Enhanced N channel FET with no inherent diode to Vcc
5Ω bidirectional switches connect inputs to outputs
Zero propagation delay, zero ground bounce
Undershoot clamp diodes on all switch and control pins
Two enables control five bits each
Available in SOIC, QSOP, and TSSOP Packages
IDTQS3384
DESCRIPTION:
The QS3384 provides a set of ten high-speed CMOS, TTL-compatible
bus switches. The low ON resistance of QS3384 allows inputs to be
connected to outputs without adding propagation delay and without gener-
ating additional ground bounce. Two banks of 5 switches are controlled by
independent Bus Enable (BE) signals.
The QS3384 is characterized for operation at -40°C to +85°C.
APPLICATIONS
−
−
−
−
−
−
Hot-swapping, hot-docking
Voltage translation (5V to 3.3V)
Power conservation
Capacitance reduction and isolation
Bus isolation
Clock gating
FUNCTIONAL BLOCK DIAGRAM
A
0
B
0
A
4
B
4
A
5
B
5
A
9
B
9
BEA
BEB
INDUSTRIAL TEMPERATURE RANGE
1
c
1999
Integrated Device Technology, Inc.
FEBRUARY 2000
DSC-5758/-
IDTQS3384
HIGH-SPEED CMOS 10-BIT BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
BEA
B
0
A
0
A
1
B
1
B
2
A
2
A
3
B
3
B
4
A
4
G ND
1
2
3
4
5
6
7
8
9
10
11
12
SO24-2
SO24-8
SO24-9
24
23
22
21
20
19
18
17
16
15
14
13
V
CC
B
9
A
9
A
8
B
8
B
7
A
7
A
6
B
6
B
5
A
5
BEB
ABSOLUTE MAXIMUM RATINGS
Symbol
V
TERM(2)
V
TERM(3)
V
TERM(3)
V
AC
I
OUT
P
MAX
T
STG
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
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 Inputs
Quickswitch Channels (Switch OFF)
Typ.
3
5
Max.
(1)
5
7
Unit
pF
pF
SOIC/ QSOP/ TSSOP
TOP VIEW
NOTE:
1. This parameter is guaranteed but not production tested.
PIN DESCRIPTION
Pin Names
A
0
- A
9
B
0
- B
9
BEA, BEB
I/O
I/O
I/O
I
Description
Bus A
Bus B
Bus Switch Enable
FUNCTION TABLE
(1)
BEA
H
L
H
L
BEB
H
H
L
L
B
0
- B
4
Hi-Z
A
0
- A
4
Hi-Z
A
0
- A
4
B
5
- B
9
Hi-Z
Hi-Z
A
5
- A
9
A
5
- A
9
Connect
Connect
Connect
Function
Disconnect
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
Z = High-Impedence
2
IDTQS3384
HIGH-SPEED CMOS 10-BIT BUS SWITCH
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)
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, Switches OFF
Vcc = Min., V
IN
= 0V, I
ON
= 30mA
Vcc = Min., V
IN
= 2.4V, I
ON
= 15mA
V
IN
= V
CC
= 5V, I
OUT
= -5µA
Min.
2
—
—
—
—
—
3.7
Typ.
(1)
—
—
±0.01
±0.01
5
10
4
Max.
—
0.8
±1
±1
7
15
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
16
R
ON
(ohms)
14
12
10
8
6
4
2
0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
V
IN
(Volts)
3
IDTQS3384
HIGH-SPEED CMOS 10-BIT BUS SWITCH
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., A and B pins open
Control Input Toggling at 50% Duty Cycle
Max.
1.5
2.5
0.25
Unit
mA
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). 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
Following Conditions Apply Unless Otherwise Specified:
Industrial: T
A
= -40°C to +85°C, V
CC
= 5.0V ± 5%
C
LOAD
= 50pF, R
LOAD
= 500Ω
Symbol
t
PLH
t
PHL
t
PZL
t
PZH
t
PLZ
t
PHZ
Parameter
Data Propagation Delay
(2,4)
Ax to Bx, Bx to Ax
Switch Turn-on Delay
BEA, BEB
to Ax, Bx
Switch Turn-off Delay
(2)
BEA, BEB
to Ax, Bx
Min.
(1)
—
1.5
1.5
Typ.
—
—
—
Max.
0.25
(3)
6.5
5.5
Unit
ns
ns
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.
4. 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.
4
IDTQS3384
HIGH-SPEED CMOS 10-BIT BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
IDTQS
XXXXX
Device Type
XX
Package
SO
Q
PA
Small Outline IC (SO24-2)
Quarter Size Outline Package (SO24-8)
Thin Small Size Outline Package (SO24-9)
3384
High Speed CMOS 10-Bit Bus Switch
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