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IDTQS32383
HIGH-SPEED CMOS 10-BIT BUS EXCHANGE SWITCH
INDUSTRIAL TEMPERATURE RANGE
OCTOBER 2000
1999 Integrated Device Technology, Inc.
DSC-5830/-
c
IDTQS32383
INDUSTRIAL TEMPERATURE RANGE
QUICKSWITCH
PRODUCTS
HIGH-SPEED CMOS 10-BIT
BUS EXCHANGE SWITCH
DESCRIPTION:
The QS32383 provides ten high-speed CMOS TTL-compatible bus
switches. The low ON resistance of the QS32383 allows inputs to be
connected to outputs without adding propagation delay and without gener-
ating additional ground bounce noise. The Bus Enable (BE) signal turns
the switches on. The Bus Exchange (BX) signal provides nibble swap of
the AB and CD pairs of signals. This exchange configuration allows byte
swapping of buses in systems. It can also be used as a 5-wide 2-to-1
multiplexer and to create low delay barrel shifters, etc.
The QS32383 adds an internal 25
resistor to reduce reflection noise
in high-speed applications. When the switch is closed, it acts as the source
termination for the driver connected to it.
The QS32383 is characterized for operation at -40C to +85C.
A4
C4
D4
B4
BX
BE
A0
C0
D0
B0
FUNCTIONAL BLOCK DIAGRAM
FEATURES:
-
Enhanced N channel FET with no inherent diode to Vcc
-
5
bidirectional switches connect inputs to outputs
-
Zero ground bounce
-
Undershoot clamp diodes on all switch and control pins
-
Bus exchange allows nibble swap
-
Available in SOIC and QSOP Packages
-
25
version for low noise
APPLICATIONS
-
Hot-swapping, hot-docking
-
Voltage translation (5V to 3.3V)
-
Resource sharing
-
Crossbar switching
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INDUSTRIAL TEMPERATURE RANGE
IDTQS32383
HIGH-SPEED CMOS 10-BIT BUS EXCHANGE SWITCH
PIN CONFIGURATION
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
BE
C0
A0
B0
D0
C1
A1
B1
D1
C2
A2
GND
V
CC
D4
B4
A4
C4
D3
B3
A3
C3
D2
B2
BX
SO24-2
SO24-8
SOIC/ QSOP
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 (T
A
= 85
C)
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
Control 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
A
0
-A
4
, B
0
-B
4
I/O
Buses A, B
C
0
-C
4
, D
0
-D
4
I/O
Buses C, D
BE
I
Bus Switch Enable
BX
I
Bus Exchange
FUNCTION TABLE
(1)
BE
BX
A
0
- A
4
B
0
- B
4
Function
H
X
Hi-Z
Hi-Z
Disconnect
L
L
C
0
- C
4
D
0
- D
4
Connect
L
H
D
0
- D
4
C
0
- C
4
Exchange
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don't care
Z = High-Impedence
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IDTQS32383
HIGH-SPEED CMOS 10-BIT BUS EXCHANGE SWITCH
INDUSTRIAL TEMPERATURE RANGE
R
ON
(ohms)
V
IN
(Volts)
TYPICAL ON RESISTANCE vs V
IN
AT V
CC
= 5V
40
35
30
25
20
15
10
5
0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
45
50
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
--
0.01
1
A
I
OZ
Off-State Current (Hi-Z)
0V
V
OUT
Vcc, Switches OFF
--
0.01
1
A
R
ON
Switch ON Resistance
Vcc = Min., V
IN
= 0V
,
I
ON
= 30mA
20
28
40
R
ON
Switch ON Resistance
Vcc = Min., V
IN
= 2.4V
,
I
ON
= 15mA
20
35
48
V
P
Pass Voltage
(2)
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. Pass voltage is guaranteed but not production tested.
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INDUSTRIAL TEMPERATURE RANGE
IDTQS32383
HIGH-SPEED CMOS 10-BIT BUS EXCHANGE SWITCH
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
mA
I
CC
Power Supply Current per Control Input HIGH
(2)
V
CC
= Max., V
IN
= 3.4V, f = 0
2.5
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, B, C, and D 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)
AxBx to CxDx, CxDx to AxBx
--
--
1.25
(3)
ns
t
PZL
t
PZH
Switch Turn-on Delay
BE
to Ax, Bx, Cx, Dx
1.5
--
7.5
ns
t
PLZ
t
PHZ
Switch Turn-off Delay
(2)
BE
to Ax, Bx, Cx, Dx
1.5
--
6.5
ns
t
BX
Switch Multiplex Delay
BX to Ax, Bx, Cx, Dx
1.5
--
7.5
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 1.25ns 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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IDTQS32383
HIGH-SPEED CMOS 10-BIT BUS EXCHANGE SWITCH
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
IDTQS
XXXXX
XX
Package
Device Type
Blank
Industrial (-40C to +85C )
Small Outline IC (SO24-2)
Quarter Size Outline Package (SO24-8)
SO
Q
32383
High Speed CMOS 10-Bit Bus Exchange Switch
X
Process
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