GS2978CNE3 GENNUM, GS2978CNE3 Datasheet - Page 10
![no-image](/images/no-image-200.jpg)
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
GS2978CNE3
Manufacturer:
ROHM
Quantity:
1 186
Part Number:
GS2978CNE3
Manufacturer:
GENNUM
Quantity:
20 000
5. Application Information
5.1 PCB Layout
5.2 Typical Application Circuit
DIFFERENTIAL
DATA INPUT
NOTE: All resistors in Ohms, capacitors in Farads,
and inductors in Henrys, unless otherwise noted.
10n
4u7
4u7
DISABLE
SD/HD
49.9
49.9
VCC
Special attention must be paid to component layout when designing serial digital
interfaces for HDTV.
An FR-4 dielectric can be used, however, controlled impedance transmission lines
are required for PCB traces longer than approximately 1cm. Note the following
PCB artwork features used to optimize performance:
•
•
•
•
Figure 5-1: Typical Application Circuit
37186 - 5
The PCB trace width for HD rate signals is closely matched to SMT
component width to minimize reflections due to changes in trace impedance.
The PCB ground plane is removed under the GS2978 output components to
minimize parasitic capacitance.
The PCB ground plane is removed under the GS2978 R
minimize parasitic capacitance.
Input and output BNC connectors are surface mounted in-line to eliminate a
transmission line stub caused by a BNC mounting via high speed traces which
are curved to minimize impedance variations due to change of PCB trace
width.
750
October 2007
4
6
1
2
3
DDI
DDI
VEE
RSET
DISABLE
GS2978
SD/HD
SDO
SDO
VCC
VCC
10n
12
11
10
9
* TYPICAL VALUE: VARIES WITH LAYOUT
5.6n
5.6n
75
75
75
75
GS2978 Data Sheet
*
*
VCC
SET
4u7
4u7
pin and resistor to
10n
10 of 14
BNC
BNC