1
IDTQS32861
HIGH-SPEED CMOS 10-BIT BUS SWITCH WITH FLOW-THROUGH PINOUT
INDUSTRIAL TEMPERATURE RANGE
MARCH 2002
2002 Integrated Device Technology, Inc.
DSC-5757/2
c
INDUSTRIAL TEMPERATURE RANGE
A
0
A
9
B
0
B
9
BE
.UNCTIONAL BLOCK DIAGRAM
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
.EATURES:
Enhanced N channel FET with no inherent diode to Vcc
Near zero ground bounce
Undershoot clamp diodes on all switch and control inputs
Available in QSOP and SOIC packages
APPLICATIONS:
Hot-swapping, hot-docking
Voltage translation (5V to 3.3V)
Power conservation
Capacitance reduction and isolation
Clock gating
Bus isolation
IDTQS32861
QUICKSWITCH
PRODUCTS
HIGH-SPEED CMOS
10-BIT BUS SWITCH WITH
FLOW-THROUGH PINOUT
DESCRIPTION:
The QS32861 provides a set of ten high speed CMOS, TTL-compatible
bus switches. The Bus Enable (
BE) signal turns the switches on. The
QS32861 includes internal 25
series termination resistors to reduce
reflection noise in high speed applications. When closed, the switch acts as
the source (series) termination for the driver connected to it.
The QS32861 is characterized for operation at -40C to +85C.
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INDUSTRIAL TEMPERATURE RANGE
IDTQS32861
HIGH-SPEED CMOS 10-BIT BUS SWITCH WITH FLOW-THROUGH PINOUT
PIN CON.IGURATION
QSOP/ SOIC
TOP VIEW
24
23
22
21
20
19
18
17
16
15
14
13
NC
GND
V
CC
BE
1
2
3
4
5
6
7
8
9
10
11
12
A
0
A
1
A
2
A
3
A
4
A
5
A
6
A
7
A
8
A
9
B
0
B
1
B
2
B
3
B
4
B
5
B
6
B
7
B
8
B
9
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
Z = High-Impedance
.UNCTION TABLE
(1)
Symbol
Description
Max
Unit
V
TERM
(2)
Supply Voltage to Ground
0.5 to +7
V
V
TERM
(3)
DC Switch Voltage Vs
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
= 85C)
0.5
W
T
STG
Storage Temperature
65 to +150
C
ABSOLUTE MAXIMUM RATINGS
(1)
NOTE:
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
= +25C, f = 1.0MH
Z
, V
IN
= 0V, V
OUT
= 0V)
NOTE:
1. This parameter is measured at characterization but not tested.
Pins
Typ.
Max.
(1)
Unit
Control Pins
3
5
pF
Quickswitch Channels (Switch OFF)
5
7
pF
PIN DESCRIPTION
Pin Names
Description
BE
Bus Enable
A
0
- A
9
Bus A
B
0
- B
9
Bus B
BE
A
0
- A
9
2A, 2Y I/Os
H
Hi-Z
Disconnect
L
B
0
- B
9
Connect
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IDTQS32861
HIGH-SPEED CMOS 10-BIT BUS SWITCH WITH FLOW-THROUGH PINOUT
INDUSTRIAL TEMPERATURE RANGE
R
ON
(ohms)
V
IN
(Volts)
TYPICAL ON RESISTANCE vs V
IN
AT V
CC
= 5V
80
70
60
50
40
30
20
10
0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
Symbol
Parameter
Test Conditions
Min.
Typ.
(1)
Max.
Unit
V
IH
Input HIGH Level
Guaranteed Logic HIGH for Control Pins
2
--
--
V
V
IL
Input LOW Level
Guaranteed Logic LOW for Control Pins
--
--
0.8
V
I
IN
Input LeakageCurrent (Control Inputs)
(2)
0V
V
IN
V
CC
--
0.01
1
A
I
OZ
Off-State Output Current (Hi-Z)
0V
V
OUT
V
CC
, Switches OFF
--
0.01
1
A
R
ON
(3)
Switch ON Resistance
V
CC
= Min., V
IN
= 0V, I
ON
= 30mA
15
20
35
V
CC
= Min., V
IN
= 2.4V, I
ON
=15mA
18
25
40
V
P
Pass Voltage
(2)
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
= 5.0V 5%
NOTES:
1. Typical values are at V
CC
= 5.0V, T
A
= 25C.
2. Pass Voltage is guaranteed but not production tested.
3. R
OUT
changed on March 8, 2002. See rear page for more information.
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INDUSTRIAL TEMPERATURE RANGE
IDTQS32861
HIGH-SPEED CMOS 10-BIT BUS SWITCH WITH FLOW-THROUGH PINOUT
POWER SUPPLY CHARACTERISTICS
Symbol
Parameter
Test Conditions
(1)
Typ
(2)
Max.
Unit
I
CCQ
Quiescent Power Supply Current
V
CC
= Max., V
IN
= GND or Vcc, f = 0
0.2
3
A
I
CC
Power Supply Current per Control Input HIGH
V
CC
= Max., V
IN
= 3.4V
(3)
, f = 0
--
2.5
mA
I
CCD
Dynamic Power Supply Current per MHz
(4)
V
CC
= Max., A and B pins open
--
0.25
mA/MHz
BE Input Toggling at 50% Duty Cycle
NOTES:
1. For conditions shown as Min. or Max., use the appropriate values specified under DC Electrical Characteristics.
2. Typical values are at V
CC
= 5.0V, 25C ambient.
3. Per TLL driven input (V
IN
= 3.4V, control inputs only). A and B pins do not contribute to
Icc.
4. 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 pins 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
Data Propagation Delay
(2,4)
--
--
1.25
(3)
ns
t
PHL
A to B or B to A
t
PZH
Switch Turn-on Delay
1.5
--
7.5
ns
t
PZL
BE to A or B
t
PHZ
Switch Turn-off Delay
(2)
1.5
--
5.5
ns
t
PLZ
BE to A or B
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.
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.
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IDTQS32861
HIGH-SPEED CMOS 10-BIT BUS SWITCH WITH FLOW-THROUGH PINOUT
INDUSTRIAL TEMPERATURE RANGE
ORDERING IN.ORMATION
IDTQS
XXXXX
XX
Package
Device Type
Blank
Industrial (-40C to +85C)
Small Outline IC
Quarter-Size Outline Package
SO
Q
32861
High Speed CMOS 10-Bit Bus Switch with
Flow-Through Pinout
X
Process
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
Parameter
Description
Min.
Typ.
Max.
Unit
R
ON
V
CC
= Min, V
IN
= 0V, I
ON
= 30mA
20
28
40
V
CC
= Min, V
IN
= 2.4V, I
ON
= 15mA
20
35
48
As per PCN L0201-02, the Output Resistance (R
ON
) specifications have changed as of March 8, 2002. The original specifications were:
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