IDTQS32X2245
HIGH-SPEED CMOS QUICKSWITCH DOUBLE-WIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
QUICKSWITCH® PRODUCTS
HIGH-SPEED CMOS
QUICKSWITCH
DOUBLE-WIDTH BUS SWITCH
FEATURES:
•
•
•
•
•
•
•
IDTQS32X2245
DESCRIPTION:
Enhanced N channel FET with no inherent diode to Vcc
Dual '245 function
Ω resistor for low noise
25Ω
Low propagation delay, zero ground bounce
Undershoot clamp diodes on all switch and control inputs
TTL-compatible control inputs
Available in 40-pin QVSOP package
The QS32X2245 provides a set of 16 high-speed CMOS TTL-compatible
bus switches in a flow-through pinout. The QS32X2245 includes internal
25Ω resistors to reduce reflection noise in high speed applications. The
Output Enable (OEn) signals turn the switches on similar to the OEn signal
of the 74'245.
QuickSwitch devices provide an order of magnitude faster speed than
conventional logic devices.
The QS32X2245 is characterized for operation at -40°C to +85°C.
APPLICATIONS:
•
•
•
•
•
•
Hot-swapping, hot-docking
Voltage translation (5V to 3.3V)
Bus switching and isolation
Power conservation
Clock gating
Logic replacement
FUNCTIONAL BLOCK DIAGRAM
A0
A1
A2
A3
A4
A5
A6
A7
B0
B1
B2
B3
B4
B5
B6
B7
A8
A9
A10 A11
A12
A13 A14 A15
B8
B9
B10 B11
B12
B13 B14 B15
OE1
OE2
INDUSTRIAL TEMPERATURE RANGE
c
2011 Integrated Device Technology, Inc.
FEBRUARY 2011
1
DSC-5724/5
IDTQS32X2245
HIGH-SPEED CMOS QUICKSWITCH DOUBLE-WIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS(1)
Symbol
Description
Max
Unit
Supply Voltage to Ground
–0.5 to +7
V
NC
1
40
VCC
VTERM(2)
A0
2
39
OE1
VTERM(3)
DC Switch Voltage Vs
–0.5 to +7
V
VTERM(3)
DC Input Voltage VIN
–0.5 to +7
V
A1
3
38
B0
VAC
AC Input Voltage (pulse width ≤ 20ns)
–3
V
A2
4
37
B1
IOUT
DC Output Current
120
mA
PMAX
Maximum Power Dissipation (TA = 85°C)
0.92
W
A3
5
36
B2
TSTG
Storage Temperature
–65 to +150
°C
A4
6
35
B3
A5
7
34
B4
A6
8
33
B5
A7
9
32
B6
GND
10
31
B7
NC
11
30
Vcc
A8
12
29
OE2
A9
13
28
B8
A10
14
27
B9
15
26
B10
A12
16
25
B11
A13
17
24
B12
A14
18
23
B13
A15
19
22
B14
GND
20
21
B15
A11
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
(TA = +25°C, f = 1.0MHZ, VIN = 0V, VOUT = 0V)
Pins
Typ.
Max.(1)
Unit
Control Pins
3
5
pF
5
7
pF
Quickswitch Channels (Switch OFF)
NOTE:
1. This parameter is measured at characterization but not tested.
PIN DESCRIPTION
Pin Names
QVSOP
TOP VIEW
Description
I/O
OE1, OE2
I
An
I/O
Bus Enable
Bus A
Bn
I/O
Bus B
FUNCTION TABLE(1)
OE1
OE2
A8 - A15
Function
H
H
Z
Z
Disconnect
L
H
B0 - B7
Z
Connect
H
L
Z
B8 - B15
Connect
L
L
B0 - B7
B8 - B15
Connect
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
Z = High-Impedance
2
A0 - A7
IDTQS32X2245
HIGH-SPEED CMOS QUICKSWITCH DOUBLE-WIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Industrial: TA = –40°C to +85°C, VCC = 5.0V ±5%
Symbol
Parameter
Test Conditions
VIH
Input HIGH Level
Guaranteed Logic HIGH for Control Pins
VIL
Input LOW Level
Guaranteed Logic LOW for Control Pins
IIN
Input LeakageCurrent (Control Inputs)(2) 0V ≤ VIN ≤ VCC
IOZ
Off-State Output Current (Hi-Z)
Switch ON Resistance
RON(3)
VP
Pass Voltage(2)
Min.
Typ.(1)
Max.
Unit
2
—
—
V
—
—
0.8
V
—
±0.01
±1
μA
0V ≤ VOUT ≤ VCC, Switches OFF
—
±0.01
±1
μA
VCC = Min., VIN = 0V, ION = 30mA
VCC = Min., VIN = 2.4V, ION =15mA
VIN = VCC = 5V, IOUT = -5μA
18
18
3.7
23
25
4
35
40
4.2
Ω
NOTES:
1. Typical values are at VCC = 5.0V, TA = 25°C.
2. Pass Voltage is guaranteed but not production tested.
3. ROUT changed on March 8, 2002. See rear page for more information.
TYPICAL ON RESISTANCE vs VIN AT VCC = 5V
80
R ON
(ohms)
70
60
50
40
30
20
10
0
0.0
0.5
1.0
1.5
2.0
V IN
(Volts)
3
2.5
3.0
3.5
V
IDTQS32X2245
HIGH-SPEED CMOS QUICKSWITCH DOUBLE-WIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
POWER SUPPLY CHARACTERISTICS
Symbol
Test Conditions(1)
Parameter
Max.
Unit
ICCQ
Quiescent Power Supply Current
VCC = Max., VIN = GND or Vcc, f = 0
6
μA
ΔICC
Power Supply Current per Control Input HIGH (2)
VCC = Max., VIN = 3.4V, f = 0
1.5
mA
ICCD
Dynamic Power Supply Current per MHz(3)
VCC = Max., A and B pins open
0.25
mA/MHz
Control Inputs Toggling at 50% Duty Cycle
NOTES:
1. For conditions shown as Min. or Max., use the appropriate values specified under DC Electrical Characteristics.
2. Per TLL driven input (VIN = 3.4V, control inputs only). A and B pins do not contribute to ΔIcc.
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
TA = -40°C to +85°C, VCC = 5.0V ± 5%;
CLOAD = 50pF, RLOAD = 500Ω unless otherwise noted.
Symbol
Parameter
tPLH
Data Propagation Delay (2,3)
tPHL
An to/from Bn
tPZL
Switch Turn-on Delay
tPZH
OE to An/Bn
tPLZ
Switch Turn-off Delay (2)
tPHZ
OE to An/Bn
Min. (1)
Typ.
Max.
Unit
—
—
1.25
ns
0.5
—
6.6
ns
0.5
—
4.5
ns
NOTES:
1. Minimums are guaranteed but not production tested.
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 1.25ns for CL = 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
IDTQS32X2245
HIGH-SPEED CMOS QUICKSWITCH DOUBLE-WIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
QS
XXXXX
Device Type
XX
Package
X
Process
X
Blank
8
Tube or Tray
Tape and Reel
Blank
Industrial (-40°C to +85°C)
Q2G
40-Pin QVSOP - Green
32X2245
High Speed CMOS QuickSwitch Double
Width Bus Switch
As per PCN L0201-02, the Output Resistance (RON) specifications have changed as of March 8, 2002. The original specifications were:
Parameter
RON
Description
Min.
Typ.
Max.
Unit
VCC = Min, VIN = 0V, ION = 30mA
20
28
40
Ω
VCC = Min, VIN = 2.4V, ION = 15mA
20
35
48
Datasheet Document History
02/16/2011
Pg. 5
Updated the ordering information by removing the "IDT" notation, non RoHS part and by adding
Tape and Reel information.
5
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