Datasheet

DS90LV049Q
SNLS300D –MAY 2008–REVISED APRIL 2013 www.ti.com
Switching Characteristics
Over supply voltage and operating temperature ranges, unless otherwise specified.
(1)(2)
Parameter Test Conditions Min Typ Max Units
LVDS Outputs (Driver Outputs)
t
PHLD
Differential Propagation Delay High to Low 0.7 2 ns
t
PLHD
Differential Propagation Delay Low to High 0.7 2 ns
t
SKD1
Differential Pulse Skew |t
PHLD
− t
PLHD
|
(3) (4)
0 0.05 0.4 ns
R
L
= 100 Ω
t
SKD2
Differential Channel-to-Channel Skew
(3) (5)
0 0.05 0.5 ns
(Figure 3 and Figure 4)
t
SKD3
Differential Part-to-Part Skew
(3) (6)
0 1.0 ns
t
TLH
Rise Time
(3)
0.2 0.4 1 ns
t
THL
Fall Time
(3)
0.2 0.4 1 ns
t
PHZ
Disable Time High to Z 1.5 3 ns
t
PLZ
Disable Time Low to Z 1.5 3 ns
R
L
= 100 Ω
(Figure 5 and Figure 6)
t
PZH
Enable Time Z to High 1 3 6 ns
t
PZL
Enable Time Z to Low 1 3 6 ns
f
MAX
Maximum Operating Frequency
(7)
250 MHz
LVCMOS Outputs (Receiver Outputs)
t
PHL
Propagation Delay High to Low 0.5 2 3.5 ns
t
PLH
Propagation Delay Low to High 0.5 2 3.5 ns
t
SK1
Pulse Skew |t
PHL
− t
PLH
|
(8)
0 0.05 0.4 ns
t
SK2
Channel-to-Channel Skew
(9)
(Figure 7 and Figure 8) 0 0.05 0.5 ns
t
SK3
Part-to-Part Skew
(10)
0 1.0 ns
t
TLH
Rise Time
(3)
0.3 0.9 1.4 ns
t
THL
Fall Time
(3)
0.3 0.75 1.4 ns
t
PHZ
Disable Time High to Z 3 5.6 8 ns
t
PLZ
Disable Time Low to Z 3 5.4 8 ns
(Figure 9 and Figure 10)
t
PZH
Enable Time Z to High 2.5 4.6 7 ns
t
PZL
Enable Time Z to Low 2.5 4.6 7 ns
f
MAX
Maximum Operating Frequency
(11)
250 MHz
(1) All typical values are given for: V
DD
= +3.3 V, T
A
= +25°C.
(2) Generator waveform for all tests unless otherwise specified: f = 1 MHz, Z
O
= 50 Ω, t
r
≤ 1 ns, and t
f
≤ 1 ns.
(3) These parameters are ensured by design. The limits are based on statistical analysis of the device performance over PVT (process,
voltage, temperature) ranges.
(4) t
SKD1
or differential pulse skew is defined as |t
PHLD
− t
PLHD
|. It is the magnitude difference in the differential propagation delays between
the positive going edge and the negative going edge of the same driver channel.
(5) t
SKD2
or differential channel-to-channel skew is defined as the magnitude difference in the differential propagation delays between two
driver channels on the same device.
(6) t
SKD3
or differential part-to-part skew is defined as |t
PLHD Max
− t
PLHD Min
| or |t
PHLD Max
− t
PHLD Min
|. It is the difference between the
minimum and maximum specified differential propagation delays. This specification applies to devices at the same V
DD
and within 5°C of
each other within the operating temperature range.
(7) f
MAX
generator input conditions: t
r
= t
f
< 1 ns (0% to 100%), 50% duty cycle, 0 V to 3 V. Output Criteria: duty cycle = 45%/55%, V
OD
>
250 mV, all channels switching.
(8) t
SK1
or pulse skew is defined as |t
PHL
− t
PLH
|. It is the magnitude difference in the propagation delays between the positive going edge
and the negative going edge of the same receiver channel.
(9) t
SK2
or channel-to-channel skew is defined as the magnitude difference in the propagation delays between two receiver channels on the
same device.
(10) t
SK3
or part-to-part skew is defined as |t
PLH Max
− t
PLH Min
| or |t
PHL Max
− t
PHL Min
|. It is the difference between the minimum and maximum
specified propagation delays. This specification applies to devices at the same V
DD
and within 5°C of each other within the operating
temperature range.
(11) f
MAX
generator input conditions: t
r
= t
f
< 1 ns (0% to 100%), 50% duty cycle, V
ID
= 200 mV, V
CM
= 1.2 V . Output Criteria: duty cycle =
45%/55%, V
OH
> 2.7 V, V
OL
< 0.25 V, all channels switching.
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