HIGH-SPEED CMOS 12-BIT 2:1 MUX/DEMUX SWITCH WITH TERMINATION
INDUSTRIAL TEMPERATURE RANGE
QUICKSWITCH
®
PRODUCTS
HIGH-SPEED CMOS 12-BIT 2:1 MUX/
DEMUX SWITCH WITH RESISTOR
TERMINATION ON THE DEMUX SIDE
FEATURES:
−
−
−
−
−
−
Enhanced N channel FET with no inherent diode to Vcc
5Ω bidirectional switches connect inputs to outputs
Zero propagation delay, zero ground bounce
TTL-compatible input and output levels
Undershoot clamp diodes on all switch and control pins
Available in 56-pin SSOP and TSSOP Packages
IDTQS316292
DESCRIPTION:
The QS316292 is a high-speed CMOS12-bit 2:1 multiplexer/demultiplexer
switch with a 500Ω resistor termination to GND on the demultiplexer side
to eliminate floating nodes. The low ON resistance of the QS316292 allows
inputs to be connected to outputs without adding propagation delay and
without generating additional ground bounce noise.
The QS316292 is characterized for operation at -40°C to +85°C.
APPLICATIONS
−
−
−
Resource sharing
Hot-docking
Voltage translation (5V to 3.3V)
FUNCTIONAL BLOCK DIAGRAM
1 of 12 Chann els
1A1
1B1
1B2
500
Ω
Flow Control
S
INDUSTRIAL TEMPERATURE RANGE
1
c
1999 Integrated Device Technology, Inc.
NOVEMBER 1999
DSC-5565/-
IDTQS316292
HIGH-SPEED CMOS 12-BIT 2:1 MUX/DEMUX SWITCH WITH TERMINATION
INDUSTRIAL TEMPERATURE RANGE
(1)
Unit
V
V
V
V
mA
W
°C
PIN CONFIGURATION
S
1A1
NC
2A1
NC
3A1
NC
G ND
4A1
NC
5A1
NC
6A1
NC
7A1
NC
V
CC
8A1
G ND
NC
9A1
NC
10A1
NC
11A1
NC
12A1
NC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
SO56-1
SO56-2
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
NC
NC
1B1
1B2
2B1
2B2
3B1
G ND
3B2
4B1
4B2
5B1
5B2
6B1
6B2
7B1
7B2
8B1
G ND
8B2
9B1
9B2
10B1
10B2
11B1
11B2
12B1
12B2
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 (T
A
= 85°C)
Storage Temperature
SSOP
TSSOP
Max.
– 0.5 to +7
– 0.5 to +7
– 0.5 to +7
-3
120
.93
.77
– 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.
4
7.5
Max.
(1)
5
9
Unit
pF
pF
NOTE:
1. This parameter is guaranteed but not production tested.
PIN DESCRIPTION
Pin Names
1
A
1
-
12
A
1
1
Bn -
12
Bn
I/O
I/O
I/O
I
Description
Bus A
Bus B
Data Select
S
FUNCTION TABLE
(1)
S
L
H
xA
1
xB
1
xB
2
Function
xA
1
to xB
1,
xB
2
to GND through 500Ω
xA
1
to xB
2,
xB
1
to GND through 500Ω
SSOP/ TSSOP
TOP VIEW
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
2
IDTQS316292
HIGH-SPEED CMOS 12-BIT 2:1 MUX/DEMUX SWITCH WITH TERMINATION
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
I
OS
V
IK
V
H
R
ON
R
ON
V
P
Parameter
Input HIGH Voltage
Input LOW Voltage
Input Leakage Current (Control Inputs)
Off-State Current (Hi-Z)
Short Circuit Current
Clamp Diode Voltage
Input Hysterisis at Control Pins
Switch ON Resistance
(2)
Switch ON Resistance
(2)
Pass Voltage
(3)
Test Conditions
Guaranteed Logic HIGH for Control Pins
Guaranteed Logic LOW for Control Pins
0V
≤
V
IN
≤
Vcc
0V
≤
V
OUT
≤
Vcc, Switches OFF
A(B) = 0V B(A) = Vcc
Vcc = Min., I
IN
= -18mA
—
Vcc = Min., V
IN
= 0V, I
ON
= 30mA
Vcc = Min., V
IN
= 2.4V, I
ON
= 15mA
V
IN
= Vcc = 5V, I
OUT
= -5µA
Min.
2
—
—
—
-100
—
—
—
—
3.7
Typ.
(1)
—
—
—
—
—
-0.7
150
5
10
4
Max.
—
0.8
±1
±1
—
-1.2
—
7
14
4.2
Unit
V
V
µA
µA
mA
V
mV
Ω
Ω
V
NOTES:
1. Typical values are at V
CC
= 5.0V, T
A
= 25°C.
2. Max value of R
ON
is guaranteed but not production tested.
3. Pass voltage is guaranteed but not production tested.
TYPICAL ON RESISTANCE vs V
IN
AT V
CC
= 5V
R
ON
(ohms)
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
V
IN
(Volts)
3
IDTQS316292
HIGH-SPEED CMOS 12-BIT 2:1 MUX/DEMUX SWITCH WITH TERMINATION
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
(2)
Dynamic Power Supply Current per MHz
(3)
Test Conditions
(1)
V
CC
= Max., V
IN
= GND or Vcc, f = 0
V
CC
= Max., V
IN
= 3.4V, f = 0
V
CC
= Max., A and B pins open
Control Input Toggling at 50% Duty Cycle
Tyo.
0.1
—
—
Max.
3
1.5
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. Per TLL driven input (V
IN
= 3.4V). A and B 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
= -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)
xA
1
to xBn, xBn to xA
1
Switch Turn-on Delay
(4)
S to xA
1
or xBn
Switch Turn-off Delay
(2)
S to xA
1
, xBn
Min.
(1)
—
1.5
1.5
Typ.
—
—
—
Max.
0.25
(3)
6.5
6.2
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 0.25ns 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. Switch turn-on delay from S to xBn is guaranteed but not production tested.
4
IDTQS316292
HIGH-SPEED CMOS 12-BIT 2:1 MUX/DEMUX SWITCH WITH TERMINATION
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
IDTQS
XXXXX
Device Type
XX
Package
X
Process
Blank
Industrial (-40°C to +85°C )
PV
PA
Shrink Small Outline Package (SO56-1)
Thin Shrink Small Outline Package (SO56-2)
316292
High S peed CMOS 12-Bit 2:1 Mux/Demux Switch
with Resistor Termination on the Demux Side
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