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IDTQS3V245Q 데이터시트 PDF




Integrated Device에서 제조한 전자 부품 IDTQS3V245Q은 전자 산업 및 응용 분야에서
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부품번호 IDTQS3V245Q 기능
기능 QUICKSWITCH PRODUCTS 3.3V HIGH SPEED BUS SWITCH
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IDTQS3V245Q 데이터시트, 핀배열, 회로
IDTQS3V245
3.3V HIGH SPEED BUS SWITCH
INDUSTRIALTEMPERATURERANGE
QUICKSWITCH® PRODUCTS
3.3V HIGH SPEED BUS SWITCH
IDTQS3V245
FEATURES:
• 5bi-directional switches connect inputs to outputs
• Pin compatibility with QS3245
• 250ps propagation delay
• Undershoot Clamp Diodes on all switch and control Inputs
• LVTTL-compatible control Inputs
• Available in SOIC and QSOP packages
APPLICATIONS:
• 3.3V to 2.5V voltage translation
• 2.5V to 1.8V voltage translation
• PCI bus isolation hot swap
FUNCTIONAL BLOCK DIAGRAM
DESCRIPTION:
The QS3V245 is an 8-bit high speed bus switch controlled by LVTTL-
compatible active low enable signal. When closed, the switches exhibit near
zero propagation delay without generating additional ground bounce or
switching noise.
The QS3V245 is specially designed for direct interface between 3.3V and
2.5V devices without any external components. When operating from a 3.3V
supply, the logic high level at the switch output is clamped to 2.5V when the
switch input signal exceeds 2.5V. This device can be used for switching 2.5V
buses without signal attenuation. The ON resistance at 3.3V VCC is less than
5typical, providing near zero propagation delay through the switch.
Absence of DC path from switch I/O pins to VCC or ground makes QS3V245
an ideal device for hot swapping applications.
The QS3V245 is characterized for operation from -40°C to +85°C.
2 3 4 5 6 7 89
A0 A1 A2 A3 A4 A5 A6 A7
19
OE
B0 B1 B2 B3 B4 B5 B6 B7
18 17
16 15 14 13 12 11
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
c 2000 Integrated Device Technology, Inc.
1
NOVEMBER 2000
DSC-5512/1




IDTQS3V245Q pdf, 반도체, 판매, 대치품
IDTQS3V245
3.3V HIGH SPEED BUS SWITCH
INDUSTRIALTEMPERATURERANGE
POWER SUPPLY CHARACTERISTICS
TA = –40°C to +85°C, VCC = 3.3V ±0.3V
Symbol
Parameter
Test Conditions(1)
Min. Max. Unit
ICCQ Quiescent Power Supply Current
VCC = Max., VIN = GND or VCC, f = 0
— 3 µA
ICC Power Supply Current (2) per Input HIGH
VCC = Max., VIN = 3V or VCC, f = 0 per Control Input
— 30 µA
ICCD Dynamic Power Supply Current per MHz (3) VCC = 3.3V, A and B Pins Open, Control Input Toggling
— 0.15 mA/MHz
@ 50% Duty Cycle
NOTES:
1. For conditions shown as Min. or Max., use the appropriate values specified under DC Electrical Characteristics.
2. Per TTL driven input (VIN = 3V, control inputs only). A and B pins do not contribute to Icc.
3. This current applies to the control inputs only and represents the current required to switch internal capacitance at the specified frequency. The A and B inputs generate no significant
AC or DC currents as they transition. This parameter is guaranteed but not production tested.
SWITCHING CHARACTERISTICS OVER OPERATING RANGE(1)
TA = -40°C to +85°C
Symbol
Parameter
Min. Typ.
tPLH DataPropagationDelay(2,3)
tPHL Ax to/from Bx
tPZL Switch Turn-On Delay
0.5
tPZH OE to Ax/Bx
tPLZ Switch Turn-Off Delay(2)
0.5
tPHZ OE to Ax/Bx
Max.
0.25
6.5
4
Unit
ns
ns
ns
NOTES:
1. See TEST CIRCUITS AND WAVEFORMS. Minimums guaranteed but not production tested
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 0.25ns for CL = 30pF. 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.
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IDTQS3V245Q 전자부품, 판매, 대치품
IDTQS3V245
3.3V HIGH SPEED BUS SWITCH
ORDERING INFORMATION
IDTQS XXXXX
XX
Device Type Package
INDUSTRIALTEMPERATURERANGE
SO
Q
3V245
Small Outline IC (Gull Wing)
Quarter Size Small Outline Package
3.3V High Speed Bus Switch
CORPORATE HEADQUARTERS
2975 Stender Way
Santa Clara, CA 95054
for SALES:
800-345-7015 or 408-727-6116
fax: 408-492-8674
www.idt.com
for Tech Support:
(408) 654-6459
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부품번호상세설명 및 기능제조사
IDTQS3V245

3.3V HIGH SPEED BUS SWITCH

Integrated Device
Integrated Device
IDTQS3V245Q

QUICKSWITCH PRODUCTS 3.3V HIGH SPEED BUS SWITCH

Integrated Device
Integrated Device

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