IDTQS34XS257Q3 [IDT]
QUICKSWITCH㈢ PRODUCTS HIGH-SPEED CMOS SYNCHROSWITCH 32:16 MUX/DEMUX; QUICKSWITCH㈢产品高速CMOS SYNCHROSWITCH 32:16复用器/解复用器
| 型号： | IDTQS34XS257Q3 |
| 厂家： | 
INTEGRATED DEVICE TECHNOLOGY |
| 描述： | QUICKSWITCH㈢ PRODUCTS HIGH-SPEED CMOS SYNCHROSWITCH 32:16 MUX/DEMUX |
| 文件： | 总9页 (文件大小：74K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
QUICKSWITCH® PRODUCTS
IDTQS34XS257
HIGH-SPEED CMOS
SYNCHROSWITCH™
32:16 MUX/DEMUX
DESCRIPTION:
FEATURES:
The QS34XS257 is a high-speed CMOS quad 32:16 multiplexer/
demultiplexer. It is organized as four independent quad 2:1 mux/demux
blocks. Portselectionandconnection, controlledbySELsignals, canbe
eitherasynchronous orsynchronous. Inthe synchronous mode, the Aor
BporttoYportconnectionis updatedonthe risingedge ofthe inputclock
CLK. Once the port-to-port connection is made, data flow can be bi-
directionalwithatypical250pspropagationdelaythroughtheswitch. Clock
Enable,overridingAsynchronous Enable,andAsynchronous Selectcon-
trols provideadditionaldesignflexibility.
• Enhanced N channel FET with no inherent diode to Vcc
• Bidirectional signal flow
• Flow-through pinout
• Zero propagation delay, zero ground bounce
• 16 banks of 2:1 Mux/Demux
• Port select synchronous to the clock
• Clock enable and asynchronous enable
• Undershoot clamp diodes on all switch and control inputs
• Asynchronous SEL option
Synchronous controls easetimingconstraints inmanyhighspeeddata
mux/demuxapplications, suchas bankinterleaving. The QS34XS257is
available inthe space-saving,80-pindual-in-line MillipaQpackage.
The QS34XS257 is characterized for operation at -40°C to +85°C.
• Break-before-make feature
• Bus-hold eliminates floating bus lines and reduces static power
consumption
• Available in 80-pin Millipaq package
APPLICATIONS:
• Memory interleaving
FUNCTIONALBLOCKDIAGRAM
SELn
CLKn
CONTROL
CLKENn
LOGIC
OEn
SYNCn
An0
Bn0
An1
Bn1
An2
Bn2
An3
Bn3
Yn0
Yn1
Yn2
Yn3
NOTE:
1. One of four blocks shown.
TheIDTlogoisaregisteredtrademarkofIntegratedDeviceTechnology,Inc.
INDUSTRIAL TEMPERATURE RANGE
JUNE 2006
1
c
2006 Integrated Device Technology, Inc.
DSC-5578/3
IDTQS34XS257
HIGH-SPEEDCMOSSYNCHROSWITCH32:16MUX/DEMUX
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)
1
2
3
80
79
78
77
VTERM
NC
A00
A01
A02
A03
B00
B01
B02
B03
GND
NC
Vcc
(3)
VTERM
V
OE0
(3)
VTERM
DC Input Voltage VIN
V
SEL0
Y00
VAC
AC Input Voltage (pulse width ≤ 20ns)
DC Output Current
V
4
5
IOUT
PMAX
TSTG
120
mA
W
° C
76
Y01
Maximum Power Dissipation (TA = 85°C)
Storage Temperature
1.16
6
75
74
73
Y02
–65 to +150
7
Y03
NOTE:
8
CLKEN0
CLK0
SYNC0
Vcc
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
72
71
70
69
68
10
11
12
13
14
15
16
17
18
2. Vcc terminals.
3. All terminals except Vcc.
A10
A11
A12
A13
B10
B11
B12
B13
GND
NC
OE1
SEL1
Y10
67
66
65
Y11
Y12
CAPACITANCE
64
Y13
(TA = +25°C, f = 1.0MHZ, VIN = 0V, VOUT = 0V)
63
62
CLKEN1
CLK1
SYNC1
Vcc
19
20
21
22
23
Pins
Typ.
Max.(1)
Unit
pF
Control Pins
4
5
7
5
7
9
61
60
59
58
57
56
Quickswitch Channels
(Switch OFF)
Demux
Mux
pF
A20
A21
A22
A23
B20
B21
B22
B23
GND
NC
OE2
NOTE:
SEL2
Y20
1. This parameter is measured at characterization but not tested.
24
25
26
Y21
55
54
53
52
Y22
PINDESCRIPTION
27
28
29
Y23
Pin Names
An0 - An3
Bn0 - Bn3
Yn0 - Yn3
SELn
I/O
I/O
I/O
I/O
I
Description
Demux Port A
CLKEN2
CLK2
SYNC2
Vcc
Demux Port B
Mux Port Y
30
31
32
51
50
SelectInput
49
A30
A31
A32
A33
B30
B31
B32
B33
GND
OE3
CLKn
I
Clock
33
48
47
46
SEL3
Y30
CLKENn
OEn
I
ClockEnable
OutputEnable
SynchronousSelectionEnable
34
35
I
SYNCn
I
Y31
36
37
38
39
40
45
44
43
42
41
Y32
Y33
CLKEN3
CLK3
SYNC3
MILLIPAQ (Q3)
TOP VIEW
2
IDTQS34XS257
HIGH-SPEEDCMOSSYNCHROSWITCH32:16MUX/DEMUX
INDUSTRIALTEMPERATURERANGE
FUNCTIONTABLE(1)
Control Inputs
Port Status
Yn2
SYNC
L
OEn
L
CLKn
↑
CLKENn
SELn
L
Yn0
An0
Bn0
Yn1
An1
Bn1
Yn3
An3
Bn3
Function
Select Port A
L
L
An2
Bn2
L
L
↑
H
Select Port B
L
H
L
↑
L
X
Nochange inMuxconnection
Nochange inMuxconnection
Nochange inMuxconnection
Switch OFF (2)
L
↑
H
H
X
X
X
X
Hold Previous Mux connection (3) (Switch ON)
Switch OFF (4)
L
H
L
↑
X
H
X
L
An0
Bn0
An1
Bn1
An2
Bn2
An3
Bn3
Select Port A
H
L
X
H
Select Port B
H
H
X
X
Nochange inMuxconnection
Hold Previous Data (Switch OFF)
NOTES:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
↑ = LOW-to-HIGH Transition
2. Mux switches are turned off. The port connection can be changed by the SEL input.
3. The contents of the “Mux select register” are unchanged and the previous Mux connection is unchanged. The output (Mux port) data state will depend on the present
data state of the input (Demux port).
4. The contents of the “Mux select register” are unchanged.
CONTROL LOGIC (1)
1
2:1
MUX
D
Q
0
2:1
MUX
0
SELn
To Port B Switches
1
CLKENn
CLKn
SYNCn
OEn
To Port A Switches
NOTE:
1. One of four blocks.
3
IDTQS34XS257
HIGH-SPEEDCMOSSYNCHROSWITCH32:16MUX/DEMUX
INDUSTRIALTEMPERATURERANGE
DCELECTRICALCHARACTERISTICSOVEROPERATINGRANGE
FollowingConditionsApplyUnlessOtherwiseSpecified:
Industrial: TA = –40°C to +85°C, VCC = 5.0V ±10%
Symbol
Parameter
Input HIGH Level
Test Conditions
Min.
Typ.(1)
Max.
Unit
VIH
Guaranteed Logic HIGH for Control Pins
2
—
—
V
VIL
IIN
Input LOW Level
Guaranteed Logic LOW for Control Pins
—
—
—
0.8
1
V
µA
Ω
Input LeakageCurrent (Control Inputs)
Switch ON Resistance(2,3)
0V ≤ VIN ≤ VCC
0.1
RON
VCC = Min., VIN = 0V, ION = 30mA
VCC = Min., VIN = 2.4V, ION =15mA
—
—
7
9
10
13
NOTES:
1. Typical values are at VCC = 5.0V, TA = 25°C.
2. Max value of RON is guaranteed but not production tested.
3. Measured by voltage drop between A/B and Y pin at indicated current through the switch.
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)
4
IDTQS34XS257
HIGH-SPEEDCMOSSYNCHROSWITCH32:16MUX/DEMUX
INDUSTRIALTEMPERATURERANGE
POWERSUPPLYCHARACTERISTICS
Symbol
ICCQ
Parameter
TestConditions(1)
VCC = Max., VCTRL = GND or Vcc, f = 0
VCC = Max., VIN = 3.4V, f = 0
Max.
12
Unit
mA
QuiescentPowerSupplyCurrent
Power Supply Current per Control Input HIGH (2)
Dynamic Power Supply Current per MHz(3)
ΔICC
1.5
mA
ICCD
VCC = Max., A/B and Y pins open
Control Inputs Toggling at 50% Duty Cycle
0.25
mA/MHz
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/B and Y pins do not contribute to ΔIcc.
3. This current applies to the control inputs only and represents the current required to switch internal capacitance at the specified frequency. The A/B and Y 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)
A/B to Y, Y to A/B
—
0.25
—
ns
tPHL
tSEC
tHEC
tCSO
tASO
tW
Clock Enable to Clock Setup Time
Clock Enable to Clock Hold Time
Clock to A, B Switch Turn-On Delay
Asynchronous Select to A, B Switch Turn-On Delay
Clock Pulse Width HIGH
3
0
—
—
—
—
—
—
—
—
—
—
7
ns
ns
ns
ns
ns
ns
0.5
0.5
3
7
—
—
—
5.2
tSCS
tHCS
Clock to SEL Setup Time
3
Clock to SEL Hold Time
0
ns
ns
tPZL
tPZH
Asynchronous Enable toSwitchTurn-OnDelay
1.5
tPLZ
tPHZ
AsynchronousEnabletoSwitchTurn-OffDelay(2)
1.5
—
4.8
ns
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 = 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.
5
IDTQS34XS257
HIGH-SPEEDCMOSSYNCHROSWITCH32:16MUX/DEMUX
INDUSTRIALTEMPERATURERANGE
TIMING WAVEFORMS - SYNCHRONOUS MODE, DEMUX FUNCTION
SYNC
tSEC tHEC
CLKEN
CLK
tSCS tHCS
tSCS tHCS
SEL
OE
Port Y
DATA 0
DATA 2
DATA 1
tPLH, tPHL
tCSO
DATA
1
Port A
Port B
DATA 0
HOLD PREVIOUS DATA, DATA 1
tPLH, tPHL
INVALID DATA
tCSO
HOLD PREVIOUS DATA, DATA 2
INVALID DATA
DATA 1 DATA 2
6
IDTQS34XS257
HIGH-SPEEDCMOSSYNCHROSWITCH32:16MUX/DEMUX
INDUSTRIALTEMPERATURERANGE
TIMING WAVEFORMS - SYNCHRONOUS MODE, MUX FUNCTION
SYNC
tSEC tHEC
CLKEN
CLK
tSCS tHCS
tSCS tHCS
SEL0, SEL1
Port A
Port D
DATA1
DATA2
INVALID DATA
tCSO
DATA3
DATA4
tCSO
tPLH,
tPHL
tPLH,
tPHL
DATA1
INVALID DATA
DATA2
DATA3
DATA4
Port Y
7
IDTQS34XS257
HIGH-SPEEDCMOSSYNCHROSWITCH32:16MUX/DEMUX
INDUSTRIALTEMPERATURERANGE
TIMING WAVEFORMS - ASYNCHRONOUS MODE, MUX FUNCTION
SYNC
SEL
OE
INVALID
DATA
Port A
DATA1
DATA2
tPLH, tPHL
tPLH, tPHL
Port B
Port Y
INVALID DATA
INVALID DATA
DATA3
tASO
tPZL, tPZH
tPLZ, tPHZ
DATA1
DATA2
DATA3
DATA3
8
IDTQS34XS257
HIGH-SPEEDCMOSSYNCHROSWITCH32:16MUX/DEMUX
INDUSTRIALTEMPERATURERANGE
ORDERINGINFORMATION
XX
IDTQS
XXXXX
X
Package
Process
Device Type
Industrial (-40°C to +85°C)
Blank
Q3
150 mil MillipaQ
Q3G
150 mil MillipaQ - Green
34XS257
High Speed CMOS SynchroSwitch 32:16 Mux/Demux
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www.idt.com
9
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