PIC16LCE624T-04I/SS - 4MHz 8-bit OTP MCU, 1.75KB Flash | Microchip
MPN: PIC16LCE624T-04I/SS ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.85 | $3.85 |
| 10 | $3.46 | $34.60 |
| 100 | $2.78 | $278.00 |
| 500 | $2.32 | $1,160.00 |
| 1,000 | $1.95 | $1,950.00 |
PIC16LCE624T-04I/SS Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (program + RAM + non-volatile data), and programmable I/O peripherals on one die. The PIC16CE62X family sits at the entry level of the PIC16 mid-range 8-bit architecture hierarchy (PIC10/12/16/18) and is commonly used for cost-sensitive control tasks where deterministic instruction execution and low BOM cost matter more than raw compute throughput. The "LC" prefix denotes a 3.0V-5.5V wide-range supply variant suitable for battery-backed designs.
Key features include Brown-out Detect/Reset (BOR), Power-On Reset (POR), and a Watchdog Timer (WDT) for reliable field operation. The 13 I/O pins share the SSOP-20 footprint used across the PIC16CE623/624/625 family, allowing simplified PCB reuse when memory size is the only design variable. The OTP program memory is one-time writeable, which means firmware is committed at production programming time and cannot be field-updated - a different cost profile from Flash-based PIC16F devices.
Architecturally, the PIC16LCE624 uses Microchip's 14-bit RISC instruction set with a Harvard-style separate program and data bus. The EEPROM data memory (128 bytes) supports byte-level in-application write/read for parameter storage. External oscillator configurations (XT, HS, LP, RC) are user-selectable via configuration bits, and the internal 4 MHz RC oscillator reduces external component count for cost-sensitive designs.
Typical applications include appliance control (white goods, HVAC actuators), low-end sensor signal conditioning, simple motor and relay drivers, automotive body electronics (non-safety subsystems), smart metering peripherals, and battery-powered remote controls. The wide VDD range supports both 3.3V and 5V logic domains, and the SSOP-20 package allows reflow soldering on standard SMT lines.
When designing with the PIC16LCE624, plan firmware versioning carefully: because the program memory is OTP, any firmware bug discovered after programming requires a new silicon lot. Maintain sufficient decoupling (100 nF + 10 µF) close to VDD/VSS and route the MCLR pin per Microchip application note guidelines to avoid spurious resets during in-circuit programming.
This page synthesizes verified distributor pricing as of 2026-09-22, drop-in replacement candidates in the same SSOP-20 footprint, and practical design notes for engineers sourcing the PIC16LCE624T-04I/SS for new designs or legacy board production.
Drop-in alternatives for PIC16LCE624T-04I/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-04I/SS (same form factor and footprint) — differing in Core Architecture, I/O Pins, Instruction Set, Package, Program Memory Size.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LCE624T-04E/SS
✅ Drop-In✓ In Stock
$2.45 / Unit
View Datasheet →PIC16LCE624-04I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LCE624-04/SS
✅ Drop-In✓ In Stock
$1.85 / Unit
View Datasheet →PIC16LCE624-04E/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LCE624T-04I/SS Maximum Ratings & Electrical Characteristics
| Core | PIC 8-bit RISC (mid-range, 14-bit instruction) |
| Family | PIC® 16C (PIC16CE62X sub-family) |
| Program Memory | 1.75 KB (1K x 14) OTP |
| RAM | 96 x 8 bytes |
| EEPROM Data Memory | 128 x 8 bytes |
| Maximum CPU Frequency | 4 MHz |
| Supply Voltage (VDD) | 3.0 V to 5.5 V (LC variant, wide range) |
| Operating Temperature | -40 °C to +85 °C (Industrial, "I" suffix) |
| I/O Pins | 13 programmable |
| Package | 20-pin SSOP (5.30 mm body width, 0.65 mm pitch) |
| Mounting Type | Surface Mount |
| Peripherals | Brown-out Reset, Power-On Reset, Watchdog Timer |
| Oscillator Options | External XT/HS/LP/RC + internal 4 MHz RC |
| MSL Level | 1 (unlimited floor life at <30 °C / 85% RH) |
| RoHS Status | Compliant |
PIC16LCE624T-04I/SS Pin Configuration
| Pin 1 | MCLR/VPP — Master Clear (reset) input / programming voltage input |
| Pin 2 | RA0/AN0 — Port A bit 0 / analog input 0 |
| Pin 3 | RA1/AN1 — Port A bit 1 / analog input 1 |
| Pin 4 | RA2/AN2 — Port A bit 2 / analog input 2 |
| Pin 5 | RA3/AN3 — Port A bit 3 / analog input 3 |
| Pin 6 | RA4/T0CKI — Port A bit 4 / Timer0 clock input |
| Pin 7 | RA5/SS/AN4 — Port A bit 5 / SPI slave select / analog input 4 |
| Pin 8 | VSS — Ground reference |
| Pin 9 | OSC1/CLKIN — Oscillator crystal input / external clock input |
| Pin 10 | OSC2/CLKOUT — Oscillator crystal output / clock output |
| Pin 11 | RC0/T1OSO/T1CKI — Port C bit 0 / Timer1 oscillator output / Timer1 clock input |
| Pin 12 | RC1 — Port C bit 1 |
| Pin 13 | RC2 — Port C bit 2 |
| Pin 14 | RC3 — Port C bit 3 |
| Pin 15 | RC4 — Port C bit 4 |
| Pin 16 | RC5 — Port C bit 5 |
| Pin 17 | RC6 — Port C bit 6 |
| Pin 18 | RC7 — Port C bit 7 |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VDD — Positive supply voltage (3.0 V - 5.5 V) |
Typical Applications
PIC16LCE624T-04I/SS is suitable for 7 applications: White Goods Appliance Control, HVAC Actuator and Thermostat Control, Low-End Sensor Signal Conditioning, Automotive Body Electronics (Non-Safety), Smart Metering Peripheral Module, Battery-Powered Remote Control, Industrial Relay and Indicator Driver.
White Goods Appliance Control
The PIC16LCE624T-04I/SS is well-suited for white goods appliance control boards such as washing machines, dishwashers, and microwave ovens. Its 1.75 KB OTP program memory holds typical appliance firmware (mode selection, timing, sensor polling) with room to spare, while the 13 I/O pins drive relays, triacs, and LED indicators directly via transistors. The integrated Brown-out Reset and Watchdog Timer protect against mains-borne brownouts and firmware lockups common in motor-start environments, and the 3.0-5.5 V VDD range accepts both 5 V and 3.3 V sensor supplies.
Recommended
HVAC Actuator and Thermostat Control
In HVAC actuator and thermostat designs, the PIC16LCE624T-04I/SS provides deterministic 8-bit control for valve drivers, fan speed relays, and temperature setpoint logic. The 96 bytes RAM is sufficient for 2-3 sensor input buffers and a small state machine, while the 128-byte EEPROM stores user preferences (setpoint, schedule) across power cycles. The wide VDD range (3.0-5.5 V) supports both battery-backed thermostats and 24 VAC-derived 5 V supplies via simple rectifier circuits.
Recommended
Low-End Sensor Signal Conditioning
The PIC16LCE624T-04I/SS serves as a low-cost front-end MCU for sensor modules where it digitizes analog signals via its own comparator peripherals and routes conditioned data to a host controller. The 4 MHz CPU is fast enough to handle 100 Hz-1 kHz sample rates for thermistor, photocell, and Hall-effect sensor conditioning, and the 128-byte EEPROM stores calibration coefficients per unit. The OTP program memory is ideal when the calibration algorithm is fixed and the unit ships pre-programmed - a typical pattern in industrial sensor transmitters.
Recommended
Automotive Body Electronics (Non-Safety)
The PIC16LCE624T-04I/SS can be deployed in non-safety automotive body electronics such as interior lighting controllers, seat position memory, mirror adjustment, and accessory timers. The industrial temperature grade handles under-dash environments (-40 °C to +85 °C), and the 13 I/O pins drive MOSFETs and small relays for body functions. Note that AEC-Q100 qualification is NOT held by this part, so it must be limited to non-safety subsystems per automotive OEM guidelines.
Recommended
Smart Metering Peripheral Module
The PIC16LCE624T-04I/SS fits well as a peripheral MCU in smart metering subsystems - handling display multiplexing, button debounce, tariff schedule storage, and optocoupler-isolated communication interfaces. Its 128-byte EEPROM stores metering parameters and tamper flags, while the 4 MHz CPU processes one task per interrupt cycle without scheduling overhead. The 3.0-5.5 V wide-range VDD is convenient for battery-backed metering designs where the main MCU operates at 3.3 V from a coin cell.
Recommended
Battery-Powered Remote Control
The PIC16LCE624T-04I/SS is a cost-effective controller for battery-powered remote controls (TV, fan, toy, RF key fob). At 3.0 V from two AA cells, the device runs at full 4 MHz with adequate headroom for IR or low-power RF transmitters. The OTP program memory locks the protocol firmware permanently, preventing field tampering, and the SSOP-20 package reflows cleanly on consumer SMT lines. The 13 I/O pins handle a 4x4 key matrix plus LED indicators.
Recommended
Industrial Relay and Indicator Driver
The PIC16LCE624T-04I/SS drives multi-channel relay and indicator panels in industrial control cabinets where deterministic I/O timing matters. The 13 I/O pins can each source or sink 25 mA to drive optocouplers, status LEDs, and small signal relays directly. With Brown-out Reset and Watchdog Timer built in, the MCU recovers automatically from supply transients caused by relay coil switching, and the OTP program memory ensures the control logic cannot be accidentally overwritten in the field.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LCE624T-04I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LCE624T-04E/SS | PIC16LCE624-04I/SS | PIC16LCE624-04/SS | PIC16LCE624-04E/SS | PIC16LCE624-04I/P |
|---|---|---|---|---|---|---|
| Package | SSOP-20 | SSOP-20 - same | SSOP-20 - same | SSOP-20 - same | SSOP-20 - same | PDIP-18 - different |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 1.75 KB (1K x 14) OTP | 1.75 KB (1K x 14) OTP | 1.75 KB (1K x 14) OTP | 1.75 KB (1K x 14) OTP | 1.75 KB (1K x 14) OTP | 1.75 KB (1K x 14) OTP |
| RAM | 96 bytes | 96 bytes | 96 bytes | 96 bytes | 96 bytes | 96 bytes |
| EEPROM | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes |
| CPU Frequency | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| Operating Temperature | -40°C to +85°C (Industrial) | -40°C to +125°C (Extended) | -40°C to +85°C (Industrial) | 0°C to +70°C (Commercial) | -40°C to +125°C (Extended) | -40°C to +85°C (Industrial) |
| I/O Pins | 13 | 13 | 13 | 13 | 13 | 13 |
Key Differentiators
- Same SSOP-20 footprint with extended temperature grade (vs PIC16LCE624T-04E/SS)
- Wide VDD range 3.0 V - 5.5 V (LC variant) (vs PIC16CE624 (standard 'C' variant))
- Built-in EEPROM data memory vs PIC16C62X without E suffix (vs PIC16C624 (non-CE family))
Design Notes
Place a 100 nF decoupling capacitor within 5 mm of the VDD pin (pin 20) and a bulk 10 µF tantalum or ceramic capacitor on the same VDD net. The PIC16CE62X family is sensitive to VDD ripple during EEPROM write cycles - if the bulk capacitor exceeds 5 cm trace length to VDD, add a second 100 nF at the bulk cap. Estimated: input ripple above 50 mVpk during EEPROM writes may cause write abort.
Route the MCLR/VPP pin (pin 1) directly to a programming header with a 10 kΩ pull-up to VDD and a 100 nF cap to ground for noise immunity. If using in-circuit serial programming (ICSP), keep the PGD/PGC traces short (under 50 mm) and avoid routing them parallel to switching signals. The ICSP connector footprint must support 5 V VPP for high-voltage programming.
Do NOT confuse the PIC16LCE624 (OTP) with the PIC16F624 (Flash) - the F variant has different configuration bit defaults and peripheral register maps. Source code written for one will NOT assemble cleanly for the other without changes. Also note that the 'LC' wide-VDD variant (3.0-5.5 V) is distinct from the standard 'C' variant (4.5-5.5 V); verify your firmware's VDD-dependent timing calculations against the correct electrical characteristics table.
OSC1/OSC2 traces should be kept short (under 10 mm) and surrounded by a ground guard ring if using a crystal oscillator. For HS mode (>4 MHz) crystals, add 10-33 pF load capacitors per the crystal datasheet; do not assume the on-chip load capacitors are sufficient. RC oscillator mode (pin OSC1 driven by external RC network) requires careful choice of R and C to stay within the 4 MHz tolerance specification.
Compliance Information
RoHS compliant per Microchip product page; not AEC-Q100 qualified (industrial-grade only). For automotive applications use the PIC16F1827T-I/SS instead.
