PIC16LC620T-04E/SO - 8-Bit 4MHz OTP MCU 18-SOIC | Microchip
MPN: PIC16LC620T-04E/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $3.08 | $30.80 |
| 100 | $2.74 | $274.00 |
| 500 | $2.41 | $1,205.00 |
| 1,000 | $2.13 | $2,130.00 |
PIC16LC620T-04E/SO Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data RAM, and peripherals such as timers, A/D converters, and communication interfaces. In the broader system hierarchy, the PIC16LC620 belongs to the PIC16C family of RISC microcontrollers, which sits under the 8-bit MCU category, which itself is a subset of embedded microcontrollers and, ultimately, microprocessors and semiconductors. Low-power (LC) variants are optimized for battery-powered applications through reduced core voltage operation.
Key features of the PIC16LC620T-04E/SO include a RISC instruction set with 35 single-word instructions, a two-level deep hardware stack, 12-bit-wide instructions and an 8-bit-wide data path, plus seven or eight special-function hardware registers. Brown-out Detect/Reset and Power-on Reset peripherals are integrated, and the device supports direct, indirect, and relative addressing modes for efficient C and assembly development.
The architecture employs a Harvard-style memory layout with separate program and data buses, allowing instruction fetch and data access to occur in the same cycle. This delivers deterministic 4 MHz throughput with single-cycle instruction execution, which is critical for real-time control loops. On-chip peripherals such as timers, a comparator, and an internal oscillator reduce external component count.
Typical applications include automotive body controllers, sensor conditioning front-ends, low-power remote keyless entry transmitters, industrial control modules, and small appliance control boards. The wide supply range (2.5 V to 6.25 V) allows direct connection to 3.3 V or 5 V rails.
When designing with this part, note that OTP memory is one-time programmable and cannot be re-flashed - choose PIC16F variants for in-circuit reprogrammability. Place a 0.1 uF decoupling capacitor adjacent to VDD and keep oscillator traces short.
This page synthesizes distributor stock data, drop-in OTP/EPROM alternatives, and practical design notes not consolidated on any single distributor listing.
Drop-in alternatives for PIC16LC620T-04E/SO — 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 PIC16LC620T-04E/SO (same form factor and footprint) — differing in Package, Program Memory Size, Program Memory Type, Instruction Cycle, Operating Temperature Range.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LC620AT-04E/SO
✅ Drop-In✓ In Stock
$2.25 / Unit
View Datasheet →PIC16LC620A-04E/SO
✅ Drop-In✓ In Stock
$2.07 / Unit
View Datasheet →PIC16LC620-04E/SO
✅ Drop-In✓ In Stock
$1.78 / Unit
View Datasheet →PIC16LC620AT-04I/SO
✅ Drop-In✓ In Stock
$1.62 / Unit
View Datasheet →PIC16LC558-04I/SO
✅ Drop-In✓ In Stock
$1.1 / Unit
View Datasheet →PIC16C558T-04/SO
✅ Drop-In✓ In Stock
$1.65 / Unit
View Datasheet →PIC16LC620T-04E/SO Maximum Ratings & Electrical Characteristics
| Core Processor | PIC |
| Core Size | 8-Bit |
| CPU Speed | 4 MHz |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 896 B (512 x 14) |
| I/O Pins | 12 |
| Supply Voltage Range | 2.5 V to 6.25 V |
| Package | 18-SOIC (0.295", 7.50 mm width) |
| Mounting Type | Surface Mount |
| Instruction Width | 12-bit |
| Data Path Width | 8-bit |
| Hardware Stack | 2-level deep |
| Addressing Modes | Direct, Indirect, Relative |
| Special Function Registers | 7 or 8 |
| Lifecycle Stage | Active |
| Integrated Peripherals | Brown-out Detect/Reset, POR |
PIC16LC620T-04E/SO Pin Configuration
| Pin 1 | MCLR — Master Clear (Reset) input, active low |
| Pin 2 | RA0 — Bidirectional digital I/O pin |
| Pin 3 | RA1 — Bidirectional digital I/O pin |
| Pin 4 | RA2 — Bidirectional digital I/O pin |
| Pin 5 | RA3 — Bidirectional digital I/O pin |
| Pin 6 | RA4 — Bidirectional digital I/O / timer output |
| Pin 7 | RA5 — Bidirectional digital I/O pin |
| Pin 8 | VSS — Ground reference |
| Pin 9 | OSC1 — Oscillator input / external clock input |
| Pin 10 | OSC2 — Oscillator output |
| Pin 11 | RC0 — Bidirectional digital I/O pin |
| Pin 12 | RC1 — Bidirectional digital I/O pin |
| Pin 13 | RC2 — Bidirectional digital I/O pin |
| Pin 14 | RC3 — Bidirectional digital I/O pin |
| Pin 15 | RC4 — Bidirectional digital I/O pin |
| Pin 16 | RC5 — Bidirectional digital I/O pin |
| Pin 17 | RC6 — Bidirectional digital I/O pin |
| Pin 18 | RC7 — Bidirectional digital I/O pin |
Typical Applications
PIC16LC620T-04E/SO is suitable for 6 applications: Automotive Body Control Modules, Remote Keyless Entry (RKE) Transmitters, Industrial Sensor Signal Conditioning, Small Appliance Control Boards, Battery-Powered Wireless Sensor Nodes, LED Lighting Controllers.
Automotive Body Control Modules
The PIC16LC620T-04E/SO's automotive temperature rating and 2.5-6.25 V supply range suit 12 V automotive body controllers after regulation. With 12 I/O pins and integrated brown-out reset, it can directly drive small loads such as courtesy lamps, mirror actuators, and seat controls via external MOSFETs. The 4 MHz MIPS throughput handles PWM dimming and switch debounce in real time. Compared with flash MCUs, the OTP memory prevents unauthorized firmware reads, which is a security advantage for OEM automotive subsystems.
Recommended
Remote Keyless Entry (RKE) Transmitters
The PIC16LC620T-04E/SO's low-power CMOS design fits battery-powered RKE keyfobs where standby current dominates battery life. The 12 I/O pins can drive four matrix-scan button inputs and an RF transmitter enable line, while internal brown-out reset prevents corrupted transmission when battery voltage sags. The 4 MHz instruction rate is sufficient for rolling-code encryption and button debounce in < 10 ms response time. EPROM OTP also gives OEMs a security advantage over flash, since firmware cannot be read back.
Recommended
Industrial Sensor Signal Conditioning
Industrial sensor front-ends benefit from the PIC16LC620T-04E/SO's 2.5-6.25 V supply range and 4 MHz throughput for linearizing thermocouple or RTD signals before ADC. With 12 I/O pins, the MCU can multiplex several sensors, drive an LCD, and handle a UART link to a host controller. The integrated brown-out detect prevents erratic ADC readings during brown-out events, and the wide supply tolerance simplifies 24 V industrial bus designs after a simple linear regulator.
Recommended
Small Appliance Control Boards
In coffee makers, microwave ovens, and washing machines, the PIC16LC620T-04E/SO's 12 I/O pins can scan keypads, drive seven-segment displays, and control TRIAC/relay outputs for heater or motor elements. The 4 MHz throughput handles simple state machines and timer functions; the wide 2.5-6.25 V supply supports direct 5 V regulated rails. OTP memory reduces per-unit cost versus flash MCUs, which is important in cost-sensitive consumer appliances.
Recommended
Battery-Powered Wireless Sensor Nodes
The PIC16LC620T-04E/SO's low-power CMOS core and 2.5 V minimum supply extend battery life in remote wireless sensor nodes. With 12 I/O pins, the MCU can wake a sub-GHz radio module, read a sensor, and return to sleep, all within tight power budgets. The 4 MHz throughput is adequate for sensor linearization and packet formatting, while the brown-out detector protects against brown-outs as the battery discharges. EPROM OTP also protects proprietary sensor-calibration firmware from reverse engineering.
Recommended
LED Lighting Controllers
The PIC16LC620T-04E/SO can serve as a low-cost LED controller for decorative or architectural lighting. Its 4 MHz instruction rate supports PWM generation at frequencies above 100 Hz, avoiding visible flicker, while 12 I/O pins can drive multiple LED channels via external MOSFET drivers. The 2.5-6.25 V supply range supports direct connection to 3.3 V or 5 V LED driver rails, and the small 18-SOIC footprint enables compact PCB designs for inline LED controllers and strip-light dimmers.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LC620T-04E/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LC620AT-04E/SO | PIC16LC620A-04E/SO | PIC16LC620-04E/SO | PIC16LC620AT-04I/SO | PIC16LC558-04I/SO | PIC16C558T-04/SO |
|---|---|---|---|---|---|---|---|
| Package | 18-SOIC | 18-SOIC - same | 18-SOIC - same | 18-SOIC - same | 18-SOIC - same | 18-SOIC - same | 18-SOIC - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core Size | 8-Bit | 8-Bit | 8-Bit | 8-Bit | 8-Bit | 8-Bit | 8-Bit |
| CPU Speed | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| Program Memory | 896 B (512 x 14) OTP | 896 B OTP | 896 B OTP | 896 B OTP | 896 B OTP | 768 B OTP (-14%) | 768 B EPROM (-14%) |
| Supply Voltage | 2.5 V to 6.25 V | 2.5 V to 6.25 V | 2.5 V to 6.25 V | 2.5 V to 6.25 V | 2.5 V to 6.25 V | 2.5 V to 6.25 V | 3.0 V to 5.5 V |
| I/O Pins | 12 | 13 | 13 | 12 | 13 | 13 | 13 |
| Memory Type | OTP | OTP | OTP | OTP | OTP | OTP | EPROM |
Key Differentiators
- Wider supply voltage range than PIC16C558 variants (vs PIC16C558T-04/SO)
- Larger program memory than PIC16LC558 family (vs PIC16LC558-04I/SO)
- Automotive temperature grade for harsh environments (vs PIC16LC620A-04E/SO)
Design Notes
Place a 0.1 uF ceramic decoupling capacitor as close as possible to the VDD pin (pin 14 area) to suppress switching transients. Add a bulk capacitor of 1-10 uF at the supply rail entry point. The PIC16LC620T-04E/SO draws low quiescent current thanks to its CMOS design, but I/O switching transients still require local bypass. For battery applications, gate peripheral power through a MOSFET controlled by an I/O pin to reach nanoampere standby currents.
Keep oscillator traces (OSC1/OSC2) short and route them over a continuous ground plane to minimize EMI and improve clock stability. If using a crystal oscillator, place load capacitors within 5 mm of the OSC pins and keep them on the same PCB layer. Avoid routing high-current signals parallel to the clock traces, as capacitive coupling can inject jitter into the system clock.
OTP memory cannot be erased or rewritten - verify firmware thoroughly with a PIC16F equivalent flash part during development, then commit the final image to PIC16LC620T-04E/SO for production. MCLR must be pulled high through a 10 kohm resistor; leaving MCLR floating causes erratic resets. Ensure the supply rises monotonically during power-up; the brown-out reset peripheral will hold the device in reset if VDD sags below the brown-out threshold.
Compliance Information
RoHS status, REACH status, and halogen-free status not explicitly stated in the provided data; lead-free per Microchip packaging standards for SOIC variants. AEC-Q100 not applicable for the standard 18-SOIC part - check Microchip documentation for automotive-qualified variants.