1
INDUSTRIAL TEMPERATURE RANGE
IDTQS3VH16211
2.5V / 3.3V 24-BIT HIGH BANDWIDTH BUS SWITCH
MARCH 2002
2002 Integrated Device Technology, Inc.
DSC-5883/4
c
INDUSTRIAL TEMPERATURE RANGE
FUNCTIONAL BLOCK DIAGRAM
DESCRIPTION:
The QS3VH16211 HotSwitch is a 24-bit high bandwidth bus switch. The
QS3VH16211 has very low ON resistance, resulting in under 250ps
propagation delay through the switch. This device operates as a 24-bit bus
switch. When 1OE is low, 1An is connected to 1Bn. When 2OE is low, 2An
is connected to 2Bn. In the OFF and ON states, the switches are 5V-tolerant.
In the OFF state, the switches offer very high impedance at the terminals.
The combination of near-zero propagation delay, high OFF impedance,
and over-voltage tolerance makes the QS3VH16211 ideal for high perfor-
mance communications applications. It is also suitable for switching wide
digital buses.
The QS3VH16211 is characterized for operation from -40
C to +85C.
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
FEATURES:
N channel FET switches with no parasitic diode to Vcc
--
--
- Isolation under power-off conditions
--
--
- No DC path to Vcc or GND
--
--
- 5V tolerant in OFF and ON state
5V tolerant I/Os
Low R
ON
- 4
typical
Flat R
ON
characteristics over operating range
Rail-to-rail switching 0 - 5V
Bidirectional dataflow with near-zero delay: no added ground
bounce
Excellent R
ON
matching between channels
Vcc operation: 2.3V to 3.6V
High bandwidth - up to 500 MHz
LVTTL-compatible control Inputs
Undershoot Clamp Diodes on all switch and control Inputs
Low I/O capacitance, 4pF typical
Available in SSOP and TSSOP packages
APPLICATIONS:
Hot-swapping
10/100 Base-T, Ethernet LAN switch
Low distortion analog switch
Replaces mechanical relay
ATM 25/155 switching
IDTQS3VH16211
QUICKSWITCH
PRODUCTS
2.5V / 3.3V 24-BIT HIGH
BANDWIDTH BUS SWITCH
1
A
1
1
B
1
1
A
12
1
B
12
1
OE
2
B
1
2
B
12
2
A
1
2
A
12
2
OE
2
INDUSTRIAL TEMPERATURE RANGE
IDTQS3VH16211
2.5V / 3.3V 24-BIT HIGH BANDWIDTH BUS SWITCH
ABSOLUTE MAXIMUM RATINGS
(1)
Symbol
Description
Max.
Unit
V
TERM(2)
Supply Voltage to Ground
0.5 to 4.6
V
V
TERM(3)
DC Switch Voltage V
S
0.5 to 5.5
V
V
TERM(3)
DC Input Voltage V
IN
0.5 to 5.5
V
V
AC
AC Input Voltage (pulse width
20ns)
3
V
I
OUT
DC Output Current (max. current/pin)
120
mA
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. V
CC
terminals.
3. All terminals except V
CC
.
PIN CONFIGURATION
SSOP/ TSSOP
TOP VIEW
CAPACITANCE
(T
A
= +25
o
C, f = 1MHz, V
IN
= 0V, V
OUT
= 0V)
Symbol
Parameter
(1)
Typ.
Max.
Unit
C
IN
Control Inputs
3
5
pF
C
I/O
Quickswitch Channels (Switch OFF)
4
6
pF
C
I/O
Quickswitch Channels (Switch ON)
8
12
pF
NOTE:
1. This parameter is guaranteed but not production tested.
PIN DESCRIPTION
Pin Names
I/O
Description
xA
1
- xA
12
I/O
Bus A
xB
1
- xB
12
I/O
Bus B
1
OE -
2
OE
I
Data Select
FUNCTION TABLE
(1)
1
OE
2
OE
1
Ax
2
Ax
Function
L
L
1
Bx
2
Bx
1
Ax to
1
Bx,
2
Ax to
2
Bx
L
H
1
Bx
Z
1
Ax to
1
Bx
H
L
Z
2
Bx
2
Ax to
2
Bx
H
H
Z
Z
Disconnect
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
Z = High-Impedence
NC
G ND
V
C C
G ND
2
O E
G ND
G ND
47
37
38
39
40
41
42
43
44
45
46
33
34
35
36
56
55
49
50
51
52
53
54
48
1
2
3
4
5
6
7
8
9
10
12
13
14
15
16
17
18
19
20
11
21
22
23
24
29
30
31
32
25
26
27
28
1
B
6
1
B
12
2
B
1
2
B
2
2
B
3
1
A
1
1
A
2
1
A
3
1
A
4
1
A
5
1
A
6
1
A
7
1
A
8
1
A
9
1
A
1 0
1
A
1 1
1
A
1 2
2
A
1
2
A
2
2
A
3
2
A
4
2
A
5
2
A
6
2
A
7
2
A
8
2
A
9
2
A
1 0
2
A
1 1
2
A
1 2
2
B
4
2
B
5
2
B
6
2
B
7
2
B
8
2
B
9
2
B
1 0
2
B
1 1
2
B
1 2
1
B
7
1
B
8
1
B
9
1
B
1 0
1
B
1 1
1
B
1
1
B
2
1
B
3
1
B
4
1
B
5
1
O E
3
INDUSTRIAL TEMPERATURE RANGE
IDTQS3VH16211
2.5V / 3.3V 24-BIT HIGH BANDWIDTH BUS SWITCH
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
(1)
Following Conditions Apply Unless Otherwise Specified:
Industrial: T
A
= 40C to +85C, V
CC
= 3.3V 0.3V
Symbol
Parameter
Test Conditions
Min.
Typ.
(1)
Max.
Unit
V
IH
Input HIGH Voltage
Guaranteed Logic HIGH
V
CC
= 2.3V to 2.7V
1.7
--
--
V
for Control Inputs
V
CC
= 2.7V to 3.6V
2
--
--
V
IL
Input LOW Voltage
Guaranteed Logic HIGH
V
CC
= 2.3V to 2.7V
--
--
0.7
V
for Control Inputs
V
CC
= 2.7V to 3.6V
--
--
0.8
I
IN
Input Leakage Current (Control Inputs)
0V
V
IN
V
CC
--
--
1
A
I
OZ
Off-State Current (Hi-Z)
0V
V
OUT
5V, Switches OFF
--
--
1
A
I
OFF
Data Input/Output Power Off Leakage
V
IN
or V
OUT
0V to 5V, V
CC
= 0V
--
--
1
A
V
CC
= 2.3V
V
IN
= 0V
I
ON
= 30mA
--
6
8
R
ON
Switch ON Resistance
(Typ. at V
CC
= 2.5V) V
IN
= 1.7V
I
ON
= 15mA
--
7
9
V
CC
= 3V
V
IN
= 0V
I
ON
= 30mA
--
4
6
V
IN
= 2.4V
I
ON
= 15mA
--
5
8
NOTE:
1. Typical values are at V
CC
= 3.3V and T
A
= 25C, unless otherwise noted.
TYPICAL ON RESISTANCE vs V
IN
AT V
CC
= 3.3V
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
4.0
5.0
4.5
R
ON
(ohms)
V
IN
(Volts)
4
INDUSTRIAL TEMPERATURE RANGE
IDTQS3VH16211
2.5V / 3.3V 24-BIT HIGH BANDWIDTH BUS SWITCH
0
2
4
6
8
10
12
14
16
18
20
0
2
4
6
8
10
12
14
16
18
20
POWER SUPPLY CHARACTERISTICS
Symbol
Parameter
Test Conditions
(1)
Min.
Typ.
Max.
Unit
I
CCQ
Quiescent Power Supply Current
V
CC
= Max., V
IN
= GND or V
CC
, f = 0
--
1.5
3
mA
I
CC
Power Supply Current
(2,3)
per Input HIGH
V
CC
= Max., V
IN
= 3V, f = 0 per Control Input
--
--
30
A
I
CCD
Dynamic Power Supply Current
(4)
V
CC
= 3.3V, A and B Pins Open, Control Inputs
See Typical I
CCD
vs Enable Frequency graph below
Toggling @ 50% Duty Cycle
NOTES:
1. For conditions shown as Min. or Max., use the appropriate values specified under DC Electrical Characteristics.
2. Per input driven at the specified level. A and B pins do not contribute to
Icc.
3. This parameter is guaranteed but not tested.
4. This parameter represents the current required to switch internal capacitance at the specified frequency. The A and B inputs do not contribute to the Dynamic Power Supply
Current. This parameter is guaranteed but not production tested.
TYPICAL I
CCD
vs ENABLE FREQUENCY CURVE AT V
CC
= 3.3V
I
CCD
(mA)
ENABLE FREQUENCY (MHz)
5
INDUSTRIAL TEMPERATURE RANGE
IDTQS3VH16211
2.5V / 3.3V 24-BIT HIGH BANDWIDTH BUS SWITCH
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
T
A
= -40C to +85C
V
CC
= 2.5 0.2V
(1)
V
CC
= 3.3 0.3V
(1)
Symbol
Parameter
Min
.
(4)
Max.
Min
.
(4)
Max.
Unit
t
PLH
Data Propagation Delay
(2,3)
0.2
0.2
ns
t
PHL
xAx to xBx or xBx to xAx
t
PZH
Switch Turn-On Delay
1.5
9
1.5
9
ns
t
PZL
xOE to xAx or xBx
t
PHZ
Switch Turn-Off Delay
1.5
8.5
1.5
8.5
ns
t
PLZ
xOE to xAx or xBx
f
xOE
Operating Frequency - Enable
(2,5)
7.5
20
MHz
NOTES:
1. See Test Conditions under TEST CIRCUITS AND WAVEFORMS.
2. This parameter is guaranteed but not production tested.
3. The bus switch contributes no propagation delay other than the RC delay of the ON resistance of the switch and the load capacitance. The time constant for the switch alone
is of the order of 0.2ns at C
L
= 50pF. 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. Minimums are guaranteed but not production tested.
5. Maximum toggle frequency for xOE control input (pass voltage > V
CC
, V
IN
= 5V, R
LOAD
> 1M
, no C
LOAD
).
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