BA7664AFV
Technical Note
3/4
www.rohm.com
2009.04 - Rev.A
© 2009 ROHM Co., Ltd. All rights reserved.
●Equivalent circuit
Pin.No Pin name IN OUT Voltage Equivalent circuit Function
1
5
MUTEA
MUTEB
○ ― ―
Mute control terminal
Pin1 MUTEA - “H” = mute on
Pin5 MUTEB - “H” = only
chroma mute on
2 Y
IN
○ ― 2.0V
Signal input terminal
Sync-tip-clamp input for the
composite Y signal.
3 GND ― ― 0V
Ground terminal
4 C
IN
○ ― 2.0V
Signal input terminal
This pin is a chroma signal
input. Input terminal is 20kΩ.
6
7
MIXOUT2
MIXOUT1
― ○
0.9V
0.95V
Signal output terminal
Pin7 is Y/C MIX signal
output terminal.
Power save mode is active
when output is set under
0.2V.
Pin6 is a sag compensator
input.
8 V
CC
― ― 5.0V
Power supply terminal
●Cautions on use
1. Numbers and data in entries are representative design values and are not guaranteed values of the items.
2. Although ROHM is confident that the example application circuit reflects the best possible recommendations, be sure to
verify circuit characteristics for your particular application. Modification of constants for other externally connected circuits
may cause variations in both static and transient characteristics for external components as well as this ROHM IC. Allow
for sufficient margins when determining circuit constants.
3. Absolute maximum ratings
Use of the IC in excess of absolute maximum ratings, such as the applied voltage or operating temperature range
(Topr), may result in IC damage. Assumptions should not be made regarding the state of the IC (short mode or open
mode) when such damage is suffered. A physical safety measure, such as a fuse, should be implemented when using
the IC at times where the absolute maximum ratings may be exceeded.
4. GND potential
Ensure a minimum GND pin potential in all operating conditions. Make sure that no pins are at a voltage below the
GND at any time, regardless of whether it is a transient signal or not.
5. Thermal design
Perform thermal design, in which there are adequate margins, by taking into account the permissible dissipation (Pd)
in actual states of use.
6. Short circuit between terminals and erroneous mounting
Pay attention to the assembly direction of the ICs. Wrong mounting direction or shorts between terminals, GND, or other
components on the circuits, can damage the IC.
7. Operation in strong electromagnetic field
Using the ICs in a strong electromagnetic field can cause operation malfunction.
15k
14k
GND
20k
VCC
Pin7
Pin6
