M21418/M21428

M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice.

Visit www.macom.com for additional data sheets and product information.

For further information and support please visit:

http://www.macom.com/support

7

HD/SD and 3G/HD/SD-SDI Cable Drivers

Rev V6

1.2

Pin Definitions

1.2.1

High-speed Inputs

The M21418/M21428 are designed to be operated with input signals as low as 100 mV or up to 2000 mV

differential peak to peak. The M21418/M21428 uses external 50

 input termination resistors to match 100 

differential impedance transmission lines for improved system level performance. The M21418/M21428

recommended input circuits are shown in Figure 1-1.

Note that AC-coupling is not required when the M21418/M21428 are driven by MACOM Broadcast video devices.

Figure 1-1.

Typical Input Circuit—AC-coupled

M21418

M21428

Tx Device

DDI

DDI

DDO

DDO

100



Figure 1-2.

Typical Input Circuit—DC-coupled

M21418

M21428

Tx Device

PCML Output Stage Connected to

DDI

DDI

DDO

DDO

100

