DS90C124 Datasheet, PDF (4/17 Pages) National Semiconductor (TI) – 5-35MHz DC-Balanced 24-Bit LVDS Serializer and Deserializer

Serializer Switching Characteristics
Over recommended operating supply and temperature ranges unless otherwise specified.
Symbol
Parameter
Conditions
Min
t_LLHT
t_LHLT
LVDS Low-to-High Transition Time
LVDS High-to-Low Transition Time
R_L = 100Ω,
C_L = 10 pF to GND
VODSEL = L
(Figure 3)
t_DIS
DIN (0:23) Setup to TCLK
R_L = 100Ω,
5
t_DIH
DIN (0:23) Hold from TCLK
C_L = 10 pF to GND
(Note 8)
5
t_HZD
DOUT ± HIGH to TRI-STATE Delay R_L = 100Ω,
t_LZD
DOUT ± LOW to TRI-STATE Delay ^CL ^{= 10 pF to GND}
t_ZHD
DOUT ± TRI-STATE to HIGH Delay ^{(Note 4) (Figure 7)}
t_ZLD
DOUT ± TRI-STATE to LOW Delay
t_PLD
Serializer PLL Lock Time (Figure 8) R_L = 100Ω
t_SD
Serializer Delay (Figure 9)
R_L = 100Ω
VODSEL = L, TRFB = H
R_L = 100Ω
VODSEL = L, TRFB = L
Typ
Max
0.6
0.6
5
5
5
5
10
3.5T + 2.85
3.5T + 2.85
Units
ns
ns
ns
ns
ns
ns
ns
ns
ms
ns
ns
Deserializer Switching Characteristics
Over recommended operating supply and temperature ranges unless otherwise specified.
Symbol
Parameter
Conditions
Pin/Freq.
t_RCP
Receiver out Clock Period
(Note 8)
t_RCP = t_TCP
RCLK
t_RDC
t_CLH
t_CHL
RCLK Duty Cycle
CMOS/TTL Low-to-High
Transition Time
CMOS/TTL High-to-Low
Transition Time
C_L = 8 pF
(lumped load)
(Figure 4)
RCLK
ROUT [0:23],
LOCK, RCLK
t_ROS
ROUT (0:7) Setup Data to
RCLK (Group 1)
(Figure 11)
ROUT [0:7]
t_ROH
ROUT (0:7) Hold Data to
RCLK (Group 1)
(Figure 11)
t_ROS
ROUT (8:15) Setup Data to
RCLK (Group 2)
(Figure 11)
ROUT [8:15],
LOCK
t_ROH
ROUT (9:15) Hold Data to
RCLK (Group 2)
(Figure 11)
t_ROS
ROUT (16:23) Setup Data to
RCLK (Group 3)
(Figure 11)
ROUT [16:23]
t_ROH
ROUT (16:23) Hold Data to
RCLK (Group 3)
(Figure 11)
t_HZR
HIGH to TRI-STATE Delay (Figure 12)
ROUT [0:23],
t_LZR
LOW to TRI-STATE Delay
RCLK, LOCK
t_ZHR
TRI-STATE to HIGH Delay
t_ZLR
TRI-STATE to LOW Delay
Min
28.6
45
Typ
Max Units
200 ns
50
55 %
2.5
3.5 ns
2.5
3.5 ns
(2/5)*
(29/56)*t_{RCP tRCP} ns
(2/5)*
(27/56)*t_{RCP tRCP} ns
0.5*t_RCP
(2/5)*
ns
t_RCP
0.5*t_RCP
(2/5)*
ns
t_RCP
(2/5)*
(27/56)*t_{RCP tRCP} ns
(2/5)*
(29/56)*t_{RCP tRCP} ns
3
10 ns
3
10 ns
3
10 ns
3
10 ns
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