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Número de pieza | IDTQS3VH244 | |
Descripción | QUICKSWITCH PRODUCTS 2.5V / 3.3V 8-BIT HIGH BANDWIDTH BUS SWITCH | |
Fabricantes | Integrated Device | |
Logotipo | ||
Hay una vista previa y un enlace de descarga de IDTQS3VH244 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
No Preview Available ! IDTQS3VH244
2.5V / 3.3V 8-BIT HIGH BANDWIDTH BUS SWITCH
QUICKSWITCH® PRODUCTS
2.5V / 3.3V 8-BIT HIGH
BANDWIDTH BUS SWITCH
INDUSTRIALTEMPERATURERANGE
IDTQS3VH244
FEATURES:
• N channel FET switches with no parasitic diode to VCC
– Isolation under power-off conditions
– No DC path to VCC or GND
– 5V tolerant in OFF and ON state
• 5V tolerant I/Os
• Low RON - 4Ω typical
• Flat RON characteristics over operating range
• Rail-to-rail switching 0 - 5V
• Bidirectional dataflow with near-zero delay: no added ground
bounce
• Excellent RON matching between channels
• VCC operation: 2.3V to 3.6V
• High bandwidth - up to 500MHz
• LVTTL-compatible control Inputs
• Undershoot Clamp Diodes on all switch and control Inputs
• Low I/O capacitance, 4pF typical
• Available in QSOP and TSSOP packages
APPLICATIONS:
• Hot-swapping
• 10/100 Base-T, Ethernet LAN switch
• Low distortion analog switch
• Replaces mechanical relay
• ATM 25/155 switching
• Bus switching and isolation
FUNCTIONAL BLOCK DIAGRAM
DESCRIPTION:
The QS3VH244 HotSwitch is a high bandwidth, 8-bit bus switch. The
QS3VH244 hasverylowONresistance,resultinginunder250pspropagation
delay through the switch. The switches can be turned ON under the control
of the LVTTL-compatible xG signal for bidirectional data flow with no added delay
or ground bounce. In the ON state, the switches can pass signals up to 5V. In
the OFF state, the switches offer very high impedence at the terminals.
The combination of near-zero propagation delay, high OFF impedence, and
over-voltage tolerance makes the QS3VH244 ideal for high performance
communicationsapplications.
The QS3VH244 is characterized for operation from -40°C to +85°C.
1G 2G
1A1 1Y1 2A1
1A2 1Y2 2A2
1A3 1Y3 2A3
1A4 1Y4 2A4
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
c 2002 Integrated Device Technology, Inc.
1
2Y1
2Y2
2Y3
2Y4
AUGUST 2002
DSC-5894/9
1 page IDTQS3VH244
2.5V / 3.3V 8-BIT HIGH BANDWIDTH BUS SWITCH
INDUSTRIALTEMPERATURERANGE
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
TA = -40°C to +85°C
VCC = 2.5 ± 0.2V (1)
VCC = 3.3 ± 0.3V (1)
Symbol
tPLH
tPHL
tPZL
tPZH
tPLZ
tPHZ
Parameter
Data Propagation Delay(2,3)
xAx to/from xYx
Switch Turn-On Delay
xG to xAx/xYx
Switch Turn-Off Delay
xG to xAx/xYx
Min. (4)
1.5
1.5
Max. Min. (4)
0.2
8 1.5
7 1.5
Max.
0.2
7.5
7
fxG Operating Frequency - xG (2,5)
10
20
Unit
ns
ns
ns
MHz
NOTES:
1. See Test Conditions under TEST CIRCUITS AND WAVEFORMS.
2. This parameter is guaranteed but not production tested.
3. The bus switch contributes no propagation delay other than the RC delay of the ON resistance of the switch and the load capacitance. The time constant for the switch alone
is of the order of 0.2ns at CL = 50pF. Since this time constant is much smaller than the rise and fall times of typical driving signals, it adds very little propagation delay to the
system. Propagation delay of the bus switch, when used in a system, is determined by the driving circuit on the driving side of the switch and its interaction with the load on
the driven side.
4. Minimums are guaranteed but not production tested.
5. Maximum toggle frequency for xG control input (pass voltage > VCC, VIN = 5V, RLOAD ≥ 1MΩ, no CLOAD).
5
5 Page |
Páginas | Total 8 Páginas | |
PDF Descargar | [ Datasheet IDTQS3VH244.PDF ] |
Número de pieza | Descripción | Fabricantes |
IDTQS3VH244 | QUICKSWITCH PRODUCTS 2.5V / 3.3V 8-BIT HIGH BANDWIDTH BUS SWITCH | Integrated Device |
IDTQS3VH245 | 2.5V / 3.3V 8-BIT HIGH BANDWIDTH BUS SWITCH | IDT |
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