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IDTQS3306A
HIGH-SPEED CMOS DUAL BUS SWITCH WITH LOW ENABLES
INDUSTRIAL TEMPERATURE RANGE
NOVEMBER 1999
1999 Integrated Device Technology, Inc.
DSC-5577/-
c
IDTQS3306A
INDUSTRIAL TEMPERATURE RANGE
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
FUNCTIONAL BLOCK DIAGRAM
FEATURES:
-
Enhanced N channel FET with no inherent diode to Vcc
-
Very low ON Resistance (3
typical)
-
Fast turn-on/turn-off time
-
Available in 8-pin SOIC Package (S1)
-
Undershoot clamp diodes on all switch and control inputs
-
Zero propagation delay, zero added ground bounce
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
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INDUSTRIAL TEMPERATURE RANGE
IDTQS3306A
HIGH-SPEED CMOS DUAL BUS SWITCH WITH LOW ENABLES
PIN CONFIGURATION
Vcc
2
O E
8
7
5
6
1
2
3
4
1
A
1
B
2
A
2
B
1
O E
G N D
SOIC (S1)
TOP VIEW
ABSOLUTE MAXIMUM RATINGS
(1)
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
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
Typ.
Max.
(1)
Unit
OE (Inputs)
3
5
pF
Quickswitch Channels (Switch OFF)
5
7
pF
NOTE:
1. This parameter is guaranteed but not production tested.
PIN DESCRIPTION
Pin Names
I/O
Description
1
A -
2
A
I/O
Bus A
1
B -
2
B
I/O
Bus B
1
OE -
2
OE
I
Switch Enable
FUNCTION TABLE
(1)
nOE
nA
nB
Function
L
H
H
Connect
L
L
L
Connect
H
X
X
Disconnect
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don't care
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IDTQS3306A
HIGH-SPEED CMOS DUAL BUS SWITCH WITH LOW ENABLES
INDUSTRIAL TEMPERATURE RANGE
R
ON
(ohms)
V
IN
(Volts)
TYPICAL ON RESISTANCE vs V
IN
AT V
CC
= 5V
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
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Industrial: T
A
= -40C to +85C, V
CC
= 5.0V 5%
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
Vcc
--
--
1
A
I
OZ
Off-State Current (Hi-Z)
0V
V
OUT
Vcc, Switches OFF
--
--
1
A
R
ON
Switch ON Resistance
(2)
Vcc = Min., V
IN
= 0V
,
I
ON
= 30mA
--
5
7
R
ON
Switch ON Resistance
(2)
Vcc = 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
NOTES:
1. Typical values are at V
CC
= 5.0V, T
A
= 25C.
2. Max value of R
ON
is guaranteed but not production tested.
3. Pass voltage is guaranteed but not production tested.
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INDUSTRIAL TEMPERATURE RANGE
IDTQS3306A
HIGH-SPEED CMOS DUAL BUS SWITCH WITH LOW ENABLES
POWER SUPPLY CHARACTERISTICS
Symbol
Parameter
Test Conditions
(1)
Max.
Unit
I
CCQ
Quiescent Power Supply Current
V
CC
= Max., V
IN
= GND or Vcc, f = 0
3
A
I
CC
Power Supply Current per Control 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 Input 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 (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.
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
T
A
= -40C to +85C, V
CC
= 5.0V 5%
C
LOAD
= 50pF, R
LOAD
= 500
unless otherwise noted.
Symbol
Parameter
Min.
(1)
Typ.
Max.
Unit
t
PLH
t
PHL
Data Propagation Delay
(2,3)
nA to nB
--
--
0.25
(3)
ns
t
PZL
t
PZH
Switch Turn-on Delay
OE to nA/nB
1.5
--
6.5
ns
t
PLZ
t
PHZ
Switch Turn-off Delay
(2)
OE to nA/nB
1.5
--
5.5
ns
NOTES:
1. Minimums are guaranteed but not production tested.
2. This parameter is guaranteed but not production tested.
3. The time constant for the switch alone is of the order of 0.25ns for C
L
= 50pF. The bus switch contributes no propagation delay other than the RC
delay of the ON resistance of the switch and the load capacitance. 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 LOW ENABLES
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
IDTQ S
X XX XX
X X
P ackage
Device Type
B lank
Industrial (-40C to +85C )
8 pin S m all Outline IC
S 1
3306A
High S peed CM OS Dual Bus S witch with
Individual A ctive Low E nables
X
P rocess
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for SALES:
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www.idt.com*
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