NEXSYS® Component Technology – State Control Components

Electronic Latch

Electronic Latch

Summary Description

The NEXSYS Electronic Latch (EL1, EL2) is a Series C (8 pin) electronic circuit with multiple trigger modes that activate orthogonal (flip-flop) switching between two known states.

Electronic Latch Block Diagram

Input Characteristics

28V: Operating voltage (nom.), 4 mA current draw (max.). 

GND: Continuous ground required. 

/RST: immediate activation to reset (/RST) state. 

/TGL: Detects signal transitions, which function as the control interface to drive outputs. 

/SET: immediate activation to set (/SET) state.

Output Characteristics

Q, Q: Open-drain outputs are Ground when active and High Impedance when not active. Power-up state (see Configuration Options) determines initial state of outputs and blink (BLK). The output load capacity is 2.0 A (Resistive). 

BLK: Open-drain output that produces a 1 Hz square wave (50% duty cycle) signal when active and is High Impedance when not active. 

Configuration Options

The NEXSYS Electronic Latch is available in two options based on desired power-up state with no inputs active.

Electronic Latch 1 (EL1): Powers up with Q output at High Impedance, Q at Ground and BLK inactive (High Impedance). 

Electronic Latch 2 (EL2): Powers up with Q output at Ground, Q at High Impedance and BLK active (oscillating). 

Electronic Latch– Application Examples

To help system designers understand the potential of NEXSYS Component Technology, we have assembled a collection of Application Notes. The links below show example applications that utilize the Electronic Latch  component.

Application Example

ICS Cabin Call/Flight Deck Isolate

ICS Cabin Call/Flight Deck Isolate This application details an aircraft internal communication system (ICS). The design provides flexibility that allows flight deck to isolate from cabin audio, while still allowing the cabin to initiate a call.