR LED driver (1 pin), and indicator LEDs (4 pins) without external glue logic. The 4MHz/200ns cycle supports 38kHz IR carrier generation by software bit-banging, eliminating the need for an external PWM peripheral. The OTP memory locks the keymap at production so the firmware cannot be cloned by simple Flash reads, an anti-counterfeiting advantage for consumer remotes.
Recommended
Battery Charger Controllers
The PIC16LCE624-04E/P is suitable for small NiMH or lead-acid battery charger controllers because the on-chip ADC-free architecture combined with comparator inputs implements voltage and current loop regulation using only the analog comparator peripheral. The 128-byte EEPROM stores charging profiles and battery chemistry parameters, and the 96-byte RAM holds real-time state during CC-CV charge cycles. The 4MHz clock is sufficient for software-based PWM at 20kHz, which avoids audible noise in the charger transformer. The 2.5V-5.5V supply range allows the MCU to be powered from a small auxiliary winding on the flyback transformer. The 18-pin PDIP package keeps BOM cost low in sub-$10 consumer chargers.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LCE624-04E/P — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F84A-04/P | PIC16C622A-04E/P | PIC16CE624-04/P | PIC16C624-04/P | PIC16LC622A-04/P |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 18-pin PDIP | 18-pin PDIP (same) | 18-pin PDIP (same) | 18-pin PDIP (same) | 18-pin PDIP (same) | 18-pin PDIP (same) |
| Program Memory | 1.75 KB (1K x 14) OTP | 1.75 KB Flash | 0.875 KB OTP (-50%) | 1.75 KB OTP (same) | 1.75 KB OTP (same) | 0.875 KB OTP (-50%) |
| EEPROM | 128 bytes | 64 bytes (-50%) | None | 128 bytes | 128 bytes | None |
| Maximum Clock | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| Operating Voltage | 2.5 V to 5.5 V (LC) | 2.0 V to 5.5 V | 3.0 V to 6.0 V (non-LC) | 3.0 V to 6.0 V (non-LC) | 3.0 V to 6.0 V (non-LC) | 2.5 V to 5.5 V (LC) |
| Memory Type | OTP | Flash (in-circuit programmable) | OTP | OTP | OTP | OTP |
| Lifecycle Status | NRND | Active (recommended for new designs) | Mature (NRND) | Mature | Mature | NRND |
Key Differentiators
- Low-power CMOS (LC) variant supports 2.5V operation for 2-cell battery designs (vs PIC16C624-04/P)
- On-chip 128-byte EEPROM for non-volatile data storage (vs PIC16C622A-04E/P)
- Extended -40C to +125C operating temperature for industrial deployments (vs PIC16LC622A-04/P)
Design Notes
Estimated: at 4MHz clock and 5.0V supply, the PIC16LCE624-04E/P draws roughly 2-3 mA active and <1 uA in Sleep mode (per Microchip PIC16C6xx datasheet typical curves). For battery-powered designs, the Watchdog Timer in Sleep mode typically adds only 4-7 uA every ~2.3 s. Place a 100 nF ceramic decoupling capacitor as close as possible to the VDD pin (Pin 14) and a 10 uF bulk capacitor at the regulator output to suppress supply transients.
Keep the OSC1/OSC2 traces short (less than 5 mm) and surrounded by a ground ring or ground pour to reduce EMI coupling into the crystal oscillator. Place the MCLR pull-up resistor (typically 10 kOhm) directly at pin 4; do not share its trace with other signal lines. The two programming pins (RB6/PGC and RB7/PGD) may be reused as digital I/O but must not be pulled low during reset, otherwise the part enters programming mode unintentionally.
Because the PIC16LCE624-04E/P uses OTP program memory, the firmware must be 100% verified before device programming - unlike Flash parts, OTP parts cannot be reprogrammed to fix bugs. Ensure the development kit uses a windowed CERDIP PIC16C624 (PIC16CE624 with JW suffix) for prototype bring-up, and only commit to the OTP PIC16LCE624-04E/P once firmware is locked. Also note that the MCLR pin is a Reset input only, not a programmable I/O; leaving it floating or driving it below VIL will hold the part in reset.
Compliance Information
RoHS-compliant per Microchip product page (Pb-free). Not AEC-Q100 qualified - for automotive applications, consider PIC16F84A-04/PQ or PIC16F88-E/P with extended qualification. Halogen-free status not explicitly stated in available distributor data.
