GS2978 HD-LINX III Multi-Rate Dual Slew-Rate Cable Driver
Features Description
SMPTE 424M, SMPTE 292M, SMPTE 344M and SMPTE The GS2978 is a high-speed BiCMOS integrated circuit
259M compliant designed to drive one or two 75 co-axial cables.
Dual coaxial cable driving outputs with selectable
The GS2978 may drive data rates up to 2.97Gb/s and
slew rate
provides two selectable slew rates in order to achieve
50 differential PECL input compliance to SMPTE 424M, SMPTE 259M, SMPTE 344M
and SMPTE 292M.
Pb-free and RoHS compliant
Seamless interface to other HD-LINX III family The GS2978 accepts a LVPECL level differential input that
products may be AC coupled. External biasing resistors at the inputs
are not required.
Single 3.3V power supply operation
Operating temperature range: 0C to 70C Power consumption is typically 168mW using a 3.3V
power supply. The GS2978 is Pb-free, and the
Applications encapsulation compound does not contain halogenated
flame retardant.
SMPTE 424M, SMPTE 292M, SMPTE 344M and SMPTE
259M Coaxial Cable Serial Digital Interfaces.
This component and all homogeneous subcomponents are
RoHS compliant.
BANDGAP REFERENCE AND BIASING CIRCUIT R
SET
DDI SDO
INPUT
OUTPUT STAGE &
DIFFERENTIAL
CONTROL
PAIR
DDI
SDO
SD/HD DISABLE
Functional Block Diagram
GS2978 1 of 15
www.gennum.com
HD-LINX III Multi-Rate Dual Slew-Rate Cable Driver
Data Sheet
37186 - 7 March 2009Revision History
Version ECR PCN Date Changes and/or Modifications
7 151357 March 2009 Added 2.5k reel option to section 6.6 Ordering Information. Added
maximum power consumption value to Table 2-1: DC Electrical
Characteristics.
6 150277 August 2008 Updated data sheet format. Added Tape & Reel Part Number to 6.6
Ordering Information.
5 147849 October 2007 Changed minimum value of differential input signal amplitude in
Section 4.1.
4 147552 September Changed Input Voltage Swing in Table 2-2: AC Electrical Characteristics.
2007
3 146309 July 2007 Corrected part number typo in Ordering Information on page 14.
2 144827 41693 April 2007 Added Table 4-1: RSET vs. VOD.
1 142318 November 2006 Converting to Data Sheet. Added section 6.4 Solder Reflow Profiles.
Added typical ORL values in AC Electrical Characteristics.
0 140608 May 2006 Changed to Preliminary Data Sheet. Removed references to trial
publication for SMPTE 424M. Modified I /I conditions to 10A in DC
IH IL
Electrical Characteristics and additive jitter in AC Electrical
Characteristics. Added section 4.3 Output Return Loss Measurement.
B 139766 March 2006 Corrected pad standoff height and tolerances for pad width & package
dimension. Corrected pad shape.
A 138454 February 2006 New document.
GS2978 2 of 15
HD-LINX III Multi-Rate Dual Slew-Rate Cable Driver
Data Sheet
37186 - 7 March 2009