QS34XV245 [ETC]
3.3V HIGH SPEED 32-BIT MULTIWIDTH?? BUS SWITCH; 3.3V高速32位MULTIWIDTH ？总线开关
| 型号： | QS34XV245 |
| 厂家： | 
ETC |
| 描述： | 3.3V HIGH SPEED 32-BIT MULTIWIDTH?? BUS SWITCH |
| 文件： | 总7页 (文件大小：66K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
QUICKSWITCH® PRODUCTS
3.3V HIGH SPEED 32-BIT
IDTQS34XV245
MULTIWIDTH™ BUS SWITCH
FEATURES:
DESCRIPTION:
• 5Ω bidirectional switches connect inputs to outputs
• Pin compatibility with QS3245
The QS34XV245 is a set of 32-bit high speed bus switches controlled by
LVTTL-compatibleactivelowenablesignal.Whenclosed,theswitchesexhibit
nearzeropropagationdelaywithoutgeneratingadditionalgroundbounceor
switchingnoise.
• 250ps propagation delay
• Undershoot clamp diodes on all switch and control inputs
• LVTTL-compatible control inputs
• Available in 80-pin QVSOP package
TheQS34XV245isspeciallydesignedfordirectinterfacebetweeen3.3Vand
2.5Vdeviceswithoutanyexternalcomponents.Whenoperatingfroma3.3V
supply,thelogichighlevelattheswitchoutputisclampedto2.5Vwhentheswitch
inputsignalexceeds2.5V.Thisdevicecanbeusedforswitching2.5Vbuses
withoutsignalattenuation.TheONresistanceat3.3VVCC islessthan5Ωtypical,
providingnearzeropropagationdelaythroughtheswitch.AbsenceofDCpath
fromswitchI/OpinstoVCC orgroundmakesQS34XV245anidealdevicefor
hotswappingapplications.
APPLICATIONS:
• 3.3V to 2.5V Voltage translation
• 2.5V to 1.8V Voltage translation
• PCI bus isolation hot swap
TheQS34XV245ischaracterizedforoperationfrom-40°Cto+85°C.
FUNCTIONALBLOCKDIAGRAM
A0
A1
A2
A3
A4
A5
A6
A7
A16 A17 A18 A19 A20 A21 A22 A23
OE1
OE3
B16 B17 B18 B19 B20 B21 B22 B23
A24 A25 A26 A27 A28 A29 A30 A31
B0
A8
B1
B2
B3
B4
B5
B6
B7
A9 A10 A11 A12 A13 A14 A15
OE2
OE4
B24 B25 B26 B27 B28 B29 B30 B31
B8
B9 B10 B11 B12 B13 B14 B15
TheIDTlogoisaregisteredtrademarkofIntegratedDeviceTechnology,Inc.
INDUSTRIAL TEMPERATURE RANGE
NOVEMBER 1999
1
c
1999 Integrated Device Technology, Inc.
DSC-5580/1
IDTQS34XV245
3.3VHIGHSPEED32-BITMULTIWIDTHBUSSWITCH
INDUSTRIALTEMPERATURERANGE
ABSOLUTEMAXIMUMRATINGS(1)
PINCONFIGURATION
Symbol
Description
Supply Voltage to Ground
DC Switch Voltage Vs
Max
–0.5 to +4.6
–0.5 to +4.6
–0.5 to +4.6
–3
Unit
V
(2)
1
VTERM
NC
A0
80
79
78
77
Vcc
OE1
B0
(3)
2
3
VTERM
V
(3)
VTERM
DC Input Voltage VIN
V
A1
VAC
AC Input Voltage (pulse width ≤ 20ns)
DC Output Current
V
4
5
A2
B1
IOUT
PMAX
TSTG
120
mA
W
A3
B2
76
Maximum Power Dissipation (TA = 85°C)
Storage Temperature
0.92
6
A4
B3
75
74
73
–65 to +150
°C
7
A5
B4
NOTE:
8
A6
B5
1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause
permanent damage to the device. This is a stress rating only and functional operation
of the device at these or any other conditions above those indicated in the operational
sections of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect reliability.
9
A7
B6
72
71
70
69
68
10
GND
NC
B7
11
12
13
14
15
16
17
18
Vcc
OE2
B8
2. Vcc terminals.
3. All terminals except Vcc.
A8
A9
B9
A10
A11
A12
A13
A14
A15
GND
NC
67
66
65
B10
B11
B12
B13
B14
B15
Vcc
OE3
B16
64
CAPACITANCE
63
62
(TA = +25°C, f = 1.0MHZ, VIN = 0V, VOUT = 0V)
19
Pins
Typ.
Max.(1)
Unit
pF
20
21
61
Control Pins
4
5
6
7
60
59
58
57
Quickswitch Channels (Switch OFF)
pF
A16
A17
A18
A19
22
23
NOTE:
1. This parameter is measured at characterization but not tested.
24
25
26
B17
B18
B19
B20
B21
B22
B23
Vcc
56
A20
A21
55
54
53
52
PINDESCRIPTION
27
28
29
Pin Names
OE
Description
A22
A23
OutputEnable
Data I/Os
An, Bn
GND
NC
30
31
32
51
50
A24
A25
A26
A27
A28
A29
A30
A31
49
OE4
B24
B25
B26
B27
B28
B29
B30
B31
33
FUNCTIONTABLE(1)
48
47
46
34
35
OEn
Function
H
Disconnected
An = Bn
36
37
38
39
40
45
44
43
42
41
L
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
GND
MILLIPAQ
TOP VIEW
2
IDTQS34XV245
3.3VHIGHSPEED32-BITMULTIWIDTHBUSSWITCH
INDUSTRIALTEMPERATURERANGE
DCELECTRICALCHARACTERISTICSOVEROPERATINGRANGE
FollowingConditionsApplyUnlessOtherwiseSpecified:
Industrial: TA = –40°C to +85°C, VCC = 3.3V ± 0.3V
Symbol
VIH
Parameter
Input HIGH Level
Test Conditions
Guaranteed Logic HIGH for Control Pins
Guaranteed Logic LOW for Control Pins
0V ≤ VIN ≤ VCC
Min.
2
Typ.(1)
—
Max.
—
0.8
1
Unit
V
VIL
Input LOW Level
—
—
—
—
—
—
—
2.5
—
—
V
IIN
Input LeakageCurrent (Control Inputs)
Off-State Output Current (Hi-Z)
—
µA
µA
IOZ
0V ≤ VOUT ≤ VCC, Switches OFF
0.001
5
1
VCC = Min., VIN = 0V, ION = 8mA
VCC = Min., VIN = 1.7V, ION = 8mA
VCC = 2.3V, VIN = 0V, ION = 8mA
VCC = 2.3V, VIN = 1.3V, ION = 8mA
VIN = VCC = 3.3V, IOUT = -5µA
VIN = VCC = 2.5V, IOUT = -5µA
7
RON
VP
Switch ON Resistance
PassVoltage(2)
15
20
—
—
2.9
—
Ω
7
25
2.7
1.8
V
NOTES:
1. Typical values are at VCC = 3.3V, TA = 25°C.
2. Pass Voltage is guaranteed but not production tested.
POWERSUPPLYCHARACTERISTICS
Symbol
ICCQ
Parameter
TestConditions(1)
VCC = Max., VIN = GND or Vcc, f = 0
VCC = Max., VIN = 3V or Vcc, f = 0
VCC = Max., A and B pins open
Max.
Unit
µA
Quiescent Power Supply Current
Power Supply Current per Control Input HIGH (2)
Dynamic Power Supply Current per MHz(3)
12
50
∆ICC
µA
ICCD
0.15
mA/MHz
Control Inputs Toggling at 50% Duty Cycle
NOTES:
1. For conditions shown as Min. or Max., use the appropriate values specified under DC Electrical Characteristics.
2. Per TLL driven input (VIN = 3.4V, 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.
3
IDTQS34XV245
3.3VHIGHSPEED32-BITMULTIWIDTHBUSSWITCH
INDUSTRIALTEMPERATURERANGE
SWITCHINGCHARACTERISTICSOVEROPERATINGRANGE
TA = -40°C to +85°C, VCC = 3.3V ± 0.3V;
CLOAD = 50pF, RLOAD = 500Ω unless otherwise noted.
Symbol
tPLH
Parameter
Min.(1)
Typ.
Max.
Unit
DataPropagationDelay(2,3)
An to/from Bn
—
—
0.25
ns
tPHL
tPZL
SwitchTurn-onDelay
OEn to An/Bn
SwitchTurn-offDelay(2)
0.5
0.5
—
—
6.5
4
ns
ns
tPZH
tPLZ
tPHZ
OEn to An/Bn
NOTES:
1. Minimums are 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.
IN
CC
TYPICAL ON RESISTANCE vs V AT V = 3.3V
16
14
12
10
8
6
4
2
0
2.5
0.
0.5
1
1.5
2
VIN - (Volts)
4
IDTQS34XV245
3.3VHIGHSPEED32-BITMULTIWIDTHBUSSWITCH
INDUSTRIALTEMPERATURERANGE
OUTPUTVICHARACTERISTICS
V O U T (V olts)
2
3
4
1
-50
250
-100
200
150
100
50
-150
-200
-250
-300
0
0
0.5
1
2
1.5
V O U T (V olts)
Outputs High Characteristic
Outputs Low Characteristic
CC
PASS VOLTAGE vs V
3
VOUT = 2.5V @ VCC = 3.3V
VOUT = 1.8V @ VCC = 2.5V
2.5
2
1.5
3
2.2
2.4
2.7
3.3
3.6
VCC (V)
5
IDTQS34XV245
3.3VHIGHSPEED32-BITMULTIWIDTHBUSSWITCH
INDUSTRIALTEMPERATURERANGE
3.3VTO2.5VVOLTAGETRANSLATION
3.3V
VOUT
3.3V
Supply
2.5V
3.3V
2.5V
QS34XV245
2.5V
2.5V
VIN
3.3V
0V
Switch Input
2.5VTO1.8VVOLTAGETRANSLATION
2.5V
VOUT
2.5V
Supply
1.8V
2.5V
1.8V
QS34XV245
1.8V
1.8V
VIN
2.5V
0V
Switch Input
6
IDTQS34XV245
3.3VHIGHSPEED32-BITMULTIWIDTHBUSSWITCH
INDUSTRIALTEMPERATURERANGE
ORDERINGINFORMATION
XXXXX
XX
X
IDTQS
Package Process
Device Type
Industrial (-40°C to +85°C)
Blank
Q3
80-Pin MillipaQ
3.3V High Speed 32-Bit Multiwidth Bus Switch
34XV245
CORPORATE HEADQUARTERS
for SALES:
for Tech Support:
2975StenderWay
Santa Clara, CA 95054
800-345-7015 or 408-727-6116
fax: 408-492-8674
logichelp@idt.com
(408) 654-6459
www.idt.com
7
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