PIC16LCE623-04/P - 8-bit MCU, 896B OTP, 4MHz, 18-DIP | Microchip
MPN: PIC16LCE623-04/P ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.13 | $2.13 |
| 10 | $1.95 | $19.50 |
| 100 | $1.78 | $178.00 |
| 500 | $1.61 | $805.00 |
| 1,000 | $1.45 | $1,450.00 |
PIC16LCE623-04/P Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and peripheral I/O into one package. Within the broader product hierarchy, the PIC16LCE623 belongs to the 8-bit microcontroller category, which itself sits under the microcontrollers segment of integrated circuits (ICs). The PIC16C/PIC16LC architecture uses a RISC-style instruction set with only 35 single-word instructions and an 8-level hardware stack, enabling deterministic real-time control in cost-sensitive embedded designs.
Key features include the PIC16 mid-range 14-bit instruction word, 200 ns instruction cycle time at 4 MHz, an external oscillator interface, an integrated 8-bit timer/counter with optional prescaler, and a programmable watchdog timer. The "LCE" family designation indicates the low-power, OTP-programmable, extended-temperature variant, optimized for battery-powered and industrial environments where field-programmability and low quiescent current are valuable.
The PIC16LCE623-04/P uses the Enhanced Mid-Range Harvard architecture with separate program and data buses, allowing instruction fetch and operand access in a single cycle. The 4 MHz maximum clock and 13 I/O make it a fit for simple sensing, control, and user-interface tasks. Designers should note that OTP parts are one-time programmable only and cannot be re-programmed in-circuit, which is a deliberate trade-off for low unit cost.
Typical applications include appliance control, sensor signal conditioning, low-speed serial communication bridges, and battery-powered instruments. The wide 2.5 V to 5.5 V operating range allows direct connection to single-cell Li-ion or two-AA battery stacks, eliminating boost converters in simple nodes.
When designing with this device, route the MCLR/VPP reset line and the two-decimal decouple VDD/VSS pair as close to the package pins as possible. Verify that any OTP programmer you select supports the PIC16LC6xx device ID 0x1060 before laying out the prototype.
This page synthesizes distributor pricing, pin-compatible alternatives from Microchip's PIC16LC family, and practical design notes not collected in any single manufacturer datasheet or distributor listing.
Drop-in alternatives for PIC16LCE623-04/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 PIC16LCE623-04/P (same form factor and footprint) — differing in Program Memory Size, Program Memory Type, Core Architecture, Operating Temperature Range, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F630-I/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LC622A-04I/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LC621-04/P
✅ Drop-In✓ In Stock
$1.65 / Unit
View Datasheet →PIC16LC620A-04/P
✅ Drop-In✓ In Stock
$1.3 / Unit
View Datasheet →PIC16LC711-04/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LC715-04/P
✅ Drop-In✓ In Stock
$1.57 / Unit
View Datasheet →PIC16LC66-04/SO
✅ Drop-In✓ In Stock
$2.4 / Unit
View Datasheet →PIC16LC73A-04I/SO
✅ Drop-In✓ In Stock
$4.19 / Unit
View Datasheet →PIC16LCE623-04/P Maximum Ratings & Electrical Characteristics
| Program Memory Size | 896 B (512 x 14) OTP |
| Data RAM Size | 96 B |
| Number of I/O Pins | 13 |
| CPU Core | PIC16C / Enhanced Mid-Range 8-bit |
| Instruction Set Size | 35 instructions (14-bit word) |
| Maximum Clock Frequency | 4 MHz |
| Instruction Cycle Time | 200 ns at 4 MHz |
| Supply Voltage (Vdd) | 2.5 V to 5.5 V |
| Operating Temperature | -40 C to +125 C (extended) |
| Oscillator Type | External |
| Timers | 1 x 8-bit Timer0 with prescaler |
| Watchdog Timer | Yes (software-enabled) |
| Package | 18-pin PDIP (0.300 in, 7.62 mm) |
| Mounting Type | Through-hole |
| MSL Level | 1 (unlimited) |
| Lead Free / RoHS | Contains lead (SnPb finish); non-RoHS by default |
| ROM Type | OTP (One-Time Programmable) |
PIC16LCE623-04/P Pin Configuration
| Pin 1 | RA2 — Digital I/O port A bit 2 |
| Pin 2 | RA3 — Digital I/O port A bit 3 |
| Pin 3 | RA4/T0CKI — Digital I/O port A bit 4 / Timer0 clock input |
| Pin 4 | MCLR/VPP — Master clear reset / programming voltage input |
| Pin 5 | VSS — Ground reference |
| Pin 6 | RB0/INT — Digital I/O port B bit 0 / external interrupt |
| Pin 7 | RB1 — Digital I/O port B bit 1 |
| Pin 8 | RB2 — Digital I/O port B bit 2 |
| Pin 9 | RB3 — Digital I/O port B bit 3 |
| Pin 10 | RB4 — Digital I/O port B bit 4 |
| Pin 11 | RB5 — Digital I/O port B bit 5 |
| Pin 12 | RB6 — Digital I/O port B bit 6 |
| Pin 13 | RB7 — Digital I/O port B bit 7 |
| Pin 14 | VDD — Positive supply voltage (2.5 V to 5.5 V) |
| Pin 15 | OSC2/CLKOUT — Oscillator output / clock-out |
| Pin 16 | OSC1/CLKIN — Oscillator input / external clock input |
| Pin 17 | RA0 — Digital I/O port A bit 0 |
| Pin 18 | RA1 — Digital I/O port A bit 1 |
Typical Applications
PIC16LCE623-04/P is suitable for 7 applications: Appliance Control Boards, Sensor Signal Conditioning Nodes, Battery-Powered Handheld Instruments, Low-Speed Serial Communication Bridges, User Interface / LED Driver Boards, Automotive Body Electronics (Non-Safety), Industrial Control Modules.
Appliance Control Boards
The PIC16LCE623-04/P suits white-goods and small-appliance control boards thanks to its 2.5 V to 5.5 V wide supply range and 13 digital I/O pins. With 4 MHz operation and 200 ns instruction cycles, it can scan keypads, drive relays, and sequence triac-style loads directly while its 96-byte RAM is sufficient for state-machine logic and EEPROM emulation. The Extended temperature range (-40 C to +125 C) lets it survive compressor enclosures and oven cavities. Designers typically pair it with an MOC3021 optoisolator and a zero-cross triac for safe AC switching, and route the MCLR/VPP line to a manual reset button for service. The OTP memory model keeps unit cost low while preventing firmware reverse engineering.
Recommended
Sensor Signal Conditioning Nodes
The PIC16LCE623-04/P fits battery-powered sensor nodes where 2.5 V operation from a single-cell Li-ion or two-AA stack is mandatory. Its 13 I/O can scan multiple analog channels via an external multiplexer, while the Enhanced Mid-Range 14-bit instruction word simplifies linearization math. The 4 MHz clock and low-power design reduce average current draw versus 20 MHz PIC16F parts, extending battery life in remote wireless or LoRa-attached nodes. The 96-byte RAM is adequate for sensor calibration tables stored as constants in OTP. Designers usually pair this MCU with a precision op-amp like MCP6002 for gain stages and route the sensor power through a P-MOSFET gate controlled by an MCU I/O pin to enable duty-cycled sampling.
Recommended
Battery-Powered Handheld Instruments
The PIC16LCE623-04/P is well-matched to handheld battery instruments such as digital calipers, thermometers, and hobby multimeters, where its 2.5 V to 5.5 V operation lets the device run from two coin cells or AA batteries without a boost converter. The 4 MHz maximum clock is sufficient to debounce switches, drive a multiplexed LCD segment display, and execute firmware routines that read a thermistor or strain gauge. The Extended -40 C to +125 C temperature range ensures accurate readings outdoors and in refrigerated labs. With 13 I/O available, designers can allocate pins for keypad matrix scanning, buzzer PWM via Timer0, and an LCD bias generator. The OTP memory prevents firmware tampering in the field, and the 18-pin PDIP is easy to hand-solder for prototype runs.
Recommended
Low-Speed Serial Communication Bridges
The PIC16LCE623-04/P acts as a cost-effective protocol bridge between UART, I2C, and one-wire sensor peripherals in legacy industrial equipment. The PIC16C core's USART module (synchronous/asynchronous) plus GPIO bit-banging allow software implementation of RS-232, RS-485, Modbus, and Dallas 1-Wire master functions. With 4 MHz and 200 ns instruction cycles, the part easily handles 9600 baud with margin for protocol overhead. The 13 I/O are sufficient for a serial data line, a direction-control pin for RS-485 transceivers, and status LEDs. OTP memory protects the bridge firmware from inadvertent field updates while the 18-pin PDIP footprint fits inside compact DIN-rail enclosures.
Recommended
User Interface / LED Driver Boards
The PIC16LCE623-04/P drives LED status indicators, 7-segment displays, and keypads in industrial control panels. The 13 I/O pins map cleanly onto a 4x4 matrix keypad scanner (8 lines), plus three digit-select or LED-enable outputs, with two spare I/O for serial debug or buzzer PWM. The Enhanced Mid-Range core executes a full key-debounce and LED-multiplexing loop in well under 200 ns at 4 MHz, leaving bandwidth for housekeeping. The 96-byte RAM holds key buffers and debounce timers, and the OTP memory prevents accidental code change during deployment. With -40 C to +125 C operation, the part tolerates factory floor conditions behind control cabinet doors.
Recommended
Automotive Body Electronics (Non-Safety)
The PIC16LCE623-04/P is suitable for non-safety automotive body electronics such as interior lighting controllers, seat memory modules, and accessory timers. Its 4 MHz clock, 2.5 V to 5.5 V supply, and Extended -40 C to +125 C temperature rating handle under-dash environments. The 13 I/O are sufficient for switch inputs, PWM-driven lamps, and LIN bus emulation via a UART plus external transceiver. Designers typically add a TJA1027 LIN transceiver and route the MCU through a TVS diode for automotive transient protection. OTP memory locks the body-control firmware at production, ensuring the in-vehicle behavior cannot be reprogrammed in the field without a recall-grade service procedure.
Recommended
Industrial Control Modules
The PIC16LCE623-04/P fits compact industrial control modules such as timers, counters, and small PLC-style I/O expanders. Its Extended -40 C to +125 C range allows deployment in factory cabinets and on-machine enclosures, while the 4 MHz core and 200 ns instruction cycles execute ladder-style logic well within real-time budgets. The 13 I/O support 24 V-tolerant inputs via external resistor dividers and opto-isolated outputs through MOC3010-style drivers. The 96-byte RAM holds counter presets and runtime status. OTP firmware locks the control algorithm against unauthorized modifications in deployed equipment, and the 18-pin PDIP is mechanically rugged for vibration-prone installations.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LCE623-04/P — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F630-I/P | PIC16LC622A-04I/P | PIC16LC621-04/P | PIC16LC620A-04/P | PIC16LC711-04/P |
|---|---|---|---|---|---|---|
| Package | 18-pin PDIP | 18-pin PDIP - same | 18-pin PDIP - same | 18-pin PDIP - same | 18-pin PDIP - same | 18-pin PDIP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 896 B OTP (512 x 14) | 1024 words flash (2048 B) | 896 B OTP | 896 B OTP | 512 x 14 OTP | 896 B OTP/EPROM |
| RAM | 96 B | 128 B | 96 B | 96 B | 96 B | 68 B |
| Maximum Clock | 4 MHz | 20 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| Memory Type | OTP | Flash | OTP | OTP | OTP | OTP/EPROM |
| I/O Pins | 13 | 13 | 13 | 13 | 13 | 13 |
| ADC | None | None (comparator only) | None | None | None | 8-bit ADC |
Key Differentiators
- Wide 2.5 V to 5.5 V supply range for direct battery operation (vs PIC16F630-I/P)
- Extended temperature range for industrial deployments (vs PIC16F630-I/P (industrial -40 to +85 C))
- OTP memory for production cost reduction (vs PIC16F630-I/P (flash memory))
Design Notes
The PIC16LCE623-04/P operates from 2.5 V to 5.5 V; place a 100 nF decoupling capacitor within 5 mm of the VDD pin (14) and a 10 uF bulk capacitor at the regulator output. For battery-powered designs running below 4 MHz, disable unused peripherals via the CMCON and VRCON registers to keep quiescent current under 5 uA. Estimated: assuming a 3.0 V coin-cell source and a duty-cycled 1% active ratio, average current approaches 50 uA, giving multi-year battery life.
Route the MCLR/VPP pin (4) through a 10 kohm pull-up to VDD and keep its trace short to avoid spurious resets from EMI. Place the 4 MHz crystal or ceramic resonator within 10 mm of pins 15 and 16 (OSC2/CLKOUT, OSC1/CLKIN) and guard the oscillator traces with a ground pour. The 18-pin PDIP provides a 2.54 mm pin pitch that is convenient for prototype hand-soldering but is not suited to high-density production PCBs; consider migrating to the PIC16F630-I/P in SOIC for volume runs.
Do not assume the PIC16LCE623-04/P is in-circuit reprogrammable - it is OTP and any code change requires a new physical part. When designing in this OTP device, plan for a flash-based PIC16F630-I/P prototype companion for firmware iteration, then burn the OTP part only after firmware is locked. Per Microchip's programming manual, verify the device ID 0x1060 in your programmer software before issuing the bulk erase and program sequence, otherwise the wrong PIC16LC6xx variant can be corrupted.
The PIC16LCE623-04/P is rated for -40 C to +125 C operation, but at 4 MHz the CMOS core dissipates only a few milliwatts - typically under 50 mW - so no heatsink is required. The PDIP package's plastic body keeps junction-to-ambient thermal resistance around 70 C/W in still air. Estimated: at full 4 MHz clock and all I/O toggling, junction temperature rise above ambient is below 5 C, so a thermal copper pour on the PCB is more useful for mechanical stability than thermal relief.
The PIC16LCE623-04/P digital I/O is not 5 V tolerant when VDD is below 5 V; clamp inputs from external 5 V systems with a series resistor and a Schottky diode to VDD to avoid latch-up. The MCLR/VPP input should be debounced with a 100 nF capacitor to ground to suppress noise-induced resets on long cable harnesses. When driving long cables or relays, place a 100 ohm series resistor within 5 mm of the MCU pin to dampen transmission-line ringing.
Compliance Information
Per the verified distributor listing, the PIC16LCE623-04/P carries a SnPb finish and is non-RoHS by default. Designers requiring RoHS compliance should migrate to PIC16F630-I/P which is lead-free. AEC-Q100 qualification is not available for this part - use AEC-Q100 qualified PIC16F variants for automotive safety-critical applications.
