SNLS249M – FEBRUARY 2007 – REVISED APRIL 2013
Electrical Characteristics (continued)
Over recommended operating supply and temperature ranges unless other specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
N
Supply Noise Tolerance
(3)
DC to 50MHz
100
mV
P-P
CML INPUTS
V
TX
Input Voltage Swing (Launch
Measured differentially at TPA
800
1200
mV
P-P
Amplitude)
(
V
ICMDC
Input Common-Mode Voltage
DC-Coupled Requirement
V
DD
-0.3
V
DD
-0.2
V
Measured at TPA (
)
V
IN
Input Voltage Swing
Measured differentially at TPB
120
mV
P-P
(
R
LI
Differential Input Return Loss
100 MHz– 825 MHz, with fixture's
10
dB
effect de-embedded
R
IN
Input Resistance
IN+ to VDD and IN
−
to VDD
45
50
55
Ω
CML OUTPUTS
V
O
Output Voltage Swing
Measured differentially with OUT+
and OUT
−
terminated by 50
Ω
to
800
1200
mV
P-P
VDD
V
OCM
Output common-mode Voltage
Measured Single-ended
V
DD
-0.3
V
DD
-0.2
V
t
R
, t
F
Transition Time
20% to 80% of differential output
voltage, measured within 1" from
75
240
ps
output pins.
t
CCSK
Inter Pair Channel-to-Channel
Difference in 50% crossing
Skew (all 4 Channels)
between shortest and longest
25
ps
channels
t
D
Latency
350
ps
OUTPUT JITTER
TJ1
Total Jitter at 1.65 Gbps
20m 28 AWG STP DVI Cable
Data Paths
0.13
0.17
UI
P-P
EQ Setting 0x04 PRBS7
(4) (5) (6)
TJ2
Total Jitter at 2.25 Gbps
20m 28 AWG STP DVI Cable
Data Paths
0.2
UI
P-P
EQ Setting 0x04 PRBS7
(4) (5) (6)
TJ3
Total Jitter at 165 MHz
Clock Paths
0.165
UI
P-P
Clock Pattern
(4) (5) (6)
TJ4
Total Jitter at 225 MHz
Clock Paths
0.165
UI
P-P
Clock Pattern
(4) (5) (6)
RJ
Random Jitter
See
(6) (7)
3
ps
rms
BIT RATE
F
CLK
Clock Frequency
Clock Path
(4)
25
225
MHz
BR
Bit Rate
Data Path
(4)
0.25
2.25
Gbps
(3)
Allowed supply noise (mV
P-P
sine wave) under typical conditions.
(4)
Specification is ensured by characterization and is not tested in production.
(5)
Deterministic jitter is measured at the differential outputs (TPC of
), minus the deterministic jitter before the test channel (TPA of
). Random jitter is removed through the use of averaging or similar means.
(6)
Total Jitter is defined as peak-to-peak deterministic jitter from
+ 14.2 times random jitter in ps
rms
.
(7)
Random jitter contributed by the equalizer is defined as sq rt (J
OUT
2
−
J
IN
2
). J
OUT
is the random jitter at equalizer outputs in ps
rms
, see
TPC of
; J
IN
is the random jitter at the input of the equalizer in ps
rms
, see TPA of
Copyright © 2007–2013, Texas Instruments Incorporated
5
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