2.3 AC Electrical Characteristics
Table 2-2: AC Electrical Characteristics
V
= 3.3V 5ꢀ or 2.5V 5ꢀ; T = -40°C to +85°C, unless otherwise shown
A
CC
Parameter
Symbol
Conditions
–
Min
.27
–
Typ
–
Max
1.485
–
Units
Notes
Serial input data rate
Additive jitter
DR
Gb/s
1
2
2
3
3
–
SDO
–
–
1.485Gb/s
270Mb/s
SD/HD=0
SD/HD=1
HD mode only
10
30
–
ps
ps
p-p
p-p
–
–
Rise/Fall time
t , t
–
135
800
35
ps
r
f
f
t , t
400
–
–
ps
ps
r
Mismatch in rise/fall time
Duty cycle distortion
Ut , Ut
–
r
f
–
–
SD/HD=0
SD/HD=1
SD/HD=0,
–
–
–
–
–
20
50
10
–
ps
ps
ꢀ
dB
4, 5
4, 5
4
Overshoot
–
–
–
Output Return Loss
Output Voltage Swing
ORL
17
750
19
800
6
V
R
= 750Ω
850
mV
4
OUT
SET
p-p
Input Voltage Swing
UV
Differential
300
–
2000
mV
–
DDI
p-pd
Output Enable Delay
Output Disable Delay
NOTES:
–
–
–
–
–
–
–
–
100
80
ns
ns
–
–
1. The input coupling capacitor must be set accordingly for lower data rates.
2. Turning on input trace equalization will reduce jitter in most applications.
3. Rise/Fall time measured between 20% and 80% applies to 800mV output swing only.
4. Single-ended into a 75Ω external load.
5. Calculated as the actual positive bit-width compared to the expected positive bit-width using a 1010 pattern.
6. ORL depends on board design. The GS1679 achieves this specification on Gennum's evaluation boards.
GS1679 Cable Driver with HD/SD Capability
Data Sheet
6 of 16
54175 - 1
March 2011
GENNUM [ GENNUM CORPORATION ]
