PIC16LCE624-04/SS - 8-bit PIC MCU 1.75KB OTP 4MHz SSOP-20
MPN: PIC16LCE624-04/SS ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.63 | $2.63 |
| 10 | $2.4 | $24.00 |
| 100 | $2.18 | $218.00 |
| 500 | $1.99 | $995.00 |
| 1,000 | $1.85 | $1,850.00 |
PIC16LCE624-04/SS Overview
An 8-bit PIC microcontroller (MCU) is a compact, Harvard-architecture computing device built around an 8-bit data path, 14-bit instruction word, and integrated peripherals such as timers, comparators, and communication interfaces. Within the broader semiconductor hierarchy, MCUs sit between general-purpose microprocessors and ASICs: they embed CPU, memory, and I/O on a single die, enabling deterministic real-time control in embedded systems. The PIC16C family is one of Microchip's foundational mid-range MCU lines, predating the flash-based PIC16F series and offering OTP and ROM variants for high-volume, cost-sensitive products.
Key features of the PIC16LCE624-04/SS include an internal oscillator option, an integrated analog comparator, a capture/compare/PWM (CCP) module, a watchdog timer with its own on-chip RC oscillator, and in-circuit serial programming (ICSP) via two pins. The device's low-power "L" variant supports battery-friendly operation, and the "E" designation (not present on this part) would indicate the extended-temperature grade; this MPN is the commercial-temperature grade (0°C to +70°C). The SSOP-20 footprint enables compact PCB layouts while still providing sufficient I/O for typical sensor, switch, and indicator-control applications.
The PIC16LCE624-04/SS architecture uses a RISC instruction set with only 35 single-word instructions, simplifying code generation and easing firmware development. Its 14-bit instruction width delivers reasonable code density for the era's typical control loops, and the Harvard bus allows simultaneous instruction fetch and data access. Compared to flash-based successors, OTP memory requires a programmed device to be discarded and replaced if firmware changes are needed, which is acceptable in mature, high-volume production where code is finalized.
Typical applications include consumer appliance control (washing machines, microwave ovens, coffee makers), simple industrial timers and counters, remote-control transmitters, low-end security keypads, sensor interface boards, and LED display drivers. The combination of analog comparator, timer, and PWM resources enables direct motor-control or lighting-control loops without external glue logic.
When designing with this MCU, allocate the I/O budget carefully: 13 usable I/O pins must support all digital I/O plus any analog comparator or ICSP functions, which can reserve two additional pins during programming. The OTP memory constraint means firmware must be fully validated in development before committing to production programming, and an engineering stock of pre-programmed parts should be planned accordingly.
Drop-in alternatives for PIC16LCE624-04/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 PIC16LCE624-04/SS (same form factor and footprint) — differing in Package, Instruction Set, Program Memory Size, RAM Size, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LCE624-04I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LCE624T-04/SS
✅ Drop-In✓ In Stock
$2.15 / Unit
View Datasheet →PIC16LCE624-04E/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LCE624-04E/P
✅ Drop-In✓ In Stock
$4.05 / Unit
View Datasheet →PIC16F628-I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LCE623-04E/SS
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$2.18 / Unit
View Datasheet →PIC16LCE624-04/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 8-bit RISC |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 1.75 KB (1K x 14) |
| RAM | 96 bytes |
| EEPROM | 16 bytes (on-chip) |
| Maximum Clock Frequency | 4 MHz |
| I/O Pins | 13 |
| Supply Voltage (VDD) | 2.5 V to 5.5 V |
| Operating Temperature Range | 0 C to +70 C (Commercial) |
| Package | SSOP-20 (208 mil) |
| Mounting Type | Surface Mount |
| Timers | Yes (Timer0/Timer1/Timer2) |
| Analog Comparator | Yes (integrated) |
| CCP/PWM Module | Yes |
| Watchdog Timer | Yes (with dedicated on-chip RC) |
| In-Circuit Serial Programming (ICSP) | Yes |
| Instruction Set | 35 single-word instructions (14-bit wide) |
| RoHS Status | Compliant |
PIC16LCE624-04/SS Pin Configuration
| Pin 1 | RA2/AN2/VREF — Port A bit 2 / Analog input 2 / Voltage reference |
| Pin 2 | RA3/AN3/CMP1 — Port A bit 3 / Analog input 3 / Comparator 1 output |
| Pin 3 | RA4/T0CKI — Port A bit 4 / Timer0 clock input |
| Pin 4 | RA5/MCLR/THV — Port A bit 5 / Master Clear (reset) / Programming voltage |
| Pin 5 | VSS — Ground reference |
| Pin 6 | RB0/INT — Port B bit 0 / External interrupt input |
| Pin 7 | RB1 — Port B bit 1 (digital I/O) |
| Pin 8 | RB2 — Port B bit 2 (digital I/O) |
| Pin 9 | RB3/PGM — Port B bit 3 / Low-voltage programming input |
| Pin 10 | RB4 — Port B bit 4 (digital I/O) |
| Pin 11 | RB5 — Port B bit 5 (digital I/O) |
| Pin 12 | RB6/PGC — Port B bit 6 / ICSP clock input |
| Pin 13 | RB7/PGD — Port B bit 7 / ICSP data input/output |
| Pin 14 | VDD — Positive supply voltage (2.5 V to 5.5 V) |
| Pin 15 | OSC2/CLKOUT — Oscillator output / Clock output (Fosc/4) |
| Pin 16 | OSC1/CLKIN — Oscillator input / External clock input |
| Pin 17 | RC0 — Port C bit 0 (digital I/O) |
| Pin 18 | RC1 — Port C bit 1 (digital I/O) |
| Pin 19 | RC2/CCP1 — Port C bit 2 / Capture-Compare-PWM 1 output |
| Pin 20 | RC3 — Port C bit 3 (digital I/O) |
Typical Applications
PIC16LCE624-04/SS is suitable for 6 applications: Consumer Appliance Control, Remote Control Transmitters, Industrial Timer and Counter Modules, Sensor Interface Boards, LED Display Drivers, Security Keypad and Access Panels.
Consumer Appliance Control
The PIC16LCE624-04/SS fits appliance control boards (washing machines, microwave ovens, dishwashers, coffee makers) where its 8-bit RISC core and integrated peripherals drive relay and triac outputs directly. With 1.75 KB of OTP program memory, the MCU holds complete timing, sensor-processing, and user-interface firmware for a single appliance function, and the analog comparator enables direct sensing of line-voltage zero-cross for synchronized triac firing. The 4 MHz clock is sufficient for keypad debounce, LED multiplexing, and basic PID loops. Commercial temperature grade (0 C to +70 C) matches indoor appliance environments, and the SSOP-20 footprint is small enough for compact main-control boards.
Recommended
Remote Control Transmitters
Battery-powered remote controls benefit from the PIC16LCE624-04/SS's low-voltage "L" variant (operates from 2.5 V down to a single alkaline or two-cell NiMH pack). The 13 I/O pins directly drive a keypad matrix plus an IR LED for transmission, while the integrated timer handles carrier-frequency generation and PWM creates the modulation waveform. The 4 MHz instruction rate is more than adequate for protocol timing, and the SSOP-20 footprint keeps the PCB under 20 mm square. The watchdog timer with its own RC oscillator provides reliable operation across battery voltage droop.
Recommended
Industrial Timer and Counter Modules
Standalone industrial timer, totalizer, and event-counter modules use the PIC16LCE624-04/SS to count pulses from sensors or meters, debounce mechanical inputs, and drive 7-segment or LCD displays. Its three hardware timers (Timer0, Timer1, Timer2) handle input capture, interval timing, and PWM generation simultaneously without CPU overhead, and the integrated analog comparator can detect pulse-amplitude thresholds directly. Industrial designs should prefer the PIC16LCE624-04I/SS (-40 C to +85 C) variant, which is pin-compatible with the SSOP-20 footprint of this part.
Recommended
Sensor Interface Boards
Dedicated sensor-interface boards - including temperature, humidity, pressure, and proximity nodes - leverage the PIC16LCE624-04/SS's analog comparator and 13 digital I/O to read sensor outputs, apply linearization or thresholding, and forward data over a simple UART or one-wire interface. The 96 bytes of RAM hold sample buffers and protocol state, and the 16-byte EEPROM retains calibration constants across power cycles. At 4 MHz the MCU completes ADC-free comparator-based sampling in microseconds, enabling responsive threshold detection in security and HVAC sensor products.
Recommended
LED Display Drivers
LED matrix and 7-segment driver boards use the PIC16LCE624-04/SS to multiplex displays, generate PWM for dimming, and accept commands from a host controller. The integrated CCP/PWM module produces accurate dimming waveforms without CPU intervention, freeing the core for display-refresh and command-parsing tasks. With 13 I/O pins the MCU drives an 8-character 7-segment display plus key-scan inputs in a single chip, eliminating an external driver. The 5.5 V supply tolerance enables direct connection to standard LED-anode drivers.
Recommended
Security Keypad and Access Panels
Low-end security keypads, access-control panels, and alarm-system arming stations use the PIC16LCE624-04/SS to scan 4x4 or 3x4 key matrices, validate PIN codes, and drive buzzers, LEDs, and relay outputs. The on-chip EEPROM stores user codes and audit counts, while the watchdog timer prevents lockup in unattended installations. The SSOP-20 footprint fits inside standard wall-mount keypad enclosures, and the commercial temperature grade suits indoor climate-controlled spaces. For outdoor installations, choose the PIC16LCE624-04I/SS industrial variant.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LCE624-04/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LCE624-04I/SS | PIC16LCE624T-04/SS | PIC16LCE624-04E/SS | PIC16F628-I/SS |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | SSOP-20 | SSOP-20 (same) | SSOP-20 (same) | SSOP-20 (same) | SSOP-20 (same) |
| Program Memory | 1.75 KB OTP | 1.75 KB OTP | 1.75 KB OTP | 1.75 KB OTP | 3.5 KB Flash |
| RAM | 96 bytes | 96 bytes | 96 bytes | 96 bytes | 224 bytes |
| Maximum Clock Speed | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz (with internal osc) |
| Operating Temperature | 0 C to +70 C (Commercial) | -40 C to +85 C (Industrial) | 0 C to +70 C (Commercial) | -40 C to +125 C (Extended) | -40 C to +85 C (Industrial) |
| 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 | 3.0 V to 5.5 V |
| Memory Type | OTP (one-time programmable) | OTP | OTP | OTP | Flash (rewritable) |
Key Differentiators
- Pin-compatible with PIC16F628 flash-based successor (vs PIC16F628-I/SS)
- Commercial temperature grade suits indoor appliances (vs PIC16LCE624-04I/SS)
- Integrated analog comparator without external ADC (vs PIC16LC622-04/SS)
Design Notes
Place a 0.1 uF decoupling capacitor as close as possible to the VDD pin (pin 14) with a short trace to VSS (pin 5). For designs using the analog comparator, add a 10 uF bulk capacitor on the supply rail near the MCU. The MCLR/RA5 pin (pin 4) requires a 10 kohm pull-up to VDD for normal operation; if not used as a reset input, it can serve as a digital input only after disabling the MCLR function in the configuration word.
OTP memory cannot be erased. Validate firmware on a PIC16F-series flash equivalent (PIC16F628) before committing to OTP production programming. Engineering prototypes should always use the flash variant to allow iteration, with the OTP version ordered only after the firmware is locked. Plan an inventory buffer of pre-programmed OTP parts to absorb late firmware revisions or batch defects.
Keep the OSC1/OSC2 traces (pins 15 and 16) short and surrounded by a ground pour to minimize oscillator noise coupling. If using a crystal, place the load capacitors within 5 mm of the oscillator pins. For high-noise environments (motor control, relay switching), add a small ferrite bead or 10 ohm resistor in series with VDD to suppress conducted noise from reaching the MCU supply.
The PIC16LCE624-04/SS draws approximately 2 mA active at 4 MHz and 5 V. For battery-powered designs, leverage the SLEEP instruction plus watchdog timer wakeup to achieve quiescent currents below 10 uA. The integrated analog comparator can remain active during SLEEP, enabling ultra-low-power sensor monitoring with periodic CPU wakeup for data processing.
Compliance Information
RoHS compliant per Microchip product environmental data; lead-free SSOP-20 package. NRND (Not Recommended for New Designs) - prefer PIC16F628 family for new projects.
