IDTQS3251DC8 [IDT]
Multiplexer And Demux/Decoder, F/FAST Series, 1-Func, 8 Line Input, 1 Line Output, True Output, CMOS, PDSO16, SOIC-16;
| 型号： | IDTQS3251DC8 |
| 厂家： | 
INTEGRATED DEVICE TECHNOLOGY |
| 描述： | Multiplexer And Demux/Decoder, F/FAST Series, 1-Func, 8 Line Input, 1 Line Output, True Output, CMOS, PDSO16, SOIC-16 光电二极管 逻辑集成电路 |
| 文件： | 总5页 (文件大小：75K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
QUICKSWITCH® PRODUCTS
IDTQS3251
HIGH-SPEED CMOS
QUICKSWITCH 8:1 MUX/DEMUX
DESCRIPTION:
FEATURES:
−
−
−
−
−
−
−
Enhanced N channel FET with no inherent diode to Vcc
5Ω bidirectional switches connect inputs to outputs
Pin compatible with the 74F251, 74FCT251, and 74FCT251T
Zero propagation delay, zero ground bounce
Undershoot clamp diodes on all switch and control inputs
TTL-compatible control inputs
The QS3251 is a high-speed CMOS TTL-compatible 8:1 multiplexer/
demultiplexer. The QS3251has3-stateoutputs. TheQS3251isafunction
andpinoutcompatible versionofthe 74F251,74FCT251andthe 74ALS/
AS/LS2518:1multiplexers.The lowONresistance ofthe QS3251allows
inputs tobe connectedtooutputs withoutaddingpropagationdelayand
withoutgeneratingadditionalgroundbounce noise.
Available in QSOP and SOIC Packages
Mux/Demuxdevices provide anorderofmagnitude fasterspeedthan
equivalentlogicdevices.
APPLICATIONS
The QS3251 is characterized for operation at -40°C to +85°C.
−
−
−
−
Logic replacement
Video, audio, graphics switching, muxing
Hot-swapping, hot-docking
Voltage translation (5V to 3.3V)
FUNCTIONALBLOCKDIAGRAM
S0
S1
S2
E
I0
I1
I2
I3
I4
I5
I6
I7
Y
INDUSTRIAL TEMPERATURE RANGE
FEBRUARY 2000
1
c
1999 Integrated Device Technology, Inc.
DSC-5754/-
IDTQS3251
HIGH-SPEEDCMOSQUICKSWITCH8:1MUX/DEMUX
INDUSTRIALTEMPERATURERANGE
ABSOLUTE MAXIMUM RATINGS (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
(3)
V
VTERM
(3)
VCC
I3
I2
DC Input Voltage V
V
IN
1
2
3
16
15
14
V
TERM
VAC
AC Input Voltage (pulse width ≤20ns)
V
I4
I5
IOUT
PMAX
TSTG
DC Output Current
120
mA
W
Maximum Power Dissipation (TA = 85°C)
Storage Temperature
0.5
I1
– 65 to +150 °C
I6
I0
4
5
6
13
12
11
NOTES:
SO16-1
SO16-7
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.
2. Vcc Terminals.
I7
Y
NC
S0
S1
S2
E
7
8
10
9
3. All terminals except Vcc.
GND
CAPACITANCE
(TA = +25OC, f = 1.0MHz, VIN = 0V, VOUT = 0V)
SOIC/ QSOP
TOP VIEW
Pins
Typ.
Max. (1)
Unit
Control Pins
4
5
pF
Quickswitch Channels
(Switch OFF)
Demux
Mux
5
7
pF
pF
21
23
NOTE:
1. This parameter is guaranteed but not production tested.
PIN DESCRIPTION
Pin Names
I/O
Description
FUNCTION TABLE(1)
I0 - I7
I
Data Inputs
Select Inputs
Enable Input
Data Output
Select
S0 - S2
I
I
E
S2
X
L
S1
X
L
S0
X
L
Y
Hi-Z
I0
Function
E
H
Disable
Y
O
L
S2 - S 0 = 0
S2 - S 0 = 1
S2 - S 0 = 2
S2 - S 0 = 3
S2 - S 0 = 4
S2 - S 0 = 5
S2 - S 0 = 6
S2 - S 0 = 7
L
L
L
H
L
I1
L
L
H
H
L
I2
L
L
H
L
I3
L
H
H
H
H
I4
L
L
L
H
L
I5
H
H
I6
L
H
I7
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
Z = High-Impedence
2
IDTQS3251
HIGH-SPEEDCMOSQUICKSWITCH8:1MUX/DEMUX
INDUSTRIALTEMPERATURERANGE
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Industrial: TA = -40°C to +85°C, VCC = 5.0V ± 5%
Symbol
Parameter
Input HIGH Voltage
Test Conditions
Min. Typ.(1) Max.
Unit
VIH
Guaranteed Logic HIGH for Control Pins
2
—
—
—
—
5
—
0.8
±1
±1
7
V
VIL
IIN
Input LOW Voltage
Guaranteed Logic LOW for Control Pins
0V ≤ VIN ≤ Vcc
—
—
—
—
—
3.7
V
µA
µA
Ω
Input Leakage Current (Control Inputs) (2)
Off-State Current (Hi-Z)
Switch ON Resistance
Switch ON Resistance
Pass Voltage (2)
IOZ
RON
RON
VP
0V ≤ VOUT ≤ Vcc
Vcc = Min., VIN = 0V, ION = 30mA
Vcc = Min., VIN = 2.4V, ION = 15mA
VIN = Vcc = 5V, IOUT = -5µA
10
4
15
4.2
Ω
V
NOTES:
1. Typical values are at VCC = 5.0V, TA = 25°C.
2. Pass voltage is guaranteed but not production tested.
TYPICAL ON RESISTANCE vs VIN AT VCC = 5V
16
RON
(ohms)
14
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
IDTQS3251
HIGH-SPEEDCMOSQUICKSWITCH8:1MUX/DEMUX
INDUSTRIALTEMPERATURERANGE
POWER SUPPLY CHARACTERISTICS
Symbol
Parameter
Test Conditions(1)
Max.
Unit
ICCQ
Quiescent Power Supply Current
VCC = Max., VIN = GND or Vcc, f = 0
3
µA
∆ICC
Power Supply Current per Control Input HIGH (2)
Dynamic Power Supply Current per MHz(3)
V
CC = Max., V = 3.4V, f = 0
1.5
mA
IN
ICCD
VCC = Max., I and Y 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). I and Y 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 I
and Y inputs generate no significant AC or DC currents as they transition. This parameter is guaranteed but not production tested.
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
TA = -40°C to +85°C, VCC = 5.0V ± 5%
LOAD
C
LOAD
= 50pF, R
Ω
= 500 unless otherwise noted.
Min. (1)
Typ.
Max.
Symbol
tPLH
Parameter
Unit
Data Propagation Delay (2,3)
In to Y
—
—
0.25
ns
tPHL
tPZL
Switch Turn-on Delay
Sn to Y
0.5
0.5
0.5
—
—
—
6.6
6
ns
ns
ns
tPZH
tPZL
Switch Turn-on Delay
E to Y
Switch Turn-off Delay (2)
E to Y, Sn to Y
tPZH
tPLZ
6
tPHZ
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.
4
IDTQS3251
HIGH-SPEEDCMOSQUICKSWITCH8:1MUX/DEMUX
INDUSTRIALTEMPERATURERANGE
ORDERINGINFORMATION
XX
IDTQS
XXXXX
X
Package
Process
Device Type
Industrial (-40°C to +85°C)
Blank
DC
Q
Small Outline IC (SO16-1)
Quarter Size Outline Package (SO16-7)
3251
High Speed CMOS Quickswitch 8:1 Mux/Demux
CORPORATE HEADQUARTERS
2975StenderWay
Santa Clara, CA 95054
for SALES:
800-345-7015 or 408-727-6116
fax: 408-492-8674
www.idt.com*
*To search for sales office near you, please click the sales button found on our home page or dial the 800# above and press 2.
The IDT logo, QuickSwitch, and SynchroSwitch are registered trademarks of Integrated Device Technology, Inc.
5
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