G682H09SQL1U datasheet(13/18 Pages) GMT

13 / 18 page

Ver: 0.8

Feb 27, 2013

TEL: 886-3-5788833

http://www.gmt.com.tw

G682/G683

Global Mixed-mode Technology

Functional Diagram

Figure 2

Separated Sense Pin

Since the sense pin is separated from power supply, it

allows the IC to monitor added power supply. Using the

IC with the sense pin separated from power supply

enables output to maintain the state of detection even

when voltage of the monitored power supply drops to

0V.

Adjustable Reset Threshold (G68_ _09T_)

Since the VSEN pin of G68_ _09T_ is high impedance,

it can be used to adjust reset threshold. Connect two

resistors in series from the detected power to GND and

the divided voltage is compared to reset threshold

(0.788V typical). (Figure 3)

The voltage threshold is:

788

Vth

)

(

Figure 3

VREF

RESET

(RESET)

OUTPUT

BUFFER

VCC

VREF

RESET

(RESET)

OUTPUT

BUFFER

VCC

VSEN

Detect

Voltage

Internal Resistor Divide Sense Voltage

External Restor Divide Sense Voltage (only G68__09T_)

VREF

RESET

(RESET)

OUTPUT

BUFFER

VCC

VREF

RESET

(RESET)

OUTPUT

BUFFER

VCC

VSEN

Detect

Voltage

Internal Resistor Divide Sense Voltage

External Restor Divide Sense Voltage (only G68__09T_)

*The 100kΩ pull up resistor is only for G683L

VCC

VSEN

GND

RESET

(RESET)

*100kΩ

Detect

Voltage

*The 100kΩ pull up resistor is only for G683L

VCC

VSEN

GND

RESET

(RESET)

*100kΩ

Detect

Voltage

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