1
INDUSTRIAL TEMPERATURE RANGE
IDTQS3VH16233
2.5V / 3.3V 32:16 MUX/DEMUX HIGH BANDWIDTH BUS SWITCH
AUGUST 2003
2003 Integrated Device Technology, Inc.
DSC-5882/6
c
INDUSTRIAL TEMPERATURE RANGE
FUNCTIONAL BLOCK DIAGRAM
DESCRIPTION:
The QS3VH16233 HotSwitch is a 32-bit to 16-bit high bandwidth bus
switch, which can multiplex or demultiplex data. The QS3VH16233 has
very low ON resistance, resulting in under 250ps propagation delay
through the switch. This device can be used as two 16-bit to 8-bit
multiplexers or as one 32-bit to 16-bit multiplexer. SELx inputs control the
data flow. TESTx inputs control either one or two ports connection. 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 also makes the QS3VH16233 ideal for high
performance communications applications.
The QS3VH16233 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
IDTQS3VH16233
QUICKSWITCH
PRODUCTS
2.5V / 3.3V 32:16 MUX/DEMUX
HIGH BANDWIDTH BUS SWITCH
TEST
1
SEL
1
xA
O N E O F EIG H T C H A N NE LS
xB
2
xB
1
x = 1 through 8
TEST
2
SEL
2
xA
O N E OF E IGH T C H AN N E LS
xB
2
xB
1
x = 9 through 16
2
INDUSTRIAL TEMPERATURE RANGE
IDTQS3VH16233
2.5V / 3.3V 32:16 MUX/DEMUX 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
PIN DESCRIPTION
Pin Names
I/O
Description
x A
I/O
Bus A
xBx
I/O
Bus B
SELx
I
Data Select
TESTx
I
Port Select
GND
56
1
1
A
1
B
1
55
2
2
B
1
1
B
2
54
3
2
B
2
2
A
47
37
38
39
40
41
42
43
44
45
46
33
34
35
36
49
50
51
52
53
48
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
3
A
TEST
1
Vcc
TEST
2
SEL
1
SEL
2
GND
Vcc
4
B
1
4
B
2
5
A
6
B
1
6
B
2
7
A
8
B
1
9
A
10
B
1
10
B
2
11
A
12
B
1
12
B
2
13
A
14
B
1
14
B
2
15
A
16
B
1
8
B
2
16
B
2
10
A
11
B
1
11
B
2
12
A
13
B
1
13
B
2
14
A
15
B
1
15
B
2
16
A
9
B
1
9
B
2
3
B
1
3
B
2
4
A
5
B
1
5
B
2
6
A
7
B
1
7
B
2
8
A
NOTE:
1. This parameter is guaranteed but not production tested.
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
Mux
8
12
pF
(Switch OFF)
Demux
4
6
C
I/O
Quickswitch Channels
Mux
16
24
pF
(Switch ON)
Demux
8
12
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don't Care
FUNCTION TABLE
(1)
SELx
TESTx
xA
Function
L
L
xB
1
xA to xB
1
H
L
xB
2
xA to xB
2
X
H
xB
1,
xB
2
xA to xB
1
and xB
2
3
INDUSTRIAL TEMPERATURE RANGE
IDTQS3VH16233
2.5V / 3.3V 32:16 MUX/DEMUX 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
R
ON
(ohms)
V
IN
(Volts)
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
4
INDUSTRIAL TEMPERATURE RANGE
IDTQS3VH16233
2.5V / 3.3V 32:16 MUX/DEMUX HIGH BANDWIDTH BUS SWITCH
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)
0
2
4
6
8
10
12
14
16
18
20
0
2
4
6
8
10
12
14
16
18
20
5
INDUSTRIAL TEMPERATURE RANGE
IDTQS3VH16233
2.5V / 3.3V 32:16 MUX/DEMUX 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
A to B or B to A
t
BX
Switch Multiplex Delay
1.5
9
1.5
7.5
ns
SEL to xA
t
PZH
Switch Turn-On Delay
1.5
9
1.5
8
ns
t
PZL
SEL to xBx
t
PHZ
Switch Turn-Off Delay
1.5
7.5
1.5
7.5
ns
t
PLZ
SEL to xBx
t
PZH
Switch Turn-On Delay
1.5
8.5
1.5
9
ns
t
PZL
TEST to xBx
t
PHZ
Switch Turn-Off Delay
1.5
8.5
1.5
8.5
ns
t
PLZ
TEST to xBx
f
Sx
Operating Frequency - Enable
(2,5)
7.5
15
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 Sx control input (pass voltage > V
CC
, V
IN
= 5V, R
LOAD
> 1M
, no C
LOAD
).
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