DS92LV1021 National Semiconductor, DS92LV1021 Datasheet - Page 6

• Manufacturer Part Number: DS92LV1021
• Description: 16-40 MHz 10 Bit Bus LVDS Serializer and Deserializer
• Manufacturer: National Semiconductor

www.national.com
Symbol
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
RCP
CLH
CHL
DD
ROS
ROH
RDC
HZR
LZR
ZHR
ZLR
DSR1
DSR2
ZHLK
RNM
Over recommended operating supply and temperature ranges unless otherwise specified.
Deserializer Timing Requirements for REFCLK
Deserializer Switching Characteristics
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
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: Due to TRI-STATE of the Serializer, the Deserializer will lose PLL lock and have to resynchronize before data transfer.
Note 5: 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 derserializer 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 6: tRNM is a measure of how much phase noise (jitter) the deserializer can tolerate in the incoming data stream before bit errors occur.
t
t
t
t
RFCP
RFDC
RFCP
RFTT
Over recommended operating supply and temperature ranges unless otherwise specified.
Symbol
/ t
TCP
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
Parameter
REFCLK Period
REFCLK Duty Cycle
Ratio of REFCLK to TCLK
Periods
REFCLK Transition Time
Parameter
CC
= 3.3V and T
Figure 9
t
CL = 15 pF
Figure 4
Figure 10
Figure 11
Figure 12
(Note 5)
Figure 13
Figure 14
Figure 15
(Note 6)
RCP
Conditions
A
= +25˚C.
= t
TCP
Conditions
LOCK, RCLK
16MHz
40MHz
16MHz
40MHz
16 MHz
40 MHz
Rout(0-9),
Rout(0-9),
Pin/Freq.
6
RCLK
RCLK
LOCK
LOCK
1.75*t
−0.4*t
0.4*t
0.83
Min
Min
400
100
25
25
40
RCP
RCP
RCP
4.2+0.5*t
6.5+0.5*t
1.75*t
4+0.5*t
6+0.5*t
−0.5*t
0.5*t
Typ
50
T
1
3
1100
Typ
400
4.8
4.5
1.5
50
2
2
7
7
RCP
RCP
RCP
RCP
RCP
RCP
RCP
+3
Max
62.5
1.03
1.75*t
6
10+t
10+t
12+t
12+t
Max
62.5
25.6
60
15
10
12
5
5
7
RCP
RCP
RCP
RCP
RCP
+7
Units
ns
ns
%
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
µs
µs
µs
µs
ns
ps
ps
%