Deserializer Switching Characteristics
Over recommended operating supply and temperature ranges unless otherwise specified.
Symbol
t
RCP
t
CLH
t
CHL
t
DD
t
ROS
t
ROH
t
RDC
t
HZR
t
LZR
t
ZHR
t
ZLR
t
DSR1
Parameter
Receiver out Clock
Period
CMOS/TTL Low-to-High
Transition Time
CMOS/TTL High-to-Low
Transition Time
Deserializer Delay
ROUT (0-9) Setup Data to
RCLK
ROUT (0-9) Hold Data to
RCLK
RCLK Duty Cycle
HIGH to TRI-STATE Delay
LOW to TRI-STATE Delay
TRI-STATE to HIGH Delay
TRI-STATE to LOW Delay
Deserializer PLL Lock Time
from PWRDWN (with
SYNCPAT)
Deserializer PLL Lock time
from SYNCPAT
TRI-STATE to HIGH Delay
(power-up)
Deserializer Noise Margin
(Note 4)
Figure 7
Figure 8
16MHz
40MHz
16MHz
40MHz
LOCK
Conditions
Pin/Freq.
RCLK
Rout(0-9),
LOCK, RCLK
Min
25
2
2
1.75*t
RCP
+ 1.5
RCLK
0.4*t
RCP
−0.4*t
RCP
40
1.75*t
RCP
+4.0
0.5*t
RCP
−0.5*t
RCP
50
4.2+0.5*t
RCP
4.5+0.5*t
RCP
6+0.5*t
RCP
6.0+0.5*t
RCP
18.2
7.4
21.0
14.4
4.62
400
100
1100
400
60
10+t
RCP
10+t
RCP
12+t
RCP
12+t
RCP
22
25.6
30
25
12
Typ
Max
62.5
6
6
1.75*t
RCP
+6.5
Units
ns
ns
ns
ns
ns
ns
%
ns
ns
ns
ns
µs
µs
µs
µs
ns
ps
ps
Figure 3
t
RCP
= t
TCP
CL = 15 pF
Figure 2
Figure 4
Figure 5
Figure 6
Rout(0-9),
LOCK
t
DSR2
t
ZHLK
t
RNM
Figure 9
(Note 5)
16 MHz
40 MHz
Note 1:
“Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. They are not meant to imply that the devices
should be operated at these limits. The table of “Electrical Characteristics” specifies conditions of device operation.
Note 2:
Typical values are given for V
CC
= 3.3V and T
A
= +25˚C.
Note 3:
Current into device pins is defined as positive. Current out of device pins is defined as negative. Voltages are referenced to ground except VOD,
∆VOD,
VTH
and VTL which are differential voltages.
Note 4:
For the purpose of specifying Deserializer PLL performance tDSR1 and tDSR2 are specified with the REFCLK running and stable, and specific conditions
of the incoming data stream (SYNCPATs). It is recommended that the Deserializer be initialized using either tDSR1 timing or tDSR2 timing. tDSR1 is the time required
for the Deserializer to indicate lock upon power-up or when leaving the power-down mode. Synchronization patterns should be sent to the device before initiating ei-
ther condition. tDSR2 is the time required to indicate lock for the powered-up and enabled Deserializer when the input (RI+ and RI-) conditions change from not re-
ceiving data to receiving synchronization patterns (SYNCPATs).
Note 5:
tRNM is a measure of how much phase noise (jitter) the Deserializer can tolerate in the incoming data stream before bit errors occur.
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