M21418_15 Datasheet, PDF (1/22 Pages) M/A-COM Technology Solutions, Inc. – HD/SD and 3G/HD/SD-SDI Cable Drivers

M21418/M21428
HD/SD and 3G/HD/SD-SDI Cable Drivers
Rev V6
Applications
• Serial Routing Switchers,
• Production/Master Control Switchers
• Distribution Amplifiers
• Video Tape Recorders, ENG Edit decks, Cameras
• Broadcast video applications
• NLE's, MPEG Encoders/Decoders, format convertors etc. 
Standards Compliance
• SMPTE 292M, 259M, 344M, 424M
(only M21428 complies with 424M)
• DVB-ASI
Features
• 3G, HD and SD operation (M21428),
• HD and SD operation (M21418)
• Dual Differential outputs, with individual mute control
• 800 mVp–p single ended output swing (typical)
• 1600 mVp–p maximum single ended output swing
• SD/HD Slew Rate control
• 2.5 V or 3.3 V Supply
• Low P_DISS (122 mW @ 2.5 V, 144 mW @ 3.3 V)
• Extended temp. range: -10 to 85 °C
• RoHS package
The M21418 and M21428 are high-speed, low-power, low-jitter cable drivers. They are designed to drive serial
digital video data through 75  coaxial cable typically used in SMPTE and DVB-ASI video applications. The
M21428 cable driver is optimized for performance from 143 Mbps up to 2970 Mbps, the M21418 cable driver is
optimized for performance from 143 Mbps up to 1485 Mbps. Both the M21428 and M21418 have selectable slew
rates for SD-SDI and HD-SDI applications.
The typical output rise/fall time of the M21428 is 100 ps for HD and 3G rates, the typical output rise/fall time of the
M21418 is 100 ps for HD rates. All devices have a typical set slew rate of 600 ps at SD rates. The default output
voltage swing is compliant with SMPTE 292M, 259M, 344M and 424M using a 750  ±1% resistor. The M21418
and M21428 are pin compatible. The M21418/M21428 support a maximum single ended output swing of 1600
mVp–p, when configured appropriately.
All devices are packaged in a new high performance 3x3 mm MLF package to simplify the PCB and reduce
package parasitics with resulting improvements in Output Return Loss (ORL). Both devices are available in an
RoHS compliant package, that is backwards compatible with standard JEDEC SnPb processes.
Functional Block Diagram
AV_DD
2.5V – 3.3V and
BIAS CIRCUITRY
DDI
INPUT
BUFFER
DDI
OUTPUT
BUFFER
SDO1
SDO1
SD/HD
MUTE1
MUTE2
CONTROL
LOGIC
M21418/M21428
CABLE DRIVER
OUTPUT
BUFFER
SDO2
SDO2
RSET
1
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