SNLS045B – JULY 1999 – REVISED APRIL 2013
SWITCHING CHARACTERISTICS
Over Supply Voltage and Operating Temperature ranges, unless otherwise specified.
(1) (2) (3) (4)
Symbol
t
PHLD
t
PLHD
t
SKD1
t
SKD2
t
SKD3
t
SKD4
t
TLH
t
THL
t
PHZ
t
PLZ
t
PZH
t
PZL
f
MAX
(1)
(2)
(3)
(4)
(5)
(6)
(7)
Parameter
Differential Propagation Delay High to Low
Differential Propagation Delay Low to High
Differential Pulse Skew |t
PHLD
−
t
PLHD
|
(5)
Differential Channel-to-Channel Skew; same device
Differential Part to Part Skew
(4)
Differential Part to Part Skew
Rise Time
Fall Time
Disable Time High to Z
Disable Time Low to Z
Enable Time Z to High
Enable Time Z to Low
Maximum Operating Frequency
(7)
(6)
(3)
Conditions
C
L
= 15 pF
V
ID
= 200 mV
1
and
Min
1.2
1.2
0
0
Typ
2.0
1.9
0.1
0.15
Max
2.7
2.7
0.4
0.5
1.0
1.5
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
MHz
0.5
0.35
R
L
= 2 kΩ
C
L
= 15 pF
3
and
8
8
9
9
All Channels Switching
200
250
1.0
1.0
14
14
14
14
All typicals are given for: V
CC
= +3.3V, T
A
= +25°C.
Generator waveform for all tests unless otherwise specified: f = 1 MHz, Z
O
= 50Ω, t
r
and t
f
(0% to 100%)
≤
3 ns for R
IN
.
t
SKD2
, Channel-to-Channel Skew is defined as the difference between the propagation delay of one channel and that of the others on the
same chip with any event on the inputs.
t
SKD3
, part to part skew, is the differential channel-to-channel skew of any event between devices. This specification applies to devices
at the same V
CC
, and within 5°C of each other within the operating temperature range.
t
SKD1
is the magnitude difference in differential propagation delay time between the positive going edge and the negative going edge of
the same channel
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.
f
MAX
generator input conditions: t
r
= t
f
< 1 ns (0% to 100%), 50% duty cycle, differential (1.05V to 1.35V peak to peak). Output criteria:
60/40% duty cycle, V
OL
(max 0.4V), V
OH
(min 2.7V), Load = 15 pF (stray plus probes).
PARAMETER MEASUREMENT INFORMATION
Figure 1. Receiver Propagation Delay and Transition Time Test Circuit
Figure 2. Receiver Propagation Delay and Transition Time Waveforms
Copyright © 1999–2013, Texas Instruments Incorporated
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