1
PS8488B 09/28/04
Features
Meets or Exceeds the Requirements of ANSI TIA/
EIA-644-1995
Designed for Signaling Rates up to 650 Mbit/s (325 MHz)
Operates from a 3.3V Supply: 40C to +85C
Low Voltage Differential Signaling with Output Voltages
of 350mV into:
- 100 Ohm load (PI90LV022)
- 50 Ohm load Bus LVDS Signaling (PI90LVB022)
Accepts 350mV differential inputs
Wide common mode input voltage range: 0.2V to 2.7V
Output drivers are high impedance when disabled or
when V
CC
1.5V
Inputs are open, short, and terminated fail safe
Propagation Delay Time: 3.5ns
ESD protection is 10kV on bus pins
Bus Pins are High Impedance when disabled or
with V
CC
less than 1.5V
TTL Inputs are 5V I/O Tolerant
Power Dissipation at 400Mbit/s less than 150mW
Industrial temperature rating
Packaging (Pb-free & Green available):
- 16-pin SOIC (W)
- 16-pin TSSOP (L)
Description
The PI90LV022 and PI90LVB022 are differential line drivers and
receivers that use Low Voltage Differential Signaling (LVDS) to
achieve signaling rates as high as 650 Mbps. The receiver outputs
can be switched to either or both drivers through the multiplexer
control signals S0 and S1. This allows the flexibility to perform
splitter or signal routing functions with a single device.
The LVDS standard provides a minimum differential output voltage
magnitude of 247mV into a 100 Ohm load and receipt of 100mV DC
signals with up to 1V of ground potential difference between a
transmitter and receiver. The PI90LVB022 doubles the output drive
current to achieve Bus LVDS signaling levels with a 50 Ohm load.
A doubly terminated Bus LVDS line enables multi-point configura-
tions. Switching between channels does not create false transitions
on the outputs.
The intended application of these devices and signaling technique
is for both point-to-point base-band (PI90LV022) and multipoint
(PI90LVB022) data transmissions over controlled impedance media.
Block Diagram
Pin Configuration
1A
1B
+
2A
2B
+
1DE
1Y
1Z
2Y
2Z
2DE
S0 S1
1B
1A
S0
1DE
S1
2A
2B
GND
V
CC
V
CC
1Y
1Z
2DE
2Z
2Y
GND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
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PI90LV022, PI90LVB022
LVDS Mux/Repeater
16-Pin
L,W
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PI90LV022, PI90LVB022
LVDS Mux / Repeater
2
PS8488B 09/28/04
Figure 1. Possible Signal Routing
T
U
P
N
I
T
U
P
T
U
O
N
O
I
T
C
N
U
F
1
S
0
S
Z
1
/
Y
1
Z
2
/
Y
2
0
0
B
1
/
A
1
B
1
/
A
1
r
e
tt
il
p
S
0
1
B
2
/
A
2
B
2
/
A
2
r
e
tt
il
p
S
1
0
B
1
/
A
1
B
2
/
A
2
r
e
t
u
o
R
1
1
B
2
/
A
2
B
1
/
A
1
r
e
t
u
o
R
Table 1. MUX Truth Table
Note: Setting nDE to 0 will set Ouput nY/nZ to High Impedance.
S1 / S0
1A / 1B
2A / 2B
S1 / S0
1A / 1B
2A / 2B
1DE / 2DE
1Y / 1Z
2Y / 2Z
1DE / 2DE
1Y / 1Z
2Y / 2Z
Cross Point
Router
Pass Through
Router
S1, S0
1A, 1B
2A, 2B
S1, S0
1A, 1B
2A, 2B
1DE, 2DE
1Y, 1Z
2Y, 2Z
1DE, 2DE
1Y, 1Z
2Y, 2Z
Splitter A
Splitter B
Splitter Options
Router Options
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PI90LV022, PI90LVB022
LVDS Mux / Repeater
3
PS8488B 09/28/04
Supply Voltage Range, V
CC
(1) ...............................................................................
0.5V to 4V
Voltage Range (DE, S0, S1) ...................................................................... 0.5 to 6V
Input Voltage Range, V
I
(A or B) ............................................ 0.5V to V
CC
+ 0.5V
Electrostatic Discharge: A, B, Y, Z, and GND
(2) ................
Class 3, A: 16kV, B:600V
All Pins ............................................ Class 3, A: 7kV, B:500V
Storage Temperature Range.............................................................. 65C to 150C
Lead Temperature 1, 6 mm (1/16 inch) from case for 10 seconds ................... 260C
Absolute Maximum Ratings Over Operating Free-Air Temperature
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 "Recommended Operating
Conditions" is not implied. Exposure to Absolute-Maximum-Rated conditions for extended
periods may affect device reliability.
Recommended Operating Conditions
.
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A
0
4
5
8
C
2.4
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
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PI90LV022, PI90LVB022
LVDS Mux / Repeater
4
PS8488B 09/28/04
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(
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V
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C
V
0
=
0
2
Receiver Electrical Characteristics Over Recommended Operating Conditions
(unless otherwise noted)
Figure 2. Common-Mode Input Voltage vs. Differential Voltage
2.5
2
1.5
1
0.5
0
0.1
0.2
0.3
0.4
0.5
0.6
MAX at V
CC
> 3.15V
MAX at V
CC
= 3V
MIN
VID Differential Input Voltage V
V
IC
Common-Mode Input
V
o
lta
g
e
V
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PI90LV022, PI90LVB022
LVDS Mux / Repeater
5
PS8488B 09/28/04
l
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b
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=
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=
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6
=
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3
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C
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3
F
p
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D
2
,
E
D
1
,
1
S
,
0
S
8
Receiver/Driver Electrical Characteristics Over Recommended Operating Conditions
(unless otherwise noted)
Note:
1. All typical values are at 25C and with a 3.3 supply
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