21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI90LV022, PI90LVB022
LVDS Mux/Repeater
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: –40°C to +85°C
• 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
• Available Packaging: 16-pin SOIC and 16-pin TSSOP
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
1DE
1A
1B
+
–
1Y
1Z
1B
1A
S0
1DE
1
2
3
16
15
14
V
CC
V
CC
1Y
1Z
2DE
2Z
2Y
GND
16-Pin
4
L,W
13
5
6
7
8
12
11
10
9
2A
2B
+
–
2Y
2Z
2DE
S1
2A
2B
GND
S0 S1
1
PS8488A
03/27/01
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI90LV022, PI90LVB022
LVDS Mux / Repeater
Table 1. MUX Truth Table
INPUT
S1
0
0
1
1
S0
0
1
0
1
OUTPUT
1Y/1Z
1A/1B
2A/2B
1A/1B
2A/2B
2Y/2Z
1A/1B
2A/2B
2A/2B
1A/1B
FUNCTION
Splitter
Splitter
Router
Router
Note:
Setting
nDE
to 0 will set Ouput
nY/nZ
to High Impedance.
S1 / S0
1A / 1B
1DE / 2DE
1Y / 1Z
Cross Point
Router
2A / 2B
2Y / 2Z
S1 / S0
1A / 1B
1DE / 2DE
1Y / 1Z
Pass Through
Router
2A / 2B
2Y / 2Z
Router Options
S1, S0
1A, 1B
1DE, 2DE
1Y, 1Z
Splitter A
2A, 2B
2Y, 2Z
S1, S0
1A, 1B
1DE, 2DE
1Y, 1Z
Splitter B
2A, 2B
2Y, 2Z
Splitter Options
Figure 1. Possible Signal Routing
2
PS8488A
03/27/01
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI90LV022, PI90LVB022
LVDS Mux / Repeater
Absolute Maximum Ratings Over Operating Free-Air Temperature
†
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 .............................................................. –65°C to 150°C
Lead Temperature 1, 6 mm (1/16 inch) from case for 10 seconds ................... 260°C
†
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.
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
M in.
Supply Voltage, V
CC
High- Level Input Voltage, V
IH
Low- Level Input Voltage, V
IL
Magnitude of Differential Input Voltage
V
ID
S0, S1, 1DE, 2DE
S0, S1, 1DE, 2DE
0.1
V
ID
Common- Mode input Voltage, V
IC
(see Figure 2)
2
2.4 –
Nom.
3.3
M ax.
3.6
Units
3.0
2
0.8
0.6
V
ID
2
V
V
CC
–0.8
Operating free- air temperature, T
A
–40
85
°C
3
PS8488A
03/27/01
VIC – Common-Mode Input Voltage – V
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI90LV022, PI90LVB022
LVDS Mux / Repeater
2.5
MAX at V
CC
> 3.15V
2
MAX at V
CC
= 3V
1.5
1
0.5
MIN
0
0.1
0.2
0.3
0.4
0.5
0.6
VID – Differential Input Voltage – V
Figure 2. Common-Mode Input Voltage vs. Differential Voltage
Receiver Electrical Characteristics Over Recommended Operating Conditions
(unless otherwise noted)
Symbol
V
ITH+
V
ITH–
I
I
I
I (OFF)
Parame te r
Positive- going differential input voltage threshold
V
CM
= 1.2V
Negative- going differential input voltage threshold
V
I
= 0V
Input current (A or B inputs)
V
I
= 2.4V
Power- off input current (A or B inputs)
V
CC
= 0V
–1.2
20
–100
–2
–20
µA
Te s t Conditions
M in.
Typ.
(1)
M ax.
100
mV
Units
4
PS8488A
03/27/01
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI90LV022, PI90LVB022
LVDS Mux / Repeater
Receiver/Driver Electrical Characteristics Over Recommended Operating Conditions
(unless otherwise noted)
Symbol
V
OD
∆V
OD
V
OC(SS)
∆V
OC(SS)
V
OC(PP)
Parame te r
Differential output voltage magnitude
Change in differential output voltage magnitude
between logic states
Steady- state common- mode output voltage
Change in steady- state common- mode output
voltage between logic states
Peak- to- peak common- mode output voltage
No Load
I
CC
Supply current
R
L
= 100 Ohm (LV022)
R
L
= 50 Ohm (LVB022)
Both Channels Disabled
I
H
High- level input current
DE
S 0, S 1
DE
S 0, S 1
V
IH
= 5
8
13
21
3
R
L
= 50 Ohm
(LVB022)
See Fig. 4
R
L
= 100 Ohm
(LV022)
See Fig. 3
Te s t Conditions
M in.
247
–50
1. 12 5
–50
3
Typ.
(1)
440
M ax.
590
50
1. 3 7 5
50
150
12
20
27
6
40
–3
–20
10
–10
–10
–10
–10
1.5
1.5
1.5
3
S0, S1, 1DE, 2DE
8
±25
±25
±40
pF
nA
mA
nA
µA
nA
µA
mA
mV
V
mV
Units
I
IL
Low- level input current
V
IL
= 0.8V
V
OY
or V
OZ
= 0V,
V
OD
= 0V (LV022)
I
OS
Short- circuit output current
V
OY
or V
OZ
= 0V,
V
OD
= 0V (LVB022)
I
OZ
I
O(OFF)
C
IN
High- Impedence output current
Power- off output current
Input capacitance
V
OD
= 600mV
V
O
= 0V or V
CC
V
CC
= 0V, V
O
= 3.6V
Note:
1. All typical values are at 25°C and with a 3.3 supply
5
PS8488A
03/27/01
