Switching Characteristics
(Notes 5, 6)
Over Supply Voltage and Operating Temperature ranges, unless otherwise specified
Symbol
t
PHLD
t
PLHD
t
SKD
t
SK1
t
SK2
t
TLH
t
THL
t
PHZ
t
PLZ
t
PZH
t
PZL
f
MAX
High to Low
Differential Propagation Delay
Low to High
Differential Skew
|t
PHLD
–t
PLHD
|
Skew, Pin to Pin (same device)
Skew, Part to Part (Note 8)
Differential Transition Time
Low to High (20% to 80%)
Differential Transition Time
High to Low (80% to 20%)
Disable Time High to Z
Disable Time Low to Z
Enable Time Z to High
Enable Time Z to Low
Maximum Operating Frequency
(Note 9)
Note 1:
“Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. They are not meant to imply that the device
should be operated at these limits. The table of “Electrical Characteristics” specifies conditions of device operation.
Note 2:
Current into device pins is defined as positive. Current out of device pins is defined as negative. All voltages are referenced to ground except differential volt-
ages V
OD1
, V
OD2
, V
OD3
.
Note 3:
All typical values are given for V
CC
= 3.3V and T
A
= +25˚C.
Note 4:
Only one output shorted at a time. The output (true or complement) is configured High.
Note 5:
f = 1 MHz, t
r
and t
f
≤
6 ns (10% to 90%).
Note 6:
See TIA/EIA-422-B specifications for exact test conditions.
Note 7:
This specification limit is for compliance with TIA/EIA-422-B and ITU-T V.11.
Note 8:
Devices are at the same V
CC
and within 5˚C within the operating temperature range.
Note 9:
All channels switching, output duty cycle criteria is 40%/60% measured at 50%. This parameter is guaranteed by design and characterization.
Parameter
Differential Propagation Delay
Conditions
R
L
= 100Ω, C
L
= 50 pF
(Figures
2, 3)
Min
6
6
Typ
10.5
11
0.5
1.0
3.0
4.2
4.7
Max
16
16
2.0
2.0
5.0
10
10
20
20
32
32
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
MHz
(Figures
4, 5
)
12
9
22
22
32
Parameter Measurement Information
DS012645-2
FIGURE 1. Differential Driver DC Test Circuit
3
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