73S8009CN-DB Maxim Integrated Products, 73S8009CN-DB Datasheet - Page 13

• Manufacturer Part Number: 73S8009CN-DB
• Description: BOARD DEMO FOR 73S8009CN
• Manufacturer: Maxim Integrated Products

Specifications of 73S8009CN-DB

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

UM_8009CN_060
73S8009CN Demo Board User Manual
4.4
ON/OFF Switch Operation
The ON/OFF switch uses a pushbutton to toggle between turning the 73S8009CN on and off. The switch
input contains a debounce circuit for protection.
The 73S8009CN defaults to the OFF state when the
power source is applied. When the 8009C is in the OFF state, a switch closure turns on the 73S8009CN.
When the 73S8009CN is ON, a switch closure does not turn off the 73S8009CN by itself, but it activates
the OFF_REQ signal by setting it high. The 73S8009CN does not shut off until the OFF_ACK is set high.
The purpose of this sequence is to allow the host processor to perform any necessary shut down tasks
before losing power. When the host is finished, it can set the OFF_ACK signal high to shut off the
73S8009CN. If there is no need for the host to perform any shutdown tasks, the OFF_ACK pin can be
left open and it follows the state of the OFF_REQ output by means of an internal resistor connection
between the OFF_REQ and OFF_ACK pins.
Rev. 1.1
13