GL3820 GL3820 Pin configuration Description This integrated circuit provides all video switching allowing connections between the peri TV plug and video sections in the TV set. 75Ω 2 VIDEO OUTPUT Features • 1 Video Output 75Ù– 1 VPP No Switched • 1 Switched Video Output 2 VPP • Video Cross Talk : 50 dB Typical • Short Circuit Protection of Inputs and Outputs • Clamped Video Inputs Maximum Ratings RATING INTERNAL VIDEO INPUT SYMBOL Supply Voltage Operating Temperature with Load > 150Ω with Load = 75Ω Junction Temperature Vcc Topr Storage Temperature Minimum DC Load Resistor P6 Minimum DC Load Resistor P2 Tstg VCC 7 VCC GL6850 3 6 SWITCHED VIDEO OUTPUT NC 4 5 SWITCHING INPUT VALUE 18 Tj Typical Application and Test Circuit 8 EXTERNAL GND 1 UNIT V ¡ É -10 to + 100 -10 to + 70 -40 to + 150 ¡ É -40 to + 150 600 75 ¡ É Ω Ω Switching Input . 0 or no connected = Video TV . > 7V = external video 7 5 10kΩ G=2 External Video Input 1 VPP Video Coming from TV 2 VPP 8 Ref. (low impedance) 6 Video 2 VPP 3 600Ω 2mA G=1 2 1 Video 1 VPP 75Ω 75Ω Note : We advice to protect the 75Ω output through a 75Ω resistor for supply voltage upper than 9 V. 1 GL3820 Electrical Characteristics : Ta = + 25¡ É , VCC = 9V (unless otherwise noted) CHARACTERISTIC SYMBO L MIN TYP Supply Voltage Range VCC 8 - 14 V Supply Current (no load on pin 2 and pin 6) ICC - - 20 mA Supply Current (with 75Ω between pin 2-1, with 600Ω between pin 6-1) ICC - 40 - mA Total Power Dissipation with Load Ptot - 450 - mW Internal Video Input Swing from PIF (positive video) - - - 4.5 VPP Internal Video Input Impedance (positive video) - 50 - - kΩ External Video input Swing (positive video) - - - 2 VPP External Video Input Impedance (positive video) - 50 - - kΩ Switched Video Output Swing - - - 4.5 VPP Switched Video Output Dynamic Impedance - - 10 Switched Video DC Output Voltage (sync. Pulse level, note) (600Ω) - 105 1.8 2.2 V Switched Video Band Width (- 1 dB) - 6 - - MHz Switched Video Output Gain Pin 6 – Pin 8 (gain with 600Ω load) Pin 6 – Pin 3 (gain with 600Ω load) - +5 -1 +6 -0.5 +7 0 DB External Video Output swing( with 150Ω load) - - 2 2.2 V External Video Dynamic Output Impedance - - 10 - Ω External Video DC Output Voltage (sync. Pulse level, note) (150Ω) - 1.5 1.8 2.2 V External Video Output Gain (pin 2 – pin3 gain with 150Ω load) - -1.8 -1 -0.4 dB Switching Input Unactive Low Level or Unconnected Pin (TV receiving) - 0 - 3 V Switching Input Active Level (ext. receiving) - 7 - VCC V Switching Input Impedance - 10 - - kÙ Video Rejection between Two Inputs 0 to 5 MHz 1kHz - -50 -50 - - dB Differential Group Delay - - 15 - ns - 2 2 5 - 40 50 - MAX UNIT Ω % Linearity Distortion Luma Chroma Intermodulation Luma - Chroma Supply Voltage Rejection (1 kHz) - dB Note : Use a video signal with a synchro pulse in order to make the clamp work in a correct way (75Ω to the ground and 10ì F in series). 2