What are the key applications for the LJ3405?

It is commonly used in security alarm systems, automatic door controls, motion-sensing lights, and smart home automation.

What are the main features of the LJ3405?

It includes a high-input impedance op-amp, dual-threshold voltage comparator, programmable delay and lockout timers, and low power consumption suitable for battery-powered devices.

How is the timing configured?

The delay and lockout times are configured using an external capacitor (CT) and pull-up resistor (RT) connected to the CT pin.

What is the pinout of LJ3405?

Use the LJ3405 datasheet for the official pinout diagram and pin names. In PartGenie, ask Datasheet AI about LJ3405 pinout to locate pins, power rails, and interface signals before layout.

LJ3405 Datasheet, Specs, Alternatives & ECAD | GUOXIN JIAPIN SEMICONDUCTOR

AI summary

The LJ3405 is a low-power PIR sensor processing IC designed for motion detection applications, featuring integrated timers and high-impedance op-amps.

Best for

Battery-powered motion sensors
Security lighting

Avoid if

High-precision industrial sensing
Applications requiring non-standard timing logic

Check before use

PCB layout guidelines for PIR sensors
RC component tolerance

Key specifications

Supply Voltage: 3V - 6V
Static Current: 45uA (3V)
Package: SOP8

Compliance & Environment

RoHS: Compliant
REACH: -
MSL: -
ECCN: -
HTSUS: -

Application

Motion SensingSecurity

Datasheet

0e7dd4442d8e4f4bea9b520b5bf37262_2204211700_GUOXIN-JIAPIN-SEMICONDUCTOR-LJ3405_C2992567.pdf

800 KB

Datasheet AI

CAD Models

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PCB Footprint

Land pattern for PCB layout

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3D Model

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KiCad Library

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Alternative components

Alternatives are being enriched. Analyze this part in PartGenie for the latest matches.

Design and risk insights

Questions & answers

The LJ3405 is a mixed-signal CMOS IC specifically designed to amplify and process signals from pyroelectric infrared (PIR) sensors.

AI summary

Best for

Avoid if

Check before use

Key specifications

Compliance & Environment

Application

Datasheet

CAD Models

Alternative components

Design and risk insights

Questions & answers

What is the LJ3405?+×

What are the key applications for the LJ3405?+×

What are the main features of the LJ3405?+×

How is the timing configured?+×

What is the pinout of LJ3405?+×