LMH0344 Datasheet, PDF (6/15 Pages) Texas Instruments – 3 Gbps HD/SD SDI Adaptive Cable Equalizer

LMH0344
SNLS233L – APRIL 2007 – REVISED APRIL 2013
WQFN Pin
2
3
5
6
7
CS-BGA Ball
C1
D1
E2
E3
D3
Name
SDI
SDI
AEC+
AEC-
BYPASS
8
E4
MUTE_REF
10
D5
SDO
11
C5
SDO
14
B3
MUTE
15
A2
CD
13, 16
DAP, 1, 4, 9,
12
—
A1, A3, A4, B2 V_CC
B1, B4, D2, E5 V_EE
A5, B5, C2, NC
C3, C4, D4, E1
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PIN DESCRIPTIONS
Description
Serial data true input.
Serial data complement input.
AEC loop filter external capacitor (1µF) positive connection.
AEC loop filter external capacitor (1µF) negative connection.
Bypasses equalization and DC restoration when high. No equalization occurs in this
mode.
Mute reference. Sets the threshold for CD and (with CD tied to MUTE) determines the
maximum cable to be equalized before muting. MUTE_REF may be either unconnected
or connected to ground for maximum equalization.
Serial data complement output.
Serial data true output.
Output mute. To disable the mute function and enable the output, MUTE must be tied
to GND or a low level signal. To force the outputs to a muted state, tie to V_CC. CD may
be tied to this pin to inhibit the output when no input signal is present. MUTE has no
function in BYPASS mode.
Carrier detect. CD is high when no signal is present. CD has no function in BYPASS
mode.
Positive power supply (+3.3V).
Negative power supply (ground).
No connect.
BLOCK DIAGRAM
SDI
SDI
Equalizer
Filter
DC
Restoration/
Level Control
Output
Driver
BYPASS
SDO
SDO
Energy
Detect
Energy
Detect
6
Automatic
Equalization
Control
AEC+ AEC-
Carrier
Detect/
Mute
CD
MUTE
MUTE_REF
6
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