PIC16LCE623T-04I/SS - 8-Bit 4MHz MCU, 896B OTP, SSOP-20 | Microchip
MPN: PIC16LCE623T-04I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $3.07 | $30.70 |
| 100 | $2.74 | $274.00 |
| 500 | $2.41 | $1,205.00 |
| 1,000 | $2.1 | $2,100.00 |
PIC16LCE623T-04I/SS Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and configurable peripherals. The PIC16C/PIC16LC sub-family is one of Microchip's classic mid-range architectures, pairing a 14-bit instruction word with a Harvard bus and a RISC-style instruction set for deterministic, byte-efficient embedded code. The 'LC' suffix denotes the low-voltage CMOS variant, allowing operation down to 2.0 V for battery-powered designs. Within the broader taxonomy, PIC16LCE623 sits as: microcontroller -> embedded MCU -> 8-bit MCU -> PIC mid-range MCU -> CMOS semiconductor IC.
Key features include an internal 4 MHz oscillator, 8-bit data path, 14-bit instruction word, hardware multiplier (by subtraction), 8-level hardware stack, two 8-bit timers (Timer0, Timer2) plus one 16-bit timer (Timer1), a Capture/Compare/PWM (CCP) module, an analog comparator with selectable reference, 5-channel 8-bit ADC, and an internal watchdog timer with on-chip RC oscillator. Brown-out reset and power-on reset are circuit-stable. The PIC16LC core supports in-circuit serial programming (ICSP) via RB6/RB7, eliminating the need for an external programmer socket.
The PIC16LCE623T-04I/SS uses Microchip's nanoWatt technology extensions, providing low-power sleep modes and a programmable weak pull-up on PORTB. The CMOS process yields typical active current of less than 2 mA at 4 MHz / 5 V, and sleep currents in the microampere range. The 20-pin SSOP (5.30 mm body width, 0.65 mm pitch) supports surface-mount assembly in space-constrained boards where through-hole PDIP is impractical.
Typical applications include low-cost consumer white goods, battery chargers, sensor signal conditioning, LED driving controllers, small appliance control, and industrial sensor interfaces. The wide 2.0-6.0 V operating range makes it directly suitable for both 3.3 V and 5 V rails. The 128-byte EEPROM supports user-configurable parameter storage without external serial EEPROM chips. Designers select this MCU for applications where deterministic 8-bit processing, low power, and 20-pin SSOP integration outweigh the need for larger flash memory or peripherals.
When designing with this part, note that 'T' suffix denotes tape-and-reel, 'I' denotes industrial temperature grade (-40C to +85C), and '04' marks the 4 MHz maximum clock. The 'SS' package suffix identifies SSOP-20. Reserve the RB6/RB7 pins for ICSP if in-system programming is required.
This page synthesizes distributor pricing, drop-in alternatives drawn from the same Microchip PIC16 family, and practical design notes not found in the bare manufacturer datasheet.
Drop-in alternatives for PIC16LCE623T-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 PIC16LCE623T-04I/SS (same form factor and footprint) — differing in Operating Temperature, Package, Program Memory Size, Program Memory Type, Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LCE623-04I/SS
✅ Drop-In✓ In Stock
$1.55 / Unit
View Datasheet →PIC16LC622A-04I/SS
✅ Drop-In✓ In Stock
$1.56 / Unit
View Datasheet →PIC16LC621A-04I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LC620A-04I/SS
✅ Drop-In✓ In Stock
$1.55 / Unit
View Datasheet →PIC16LC782T-I/SS
✅ Drop-In✓ In Stock
$3.18 / Unit
View Datasheet →PIC16LCE623T-04I/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 8-bit RISC |
| Family | PIC16C / PIC16LC mid-range |
| CPU Core | PIC16 |
| Maximum Clock Speed | 4 MHz |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 896 bytes (512 x 14 words) |
| Data RAM Size | 96 bytes |
| EEPROM Data Memory | 128 bytes |
| Supply Voltage Range | 2.0 V to 6.0 V |
| I/O Pins | 13 |
| Package Type | SSOP-20 (5.30 mm body) |
| Operating Temperature | -40C to +85C (industrial) |
| ADC | 8-bit, 5 channels |
| Timers | 2 x 8-bit + 1 x 16-bit |
| CCP Modules | 1 |
| Analog Comparators | Yes, with selectable reference |
| Watchdog Timer | Yes, with internal RC oscillator |
| In-Circuit Serial Programming | Yes (RB6/RB7) |
| Brown-out Reset / Power-on Reset | Yes |
PIC16LCE623T-04I/SS Pin Configuration
| Pin 1 | RA2/AN2/VREF-/CVREF — PORTA bit 2, analog input, comparator reference minus, comparator output reference |
| Pin 2 | RA3/AN3/VREF+/C1OUT — PORTA bit 3, analog input, comparator reference plus, comparator 1 output |
| Pin 3 | RA4/T0CKI/AN4 — PORTA bit 4, Timer0 clock input, analog input |
| Pin 4 | RA5/MCLR/VPP — PORTA bit 5 / Master Clear reset (active low) / programming voltage input |
| Pin 5 | VSS — Ground reference |
| Pin 6 | RB0/INT — PORTB bit 0, external interrupt input |
| Pin 7 | RB1 — PORTB bit 1 |
| Pin 8 | RB2 — PORTB bit 2 |
| Pin 9 | RB3/PGM — PORTB bit 3, low-voltage ICSP programming input |
| Pin 10 | RB4 — PORTB bit 4 (interrupt-on-change) |
| Pin 11 | RB5 — PORTB bit 5 (interrupt-on-change) |
| Pin 12 | RB6/PGC — PORTB bit 6, in-circuit debugger / ICSP clock |
| Pin 13 | RB7/PGD — PORTB bit 7, in-circuit debugger / ICSP data |
| Pin 14 | RC0/T1OSO/T1CKI — PORTC bit 0, Timer1 oscillator output or clock input |
| Pin 15 | RC1/T1OSI/CCP2 — PORTC bit 1, Timer1 oscillator input or CCP2 I/O |
| Pin 16 | RC2/CCP1 — PORTC bit 2, Capture/Compare/PWM 1 |
| Pin 17 | RC3 — PORTC bit 3 |
| Pin 18 | RC4 — PORTC bit 4 |
| Pin 19 | RC5 — PORTC bit 5 |
| Pin 20 | RC6 — PORTC bit 6 |
Typical Applications
PIC16LCE623T-04I/SS is suitable for 6 applications: Battery-Powered Sensor Node, White Goods Control Board, Small Appliance LED Driver Controller, Industrial Sensor Interface Module, Consumer Remote Control / IR Toy, Battery Charger Controller.
Battery-Powered Sensor Node
The PIC16LCE623T-04I/SS is well suited to battery-powered sensor nodes because of its 2.0 V minimum VDD and nanoWatt sleep modes, which together cut quiescent drain to the microampere range between ADC samples. With 4 MHz maximum CPU clock and a 5-channel 8-bit ADC, the device can wake, sample a thermistor or photodiode, run a small compensation routine, and return to sleep within a few hundred microseconds - easily achievable on two AA cells for multi-year deployments. The 128-byte internal EEPROM stores calibration coefficients without an external serial EEPROM. Compared with switching to a modern Cortex-M0+, this part wins on cost, deterministic interrupt latency, and legacy code reuse. Designers should run the CPU at 32 kHz via Timer1 during sleep and only switch to the 4 MHz oscillator for active conversions.
Recommended
White Goods Control Board
The PIC16LCE623T-04I/SS is widely deployed in white-goods control boards (washing machines, dishwashers, microwave ovens) where the 8-bit deterministic core, 13 I/O pins, and 4 MHz CPU clock drive relays, triac firing circuits, and user-key scanning. The OTP program memory is sufficient for fixed-function firmware in cost-sensitive appliances, while the 128-byte EEPROM stores cycle counters and user preferences that survive power loss. The SSOP-20 surface-mount package suits the compact main-control PCB where through-hole PDIP would consume too much board area. The PIC16LCE623's Capture/Compare/PWM module generates precise triac firing pulses for zero-crossing dimming and motor-speed control. Per Microchip application notes, the LC low-voltage variant handles brown-out recovery cleanly across the 2.0-6.0 V range, surviving mains sag without resetting user-state.
Recommended
Small Appliance LED Driver Controller
The PIC16LCE623T-04I/SS serves as an LED driver controller in small appliances - desk lamps, range hoods, refrigerator lights - where its CCP PWM module and 8-bit ADC combine to deliver constant-current dimming without an external driver IC. The 4 MHz CPU executes closed-loop current regulation at 1-2 kHz, easily handling the 100 Hz PWM frequency required for flicker-free dimming of high-brightness LEDs. With 13 I/O pins, the MCU can drive up to six independent LED channels while still leaving pins for tactile buttons, a thermistor input, and serial diagnostics. The OTP memory locks the firmware, preventing field tampering - an advantage over flash MCUs in cost-sensitive consumer appliances. Compared with dedicated LED driver ICs, this part offers flexibility to add features (soft-start, thermal foldback, daylight sensing) without board redesign.
Recommended
Industrial Sensor Interface Module
The PIC16LCE623T-04I/SS is a strong fit for industrial sensor interface modules such as 4-20 mA loop-powered transmitters, RTD conditioners, and bridge load-cell front ends. Its 5-channel 8-bit ADC digitizes bridge outputs, its analog comparator with selectable reference provides over-range detection, and its 2.0-6.0 V VDD range supports 5 V industrial backplanes and 3.3 V logic-level PLCs. The 128-byte EEPROM retains calibration constants and unit identity across power cycles. The industrial -40C to +85C temperature grade ensures operation in factory-floor enclosures. Designers use the CCP module to generate excitation pulses for ratiometric sensor measurement, reducing long-term drift. Compared with discrete op-amp solutions, this PIC-based design consolidates signal conditioning, linearization, and HART-style digital communication into one 20-pin SSOP device.
Recommended
Consumer Remote Control / IR Toy
The PIC16LCE623T-04I/SS drives consumer remote controls and IR-controlled toys where size, weight, and battery life dominate the BOM. Operating from a single CR2032 coin cell (3 V nominal), the 2.0-6.0 V LC variant runs the 4 MHz core for a few millisecond IR-burst bursts, then returns to sub-microamp sleep - yielding coin-cell life measured in months. The CCP module generates 38 kHz carrier frequencies with sub-microsecond jitter, essential for NEC/RC5 protocol compatibility. The 13 I/O pins support up to a 4x4 keypad matrix plus status LEDs and the IR emitter driver. The 896-byte OTP memory is more than enough for protocol stacks plus button debouncing logic. Designers appreciate that the 20-pin SSOP package drops directly into miniaturized remote-control PCBs where DIP variants would not fit.
Recommended
Battery Charger Controller
The PIC16LCE623T-04I/SS operates as a battery charger controller for NiMH, Li-ion, and lead-acid packs in the 1-10 cell range. Its 8-bit ADC samples charging current and battery voltage with adequate resolution for CC/CV termination algorithms, while the 128-byte EEPROM stores battery profile parameters and charge-cycle counters. The PWM/CCP module drives a buck or linear regulator MOSFET via optocoupler or direct gate drive. The 2.0-6.0 V supply supports direct operation from a single lithium cell or from a 5 V USB rail. The OTP memory locks the firmware version, an important safety and IP-protection consideration. Compared with dedicated charger ICs, this PIC-based design supports user-configurable chemistry, multi-stage charging, and LCD display interfacing all in one SSOP-20 device, simplifying the BOM for hobbyist and prosumer battery products.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LCE623T-04I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LCE623-04I/SS | PIC16LC622A-04I/SS | PIC16LC621A-04I/SS | PIC16LC620A-04I/SS | PIC16LC782T-I/SS |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | 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) | SSOP-20 (same) |
| Maximum Clock Speed | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| Program Memory (OTP) | 896 bytes | 896 bytes (same) | Lower density | Lower density | Lower density | Comparable |
| EEPROM Data Memory | 128 bytes | 128 bytes (same) | None on select variants | None | None | None |
| Data RAM | 96 bytes | 96 bytes (same) | Comparable | Comparable | Comparable | Comparable |
| Supply Voltage Range | 2.0 V to 6.0 V | 2.0 V to 6.0 V | 2.0 V to 6.0 V | 2.0 V to 6.0 V | 2.0 V to 6.0 V | 2.0 V to 6.0 V |
| I/O Pins | 13 | 13 | 13 | 13 | 13 | Comparable |
| Operating Temperature | -40C to +85C | -40C to +85C (same) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Memory Type | OTP EPROM | OTP EPROM (same) | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM |
Key Differentiators
- On-chip 128-byte EEPROM for parameter storage (vs PIC16LC621A-04I/SS)
- Low-voltage 2.0 V minimum VDD for battery operation (vs PIC16C622-04I/SS)
- Industrial -40C to +85C temperature grade as standard (vs PIC16LC621A-04I/SS)
- 13 I/O pins with 5-channel 8-bit ADC and CCP PWM (vs PIC16LC620A-04I/SS)
Design Notes
The PIC16LCE623T-04I/SS operates from 2.0 V to 6.0 V VDD, but the brown-out reset threshold and ADC accuracy both degrade as VDD approaches 2.0 V. Decouple VDD with a 100 nF ceramic capacitor placed within 5 mm of the VDD pin and a bulk tantalum or electrolytic capacitor of at least 10 uF on the same rail to suppress switching transients from relay coils or motor driver MOSFETs. For battery-powered designs, estimate average current as I_avg = I_active * (t_active / t_period) + I_sleep * (1 - t_active / t_period); with t_active=10 ms every 1 s, even a 2 mA active draw yields under 30 uA average - enabling multi-year coin-cell life.
Do not leave the MCLR/VPP pin floating: tie it to VDD through a 10 kohm resistor for normal operation, or to the ICSP programmer header during development. Floating MCLR causes spurious resets and erratic program execution. Likewise, disable the watchdog timer in configuration bits if it is not intentionally used - a stale WDT timeout is a common cause of unexplained board resets in field-deployed PIC16 designs. Configure unused PORTB pins as outputs (not inputs) to prevent CMOS shoot-through current. Finally, note that the PIC16C62X/64X/66X instruction word is 14 bits wide; code compiled for 16-bit-wide PIC16F1xxx cores (PIC16 enhanced mid-range) is NOT binary-compatible with this device.
The SSOP-20 package has 0.65 mm pin pitch and requires reflow soldering; do not attempt hand-soldering of production volumes. Reserve RB6 (PGC) and RB7 (PGD) for ICSP - do not assign them to high-frequency switching signals that would couple noise into the programming lines. Provide a 6-pin ICSP header (VPP, VDD, VSS, PGD, PGC, AUX) on prototype boards for in-system programming. For SSOP-20 land pattern, follow IPC-7351 nominal-density pads: 0.40 mm wide pads with 0.30 mm pitch extension, copper-defined or solder-mask-defined per your fab house. Add a copper pour under the exposed die attach pad area (no exposed pad on SSOP-20 - thermal relief is via package leads only) for ground stitching if EMI is a concern.
PIC16LCE623T-04I/SS is a low-power CMOS MCU with typical active current of 1-2 mA at 4 MHz / 5 V, dissipating under 15 mW even at full CPU load. No external heatsink is required. However, in sealed enclosures with ambient temperatures above 60C, the industrial -40C to +85C temperature grade still leaves 25C margin. The die junction temperature is best estimated from the SSOP-20 thermal resistance of approximately 90 C/W (theta_JA on JEDEC EIA/JESD51 2s2p test board); at 2 mA active and 5 V, junction rise above ambient is only 0.9C, so thermal design is essentially a non-issue compared with peripheral power dissipation.
PIC16 GPIO pins have limited drive strength (typically 20-25 mA source/sink per pin, 100 mA per port). For switching inductive loads (relays, solenoids), use a driver transistor or MOSFET between the MCU pin and the load, and add a flyback diode across the inductive element. For analog inputs to the 8-bit ADC, place a 100 ohm series resistor and 10 nF capacitor to ground as an RC anti-alias filter; this bandwidth-limits the input to about 160 kHz, well below the ADC's Nyquist limit. Keep analog signal traces short and away from digital switching lines, and use a guard ring around the analog input pin tied to analog ground for best ADC performance.
Compliance Information
Compliance data not present in the verified web results. RoHS, REACH, and halogen-free status should be confirmed against the manufacturer datasheet and your distributor's certificate of conformance before production use. AEC-Q100 is not applicable - this is a general-purpose MCU, not an automotive-qualified part. For automotive designs, select a PIC16F1xxx or PIC18 K-series with explicit AEC-Q100 grade.
