IDT IDTQS3257Q Quickswitch products high-speed cmos quickswitch quad 2:1 mux/demux Datasheet

IDTQS3257
HIGH-SPEED CMOS QUICKSWITCH QUAD 2:1 MUX/DEMUX
INDUSTRIAL TEMPERATURE RANGE
QUICKSWITCH® PRODUCTS
HIGH-SPEED CMOS
QUICKSWITCH
QUAD 2:1 MUX/DEMUX
FEATURES:
•
•
•
•
•
•
•
IDTQS3257
DESCRIPTION:
Enhanced N channel FET with no inherent diode to Vcc
Ω bidirectional switches connect inputs to outputs
5Ω
Pin compatible with the 74F257, 74FCT257, and 74FCT257T
Zero propagation delay, zero ground bounce
Undershoot clamp diodes on all switch and control inputs
TTL-compatible control inputs
Available in SOIC, QSOP, and S1 packages
The QS3257 is a high-speed CMOS LVTTL-compatible Quad 2:1
multiplexer/demultiplexer. The QS3257 is a function and pinout compatible
QuickSwitch version of the 74F257, 74FCT257, and the 74ALS/AS/LS257
Quad 2:1 multiplexers. The low ON resistance of the QS3257 allows inputs
to be connected to outputs without adding propagation delay and without
generating additional ground bounce noise.
Mux/Demux devices provide an order of magnitude faster speed than
equivalent logic devices.
The QS3257 is characterized for operation at -40°C to +85°C.
APPLICATIONS:
•
•
•
•
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Logic replacement
Video, audio, graphics switching, muxing
Hot-swapping, hot-docking
Voltage translation (5V to 3.3V)
Bus funneling
FUNCTIONAL BLOCK DIAGRAM
S
E
I0A
YA
I1A
I0B
YB
I1B
I0C
YC
I1C
I0D
YD
I1D
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
FEBRUARY 2001
1
c
2001 Integrated Device Technology, Inc.
DSC-5756/6
IDTQS3257
HIGH-SPEED CMOS QUICKSWITCH QUAD 2:1 MUX/DEMUX
ABSOLUTE MAXIMUM RATINGS(1)
PIN CONFIGURATION
S
1
16
VCC
I0A
2
15
I1A
YA
3
14
E
I0D
4
13
I0B
5
12
I1D
YD
I1B
YB
GND
6
11
I0C
7
10
9
I1C
YC
8
INDUSTRIAL TEMPERATURE RANGE
Symbol
Description
Max
Unit
VTERM(2)
Supply Voltage to Ground
–0.5 to +7
V
VTERM(3)
DC Switch Voltage Vs
–0.5 to +7
V
VTERM(3)
DC Input Voltage VIN
–0.5 to +7
V
VAC
AC Input Voltage (pulse width ≤ 20ns)
–3
V
IOUT
DC Output Current
120
mA
PMAX
Maximum Power Dissipation (TA = 85°C)
TSTG
Storage Temperature
0.5
W
–65 to +150
°C
NOTE:
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.
3. All terminals except Vcc.
CAPACITANCE
(TA = +25°C, f = 1.0MHZ, VIN = 0V, VOUT = 0V)
SOIC/ QSOP/ S1
TOP VIEW
Pins
Typ.
Max. (1)
Unit
Control Pins
4
5
pF
pF
Quickswitch Channels
Demux
5
7
(Switch OFF)
Mux
8
9
NOTE:
1. This parameter is measured at characterization but not tested.
PIN DESCRIPTION
Pin Names
I/O
Ixx
I
Description
Data Inputs
S
I
Select Input
E
I
Enable Input
YA - YD
O
Data Outputs
FUNCTION TABLE(1)
Enable
Outputs
E
S
YA
YB
YC
YD
H
X
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Disconnected
L
L
I0A
I0B
I0C
I0D
Select 0
L
H
I1A
I1B
I1C
I1D
Select 1
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don't Care
Z = High-Impedance
2
Function
IDTQS3257
HIGH-SPEED CMOS QUICKSWITCH QUAD 2:1 MUX/DEMUX
INDUSTRIAL TEMPERATURE RANGE
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
Test Conditions
VIH
Input HIGH Level
Guaranteed Logic HIGH for Control Pins
VIL
Input LOW Level
Guaranteed Logic LOW for Control Pins
IIN
Input LeakageCurrent (Control Inputs)(2) 0V ≤ VIN ≤ VCC
IOZ
Off-State Output Current (Hi-Z)
RON
Switch ON Resistance
VP
Pass Voltage(2)
Min.
Typ.(1)
Max.
Unit
2
—
—
V
—
—
0.8
V
—
—
±1
µA
0V ≤ VOUT ≤ VCC
—
—
±1
µA
VCC = Min., VIN = 0V, ION = 30mA
VCC = Min., VIN = 2.4V, ION =15mA
VIN = VCC = 5V, IOUT = -5µA
—
—
3.7
5
10
4
7
15
4.2
Ω
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
R ON
(ohms)
14
12
10
8
6
4
2
0
0.0
0.5
1.0
1.5
2.0
V IN
(Volts)
3
2.5
3.0
3.5
V
IDTQS3257
HIGH-SPEED CMOS QUICKSWITCH QUAD 2:1 MUX/DEMUX
INDUSTRIAL TEMPERATURE RANGE
POWER SUPPLY CHARACTERISTICS
Symbol
Test Conditions(1)
Parameter
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)
VCC = Max., VIN = 3.4V, f = 0
1.5
mA
ICCD
Dynamic Power Supply Current per MHz(3)
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%;
CLOAD = 50pF, RLOAD = 500Ω unless otherwise noted.
Symbol
Parameter
tPLH
Data Propagation Delay (2,3)
tPHL
Ix to Y
tPZH
Switch Turn-on Delay
tPZL
Sx to Y
tPZH
Switch Turn-on Delay
tPZL
Ex to Y
tPHZ
Switch Turn-off Delay (2)
tPLZ
Ex to Y, Sx to Y
Min. (1)
Typ.
Max.
Unit
—
—
0.25(3)
ns
0.5
—
5.2
ns
0.5
—
4.8
ns
0.5
—
5
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.
4
IDTQS3257
HIGH-SPEED CMOS QUICKSWITCH QUAD 2:1 MUX/DEMUX
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
IDTQS XXXXX
Device Type
XX
Package
SO
Q
S1
S1G
Small Outline IC
Quarter Size Outline Package
Small Outline IC
SOIC - Green
3257
High Speed CMOS Quickswitch Quad 2:1 Mux/Demux
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
5
for Tech Support:
[email protected]
(408) 654-6459
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