Datasheet
TLK3101
2.5 Gbps to 3.125 Gbps TRANSCEIVER
SCAS649B − AUGUST 2000 − REVISED JANUARY 2008
18
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
transmitter/receiver characteristics
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V
O
Preemphasis V
O
D
, direct,
Rt = 50 Ω, PREM = high, dc-coupled,
See Figure 12
655 725 795
mV
V
OD(p)
Preemphasis V
OD
,
direct
,
V
OD(p)
=
|VTXP − VTXN|
Rt = 50 Ω, PREM = low, dc-coupled,
See Figure 12
590 650 710
mV
V
Differential,
p
eak-to-
p
eak out
p
ut volta
g
e with
Rt = 50 Ω, PREM = high, dc-coupled,
See Figure 12
1310 1450 1590
mV
V
OD(pp_p)
Differential
,
peak to peak output voltage with
preemphasis
Rt = 50 Ω, PREM = low, dc-coupled,
See Figure 12
1180 1300 1420
mV
p-p
V
OD(d)
Deemphais output voltage,
|VTXP − VTXN|
Rt = 50 Ω, DC-coupled, See Figure 12 540 600 660 mV
V
OD(pp_d)
Differential, peak-to-peak output voltage with
de-emphasis
Rt = 50 Ω, dc-coupled, See Figure 12 1080 1200 1320 mV
p-p
V
(cmt)
Transmit common mode voltage range,
(VTXP + VTXN)/2
Rt = 50 Ω, See Figure 12 1000 1250 1400 mV
V
ID
Receiver input voltage differential,
|VRXP – VRXN|
200 1600 mV
V
(cmr)
Receiver common mode voltage range,
(VRXP + VRXN)/2
1000 1250 2250 mV
I
lkg
Receiver input leakage current −10 10 µA
C
i
Receiver input capacitance 2 pF
Serial data total jitter (peak-to-peak)
Differential output jitter at 3.125 Gbps,
Random + deterministic, PRBS pattern
0.20 UI
†
S
er
i
a
l d
ata
tota
l ji
tter
(
pea
k
-to-pea
k)
Differential output jitter at 2.5 Gbps,
Random + deterministic, PRBS pattern
0.16 UI
†
t
t,
t
f
Differential output signal rise, fall time
(20% to 80%)
R
L
= 50 Ω, C
L
= 5 pF, See Figure 12 150 ps
Jitter tolerance
Differential input jitter, random +
determinisitc, PRBS pattern at zero
crossing
0.60 UI
t
d
(
Tx
latency)
Tx latency See Figure 2 34 38 bits
t
d
(
Rx
latency)
Rx latency See Figure 5 76 107 bits
†
UI is the time interval of one serialized bit.
V
OD(d)
V
OD(p)
V
(cmt)
V
OD(p)
V
OD(d)
Bit
Time
Bit
Time
t
r
t
f
V
OD(pp_p)
V
OD(pp_d)
Figure 12. Differential and Common-Mode Output Voltage Definitions (|VTXP − VTXN|)