PIC16LCE624T-04E/SS - 8-Bit 4MHz OTP MCU 1.75KB | Microchip
MPN: PIC16LCE624T-04E/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.85 | $3.85 |
| 10 | $3.47 | $34.70 |
| 100 | $3.05 | $305.00 |
| 500 | $2.74 | $1,370.00 |
| 1,000 | $2.45 | $2,450.00 |
PIC16LCE624T-04E/SS Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (program + data), and peripherals onto one silicon die. Within the broader semiconductor taxonomy, MCUs sit under microcontrollers -> embedded processors -> semiconductors. The PIC16C family in particular uses a RISC (Reduced Instruction Set Computer) architecture with a fixed 14-bit instruction width, distinguishing it from 8-bit CISC architectures such as the 8051. The "L" prefix denotes the low-voltage (2.5V to 5.5V) variant suitable for battery-powered designs, while the "CE" suffix indicates the integrated EEPROM data memory peripheral.
Key features include 13 programmable digital I/O pins, an external oscillator interface, integrated Brown-out Detect and Reset (BOR), Power-On Reset (POR), and Watchdog Timer (WDT) for safety-critical applications. The OTP program memory allows one-time field programming ideal for low-cost production runs, and the 35-instruction RISC set enables deterministic interrupt response within 200ns to 400ns depending on branch type. The industrial-grade -40C to +125C operating temperature range qualifies the device for harsh-environment deployments.
The PIC16LCE624 architecture uses a Harvard memory layout with separate program and data buses, eliminating fetch bottlenecks and enabling single-cycle execution of most instructions. The integrated EEPROM provides 1 million erase/write cycles endurance, suitable for parameter storage in field-deployed nodes. Brown-out detection protects against incorrect execution at marginal supply voltages during power transients.
Typical applications include low-power industrial sensor nodes, consumer appliance control boards, automotive body electronics sub-modules, and replacement designs for legacy PIC16C systems. The 20-SSOP package offers a compact 5.30mm body width suitable for high-density PCB layouts. Designers often pair it with the PICkit programmer for in-circuit serial programming (ICSP) during prototyping.
When designing with this part, ensure the VDD rail stays within 2.5V to 5.5V and respect the 4MHz maximum clock input. Brown-out detection should be enabled via the configuration bits to prevent code execution at sub-threshold voltages. The OTP memory cannot be reprogrammed - use the PIC16F624 (Flash-based) variant for development iteration.
This page synthesizes distributor pricing, parametric data, drop-in alternatives, and practical design notes not found on standard distributor listings, enabling faster engineering decisions for legacy PIC16C replacement designs.
Drop-in alternatives for PIC16LCE624T-04E/SS — 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/SS (same form factor and footprint) — differing in Package, Core Architecture, I/O Pins, Instruction Set, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LCE624-04I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LCE624-04/SS
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.85 / Unit
View Datasheet →PIC16LCE623-04E/SS
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$2.18 / Unit
View Datasheet →PIC16LCE625-04E/SS
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$2.63 / Unit
View Datasheet →PIC16F624-I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F1827T-I/SS
✅ Drop-In✓ In Stock
$0.95 / Unit
View Datasheet →PIC16LCE624T-04E/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit RISC (PIC16C family) |
| Program Memory Size | 1.75 KB (1K x 14) OTP |
| RAM Size | 96 x 8 (96 bytes) |
| EEPROM Data Memory | 128 x 8 (128 bytes) |
| Maximum Clock Speed | 4 MHz |
| Instruction Cycle Time | 200 ns (single-cycle) |
| Supply Voltage Range | 2.5 V to 5.5 V |
| Number of I/O Pins | 13 |
| Oscillator Type | External |
| Package / Case | 20-SSOP |
| Operating Temperature Range | -40 C to +125 C |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel |
| Integrated Peripherals | Brown-out Detect/Reset, POR, WDT |
| Instruction Set | 35 instructions, single-cycle except branches |
| RoHS Status | Compliant |
PIC16LCE624T-04E/SS Pin Configuration
| Pin 1 | RA0 — Bidirectional I/O port A bit 0 |
| Pin 2 | RA1 — Bidirectional I/O port A bit 1 |
| Pin 3 | RA2 — Bidirectional I/O port A bit 2 |
| Pin 4 | RA3 — Bidirectional I/O port A bit 3 |
| Pin 5 | RA4/T0CKI — Bidirectional I/O port A bit 4 / Timer0 clock input (open-drain) |
| Pin 6 | RA5 — Bidirectional I/O port A bit 5 |
| Pin 7 | RB0/INT — Bidirectional I/O port B bit 0 / External interrupt input |
| Pin 8 | RB1 — Bidirectional I/O port B bit 1 |
| Pin 9 | RB2 — Bidirectional I/O port B bit 2 |
| Pin 10 | RB3 — Bidirectional I/O port B bit 3 |
| Pin 11 | RB4 — Bidirectional I/O port B bit 4 |
| Pin 12 | RB5 — Bidirectional I/O port B bit 5 |
| Pin 13 | RB6/PGC — Bidirectional I/O port B bit 6 / In-circuit debugger clock |
| Pin 14 | RB7/PGD — Bidirectional I/O port B bit 7 / In-circuit debugger data |
| Pin 15 | VSS — Ground reference |
| Pin 16 | VDD — Positive supply voltage (2.5V to 5.5V) |
| Pin 17 | OSC2/CLKOUT — Oscillator crystal connection / clock output |
| Pin 18 | OSC1/CLKIN — Oscillator crystal connection / external clock input |
| Pin 19 | MCLR/VPP — Master Clear reset input / programming voltage input |
| Pin 20 | NC — Not connected (per datasheet) |
Typical Applications
PIC16LCE624T-04E/SS is suitable for 6 applications: Low-Power Industrial Sensor Nodes, Consumer Appliance Control Boards, Automotive Body Electronics Sub-Modules, Legacy PIC16C System Replacement, Battery-Powered Remote Control Units, Smart Meter and Energy Monitoring.
Low-Power Industrial Sensor Nodes
The PIC16LCE624T-04E/SS's 2.5V to 5.5V operating range and Extended -40C to +125C temperature grade suit industrial sensor nodes requiring low quiescent current. Its 13 programmable I/O pins interface directly to digital sensors, while the integrated EEPROM stores calibration coefficients and node identifiers. The 4MHz clock delivers 200ns instruction cycles, fast enough for sub-millisecond sensor polling in Modbus RTU slave implementations. Pair with an RS-485 transceiver and 4-20mA loop interface for field-deployed process instrumentation.
Recommended
Consumer Appliance Control Boards
The PIC16LCE624T-04E/SS is commonly deployed in white goods control boards (washing machines, dishwashers, microwave ovens) where 1.75KB OTP memory holds the appliance state machine. Its 13 I/O pins drive relay coils, read user buttons, and interface to LED or 7-segment displays. The integrated Watchdog Timer and Brown-out Reset prevent code lockups in electrically noisy motor drive environments. The 20-SSOP package fits compact appliance control PCBs and the Extended temperature grade tolerates elevated ambient temperatures near motors.
Recommended
Automotive Body Electronics Sub-Modules
The PIC16LCE624T-04E/SS Extended temperature grade and OTP memory make it suitable for non-safety automotive body modules like interior lighting controllers, seat position memory, and HVAC damper actuators. Its 2.5V to 5.5V range tolerates 12V battery cranking transients when paired with a 5V regulator. The 13 I/O pins interface to LIN bus transceivers, H-bridge drivers, and switch panels. Note: this part is not AEC-Q100 qualified; for certified automotive designs, use PIC16F15344T-I/SS or PIC16F1827T-I/SS instead.
Recommended
Legacy PIC16C System Replacement
The PIC16LCE624T-04E/SS provides modern low-voltage compatibility for legacy designs that originally specified the 3.0V to 6.0V PIC16C624. Its 1.75KB OTP memory and 96-byte RAM match the original PIC16C624 resource profile, allowing firmware recompilation without code restructuring. The 20-SSOP package is pin-compatible with older PIC16C624 SOIC designs when using the SSOP adapter footprint. The 4MHz clock preserves the original instruction timing for systems with cycle-accurate timing loops.
Recommended
Battery-Powered Remote Control Units
The PIC16LCE624T-04E/SS's 2.5V minimum supply voltage extends battery life in 3V lithium-cell-powered remote controls for garage doors, gate openers, and industrial key fobs. The 4MHz oscillator supports encrypted rolling-code protocols with deterministic 200ns instruction timing. The 13 I/O pins drive RF transmitter modules, read button matrices, and interface to piezo buzzers. Brown-out Reset protects against code corruption when the battery voltage sags below threshold during transmit bursts.
Recommended
Smart Meter and Energy Monitoring
The PIC16LCE624T-04E/SS fits compact energy metering sub-modules where 1.75KB OTP memory stores calibration data, communication stacks, and tamper-detection routines. Its 96-byte RAM accommodates Modbus or DLMS/COSEM protocol buffers for residential smart meter communication. The Extended -40C to +125C temperature range tolerates outdoor meter enclosure thermal cycling. Brown-out detection protects metrology accuracy during grid power disturbances, and the Watchdog Timer recovers from firmware hangs in unattended deployments.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LCE624T-04E/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LCE624-04I/SS | PIC16LCE624-04/SS | PIC16LCE623-04E/SS | PIC16F624-I/SS |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-SSOP | 20-SSOP - same | 20-SSOP - same | 20-SSOP - same | 20-SSOP - same |
| Program Memory | 1.75 KB OTP | 1.75 KB OTP | 1.75 KB OTP | 0.875 KB OTP | 1.75 KB Flash |
| Maximum Clock Speed | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 20 MHz |
| 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 | 2.0 V to 5.5 V |
| Temperature Grade | Extended -40C to +125C | Industrial -40C to +85C | Industrial -40C to +85C | Extended -40C to +125C | Industrial -40C to +85C |
| Memory Type | OTP (one-time programmable) | OTP | OTP | OTP | Flash (reprogrammable) |
| Packaging Format | Tape & Reel | Tube | Tube | Tube/Tape & Reel | Tube/Tape & Reel |
Key Differentiators
- Extended temperature grade -40C to +125C in Tape & Reel packaging (vs PIC16LCE624-04I/SS)
- Lower-voltage operation threshold at 2.5V (vs 3.0V standard PIC16C) (vs PIC16C624)
- Integrated EEPROM data memory vs external EEPROM requirement (vs PIC16F84A)
Design Notes
The PIC16LCE624T-04E/SS operates from 2.5V to 5.5V with Brown-out Reset (BOR) configurable via CONFIG bits. Place a 100nF decoupling capacitor as close as possible to the VDD pin (pin 16) and a 10uF bulk capacitor on the supply rail. For battery-powered designs, enable BOR at the lowest threshold (~2.5V) to prevent code corruption when the battery sags during transmit bursts. The integrated Power-On Reset (POR) holds the device in reset until VDD reaches a stable threshold, eliminating the need for an external reset IC in most applications.
OTP memory cannot be erased or rewritten - any firmware bug requires a new chip. For development, use the PIC16F624-I/SS Flash variant with the PICkit 3 programmer to iterate, then transition to the PIC16LCE624T-04E/SS for production. The MCLR pin (pin 19) must be pulled high through a 10k resistor; leaving it floating causes random resets. The RA4 pin (pin 5) is open-drain and requires an external pull-up resistor when used as a digital output.
Keep the crystal or external clock traces to pins 17 and 18 short (under 10mm) and surround them with a ground guard ring to minimize EMI pickup. Place decoupling capacitors within 3mm of the VDD pin with direct vias to the ground plane. The ICSP pins RB6/PGC (pin 13) and RB7/PGD (pin 14) should be accessible for in-circuit programming without removing components from the PCB. Avoid routing high-frequency signals (above 50MHz) near the oscillator pins to prevent clock jitter.
At 4MHz clock and 5.5V supply, the PIC16LCE624T-04E/SS draws approximately 2mA active current and 1uA sleep current. Estimated: junction-to-ambient thermal resistance (theta_JA) for the 20-SSOP package is approximately 90 C/W on a 1oz copper 4-layer board. At maximum 2mA active dissipation, the junction temperature rise is negligible (less than 1C above ambient). The Extended -40C to +125C operating range is suitable for outdoor industrial enclosures without additional thermal management.
Compliance Information
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified - migrate to PIC16F15344T-I/SS or PIC16F1827T-I/SS for AEC-Q100 automotive designs.
