DS90UR124_08 Datasheet, PDF (5/30 Pages) National Semiconductor (TI) – 5-43 MHz DC-Balanced 24-Bit LVDS Serializer and Deserializer

Symbol
t_ROS
t_ROH
Parameter
R_OUT (8:15) Setup Data to
RCLK (Group 2)
R_OUT (8:15) Hold Data to
RCLK (Group 2)
Conditions
PTOSEL = L,
SLEW = H,
(Figure 16)
t_ROS
R_OUT (16:23) Setup Data to
RCLK (Group 3)
t_ROH
R_OUT (16:23) Setup Data to
RCLK (Group 3)
t_ROS
R_OUT (0:7) Setup Data to
PTOSEL = H,
RCLK (Group 1)
SLEW = H,
t_ROH
R_OUT (0:7) Hold Data to RCLK ^{(Figure 15)}
(Group 1)
t_ROS
R_OUT (8:15) Setup Data to
RCLK (Group 2)
t_ROH
R_OUT (8:15) Hold Data to
RCLK (Group 2)
t_ROS
R_OUT (16:23) Setup Data to
RCLK (Group 3)
t_ROH
R_OUT (16:23) Setup Data to
RCLK (Group 3)
t_HZR
HIGH to TRI-STATE Delay PTOSEL = H,
t_LZR
LOW to TRI-STATE Delay ^{(Figure 14)}
t_ZHR
TRI-STATE to HIGH Delay
t_ZLR
TRI-STATE to LOW Delay
t_DD
Deserializer Delay
PTOSEL = H,
(Figure 12)
t_DSR
Deserializer PLL Lock Time (Notes 6, 8)
from Powerdown
RxIN_TOL-L Receiver INput TOLerance (Notes 7, 8, 10),
Left
(Figure 17)
RxIN_TOL-R Receiver INput TOLerance (Notes 7, 8, 10),
Right
(Figure 17)
Pin/Freq.
R_OUT [8:15],
LOCK
R_OUT [16:23]
R_OUT[0:7]
R_OUT [8:15],
LOCK
R_OUT [16:23]
R_OUT [0:23],
RCLK, LOCK
RCLK
5 MHz
43 MHz
5 MHz–43 MHz
5 MHz–43 MHz
Min
(0.35)*
t_RCP
(0.35)*
t_RCP
(0.35)*
t_RCP
(0.35)*
t_RCP
(0.35)*
t_RCP
(0.35)*
t_RCP
(0.35)*
t_RCP
(0.35)*
t_RCP
(0.35)*
t_RCP
(0.35)*
t_RCP
Typ
(0.5*t_RCP)–3 UI
Max Units
ns
(0.5*t_RCP)–3 UI
ns
(0.5*t_RCP)–3 UI
ns
(0.5*t_RCP)–3 UI
ns
(0.5*t_RCP)–2 UI
ns
(0.5*t_RCP)+2 UI
ns
(0.5*t_RCP)−1 UI
ns
(0.5*t_RCP)+1 UI
ns
(0.5*t_RCP)+1 UI
ns
(0.5*t_RCP)–1 UI
ns
3
10
ns
3
10
ns
3
10
ns
3
10
ns
[5+(5/56)]T+3.7
[5+(5/56)]T
+8
ns
128k*T ms
128k*T ms
0.25
UI
0.25
UI
Note 1: “Absolute Maximum Ratings” indicate limits beyond which damage to the device may occur, including inoperability and degradation of device reliability
and/or performance. Functional operation of the device and/or non-degradation at the Absolute Maximum Ratings or other conditions beyond those indicated in
the Recommended Operating Conditions is not implied. The Recommended Operating Conditions indicate conditions at which the device is functional and the
device should not be operated beyond such conditions.
Note 2: The Electrical Characteristics tables list guaranteed specifications under the listed Recommended Operating Conditions except as otherwise modified
or specified by the Electrical Characteristics Conditions and/or Notes. Typical specifications are estimations only and are not guaranteed.
Note 3: Typical values represent most likely parametric norms at V_DD = 3.3V, Ta = +25 degC, and at the Recommended Operation Conditions at the time of
product characterization and are not guaranteed.
Note 4: Current into device pins is defined as positive. Current out of a device pin is defined as negative. Voltages are referenced to ground except VOD, ΔVOD,
VTH and VTL which are differential voltages.
Note 5: When the Serializer output is tri-stated, the Deserializer will lose PLL lock. Resynchronization MUST occur before data transfer.
Note 6: t_DSR is the time required by the Deserializer to obtain lock when exiting powerdown mode.
Note 7: RxIN_TOL is a measure of how much phase noise (jitter) the Deserializer can tolerate in the incoming data stream before bit errors occur. It is a
measurement in reference with the ideal bit position, please see National’s AN-1217 for detail.
Note 8: Specification is guaranteed by characterization and is not tested in production.
Note 9: t_JIT (@BER of 10e-9) specifies the allowable jitter on TCLK. t_JIT not included in TxOUT_E_O parameter.
Note 10: UI – Unit Interval, equivalent to one ideal serialized data bit width. The UI scales with frequency.
Note 11: Figures 1, 2, 8, 12, 14 show a falling edge data strobe (TCLK IN/RCLK OUT).
Note 12: Figures 5, 15, 16 show a rising edge data strobe (TCLK IN/RCLK OUT).
Note 13: TxOUT_E_O is affected by pre-emphasis value.
5
www.national.com