LMH0344 반도체 회로 부품 판매점
3Gbps HD/SD SDI Adaptive Cable Equalizer
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 National Semiconductor |
PRELIMINARY
April 2007
LMH0344
3Gbps HD/SD SDI Adaptive Cable Equalizer
General Description
The LMH0344 3Gbps HD/SD SDI Adaptive Cable Equalizer
is designed to equalize data transmitted over cable (or any
media with similar dispersive loss characteristics). The equal-
izer operates over a wide range of data rates from 143 Mbps
to 2.97 Gbps and supports SMPTE 424M, SMPTE 292M,
SMPTE 344M, and SMPTE 259M.
The LMH0344 implements DC restoration to correctly handle
pathological data conditions. The equalizer may be driven in
either a single ended or differential configuration.
Additional features include separate carrier detect and output
mute pins which may be tied together to mute the output when
no signal is present. A programmable mute reference is pro-
vided to mute the output at a selectable level of signal degra-
dation.
Features
■ SMPTE 424M, SMPTE 292M, SMPTE 344M, and SMPTE
259M compliant
■ Supports DVB-ASI at 270 Mbps
■ High data rates: 143 Mbps to 2.97 Gbps
■ Equalizes up to 120 meters of Belden 1694A at 2.97 Gbps,
up to 140 meters of Belden 1694A at 1.485 Gbps, or up to
350 meters of Belden 1694A at 270 Mbps
■ Equalizes 0-100m of Belden 1694A at 2.97 Gbps with
0.3 UI maximum output jitter
■ Manual bypass and output mute with a programmable
threshold
■ Single-ended or differential input
■ 50Ω differential outputs
■ Single 3.3V supply operation
■ 280mW typical power consumption with 3.3V supply
■ Footprint compatible with the LMH0044
■ Replaces the Gennum GS2974 or GS2974A
Applications
■ SMPTE 424M, SMPTE 292M, SMPTE 344M, and SMPTE
259M serial digital interfaces
■ Serial digital data equalization and reception
■ Data recovery equalization
Typical Application
© 2007 National Semiconductor Corporation 201990
20199001
www.national.com
Absolute Maximum Ratings (Note 1)
Supply Voltage
Input Voltage (all inputs)
Storage Temperature Range
Junction Temperature
Lead Temperature
(Soldering 4 Sec)
Package Thermal Resistance
θJA 16-pin LLP
θJC 16-pin LLP
ESD Rating (HBM)
ESD Rating (MM)
−0.5V to 3.6V
−0.3V to VCC+0.3V
−65°C to +150°C
+150°C
+260°C
+43°C/W
+8°C/W
8kV
250V
Recommended Operating
Conditions
Supply Voltage (VCC – VEE)
Input Coupling Capacitance
AEC Capacitor (Connected between
AEC+ and AEC-)
Operating Free Air Temperature (TA)
3.3V ±5%
1.0 µF
1.0 µF
0°C to +85°C
DC Electrical Characteristics
Over Supply Voltage and Operating Temperature ranges, unless otherwise specified (Notes 2, 3).
Symbol Parameter
Conditions
Reference
Min Typ Max Units
VCMIN
VSDI
VCMOUT
Input Common Mode Voltage
Input Voltage Swing
Output Common Mode Voltage
SDI, SDI
At LMH0344 input, (Notes 4, 5)
SDO, SDO
VSDO
Output Voltage Swing
MUTEREF DC Voltage (floating)
MUTEREF Range
CD Output Voltage
50Ω load, differential
Carrier not present
MUTEREF
CD
1.9 V
720 800 950 mVP−P
VCC –
VSDO/2
V
750 mVP-P
1.3 V
0.7 V
2.4 V
Carrier present
0.4 V
MUTE Input Voltage
Min to mute outputs
MUTE
2.0
V
Max to force outputs active
0.8 V
ICC Supply Current
85 mA
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국내 전력반도체 판매점
상호 : 아이지 인터내셔날
전화번호 : 051-319-2877
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전력반도체 문의 : 010-3582-2743
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