3G/HD/SD-SDI Cable Driver

The M21328 is a high-speed, low-power, low-jitter cable driver. It is designed to drive serial digital video data through 75O coaxial cable typically used in SMPTE and DVB-ASI video applications. The M21328 cable driver is optimized for performance from 143 Mbps up to 2970 Mbps. It has selectable slew rates for SD-SDI and HD-SDI applications. The typical output rise/fall time of the M21328 is 100 ps for HD and 3G rates. It has 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 750O ±1% resistor. The M21328 supports a maximum single-ended output swing of 1600 mVpp, when configured appropriately. The M21328 device is packaged in a new high-performance 4x4 mm MLF package to simplify the PCB and reduce package parasitics with resulting improvements in Output Return Loss (ORL). It is available in an RoHS compliant package that is backwards compatible with standard JEDEC SnPb processes. The M21328 is pin-compatible with the GS1578/1578A while supporting a 2.97 Gbps data rate and up to 1600 mV high output swing. It also fits into the footprints for GS9078/9078A or GS2978. It also supports both 2.5 V and 3.3 V operation.

Product Specifications

Part Number
3G/HD/SD-SDI Cable Driver
Max Data Rate(Gbps)
Supply Voltage
Package Size
Power Consumption(Watts)


  • 2xHD, HD and SD operation
  • Output disable
  • RoHS package
  • Extended temp. range: -10 to 85°C
  • Low PDISS (144 mW @ 3.3V)
  • 3.3 V Supply
  • SD/HD slew rate control
  • 1600 mVpp maximum single-ended output swing
  • 800 mVpp single-ended output swing (typical)

Technical Resources

Data Sheet

Application Notes

Order from MACOM

EVM for M21328 Cable Driver
M21328G-12 Distributors