GS2978 Datasheet, PDF (4/15 Pages) Gennum Corporation – Dual coaxial cable driving outputs with selectable slew rate

1. Pin Out
1.1 Pin Assignment
16
DDI 1
15
14
13
12 SDO
DDI 2
VEE 3
GS2978
(top view)
11 SDO
10 SD/HD
RSET 4
5
6
7
9 VCC
8
Center Pad
(bottom of package)
Figure 1-1: 16-Pin QFN
1.2 Pin Descriptions
Table 1-1: Pin Descriptions
Pin Number
1,2
3
4
5,8,13,14,
15,16
7
6
Name
DDI, DDI
V_EE
R_SET
NC
RSVD
DISABLE
9
V_CC
10
SD/HD
Timing
Analog
–
Analog
–
Type
Input
Power
Input
–
Description
Serial digital differential input.
Most negative power supply connection. Connect to GND.
External output amplitude control resistor.
No Connect. Not bonded internally.
–
Non
Synchronous
–
Non
Synchronous
Reserved
Input
Power
Input
Do not connect.
Serial output disable. When asserted LOW, the SDO/SDO output
driver is powered off. SDO/SDO will float to V_CC through the pull-up
resistor.
Most positive power supply connection. Connect to +3.3V.
Output slew rate control. When set HIGH, the output will meet
SMPTE 259M rise/fall time specifications. When set LOW, the serial
outputs will meet SMPTE424M and SMPTE 292M rise/fall time
specifications.
GS2978
HD-LINX® III Multi-Rate Dual Slew-Rate Cable Driver
Data Sheet
37186 - 7
March 2009
4 of 15