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IDTQS3306A
HIGH-SPEED CMOS DUAL BUS SWITCH WITH INDIVIDUAL ENABLES
INDUSTRIAL TEMPERATURE RANGE
NOVEMBER 1999
1999 Integrated Device Technology, Inc.
DSC-5577/2
c
INDUSTRIAL TEMPERATURE RANGE
FEATURES:
Enhanced N channel FET with no inherent diode to Vcc
Very low ON resistance (5
typical)
Zero propagation delay, zero added ground bounce
Fast turn-on/turn-off time
Undershoot clamp diodes on all switch and control inputs
Available in SOIC package
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
APPLICATIONS:
Line control
Hot-swapping, hot-docking
Voltage translation (5V to 3.3V)
Power conservation
Capacitance reduction and isolation
Clock gating
Bus isolation
Signal suppression/blanking
IDTQS3306A
FUNCTIONAL BLOCK DIAGRAM
QUICKSWITCH
PRODUCTS
HIGH-SPEED CMOS DUAL
BUS SWITCH WITH INDIVIDUAL
ACTIVE LOW ENABLES
DESCRIPTION:
The QS3306A provides a set of two high-speed low resistance (3
typical) CMOS switches connecting inputs to outputs without propagation
delay and without generating additional ground bounce noise. Individual
enables (OE) are used to turn on the switches. The QS3306A is ideal for
signal and control switching since the device adds no noise, ground bounce,
propagation delay, or significant power consumption to the system. The
QS3306A can also be used for analog switching applications such as video.
The QS3306A is characterized for operation at -40C to +85C.
1O E
2O E
1A
2A
1B
2B
2
INDUSTRIAL TEMPERATURE RANGE
IDTQS3306A
HIGH-SPEED CMOS DUAL BUS SWITCH WITH INDIVIDUAL ENABLES
PIN CONFIGURATION
SOIC (S1)
TOP VIEW
Symbol
Description
Max
Unit
V
TERM
(2)
Supply Voltage to Ground
0.5 to +7
V
V
TERM
(3)
DC Switch Voltage V
S
0.5 to +7
V
V
TERM
(3)
DC Input Voltage V
IN
0.5 to +7
V
V
AC
AC Input Voltage (pulse width
20ns)
3
V
I
OUT
DC Output Current
120
mA
P
MAX
Maximum Power Dissipation
0.5
W
T
STG
Storage Temperature
65 to +150
C
ABSOLUTE MAXIMUM RATINGS
(1)
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don't Care
xOE
xA
xB
Function
L
H
H
Connect
L
L
L
Connect
H
X
X
Disconnect
FUNCTION TABLE
(1)
Pins
Typ.
Max.
(1)
Unit
OE (Inputs)
3
5
pF
Quickswitch Channels (Switch OFF)
5
7
pF
CAPACITANCE
(T
A
= +25C, f = 1MHz, V
IN
= 0V, V
OUT
= 0V)
NOTE:
1. This parameter is guaranteed but not production tested.
Pin Names
I/O
Description
1
A -
2
A
I/O
Bus A
1
B -
2
B
I/O
Bus B
1OE - 2OE
I
Switch Enable
PIN DESCRIPTION
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. V
CC
terminals.
3. All terminals except V
CC
.
Vcc
2
OE
8
7
5
6
1
2
3
4
1
A
1
B
2
A
2
B
1
OE
GND
3
IDTQS3306A
HIGH-SPEED CMOS DUAL BUS SWITCH WITH INDIVIDUAL ENABLES
INDUSTRIAL TEMPERATURE RANGE
TYPICAL ON RESISTANCE vs V
IN
AT V
CC
= 5V
R
ON
(ohms)
V
IN
(Volts)
Symbol
Parameter
Test Conditions
Min.
Typ.
(1)
Max.
Unit
V
IH
Input HIGH Voltage
Guaranteed Logic HIGH for Control Pins
2
--
--
V
V
IL
Input LOW Voltage
Guaranteed Logic LOW for Control Pins
--
--
0.8
V
I
IN
Input Leakage Current (Control Inputs)
0V
V
IN
V
CC
--
--
1
A
I
OZ
Off-State Current (Hi-Z)
0V
V
OUT
V
CC
, Switches OFF
--
--
1
A
R
ON
Switch ON Resistance
(2)
V
CC
= Min., V
IN
= 0V, I
ON
= 30mA
--
5
7
V
CC
= Min., V
IN
= 2.4V, I
ON
= 15mA
--
10
15
V
P
Pass Voltage
(3)
V
IN
= V
CC
= 5V, I
OUT
= -5
A
3.7
4
4.2
V
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Industrial: T
A
= 40C to +85C, V
CC
= 5V 5%
NOTES:
1. Typical values are at V
CC
= 5V and T
A
= 25C.
2. R
ON
is guaranteed but not production tested.
3. Pass voltage is guaranteed but not production tested.
16
14
12
10
8
6
4
2
0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4
INDUSTRIAL TEMPERATURE RANGE
IDTQS3306A
HIGH-SPEED CMOS DUAL BUS SWITCH WITH INDIVIDUAL ENABLES
NOTES:
1. For conditions shown as Min. or Max., use the appropriate values specified under DC Electrical Characteristics.
2. Per TTL-driven input (V
IN
= 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.
POWER SUPPLY CHARACTERISTICS
Symbol
Parameter
Test Conditions
(1)
Max.
Unit
I
CCQ
Quiescent Power Supply Current
V
CC
= Max., V
IN
= GND or V
CC
, f = 0
3
A
I
CC
Power Supply Current per Input HIGH
(2)
V
CC
= Max., V
IN
= 3.4V, f = 0
1
mA
I
CCD
Dynamic Power Supply Current per MHz
(3)
V
CC
= Max., A and B Pins Open, Control Inputs Toggling @ 50% Duty Cycle
0.25
mA/MHz
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
T
A
= -40C to +85C, V
CC
= 5V 5%
C
LOAD
= 50pF, R
LOAD
= 500
unless otherwise noted.
Symbol
Parameter
Min
.
(1)
Typ.
Max.
Unit
t
PLH
Data Propagation Delay
(2)
0.25
(3)
ns
t
PHL
xA to xB
t
PZL
Switch Turn-On Delay
1.5
6.5
ns
t
PZH
OE to xA/xB
t
PLZ
Switch Turn-Off Delay
(2)
1.5
5.5
ns
t
PHZ
OE to xA/xB
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 at 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.
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IDTQS3306A
HIGH-SPEED CMOS DUAL BUS SWITCH WITH INDIVIDUAL ENABLES
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
CORPORATE HEADQUARTERS
for SALES:
for Tech Support:
2975 Stender Way
800-345-7015 or 408-727-6116
logichelp@idt.com
Santa Clara, CA 95054
fax: 408-492-8674
(408) 654-6459
www.idt.com
IDTQS
XXXXX
XX
Package
Device Type
Blank
Industrial (-40C to +85C)
8 pin Small Outline IC
S1
3306A
High Speed CMOS Dual Bus Switch with
Individual Active Low Enables
X
Process
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