HIGH-SPEED CMOS 10-BIT BUS SWITCH WITH ACTIVE ENABLES
INDUSTRIAL TEMPERATURE RANGE
QUICKSWITCH
®
PRODUCTS
HIGH-SPEED CMOS 10-BIT
BUS SWITCH WITH ACTIVE
HIGH AND LOW ENABLES
FEATURES:
−
−
−
−
−
Enhanced N channel FET with no inherent diode to Vcc
Undershoot clamp diodes on all switch and control inputs
Active low and high enable control
25Ω resistors for low noise
Available in SOIC and QSOP packages
IDTQS32862
DESCRIPTION:
The QS32862 provides a set of ten high speed CMOS, TTL Compatible
bus switches. The switches are controlled by independent active Low
enable (BE) and High enable (BE) controls.
The QS32862 includes internal 25Ω 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
QS32862 is ideal for switching digital buses as well as hot-plugging, hot-
docking, and voltage translation.
The QS32862 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
Applications requiring Active-High enabling
Clock gating
Bus isolation
FUNCTIONAL BLOCK DIAGRAM
A
0
B
0
A
9
B
9
BE
BE
INDUSTRIAL TEMPERATURE RANGE
1
c
1999
Integrated Device Technology, Inc.
FEBRUARY 2000
DSC-5723/-
IDTQS32862
HIGH-SPEED CMOS 10-BIT BUS SWITCH WITH ACTIVE ENABLES
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
BE
A
0
A
1
A
2
A
3
A
4
A
5
A
6
A
7
A
8
A
9
GND
1
2
3
4
5
6
7
8
9
10
11
12
SO24-2
SO24-8
24
23
22
21
20
19
18
17
16
15
14
13
V
CC
BE
B
0
B
1
B
2
B
3
B
4
B
5
B
6
B
7
B
8
B
9
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
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
TOP VIEW
NOTE:
1. This parameter is guaranteed but not production tested.
PIN DESCRIPTION
Pin Names
BE
BE
A
0
– A
9
B
0
– B
9
I/O
I
I
I/O
I/O
Description
Active High Bus Enable
Active High Bus Enable
Bus A
Bus B
FUNCTION TABLE
(1)
BE
L
L
H
H
BE
L
H
L
H
A
0
– A
9
Hi-Z
Hi-Z
B
0
– B
9
Hi-Z
Function
Disconnect
Disconnect
Connect
Disconnect
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
Z = High-impedence
2
IDTQS32862
HIGH-SPEED CMOS 10-BIT BUS SWITCH WITH ACTIVE ENABLES
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 ± 10%
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
—
—
—
20
20
3.7
Typ.
(1)
—
—
±0.01
±0.01
28
35
4
Max.
—
0.8
±1
±1
40
48
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
R
ON
(ohms)
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
V
IN
(Volts)
3
IDTQS32862
HIGH-SPEED CMOS 10-BIT BUS SWITCH WITH ACTIVE ENABLES
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
Dynamic Power Supply Current per MHz
(4)
Test Conditions
(1)
V
CC
= Max., V
IN
= GND or Vcc, f = 0
V
CC
= Max., V
IN
= 3.4V
(3)
, f = 0
V
CC
= Max., A and B pins open,
BE,
BE
inputs
Toggling at 50% Duty Cycle
Typ.
(2)
0.2
—
—
Max.
3
2.5
0.25
Unit
µA
mA
mA/MHz
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, T
A
= 25°C 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 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
= -40°C to +85°C, V
CC
= 5.0V ± 10%
C
LOAD
= 50pF, R
LOAD
= 500Ω unless otherwise noted.
Symbol
t
PLH
t
PHL
t
PZL
t
PZH
t
PLZ
t
PHZ
Parameter
Data Propagation Delay
(2,3)
A to B or B to A
Switch Turn-on Delay
BE
or BE to A to B
Switch Turn-off Delay
(2)
BE
or BE to A to B
Min.
(1)
—
1.5
1.5
Typ.
—
—
—
Max.
1.25
75
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 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.
4
IDTQS32862
HIGH-SPEED CMOS 10-BIT BUS SWITCH WITH ACTIVE ENABLES
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
IDTQ S
XXXXX
Device Type
XX
Package
X
Process
Blank
Industrial (-40°C to +85°C )
SO
Q
Sm all O utline IC (SO 24-2)
Quarter-Size O utline Package (SO24-8)
32862
High Speed CM OS 10-Bit Bus Switch with
Active H igh and Low Enables
CORPORATE HEADQUARTERS
2975 Stender Way
Santa Clara, CA 95054
for SALES:
800-345-7015 or 408-727-6116
fax: 408-492-8674
www.idt.com*
*To search for sales office near you, please click the sales button found on our home page or dial the 800# above and press 2.
The IDT logo, QuickSwitch, and SynchroSwitch are registered trademarks of Integrated Device Technology, Inc.
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