sm5304a Seiko NPC Corp., sm5304a Datasheet - Page 7

• Manufacturer Part Number: sm5304a
• Description: 1-channel Video Buffer
• Manufacturer: Seiko NPC Corp.

Gain Control Function and Enable Function
When setting GSEL pin to open, in order to prevent incorrect operation by the external noise, it recommends connecting a capacitor between GSEL pin
and GND pin.
Equivalent circuit
The equivalent circuit of GSEL pin and ENABLE pin is shown in figure. GSEL pin is connected only to pull-
down resistor in the state of disable.
ENABLE pin
(Disable)
(Enable)
HIGH
LOW
GSEL pin
Open
HIGH
Open
HIGH
LOW
LOW
ENABLE
GSEL
High impedance output
SM5304AV
Gain setting
12dB
6dB
0dB
decoder
3-level
SEIKO NPC CORPORATION —7