Datasheet

DS91M040
www.ti.com SNLS283M –FEBRUARY 2008–REVISED APRIL 2013
Switching Characteristics
(1)(2)(3)
Over recommended operating supply and temperature ranges unless otherwise specified.
Symbol Parameter Conditions Min Typ Max Units
DRIVER AC SPECIFICATIONS
t
PLH
Differential Propagation Delay Low to High R
L
= 50Ω, C
L
= 5 pF, 1.5 3.3 5.5 ns
t
PHL
Differential Propagation Delay High to Low C
D
= 0.5 pF 1.5 3.3 5.5 ns
t
SKD1
Pulse Skew
(4)(5)
Figure 7 30 125 ps
Figure 8
t
SKD2
Channel-to-Channel Skew
(4)(6)
100 200 ps
t
SKD3
Part-to-Part Skew
(4)(7)
0.8 1.6 ns
t
SKD4
Part-to-Part Skew
(4)(8)
4 ns
t
TLH
Rise Time
(4)
1.2 2.0 3.0 ns
t
THL
Fall Time
(4)
1.2 2.0 3.0 ns
t
PZH
Enable Time (Z to Active High) R
L
= 50Ω, C
L
= 5 pF, 7.5 11.5 ns
t
PZL
Enable Time (Z to Active Low ) C
D
= 0.5 pF 8.0 11.5 ns
t
PLZ
Disable Time (Active Low to Z) Figure 9 7.0 11.5 ns
Figure 10
t
PHZ
Disable Time (Active High to Z) 7.0 11.5 ns
RECEIVER AC SPECIFICATIONS
t
PLH
Propagation Delay Low to High C
L
= 15 pF 1.5 3.0 4.5 ns
t
PHL
Propagation Delay High to Low Figure 11 1.5 3.1 4.5 ns
Figure 12
Figure 13
t
SKD1A
Pulse Skew (Receiver Type 1)
(4)(5)
55 325 ps
t
SKD1B
Pulse Skew (Receiver Type 2)
(4)(5)
475 800 ps
t
SKD2
Channel-to-Channel Skew
(4)(6)
60 300 ps
t
SKD3
Part-to-Part Skew
(4)(7)
0.6 1.2 ns
t
SKD4
Part-to-Part Skew
(8)
3 ns
t
TLH
Rise Time
(4)
0.3 1.1 1.6 ns
t
THL
Fall Time
(4)
0.3 0.65 1.6 ns
t
PZH
Enable Time (Z to Active High) R
L
= 500Ω, C
L
= 15 pF 3 5.5 ns
t
PZL
Enable Time (Z to Active Low) Figure 14 3 5.5 ns
Figure 15
t
PLZ
Disable Time (Active Low to Z) 3.5 5.5 ns
t
PHZ
Disable Time (Active High to Z) 3.5 5.5 ns
GENERIC AC SPECIFICATIONS
t
WKUP
Wake Up Time
(4)
500 ms
(Master Device Enable (MDE) time)
f
MAX
Maximum Operating Frequency
(4)
125 MHz
(1) The Electrical Characteristics tables list ensured 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 ensured.
(2) Typical values represent most likely parametric norms for V
DD
= +3.3V and T
A
= +25°C, and at the Recommended Operation Conditions
at the time of product characterization and are not specified.
(3) C
L
includes fixture capacitance and C
D
includes probe capacitance.
(4) Specification is ensured by characterization and is not tested in production.
(5) t
SKD1
, |t
PLHD
− t
PHLD
|, Pulse Skew, is the magnitude difference in differential propagation delay time between the positive going edge and
the negative going edge of the same channel.
(6) t
SKD2
, Channel-to-Channel Skew, is the difference in propagation delay (t
PLHD
or t
PHLD
) among all output channels.
(7) t
SKD3
, Part-to-Part Skew, is defined as the difference between the minimum and maximum 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.
(8) t
SKD4
, Part-to-Part Skew, is the differential channel-to-channel skew of any event between devices. This specification applies to devices
over recommended operating temperature and voltage ranges, and across process distribution. t
SKD4
is defined as |Max − Min|
differential propagation delay.
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