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PDF PI90LV044 Data sheet ( Hoja de datos )
| Número de pieza | PI90LV044 | |
| Descripción | LVDS Dual 2x2 Crosspoint/Repeater Switch | |
| Fabricantes | Pericom Semiconductor | |
| Logotipo |  |
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PI90LV044, PI90LVB044
LVDS Dual 2x2 Crosspoint/Repeater Switch
Features
• Dual 2x2 Crosspoint/Repeater Switch
• Meets or Exceeds the Requirements of
ANSI TIA/EIA-644-1995
• Designed for Signaling Rates up to 650 Mbit/s (325Mhz)
• Operates from a single 3.3V Supply: –40°C to 85°C
• Low-Voltage Differential Signaling with Output Voltages of
±350mV into:
- 100Ω load (PI90LV044)
- 50Ω load Bus LVDS Signaling (PI90LVB044)
• Accepts ±350mV differential inputs
• Wide common mode input range: 0.2V to 2.7V
• Output drivers are high impedance when disabled or
when VCC ≤ 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 VCC less than 1.5V
• TTL Inputs are 5V Tolerant
• Power Dissipation at 400 Mbit/s of 250mW
• Packaging (Pb-free & Green available):
- 28-pin QSOP (Q)
- 28-pin TSSOP (L)
Block Diagram
S0,S1
1A/1B
1DE/2DE
1Y/1Z
2A/2B
3A/3B
2Y/2Z
3Y/3Z
4A/4B
S2/S3
4Y/4Z
3DE/4DE
Description
The PI90LV044 and PI90LVB044 are monolithic dual 2x2 asyn-
chronous crosspoint/repeater switches. The crosspoint function
is based on a multiplexer tree architecture. Each 2x2 switch can
be considered as a pair of 2:1 multiplexers that share the same
inputs. The signal path through each switch is fully differential
with minimal propagation delay. The signal path is unregistered,
so no clock is required for the data inputs. The signal line drivers
and receivers use Low Voltage Differential Signaling (LVDS) to
achieve signaling rates as high as 650Mbps.
The LVDS standard provides a minimum differential output volt-
age magnitude of 247 mV into a 100Ω load and receipt of 100
mV signals with up to 1V of ground potential difference between a
transmitter and receiver. The PI90LVB044 doubles the output drive
current to achieve LVDS levels with a 50 ohm load.
The intended application of these devices is for loop-through and
redundant channel switching for both point-to-point baseband
(PI90LV044) and multipoint (PI90LVB044) data transmissions
over controlled impedance media.
Pin Configuration
1B
1A
S0
1DE
S1
2A
2B
3A
3B
S2
3DE
S3
4A
4B
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28 VCC
27 1Y
26 1Z
25 2DE
24 2Z
23 2Y
22 GND
21 VCC
20 3Y
19 3Z
18 4DE
17 4Y
16 4Z
15 GND
1
PS8485D
09/22/04
1 page  
PI90LV044, PI90LVB044
LVDS Dual 2x2 Crosspoint/Repeater Switch
Receiver/Driver Electrical Characteristics Over Recommended Operating Conditions (unless otherwise noted)
Symbol
Parameter
Test Condition
Min. Typ.(1) Max. Units
VOD
∆VOD
VOC(SS)
∆VOC(SS)
VOC(PP)
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
RL = 100Ω (LV)
RL = 50Ω (LVB)
247 440 590
mV
-50 50
1.062
1.375 V
-50 3 50
mV
150
No load
16 24
ICC Supply Current
RL = 100Ω (LV)
RL = 50Ω (LVB)
26 40
mA
42 54
All Channels Disabled
6 12
DE
IIH High level input current S1, S2, S3, S4
VIH = 5
40 nA
-3 µA
DE
IIL Low level input current S1, S2, S3, S4
VIL = 0.8V
-20 nA
10 µA
IOS Short circuit output current
VOY or VOZ = 0V,
VOD = 0V
-10 mA
IOZ High impedence output current
VOD = 600mV
VO - 0V or VCC
1.5 ±25
1.5 ±25 nA
IO(OFF) Power off output current
VCC = 0V, VO = 3.6V
1.5 ±40
CIN Input Capacitance
S0 - S3, 1DE - 4DE
3
pF
8
Note:
1. All typical values are at 25°C and with a 3.3 supply
5
PS8485D
09/22/04
5 Page 
PI90LV044, PI90LVB044
LVDS Dual 2x2 Crosspoint/Repeater Switch
Packaging Mechanical: 28-Pin QSOP (Q)
28
1
.386 9.804
.394 10.009
0.150 3.81
0.157 3.99
Guage Plane
.010
0.254
Detail A
.008
0.20
MIN.
.008
.013
0.20
0.33
.016
.035
0.41
0.89
.041
1.04
REF
0˚-6˚
.033 REF
0.84
1.35 .053
1.75 .069
SEATING
PLANE
.025
BSC
0.635
.008 0.203
.012 0.305
X.XX DENOTES DIMENSIONS
X.XX IN MILLIMETERS
.004 0.101
.010 0.254
.015 x 45˚
0.41 .016
1.27 .050
.228
.244
5.79
6.19
Detail A
.007 0.178
.010 0.254
Packaging Mechanical: 28-Pin TSSOP (L)
28
.169 4.3
.177 4.5
1
.378
.386
9.6
9.8
.0256
BSC
0.65
.007
.012
0.19
0.30
.047
1.20
Max
SEATING
PLANE
.002 0.05
.006 0.15
0.45 .018
0.75 .030
.252
BSC
6.4
.004 0.09
.008 0.20
X.XX DENOTES CONTROLLING
X.XX DIMENSIONS IN MILLIMETERS
11
PS8485D
09/22/04
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet PI90LV044.PDF ] | |
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