Datasheet

www.ti.com
SWITCHING CHARACTERISTICS
SN65LVDS048A
SLLS451B – SEPTEMBER 2000 – REVISED SEPTEMBER 2002
over recommended operating conditions (unless otherwise noted)
(1)
PARAMETER TEST CONDITIONS MIN TYP
(2)
MAX UNIT
t
PHL
Differential propagation delay, high-to-low 1.9 2.7 3.7 ns
t
PLH
Differential propagation delay, low-to-high 1.9 2.9 3.7 ns
t
SK(p)
Differential pulse skew (t
PHLD -
t
PLHD
)
(3)
200 450 ps
C
L
= 15 pF
t
SK(o)
Differential channel-to-channel skew; same device
(4)
50 500 ps
V
ID
= 200 mV
t
SK(pp)
Differential part-to-part skew
(5)
1 ns
(see Figure 1 and Figure 2 )
t
SK(lim)
Differential part-to-part skew
(6)
1.5 ns
t
r
Rise time 0.5 1 ns
t
f
Fall time 0.5 1 ns
t
PHZ
Disable time high to Z 8 9 ns
R
L
= 2 K Ω
t
PLZ
Disable time low to Z 6 8 ns
C
L
= 15 pF
t
PZH
Enable time Z to high 8 10 ns
(see Figure 3 and Figure 4 )
t
PZL
Enable time Z to low 7 8 ns
f
(MAX)
Maximum operating frequency
(7)
All channels switching 200 250 MHz
(1) Generator waveform for all tests unless otherwise specified: f = 1 MHz, Z
O
= 50 Ω , t
r
and t
f
(0%–100%) ≤ 3 ns for R
IN
.
(2) All typical values are at 25°C and with a 3.3-V supply.
(3) t
SK(p)
|t
PLH
– t
PHL
| is the magnitude difference in differential propagation delay time between the positive going edge andthe negative
going edge of the same channel.
(4) t
SK(o)
is the differential channel-to-channel skew of any event on the same device.
(5) t
SK(pp)
is the differential part-to-part skew, and is defined as the difference between the minimum and the maximum specified differential
propagation delays. This specification applies to devices at the same VCC and within 5°C of each other within the operating temperature
range.
(6) t
sk(lim)
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
sk(lim)
is defined as |Min - Max|
differential propagation delay.
(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% to 55%,V
OD
>
250 mV, all channels switching
4
Submit Documentation Feedback