GS2978CNE3 GENNUM, GS2978CNE3 Datasheet - Page 9
GS2978CNE3
Manufacturer Part Number
GS2978CNE3
Description
IC SLEW RATE CABLE DRIVER 2.97GBPS QFN16
Manufacturer
GENNUM
Datasheet
1.GS2978CNE3.pdf
(14 pages)
Specifications of GS2978CNE3
Supply Voltage Range
3.135V To 3.465V
Operating Temperature Range
0°C To +70°C
Digital Ic Case Style
QFN
No. Of Pins
16
Termination Type
SMD
Control Interface
Serial
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
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ROHM
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Manufacturer:
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Quantity:
20 000
4.2.1 Output Amplitude (RSET)
4.2.2 Output Disable
4.3 Output Return Loss Measurement
The output amplitude of the GS2978 can be adjusted by changing the value of the
R
tolerance, a value of 750Ω is required. A ±1% SMT resistor should be used.
The R
resistor should be placed as close as possible to the R
capacitance should be minimized at this node by removing the PCB groundplane
beneath the R
Table 4-1: R
The serial output disable (DISABLE), disables power to the current mode serial
digital output driver. When asserted LOW, the SDO/SDO output driver is powered
off. SDO/SDO will float to V
To perform a practical return loss measurement, it is necessary to force the
GS2978 output to a DC high or low condition. The actual measured return loss will
be based on the outputs being static at V
conditions the outputs of the device swing between V
37186 - 5
NOTE: For reliable operation of the GS2978 over the full temperature range, do not use an R
value below 573Ω.
SET
resistor as shown in
SET
resistor is part of the high speed output circuit of the GS2978. The
October 2007
SET
SET
R
SET
vs V
resistor and the R
995
824
750
680
573
R (Ω)
OD
Table
CC
through the pull-up resistor.
4-1. For an 800mV
SET
pin.
CC
or V
CC
Output Swing (mVp-p)
-1.6V. Under normal operating
p-p
SET
CC
output with a nominal ±7%
GS2978 Data Sheet
-0.4V and V
pin. In addition, the PCB
1040
608
734
800
884
CC
-1.2V.
9 of 14
SET