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PDF QS3VH245PA Data sheet ( Hoja de datos )
| Número de pieza | QS3VH245PA | |
| Descripción | IDTQS3VH245PA | |
| Fabricantes | IDT | |
| Logotipo |  |
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IDTQS3VH245
2.5V / 3.3V 8-BIT HIGH BANDWIDTH BUS SWITCH
QUICKSWITCH® PRODUCTS
2.5V / 3.3V 8-BIT HIGH
BANDWIDTH BUS SWITCH
INDUSTRIALTEMPERATURERANGE
IDTQS3VH245
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, SOIC, 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:
TheQS3VH245 HotSwitch8-bitbusswitchisahighbandwidthbusswitch.
The QS3VH245 has very low ON resistance, resulting in under 250ps
propagation delay through the switch. The switches can be turned ON under
thecontroloftheLVTTL-compatibleOutputEnable signalforbidirectionaldata
flow with no added delay or ground bounce. In the ON state, the switches can
passsignalsupto5V. IntheOFFstate,theswitchesofferveryhighimpedence
at the terminals.
The combination of near-zero propagation delay, high OFF impedance, and
over-voltage tolerance makes the QS3VH245 ideal forhigh performance
communicationsapplications.
The QS3VH245 is characterized for operation from -40°C to +85°C.
A0 A1 A2 A3 A4 A5 A6 A7
OE
B0 B1 B2 B3 B4 B5 B6 B7
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
c 2003 Integrated Device Technology, Inc.
1
MARCH 2003
DSC-5775/6
Free Datasheet http://www.Datasheet-PDF.com/
1 page  
IDTQS3VH245
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)
Ax to/from Bx
Switch Turn-On Delay
OE to Ax/Bx
Switch Turn-Off Delay
OE to Ax/Bx
Min. (4)
1.5
1.5
Max. Min. (4)
0.2
8 1.5
7 1.5
Max.
0.2
7
6.5
fOE Operating Frequency - Enable(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 OE control input (pass voltage > VCC, VIN = 5V, RLOAD ≥ 1MΩ, no CLOAD).
5
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5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet QS3VH245PA.PDF ] | |
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