Enhanced N channel FET with no inherent diode to Vcc
5Ω bidirectional switches connect inputs to outputs
Pin compatible with the 74F253, 74FCT253, and 74FCT253T
Zero propagation delay, zero ground bounce
Undershoot clamp diodes on all switch and control inputs
TTL-compatible control inputs
25Ω resistors for low noise
Available in QSOP and SOIC Packages
IDTQS32253
DESCRIPTION:
The QS32253 is a high-speed CMOS TTL-compatible dual 4:1 multi-
plexer/demultiplexer with 3-state outputs. The QS32253 is function and
pinout compatible version of the 74F253, 74FCT253, and the 74ALS/AS/
LS253 dual 4:1 multiplexers. The QS32253 has 25Ω resistors to reduce
ground bounce noise.
Mux/Demux devices provide an order of magnitude faster speed than
equivalent logic devices.
The QS32253 is characterized for operation at -40°C to +85°C.
APPLICATIONS
−
−
−
−
−
−
Logic replacement
Video, audio, graphics switching, muxing
Hot-swapping, hot-docking
Voltage translation (5V to 3.3V)
Power conservation
Bus funneling
FUNCTIONAL BLOCK DIAGRAM
S
0
S
1
EA
EB
I
0A
I
1A
Y
A
I
2A
I
3A
I
0B
Y
B
I
1B
I
2B
I
3B
INDUSTRIAL TEMPERATURE RANGE
1
c
1999
Integrated Device Technology, Inc.
APRIL 2000
DSC-5749/-
IDTQS32253
HIGH-SPEED CMOS QUICKSWITCH DUAL 4:1 MUX/DEMUX
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS
Symbol
V
TERM(2)
V
TERM(3)
Description
Supply Voltage to Ground
DC Switch Voltage V
S
DC Input Voltage V
IN
AC Input Voltage (pulse width
≤20ns)
DC Output Current
Maximum Power Dissipation (T
A
= 85°C)
Storage Temperature
(1)
Unit
V
V
V
V
mA
W
°C
Max.
– 0.5 to +7
– 0.5 to +7
– 0.5 to +7
-3
120
0.5
– 65 to +150
EA
S
1
I
3A
I
2A
I
1A
I
0A
Y
A
G ND
1
2
3
4
5
6
7
8
16
15
14
SO 16-1 13
SO 16-7 12
11
10
9
V
CC
EB
S
0
I
3B
I
2B
I
1B
I
0B
Y
B
V
TERM(3)
V
AC
I
OUT
P
MAX
T
STG
NOTES:
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
(T
A
= +25
O
C, f = 1.0MHz, V
IN
= 0V, V
OUT
= 0V)
Pins
Control Pins
Quickswitch Channels
(Switch OFF)
Demux
Mux
Typ.
4
5
14
Max.
(1)
5
7
16
Unit
pF
pF
pF
SOIC/ QSOP
TOP VIEW
NOTE:
1. This parameter is guaranteed but not production tested.
PIN DESCRIPTION
Pin Names
Ixx
S
0
, S
1
EA, EB
Y
A
, Y
B
I/O
I
I
I
O
Description
Data Inputs
Select Inputs
Enable Inputs
Data Outputs
FUNCTION TABLE
(1)
Enable
EA
H
X
L
L
L
L
EB
X
H
L
L
L
L
S
1
X
X
L
L
H
H
Select
S
0
X
X
L
H
L
H
Y
A
Hi-Z
X
I
0A
I
1A
I
2A
I
3A
Outputs
Y
B
X
Hi-Z
I
0B
I
1B
I
2B
I
3B
Function
Disconnected
Disconnected
S
1 - 0
= 0
S
1 - 0
= 1
S
1 - 0
= 2
S
1 - 0
= 3
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
Z = High-Impedence
2
IDTQS32253
HIGH-SPEED CMOS QUICKSWITCH DUAL 4:1 MUX/DEMUX
INDUSTRIAL TEMPERATURE RANGE
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Industrial: T
A
= -40°C to +85°C, V
CC
= 5.0V ± 5%
Symbol
V
IH
V
IL
I
IN
I
OZ
R
ON
R
ON
V
P
Parameter
Input HIGH Voltage
Input LOW Voltage
Input Leakage Current (Control Inputs)
(2)
Off-State Current (Hi-Z)
Switch ON Resistance
Switch ON Resistance
Pass Voltage
(2)
Test Conditions
Guaranteed Logic HIGH for Control Pins
Guaranteed Logic LOW for Control Pins
0V
≤
V
IN
≤
Vcc
0V
≤
V
OUT
≤
Vcc
Vcc = Min., V
IN
= 0V, I
ON
= 30mA
Vcc = Min., V
IN
= 2.4V, I
ON
= 15mA
V
IN
= Vcc = 5V, I
OUT
= -5µA
Min.
2
—
—
—
20
20
3.7
Typ.
(1)
—
—
—
—
28
35
4
Max.
—
0.8
±1
±1
40
48
4.2
Unit
V
V
µA
µA
Ω
Ω
V
NOTES:
1. Typical values are at V
CC
= 5.0V, T
A
= 25°C.
2. Pass voltage is guaranteed but not production tested.
TYPICAL ON RESISTANCE vs V
IN
AT V
CC
= 5V
80
R
ON
(ohms)
70
60
50
40
30
20
10
0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
V
IN
(Volts)
3
IDTQS32253
HIGH-SPEED CMOS QUICKSWITCH DUAL 4:1 MUX/DEMUX
INDUSTRIAL TEMPERATURE RANGE
POWER SUPPLY CHARACTERISTICS
Symbol
I
CCQ
∆I
CC
I
CCD
Parameter
Quiescent Power Supply Current
Power Supply Current per Control Input HIGH
(2)
Dynamic Power Supply Current per MHz
(3)
Test Conditions
(1)
V
CC
= Max., V
IN
= GND or Vcc, f = 0
V
CC
= Max., V
IN
= 3.4V, f = 0
V
CC
= Max., I and Y pins open
Control Inputs Toggling at 50% Duty Cycle
Max.
3
1.5
0.25
Unit
µA
mA
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 (V
IN
= 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
T
A
= -40°C to +85°C, V
CC
= 5.0V ± 5%
C
LOAD
= 50pF, R
LOAD
= 500Ω unless otherwise noted.
Symbol
t
PLH
t
PHL
t
PZL
t
PZH
t
PZL
t
PZH
t
PLZ
t
PHZ
Parameter
Data Propagation Delay
(2,3)
In to Y
Switch Turn-on Delay
Sn to Y
Switch Turn-on Delay
EN
to Y
Switch Turn-off Delay
(2)
EN
to Y, Sn to Y
Min.
(1)
—
0.5
0.5
0.5
Typ.
—
—
—
—
Max.
1.25
(3)
7
7
6
Unit
ns
ns
ns
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 1.25ns for C
L
= 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
IDTQS32253
HIGH-SPEED CMOS QUICKSWITCH DUAL 4:1 MUX/DEMUX
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
IDTQS
XXXXX
Device Type
XX
Package
X
Process
Blank
Industrial (-40°C to +85°C )
Q
SO
Quarter Size Outline Package (SO16-7)
Small Outline IC (SO16-1)
32253
High Speed CMOS Quickswitch Dual 4:1 Mux/Demux
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for SALES:
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www.idt.com*
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