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PS8663 02/21/03
Features
Ten line drivers meet or exceed the requirements of
the ANSI EIA/TIA-644 Standard
Designed for signaling rates
up to 660 Mbps with very
low radiation (EMI)
Low voltage differential signaling with typical output
voltage of 350mV into a:
100-ohm load (PI90LV3811)
50-ohm load (PI90LVB3811)
Propagation delay times less than 2.9ns
Output skew is less than 150ps
Part-to-part skew is less than 1.5ns
35mW total power dissipation in each driver operating
at 200 MHz
Driver is high impedance when disabled or with V
CC
<1.5V
Bus-pin ESD protection exceeds 10kV
Low voltage TTL (LVTTL) logic inputs are 5V tolerant
Package: 48-Pin TSSOP (A)
Description
The PI90LV3811 and PI90LVB3811 consist of ten differential line
drivers that implement the electrical characteristics of low-voltage
differential signaling (LVDS). This signaling technique lowers out-
put voltage levels to reduce the power, increase switching speeds,
and allow operation with a 3V supply rail. Any current-mode LVDS
driver will deliver a minimum differential output voltage magnitude
of 247mV into a 100-Ohm load (PI90LV3811) or 50-Ohm load
(PI90LVB3811) when enabled. The PI90LVB3811 doubles the output
drive current to achieve LVDS levels with a 50-Ohm load.
The intended application of this device and signaling technique
is for point-to-point baseband (single termination) and multipoint
(double termination) data transmission over a controlled impedance
media of approximately 100-Ohms. The transmission media may be
printed-circuit board traces, backplanes, or cables. The large number
of drivers integrated into the same substrate, along with the low pulse
skew of balanced signaling, allows extremely precise timing align-
ment of clock and data for synchronous parallel data transfers. When
used with its companion 10-channel receivers, the PI90LV3810 or
PI90LVR3810, over 300 million data transfers per second in single-
edge clocked systems are possible with very little power.
(Note: The ultimate rate and distance of data transfer is dependent
upon attenuation characteristics of the media, the noise coupling to
the environment, and other system characteristics.)
The drivers are enabled in groups of five. When disabled, the driver
outputs are a high impedance. Each driver input (D
IN
) and enable (EN)
have an internal pulldown that will drive the input to a low level when
open circuited.
The PI90LV3811 and PI90LVB3811 are characterized for operation
from 40C to 85C.
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PI90LV3811/PI90LVB3811
High-Speed Differential Line Drivers
PI90LV3811 & PI90LVB3811
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PS8663 02/21/03
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PI90LV3811/PI90LVB3811
High-Speed Differential Line Drivers
Block Diagram
Pin Configuration
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PS8663 02/21/03
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PI90LV3811/PI90LVB3811
High-Speed Differential Line Drivers
Supply Voltage Range, V
CC
(1) ........................................
0.5V to 4V
Voltage Range: Inputs ............................................ 0.5V to 6V
D
OUT+
or D
OUT .................................................................
0.5V to 4V
Electrostatic Discharge
(2):
(D
OUT+
,D
OUT
and GND) ................ Class 3, A: 10kV, B:700V
(All Pins) ........................................... Class 3, A: 8kV, B:600V
Continuous Power Dissipation .... (see dissipation rating table)
Storage Temperature Range ............................. 65C to 150C
Lead Temperature 1.6mm (1/16 inch)
from case for 10 seconds .............................................. 260C
Absolute Maximum Ratings Over Operating
Free-Air Temperature
(unless otherwise noted)
Stresses beyond those listed under "Absolute Maximum
Ratings" may cause permanent damage to the device. These are
stress ratings only, and functional operation of the device at these
or any other conditions beyond those indicated under "Recom-
mended Operating Conditions" is not implied. Exposure to Abso-
lute-Maximum-Rated conditions for extended periods may affect
device reliability.
Notes:
1. All voltage values, except differential I/O bus voltages, are with
respect to ground terminal.
2. Tested in accordance with MIL-STD-883C Method 3015.7
Recommended Operating Conditions
Driver Function Table
t
u
p
n
I
l
a
i
t
n
e
r
e
f
f
i
D
s
e
l
b
a
n
E
s
t
u
p
t
u
O
D
N
I
N
E
D
+
T
U
O
D
T
U
O
H
H
H
L
L
H
L
H
X
L
Z
Z
n
e
p
O
H
L
H
H = high level,
L = low level,
X = irrelevent,
Z = high impedance (off)
.
n
i
M
.
m
o
N
.
x
a
M
s
t
i
n
U
V
,
e
g
a
tl
o
V
y
l
p
p
u
S
C
C
0
.
3
3
.
3
6
.
3
V
V
,
e
g
a
tl
o
V
t
u
p
n
I
l
e
v
e
L
-
h
g
i
H
H
I
0
.
2
V
,
e
g
a
tl
o
V
t
u
p
n
I
l
e
v
e
L
-
w
o
L
L
I
8
.
0
ri
a
-
e
e
r
f
g
n
it
a
r
e
p
O
T
,
e
r
u
t
a
r
e
p
m
e
t
A
0
4
5
8
C
4
PS8663 02/21/03
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PI90LV3811/PI90LVB3811
High-Speed Differential Line Drivers
Electrical Characteristics Over Recommended Operating Conditions
(unless otherwise noted)
Note: 1. All typical values are at 25C and with a 3.3V supply.
Symbol
Parameter
Test Condition
Min.
Typ.
(1)
Max.
Units
V
OH
Differential output voltage magnitude
R
L
= 50-Ohm (PI90LVB3811)
R
L
= 100-Ohm (PI90LV3811)
C
L
= 10pF
See Figures 1 and 2
247
340
454
mV
V
OH
Change in differential output voltage magnitude
between logic states
-50
50
V
OC(SS)
Steady-state common-mode output voltage
See Figure 3
1.125
1.375
V
V
OC(SS)
Change in steady-state common-mode output
voltage between logic states
-50
50
mV
V
OC(PP)
Peak-to-peak common-mode output voltage
50
150
I
CC
Supply current
R
L
= 100-Ohm (PI90LV3811)
Enabled, V
IN
= GND or V
CC
50
70
mA
R
L
= 50-Ohm (PI90LVB3811)
Enabled, V
IN
= GND or V
DD
77
120
Disabled, V
IN
= GND or V
DD
0.5
1.5
I
IH
High-level input current
V
IN
=
2V
3
20
A
I
IL
Low-level input current
V
IL
=
0.8V
2
10
I
OS
Short-circuit output current
V
ODOUT +
or V
ODOUT -
= 0V
24
mA
V
OD
= 0V
12
I
OZ
High-impedance output current
V
OD
= 0V or V
CC
1
A
I
O(OFF)
Power-off output current
V
CC
= 1.5V, V
O
= 2.45V
1
C
IN
Input capacitance
V
I
= 0.4 sin (4E6 t) +0.5V
5
pF
C
O
Output capacitance
V
I
= 0.4 sin (4E6 t) +0.5V,
Disabled
9.4
5
PS8663 02/21/03
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PI90LV3811/PI90LVB3811
High-Speed Differential Line Drivers
Switching Characteristics Over Recommended Operating Conditions
(unless otherwise noted)
Notes:
1. All typical values are at 25C and with a 3.3V supply
2. t
sk(o)
is the magnitude of the time difference between the t
PLH
or t
PHL
of all drivers of a single device with all of their inputs
connected together.
3. t
sk(pp)
is the magnitude of the difference in propagation delay times between any specified terminals of two devices when both
devices operate with the same supply voltages, at the same temperature, and have identical packages and test circuits
Symbol
Parameter
Test Condition
Min.
Typ.
(1)
Max.
Units
t
PLH
Propagation delay time, low-to-high-
level output
R
L
= 50-Ohm (PI90LVB3811)
R
L
= 100-Ohm (PI90LV3811)
C
L
= 10pF
See Figure 4
0.9
1.7
2.9
ns
t
PHL
Propagation delay time, high-to-low
level output
0.9
1.6
2.9
t
r
Differential output signal rise time
0.4
0.8
1.3
t
f
Differential output signal fall time
0.4
0.8
1.3
t
sk(p)
Pulse skew ( I t
PHL
- t
PLH
I )
150
500
ps
t
sk(o)
Output skew
(2)
80
150
t
sk(pp)
Part-to-part skew
(3)
1.5
ns
t
PZH
Propagation delay time, high-
impedance to high-level output
See Figure 5
6.4
15
t
PZL
Propagation delay time, high-
impedance to low-level output
5.9
15
t
PHZ
Propagation delay time, high-level to
high-impedance output
3.5
15
t
PLZ
Propagation delay time, high-level to
low-impedance output
3.5
15
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PS8663 02/21/03
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PI90LV3811/PI90LVB3811
High-Speed Differential Line Drivers
Figure 1. Voltage and Current Definitions
Parameter Measurement Information
Figure 2. V
OD
Test Circuit
Note:
1. All input pulses are supplied by a generator having the following characteristics: t
r
or t
f
1ns, Pulse Repetition Rate
(PRR) = 50 Mpps, Pulse width = 10 0.2ns. C
L
includes instrumentation and fixture capacitance within 0.06m of the D.U.T.
The measurement of VOC(PP) is made on test equipment with a 3dB bandwidth of at least 300MHz.
Figure 3. Test Circuit & Definitions for the Driver Common-Mode Output Voltage
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PI90LV3811/PI90LVB3811
High-Speed Differential Line Drivers
Note:
1. All input pulses are supplied by a generator having the following characteristics: t
r
or t
f
1ns, Pulse Repetition Rate
(PRR) = 15 Mpps, Pulse width = 10 0.2ns. C
L
includes instrumentation and fixture capacitance within 0.06m of the D.U.T.
Figure 4. Test Circuit, Timing, & Voltage Definitions for the Differential Output Signal
Parameter Measurement Information (continued)
Note:
1. All input pulses are supplied by a generator having the following characteristics: t
r
or t
f
1ns, Pulse Repetition Rate
(PRR) = 0.5 Mpps, Pulse width = 500 10ns. C
L
includes instrumentation and fixture capacitance within 0.06m of the D.U.T.
Figure 5. Enable & Disable Time Circuit & Definitions
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PI90LV3811/PI90LVB3811
High-Speed Differential Line Drivers
V
CC
=3.3V
V
CC
=3V
V
CC
=3.6V
40
20
0
20
40
60
80
100
40
2.2
2.0
1.8
1.6
1.4
1.2
1.0
20
0
20
40
60
80
100
50
0
100
150
200
250
300
110
100
90
80
70
60
50
40
T
A
Free-Air Temperature -
C
T
A
Free-Air Temperature -
C
f Frequency MHz
V
CC
= 3.6V
V
CC
= 3.3V
I
CC
Supply Current mA
t
PHL
High-to-Lo
w Propag
r
ation Dela
y
Time - ns
t
PLH
Lo
w-to-High Propag
r
ation Dela
y
Time - ns
V
CC
= 3V
2.1
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.3
All inputs loaded & enabled
V
CC
=3V
V
CC
=3.3V
V
CC
=3.6V
Typical Characteristics
Supply Current (RMS) vs.
Switching Frequency
Low-to-High Propagation Delay Time
vs. Free-Air Temperature
High-to-Low Propagation Delay Time
vs. Free-Air Temperature
Figure 6.
Figure 7.
Figure 8.
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PS8663 02/21/03
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PI90LV3811/PI90LVB3811
High-Speed Differential Line Drivers
Pericom Semiconductor Corporation
2380 Bering Drive San Jose, CA 95131 1-800-435-2336 Fax (408) 435-1100 http://www.pericom.com
Ordering Information
e
d
o
C
g
n
i
r
e
d
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d
o
C
e
g
a
k
c
a
P
e
p
y
T
e
g
a
k
c
a
P
e
g
n
a
R
g
n
i
t
a
r
e
p
O
A
1
1
8
3
V
L
0
9
I
P
8
4
A
P
O
S
S
T
n
i
p
-
8
4
C
5
8
o
t
C
0
4
A
1
1
8
3
B
V
L
0
9
I
P
8
4
A
P
O
S
S
T
n
i
p
-
8
4
Packaging Mechanical: 48-Pin TSSOP (A)
.236
.244
.488
.496
.002
.006
SEATING PLANE
.007
.010
.0197
BSC
.004
.008
.319
1
48
12.4
12.6
6.0
6.2
0.50
0.17
0.27
8.1
0.05
0.15
0.09
0.20
X.XX
X.XX
DENOTES DIMENSIONS
IN MILLIMETERS
.018
.030
0.45
0.75
.047
1.20 Max
BSC
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