m21328g Mindspeed Technologies, m21328g Datasheet - Page 6

• Manufacturer Part Number: m21328g
• Description: M21328 Hd/sd And 2xhd-sdi Cable Driver
• Manufacturer: Mindspeed Technologies

1.1
1.1.1
The output slew rate of the M21328 is selectable to conform with the different SD-SDI, HD-SDI, and 2xHD
specifications. With SD/HD = Low, rise/fall time is typically 100 ps. The slew rate will vary depending on the output
matching network and connector used.
With SD/HD = High, for standard definition (143 to 540 Mbps) applications, the rise/fall time is typically 600 ps,
which is compliant with SMPE 259M and SMPTE 344M.
1.1.2
A resistor connected to RSET pin is used to set the single ended output amplitude swing.
For SMPTE compliance, an external 750Ω
800mV within a tolerance that is less than
be adjusted to range from 500 to 1600 mVpp single ended using the following formula:
The actual swing is set as a function of the IC supply voltage, the external termination voltage and the limitations
are shown in
additional gain of up to 1600 mVpp swings, so the output after the lossy network can be SMPTE compliant.
Table 1-1.
21328-DSH-001-D
Output Swing = (600/RSET) [RSET in kΩ] (in mVpp, Single Ended)
AV
3.3V
3.3V
DD
Table
Output Swing vs. Supply and Termination Voltage
(V)
Features
HD-SDI and SD-SDI Slew-rate Selection
Output Amplitude Adjustment
1-1. In applications where a lossy matching or splitting networks are used, the M21328 offers
1.0 Functional Description
AV
Mindspeed Proprietary and Confidential
Mindspeed Technologies
DDTERM
3.3V
5.0V
±
10% which meets SMPTE requirements. The output amplitude can also
±
1% resistor at RSET to A
(V)
(Single-ended mVp–p)
Maximum Swing
®
1200 mV
1600 mV
VDD
is recommended for a swing level of
(Single-ended mVp–p)
Minimum Swing
500 mV
500 mV
1