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Texas Instruments 3G-SDI Cable Equalizer Compatibility – TI / MACOM Application notes
Application Report
SNLA282 – September 2017
3G-SDI Cable Equalizer Compatibility Guide – TI / MACOM
ABSTRACT
To facilitate design with TI’s 3G-SDI portfolio, this guide provides a detailed description about cable
equalizer devices that are drop-in compatible replacements for similar MACOM cable equalizers. In
addition, this guide provides details about 3G-SDI cable equalizer part selection for new designs to enable
improved performance and an easy future upgrade path from 3G to 12G.
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Contents
Introduction ...................................................................................................................
Cable Equalizer Compatibility Overview ..................................................................................
LMH0384, LMH0344 Pin Compatibility With M21324 ...................................................................
LMH0394 Pin Compatibility With M21564, M21664, M31564 .........................................................
LMH0395 Pin Compatibility With M21544, M21644, M31544 .........................................................
LMH0324 3G-SDI Cable Equalizer for New Designs ...................................................................
Summary ......................................................................................................................
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9
9
Trademarks
All trademarks are the property of their respective owners.
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1
Introduction
1
www.ti.com
Introduction
TI offers a diverse 3G-SDI portfolio that includes cable equalizers, reclockers, and cable drivers. Many of
these 3G-SDI devices are pin-compatible or functional equivalent replacement options with devices
offered by other SDI IC vendors. This guide serves as a pin-by-pin reference with a detailed comparison of
TI’s 3G cable equalizers and similar cable equalizer devices offered by MACOM.
2
Cable Equalizer Compatibility Overview
These TI devices are pin-compatible with the following MACOM cable equalizers:
2
TI CABLE EQ
PIN-COMPATIBLE WITH...
DEVICE DETAILS
LMH0384
LMH0344
M21324
Single Output EQ
16-Pin QFN
4 mm × 4 mm
LMH0394
M21564, M21664, M31564
Single Output EQ
16-Pin QFN
4 mm × 4 mm
LMH0395
M21544, M21644, M31544
Dual Output EQ
24-Pin QFN
4 mm × 4 mm
3G-SDI Cable Equalizer Compatibility Guide – TI / MACOM
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LMH0384, LMH0344 Pin Compatibility With M21324
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3
LMH0384, LMH0344 Pin Compatibility With M21324
3.1
Key Schematic Differences
Figure 1 highlights key schematic differences between TI and MACOM drop-in compatible solutions in
blue. For a detailed comparison of device pin functionality, refer to Section 3.2.
Pull low to VSS
LMH0384: AUTO SLEEP
LMH0344: VEE
AVSS
Leave as no-connect
N/C
MUTE
Output Only
SD/MUTE
11
EP = VSS
Differential
Output
4.7 PF
4
9
13
10
EP = VSS
Differential
Output
9
5
37.4
8
7
75
6
14
M21324
3
37.4
5
11
2
8.2 nH
1.0 PF
4
75
4.7 PF
75
10
12
1
Coax Cable
8
12
2
LMH0384
LMH0344
0.1 PF
15
13
14
15
16
1
3
5.6 nH
0.1 PF
0.1 PF
1.0 PF
75
VCC
7
0.1 PF
Coax Cable
VCC
VCC
6
VCC
16
CD
1.0 PF
1.0 PF
EQ_BYP
BYPASS
MUTEREF levels are different
THRESH
MUTE REF
Figure 1. LMH0384, LMH0344 Pin Compatibility With M21324
3.2
(1)
Pin-By-Pin Comparison
PIN NO.
LMH0384 (1)
LMH0344
M21324
1, DAP
VEE
AVSS
None
2,
3
SDI,
SDI
SDI,
SDI
None
4
LMH0384: SPI_EN
LMH0344: VEE
AVSS
LMH0384: Pull to VEE for compatibility.
5,
6
AEC+,
AEC–
AGC,
AGC
None. 1-µF integration cap required
7
BYPASS
EQ_BYP
LMH0344: External pulldown required to disable bypass function.
8
MUTEREF
THRESH
LMH0384/44: Leave as no connect for maximum cable reach.
See LMH0384/LMH0344 data sheet for specific threshold levels.
9
VEE
AVSS
None
10,
11
SDO,
SDO
SDO,
SDO
None
12
LMH0384: AUTO SLEEP
LMH0344: VEE
AVSS
LMH0384: Automatic Power Down in case of carrier loss. For
compatibility, pull this pin low to disable automatic power down.
13
VCC
AVDD
None. 3.3-V Supply
14
MUTE
N/C
None
15
CD
SD/MUTE
None
16
VCC
AVDD
FUNCTIONAL DIFFERENCES AND NOTES
None. 3.3-V Supply
LMH0384 pin descriptions in this table are shown for Pin Mode only. Although the TI LMH0384 also supports a programmable SPI Mode,
the MACOM M21324 only supports Pin Mode operation.
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LMH0384, LMH0344 Pin Compatibility With M21324
3.3
www.ti.com
External Component Differences
To replace the M21324, the following external component changes should be observed regarding the
LMH0384/44:
COMPONENT(S)
MUTEREF Resistor Network
4
CHANGE FROM...
CHANGE TO...
Leave as no connect for maximum cable reach.
See LMH0384/LMH0344 data sheet for specific threshold levels.
AC Coupling Capacitors
4.7 μF
1.0 μF
Return Loss Inductor
6.2 nH
5.6 nH
3G-SDI Cable Equalizer Compatibility Guide – TI / MACOM
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LMH0394 Pin Compatibility With M21564, M21664, M31564
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4
LMH0394 Pin Compatibility With M21564, M21664, M31564
4.1
Key Schematic Differences
Figure 2 and Figure 3 highlight key schematic differences between TI and MACOM drop-in compatible
solutions in blue. For a detailed comparison of device pin functionality, refer to Section 4.2.
Pin Mode (Hardware Mode)
AUTO SLEEP
MF1 (Automatic Sleep)
MUTE
MF2 (MUTE)
MF3 (xSD)
CD
0.1 PF
10
3
1.0 PF
4
Differential
Output
5.6 nH
14
13
10
EP = VSS
Differential
Output
9
5
37.4
8
7
37.4
6
1.0 PF
4
9
11
M21564
M21664
M31564
3
75
5
75
EP = VSS
2
No external cap
required
8
11
LMH0394
5.6 nH
1.0 PF
75
2
12
1
Coax Cable
12
1
0.1 PF
16
13
14
15
16
0.1 PF
1.0 PF
75
VCC
15
0.1 PF
Coax Cable
VCC
VCC
7
VCC
6
4.1.1
33 nF
MF0 (BYPASS)
BYPASS
MUTEREF levels are different
MUTEREF
MUTE REF
Figure 2. LMH0394 Pin Compatibility With M21564, M21664, M31564, Pin/Hardware Mode
SPI Mode (Software Mode)
MISO
MF1 (MISO)
SCK
MF2 (SCK)
MOSI
MF3 (MOSI)
2
Differential
Output
4
EP = VSS
4
8
7
6
5
75
VCC
1.0 PF
9
13
11
M21564
M21664
M31564
3
5.6 nH
1.0 PF
37.4
14
1.0 PF
75
10
12
1
Coax Cable
10
EP = VSS
Differential
Output
9
37.4
VCC
8
11
7
12
2
LMH0394
75
0.1 PF
16
13
14
15
16
1
3
5.6 nH
0.1 PF
0.1 PF
1.0 PF
75
VCC
15
0.1 PF
Coax Cable
VCC
VCC
6
VCC
5
4.1.2
No external cap
required
33 nF
CD
MF0 (Signal Detect)
MUTEREF levels are different
MUTE REF
MUTEREF
SS
SS
Figure 3. LMH0394 Pin Compatibility With M21564, M21664, M31564, SPI/Software Mode
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LMH0394 Pin Compatibility With M21564, M21664, M31564
4.2
Pin-by-Pin Comparison
PIN NO.
(1)
www.ti.com
M21564
M21664
M31564
LMH0394 (1)
FUNCTIONAL DIFFERENCES AND NOTES
1, DAP
VEE
VEE
None
2,
3
SDI,
SDI
SDIP,
SDIN
None
4
SPI_EN
MODE_SEL
None.
For comparison purposes, Pin Mode (TI) and Hardware Mode
(MACOM) are identical terms. SPI Mode (TI) and Software Mode
(MACOM) are also identical.
5,
6
AEC+,
AEC–
AGC+,
AGC–
LMH0394: Optional 1-μF integration capacitor (not required)
M21564, M21664, M31564: 33-nF integration capacitor required
7
BYPASS (Pin Mode)
CD (SPI Mode)
MF0
8
MUTEREF
MUTEREF
LMH0394: Leave as no connect for maximum cable reach. See
LMH0394 data sheet for specific threshold levels.
9
VEE (Pin Mode)
SS (SPI Mode)
xCS
None.
In Hardware Mode (MODE_SEL = 0), xCS must be tied to GND.
In Software Mode (MODE_SEL = 1), xCS is the Chip Select
complement pin.
10,
11
SDO,
SDO
SDON,
SDOP
12
AUTO SLEEP (Pin Mode)
MISO (SPI Mode)
MF1
None.
In Hardware Mode (MODE_SEL = 0), MF1 functions as an AUTO
SLEEP pin. In Software Mode (MODE_SEL = 1), MF1 functions
as a MISO pin.
13
VCC
VCC
None. 2.5-V Supply
14
MUTE (Pin Mode)
SCK (SPI Mode)
MF2
None.
In Hardware Mode (MODE_SEL = 0), MF2 functions as a MUTE
pin. In Software Mode (MODE_SEL = 1), MF2 functions as a
SCK pin.
15
CD (Pin Mode)
MOSI (SPI Mode)
MF3
None.
In Hardware Mode (MODE_SEL = 0), MF3 functions as an xSD
signal detect pin. In Software Mode (MODE_SEL = 1), MF3
functions as a MOSI pin.
16
VCC
VCC
None. 2.5-V Supply
None.
In Hardware Mode (MODE_SEL = 0), MF0 functions as a
BYPASS pin. In Software Mode (MODE_SEL = 1), MF0 functions
as a CD pin.
None
LMH0394 Pin Mode is equivalent to M21564/M21664/M31564 Hardware Mode, and LMH0394 SPI Mode is equivalent to
M21564/M21664/M31564 Software Mode.
4.3
External Component Differences
To replace the M21564/M21664/M31564, the following external component changes should be observed
regarding the LMH0394:
COMPONENT(S)
CHANGE FROM...
MUTEREF Resistor Network
External Integration Capacitor
6
CHANGE TO...
Leave as no connect for maximum cable reach.
See LMH0394 data sheet for specific threshold levels.
33 nF
3G-SDI Cable Equalizer Compatibility Guide – TI / MACOM
Copyright © 2017, Texas Instruments Incorporated
No external cap required.
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LMH0395 Pin Compatibility With M21544, M21644, M31544
www.ti.com
5
LMH0395 Pin Compatibility With M21544, M21644, M31544
5.1
Key Schematic Differences
Figure 4 and Figure 5 highlight key schematic differences between TI and MACOM drop-in compatible
solutions in blue. For a detailed comparison of device pin functionality, refer to Section 5.2.
5.1.1
Pin Mode (Hardware Mode)
MF1 (Automatic Sleep)
AUTO SLEEP
VCC
MUTE
VCC
MF2 (MUTE)
CD
MF3 (xSD)
VCC
VCC
0.1 PF
0.1 PF
0.1 PF
Coax Cable
1
18
2
17
SDO1
Differential Output
1.0 PF
75
0.1 PF
Coax Cable
18
2
17
M21544
M21644
M31544
3
16
LMH0395
5.6 nH
75
4
15
5
14
1.0 PF
37.4
5.6 nH
37.4
6
14
EP = VSS
SDO0
Differential Output
13
33 nF
SDO1_DISABLE
No external cap
required
15
1.0 PF
13
SDO1_DISABLE
16
5
75
EP = VSS
6
4
SDO0
Differential Output
SDO1
Differential Output
1.0 PF
75
3
1
MF0 (BYPASS)
BYPASS
MUTEREF levels are different
MUTEREF
MUTE REF
Figure 4. LMH0395 Pin Compatibility With M21544, M21644, M31544, Pin/Hardware Mode
5.1.2
SPI Mode (Software Mode)
MISO
MF1 (MISO)
VCC
SCK
VCC
MF2 (SCK)
MOSI
MF3 (MOSI)
VCC
VCC
0.1 PF
0.1 PF
Coax Cable
0.1 PF
1
18
2
17
SDO1
Differential Output
1.0 PF
75
0.1 PF
Coax Cable
18
2
17
16
M21544
M21644
M31544
3
LMH0395
5.6 nH
75
4
15
5
14
1.0 PF
37.4
EP = VSS
6
SDO0
Differential Output
SDO1
Differential Output
1.0 PF
75
3
1
4
5.6 nH
37.4
13
6
VCC
15
1.0 PF
5
75
16
14
EP = VSS
SDO0
Differential Output
13
VCC
SDO1_DISABLE
SDO1_DISABLE
33 nF
No external cap
required
CD
MF0 (Signal Detect)
MUTEREF levels are different
MUTE REF
MUTEREF
SS
SS
Figure 5. LMH0395 Pin Compatibility With M21544, M21644, M31544, SPI/Software Mode
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LMH0395 Pin Compatibility With M21544, M21644, M31544
5.2
(1)
www.ti.com
Pin-By-Pin Comparison
PIN NO.
LMH0395 (1)
M21544
M21644
M31544
1, DAP
VEE
VEE
None
2
VEE
VEE
None
3,
4
SDI,
SDI
SDIP,
SDIN
None
5
VEE
VEE
None
6
SPI_EN
MODE_SEL
FUNCTIONAL DIFFERENCES AND NOTES
None.
For comparison purposes, Pin Mode (TI) and Hardware Mode
(MACOM) are identical terms. SPI Mode (TI) and Software Mode
(MACOM) are also identical.
7
SDO1_DISABLE
SDO1_DISABLE
8,
9
AEC+,
AEC–
AGC+,
AGC–
None
10
BYPASS (Pin Mode)
CD (SPI Mode)
MF0
11
MUTEREF
MUTEREF
12
VEE
VEE
None
13
VEE (Pin Mode)
SS (SPI Mode)
xCS
None.
In Hardware Mode (MODE_SEL = 0), xCS must be tied to GND. In
Software Mode (MODE_SEL = 1), xCS is the Chip Select
complement pin.
14,
15
SDO0,
SDO0
SDO0N,
SDO0P
None
16
VEE
VEE
None
17,
18
SDO1,
SDO1
SDO1N,
SDO1P
None
19
AUTO SLEEP (Pin Mode)
MISO (SPI Mode)
MF1
None.
In Hardware Mode (MODE_SEL = 0), MF1 functions as an AUTO
SLEEP pin. In Software Mode (MODE_SEL = 1), MF1 functions as a
MISO pin.
20
VCC
VCC
None. 2.5-V Supply
21
MUTE (Pin Mode)
SCK (SPI Mode)
MF2
None.
In Hardware Mode (MODE_SEL = 0), MF2 functions as a MUTE pin.
In Software Mode (MODE_SEL = 1), MF2 functions as a SCK pin.
22
CD (Pin Mode)
MOSI (SPI Mode)
MF3
None.
In Hardware Mode (MODE_SEL = 0), MF3 functions as an xSD
signal detect pin. In Software Mode (MODE_SEL = 1), MF3 functions
as a MOSI pin.
23
VEE
VEE
None
24
VCC
VCC
None. 2.5-V Supply
LMH0395: Optional 1-μF integration capacitor (not required)
M21544, M21644, M31544: 33-nF integration capacitor required
None.
In Hardware Mode (MODE_SEL = 0), MF0 functions as a BYPASS
pin. In Software Mode (MODE_SEL = 1), MF0 functions as a CD pin.
LMH0395: Leave as no connect for maximum cable reach. See
LMH0395 data sheet for specific threshold levels.
LMH0395 Pin Mode is equivalent to M21544/M21644/M31544 Hardware Mode, and LMH0395 SPI Mode is equivalent to
M21544/M21644/M31544 Software Mode.
5.3
External Component Differences
To replace the M21544/M21644/M31544, the following external component changes should be observed
regarding the LMH0395:
COMPONENT(S)
CHANGE FROM...
MUTEREF Resistor Network
External Integration Capacitor
8
CHANGE TO...
Leave as no connect for maximum cable reach.
See LMH0395 data sheet for specific threshold levels.
33 nF
3G-SDI Cable Equalizer Compatibility Guide – TI / MACOM
Copyright © 2017, Texas Instruments Incorporated
No external cap required.
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LMH0324 3G-SDI Cable Equalizer for New Designs
www.ti.com
6
LMH0324 3G-SDI Cable Equalizer for New Designs
For new 3G-SDI designs in the component-selection phase, TI recommends designing with the LMH0324.
Using the LMH0324 enables an easy upgrade path to the LMH1219, a pin-compatible 12G-SDI cable
equalizer with integrated reclocker. In addition, the LMH0324 offers lower power dissipation and improved
cable reach compared to previous generation 3G-SDI cable equalizers, as shown in Table 1.
Table 1. Belden 1694A Cable Reach Performance Comparison
FEATURES
LMH0324
LMH0395
M21644
3G Cable Reach, B1694A (m)
200
200
200
HD Cable Reach, B1694A (m)
280
220
200
SD Cable Reach, B1694A (m)
600
400
400
NOTE: The LMH0324 is not pin-compatible with the previously mentioned 3G-SDI devices
(LMH0344, LMH0384, LMH0394, LMH0395).
Other advantages of the LMH0324 include the following:
• Lowest Power: 78 mW Typical
• Integrated Input and Output Terminations
• Integrated Return Loss Network
• Dual Output PCB Trace Drivers
• SMBus or SPI Control Programmability
For more information, visit the LMH0324 product folder to request access to the full data sheet and other
design documents.
7
Summary
TI offers a wide SDI portfolio with pin-compatible alternatives to MACOM 3G-SDI cable equalizer devices.
With a few simple component changes to an existing SDI design and board layout, a MACOM 3G-SDI
single or dual output cable equalizer can be replaced and improved with TI’s pin-compatible 3G-SDI cable
equalizers. For new 3G designs that are in the component selection phase, TI recommends the LMH0324
for improved performance and easy upgrade path to 12G.
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