# GF2140 Linear Integrated Circuit

## Low Power Two-Wire Ground Fault Interrupter

Description
· Low power controller for AC appliance leakage current interrupters.
· Detects hazardous current paths to ground and triggers SCR for protection.

Features
· Powered from AC line.
· Built-in bridge rectifier.
· SCR interface.
· Adjustable trip current & time delay.
· Minimal external components.
· For two-wire systems.
· Compatible with 110V or 220V systems.

Ordering Information
· GF2140-S08-R: Normal, SOP-8, Tape Reel
· GF2140L-S08-R: Lead-free, SOP-8, Tape Reel
· GF2140G-S08-R: Halogen-free, SOP-8, Tape Reel
· GF2140-S08-T: Normal, SOP-8, Tube
· GF2140L-S08-T: Lead-free, SOP-8, Tube
· GF2140G-S08-T: Halogen-free, SOP-8, Tube

Pin Connections
· Pin 1 (Rsct): Output of Leakage current first.
· Pin 2 (VFB): Input of leakage current.
· Pin 3 (VREF): Reference voltage.
· Pin 4 (GND): Ground.
· Pin 5 (Line): Line input.
· Pin 6 (Neutral): Neutral input.
· Pin 7 (SCR Trigger): SCR Trigger.
· Pin 8 (C Delay): Delay Time Output.

Electrical Characteristics (TA = 25°C, RSET = 290kΩ)
· Shunt Regulator (Pin 5-4): VREG (I2-3=11μA): 6.1-7.5V, VREG(ILINE=700μA, I2-3=9μA): 6.1-7.5V
· Sense Amplifier (Pin 2-3): Offset Voltage (VOFF): -3.0 to +3.0mV, Input Bias Current (II(BIAS)): 15-30nA, Gain Bandwidth (fT): 3.44 MHz.
· SCR Trigger (Pin 7-6): VOUT (I2-3=9μA): 0-10mV, VOUT (I2-3=11μA): 1.4-2.6V, IOUT (V7-6=0V, I2-3=11μA): 300-600μA, Output Resistance (ZO): 4.0-5.4 KΩ.
· Reference Voltage (Pin 3-4): VREF (ILINE=700μA): 2.6-3.4V.
· Delay Time (Pin 8-4): Delay Current (ID) (I2-3=11μA): 23-43μA, Delay Time (tD) (C8-4=20nF): 2.0ms.