Document Number: 001-12875 Rev. ** Page 3 of 9
Table 1. Pin Descriptions - CYV270M0104EQ Adaptive Video Cable Equalizer
Name IO Characteristics Signal Description
Control Signals
MUTE LVTTL Input Mute. When the MUTE pin is set LOW, the equalizer’s differential serial outputs are not
muted.
When the MUTE pin is set HIGH, the equalizer’s differential serial outputs are muted. The
BYPASS setting is ignored when MUTE is HIGH.
Connecting CD
to the MUTE pin enables automatic muting of the equalizer when the signal
is lost.
Do not leave an unused MUTE pin floating. Always drive it to a known state.
CD LVTTL Output Carrier Detect. When the incoming data stream is present and maximum cable length set
by MCLADJ is not exceeded, CD
outputs a voltage less than 0.8V.
When the incoming data stream is not present or maximum cable length set by MCLADJ
is exceeded, CD
outputs a voltage greater than 2.8V.
Connecting CD
to the MUTE pin enables automatic muting of the equalizer when the signal
is lost.
MCLADJ Analog Input Maximum Cable Length Adjust. The maximum cable length to equalize is set by the
voltage applied to the MCLADJ input. When the maximum cable length set by MCLADJ is
reached, the CD
indicator deasserts.
If MCLADJ functionality is not required, then this pin should be left floating or tied to ground
to allow maximum equalized cable length.
BYPASS LVTTL Input Equalizer Bypass. When BYPASS is set HIGH, the signal presented at the equalizer’s
differential serial inputs (SDI, SDI
) is routed to the equalizer’s differential serial outputs
(SDO, SDO
) without performing equalization.
When BYPASS is set LOW, the incoming video data stream is equalized and presented
at the equalizer‘s serial differential outputs (SDO, SDO
).
When MUTE is set HIGH, the BYPASS setting is ignored and the serial outputs are muted.
AGC, AGC Analog Automatic Gain Control. Place a 1 μF capacitor between the AGC and AGC pins.
SDO, SDO Differential
Output
Differential Serial Outputs. The equalized serial video data stream is presented at the
SDO/SDO
differential serial CML output.
SDI, SDI Differential
Input
Differential Serial Inputs. SDI/SDI accepts either a single-ended or differential serial
video data stream over 75Ω coaxial cable.
Power
VCC Power Power Supply for Device. Connect to +3.3V DC.
GND Gnd Connect to Ground.
Center Pad – Connect to PCB Ground for Maximum Thermal Dissipation.
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