IDTQS34XR245 [IDT]
QUICKSWITCH PRODUCTS HIGH-SPEED CMOS QUICKSWITCH 32-BIT LOW RESISTANCE MULTIWIDTHTM BUS SWITCHES; 快速切换产品高速CMOS快速切换32位低电阻MULTIWIDTHTM总线开关
| 型号： | IDTQS34XR245 |
| 厂家： | 
INTEGRATED DEVICE TECHNOLOGY |
| 描述： | QUICKSWITCH PRODUCTS HIGH-SPEED CMOS QUICKSWITCH 32-BIT LOW RESISTANCE MULTIWIDTHTM BUS SWITCHES |
| 文件： | 总5页 (文件大小：60K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
QUICKSWITCH PRODUCTS
HIGH-SPEED CMOS QUICK-
IDTQS34XR245
SWITCH 32-BIT LOW RESISTANCE
MULTIWIDTHTM BUS SWITCHES
FEATURES:
DESCRIPTION:
• Enhanced N channel FET with no inherent diode to Vcc
• 2.5Ω bidirectional switches connect inputs to outputs
• Zero propagation delay, zero ground bounce
• QS34XR245Q3 is a 32-bit version of QS3R245
• Flow-through pinout for easy layout
The QS34XR245 is a member of the MultiWidthTM family of QuickSwitch
devicesandprovidesasetof32high-speedlowresistanceCMOScompatible
busswitchesinaflow-throughpinout.
ThisdeviceisavailableintheMillipaQpackage,theworldsfirstsmalloutline
32-bitsolution.Thelowon-resistanceoftheQS34XR245allowsinputstobe
connectedtooutputswithoutaddingpropagationdelayandwithoutgenerating
additionalgroundbouncenoise.WhenOutputEnable(OEx)islow,theswitches
areturnedon,connectingbusAtobusB.WhenOExishigh,theswitchesare
turnedoff.
• Undershoot clamp diodes on all switch and control inputs
• TTL-compatible control inputs
• Available in 80-pin Millipaq package
The QS34XR245 is ideally suited for 32/64 bit applications where board
spaceisatapremium.ThelowresistanceofQS34XR245makesitidealforPCI
hotdockingapplication.
QuickSwitch devices provide an order of magnitude faster speed than
conventionallogicdevices.
APPLICATIONS:
• Low resistance applications
• Hot-swapping, hot-docking (low resistance for PCI and
Compact PCI applications)
• Bus switching, isolation
• Logic replacement (data processing)
• Capacitance reduction and isolation
• Power conservation
• Clock gating
• Voltage translation (5V to 3.3V)
FUNCTIONALBLOCKDIAGRAM
A0
A1
A2
A3
A4
A5
A6
A7
A16
A17
A18
A19
A20
A21
A22
A23
OE1
OE3
B0
B1
B2
B3
B4
B5
B6
B7
B16
B17
B18
B19
B20
B21
B22
B23
A8
A9
A10
A11
A12
A13
A14
A15
A24
A25
A26
A27
A28
A29
A30
A31
OE2
OE4
B8
B9
B10
B11
B12
B13
B14
B15
B24
B25
B26
B27
B28
B29
B30
B31
TheIDTlogoisaregisteredtrademarkofIntegratedDeviceTechnology,Inc.
INDUSTRIAL TEMPERATURE RANGE
NOVEMBER 1999
1
c
1999 Integrated Device Technology, Inc.
DSC-5544/1
IDTQS34XR245
HIGHSPEEDCMOSQUICKSWITCH32-BITLOWRESISTANCEBUSSWITCH
INDUSTRIALTEMPERATURERANGE
ABSOLUTEMAXIMUMRATINGS(1)
PINCONFIGURATION
Symbol
Description
Supply Voltage to Ground
DC Switch Voltage Vs
Max
–0.5 to +7
–0.5 to +7
–0.5 to +7
–3
Unit
V
(2)
VTERM
1
NC
80
VCC
(3)
VTERM
V
2
3
4
5
6
7
A0
A1
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
OE1
B0
(3)
VTERM
DC Input Voltage VIN
V
VAC
AC Input Voltage (pulse width ≤ 20ns)
DC Output Current
V
A2
B1
IOUT
PMAX
TSTG
120
mA
W
A3
B2
Maximum Power Dissipation (TA = 85°C)
Storage Temperature
1.4
A4
B3
–65 to +150
°C
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
10
11
12
13
14
15
16
17
18
19
20
21
22
GND
NC
A8
B7
VCC
OE2
B8
2. Vcc terminals.
3. All terminals except Vcc.
A9
A10
A11
A12
A13
A14
A15
GND
NC
A16
A17
A18
A19
A20
A21
A22
A23
GND
NC
A24
A25
A26
A27
A28
A29
A30
A31
GND
B9
B10
B11
B12
B13
B14
B15
VCC
CAPACITANCE
(TA = +25°C, f = 1.0MHZ, VIN = 0V, VOUT = 0V)
62
61
60
59
58
57
56
55
Pins
Typ.
Max.(1)
Unit
pF
Control Pins
3
7
4
8
Quickswitch Channels (Switch OFF)
pF
OE3
B16
23
24
25
NOTE:
1. This parameter is measured at characterization but not tested.
B17
B18
B19
B20
B21
B22
26
27
28
29
PINDESCRIPTION
54
53
52
51
50
49
48
47
Pin Names
OEx
Description
OutputEnable
Data I/Os
Ax, Bx
30
31
32
B23
VCC
OE4
B24
B25
B26
B27
B28
B29
B30
B31
33
34
35
36
37
38
FUNCTIONTABLE(1)
OE1x
Function
Disconnect
Ax = Bx
46
45
44
43
42
41
H
L
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
39
40
MILLIPAQ (Q3)
TOP VIEW
2
IDTQS34XR245
HIGHSPEEDCMOSQUICKSWITCH32-BITLOWRESISTANCEBUSSWITCH
INDUSTRIALTEMPERATURERANGE
DCELECTRICALCHARACTERISTICSOVEROPERATINGRANGE
FollowingConditionsApplyUnlessOtherwiseSpecified:
Industrial: TA = –40°C to +85°C, VCC = 5.0V ±10%
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.
—
Unit
V
VIL
Input LOW Level
—
—
0.8
±1
±1
5
V
IIN
Input LeakageCurrent (Control Inputs)
Off-State Output Current (Hi-Z)
Switch ON Resistance(2)
—
—
µA
µA
Ω
IOZ
0V ≤ VOUT ≤ VCC, Switches OFF
—
—
RON
VCC = Min., VIN = 0V, ION = 30mA
VCC = Min., VIN = 2.4V, ION =15mA
VIN = VCC = 5V, IOUT = -5µA
—
2.5
4
—
8.5
4.3
VP
PassVoltage(3)
3.7
4
V
NOTES:
1. Typical values are at VCC = 5.0V, TA = 25°C.
2. Max value of RON is guaranteed but not production tested.
3. Pass Voltage is guaranteed but not production tested.
TYPICAL ON RESISTANCE vs VIN AT VCC = 5V
16
14
RON
(ohms)
12
10
8
6
4
2
0
1.5
2.0
2.5
3.0
3.5
1.0
0.0
0.5
VIN
(Volts)
3
IDTQS34XR245
HIGHSPEEDCMOSQUICKSWITCH32-BITLOWRESISTANCEBUSSWITCH
INDUSTRIALTEMPERATURERANGE
POWERSUPPLYCHARACTERISTICS
Symbol
ICCQ
Parameter
TestConditions(1)
VCC = Max., VIN = GND or Vcc, f = 0
VCC = Max., VIN = 3.4V, f = 0
Max.
12
Unit
µA
Quiescent Power Supply Current
Power Supply Current per Control Input HIGH (2)
Dynamic Power Supply Current per MHz(3)
∆ICC
2.5
mA
ICCD
VCC = Max., A and B pins open
0.25
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.
SWITCHINGCHARACTERISTICSOVEROPERATINGRANGE
TA = -40°C to +85°C, VCC = 5.0V ± 10%;
CLOAD = 50pF, RLOAD = 500Ω unless otherwise noted.
Symbol
tPLH
Parameter
Min.(1)
Typ.
Max.
Unit
DataPropagationDelay(2,3)
Ax to/from Bx
—
—
0.12
ns
tPHL
tPZL
SwitchTurn-onDelay
OE to Ax/Bx
SwitchTurn-offDelay(2)
0.5
0.5
—
—
5.6
4.5
ns
ns
tPZH
tPLZ
tPHZ
OE to Ax/Bx
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 0.12ns 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.
4
IDTQS34XR245
HIGHSPEEDCMOSQUICKSWITCH32-BITLOWRESISTANCEBUSSWITCH
INDUSTRIALTEMPERATURERANGE
ORDERINGINFORMATION
XXXXX
XX
X
IDTQS
Package Process
Device Type
Industrial (-40°C to +85°C)
Blank
80-Pin MillipaQ
Q3
High Speed CMOS 32-Bit Low Resitance
34XR245
MultiWidth Bus Switch
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
5
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