IDTQS32X2384
HIGH-SPEED CMOS 20-BIT BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
QUICKSWITCH® PRODUCTS
HIGH-SPEED CMOS
20-BIT BUS SWITCH
DESCRIPTION:
FEATURES:
•
•
•
•
•
•
•
Enhanced N channel FET with no inherent diode to VCC
Low propagation delay and zero ground bounce
Ω resistors for low noise
25Ω
Undershoot Clamp Diodes on all switch and control Inputs
Four enables control five bits each
TTL-compatible input and output levels
Available in 48-pin QVSOP package
The QS32X2384 provides a set of twenty high-speed CMOS TTLcompatible bus switches. The QS32x2384 also includes internal 25Ω
series termination resistors to reduce reflection noise in high-speed
applications. The Bus Enable (BE) signals turn the switches on. Four Bus
Enable signals are provided, one for each of five bits of the 20-bit bus. The
‘384 family of QuickSwitch products is ideal for switching wide digital buses,
as well as hotplug buffering, and 5V to 3V conversion.
The QS32X2384 is characterized for operation at -40°C to +85°C.
APPLICATIONS:
•
•
•
•
•
•
IDTQS32X2384
Hot-swapping, hot-docking
Voltage translation (5V to 3.3V)
Power conservation
Capacitance reduction and isolation
Bus isolation
Clock gating
FUNCTIONAL BLOCK DIAGRAM
A0
B0
A10
B10
A4
B4
A14
B14
A5
B5
A15
B15
A9
B9
A19
B19
BEA
BEC
BED
BEB
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
c
2011 Integrated Device Technology, Inc.
FEBRUARY 2011
1
DSC-5725/4
IDTQS32X2384
HIGH-SPEED CMOS 20-BIT BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
ABSOLUTE MAXIMUM RATINGS(1)
PIN CONFIGURATION
Symbol
Description
Max
Unit
VTERM(2)
SupplyVoltage to Ground
–0.5 to +7
V
VTERM(3)
DC Switch Voltage VS
–0.5 to +7
V
–0.5 to +7
V
BEA
1
48
VCC
VTERM(3)
DC Input Voltage VIN
B0
2
47
B19
VAC
AC Input Voltage (pulse width ≤20ns)
–3
V
A0
3
46
A19
IOUT
DC Output Current (max. sink current/pin)
120
mA
A1
4
45
A18
PMAX
Maximum Power Dissipation (TA = 85°C)
B1
5
44
B18
TSTG
Storage Temperature
B2
6
43
B17
A2
7
42
A17
A3
8
41
A16
B3
9
40
B16
B4
10
39
B15
A4
11
38
A15
GND
12
37
BEB
BEC
13
36
VCC
B5
14
35
B14
A5
15
34
A14
A6
16
33
A13
B6
17
32
B13
B7
18
31
B12
A7
19
30
A12
A8
20
29
A11
B8
21
28
B11
B9
22
27
B10
A9
23
26
GND
24
25
A10
BED
CAPACITANCE (TA = +25°C, F = 1MHz, VIN = 0V, VOUT = 0V)
I/O
I/O
B0 - B19
I/O
BEA
I
Enable, 0 - 4
BEB
I
Enable, 15 - 19
BEC
I
Enable, 5 - 9
BED
I
Enable, 10 - 14
Pins
Typ.
Max.(1)
Unit
Control Inputs
3
5
pF
Quickswitch Channels (Switch OFF)
5
7
pF
NOTE:
1. This parameter is guaranteed but not production tested.
FUNCTION TABLE(1)
PIN DESCRIPTION
A0 - A19
W
°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. VCC terminals.
3. All terminals except VCC .
QVSOP
TOP VIEW
Pin Names
0.5
–65 to +150
BEA
BEB
B0 - B4
B15 - B19
Function
H
H
Z
Z
Disconnect
L
H
A0 - A4
Z
Connect
H
L
Z
A15 - A19
Connect
L
L
A0 - A4
A15 - A19
Connect
BEC
BED
B5 - B9
B10 - B14
Function
H
H
Z
Z
Disconnect
L
H
A5 - A9
Z
Connect
H
L
Z
A10 - A14
Connect
L
L
A5 - A9
A10 - A14
Connect
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don't care
Z = High-Impedence
Description
Bus A
Bus B
2
IDTQS32X2384
HIGH-SPEED CMOS 20-BIT 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
Min.
Typ.(1)
Max.
Unit
VIH
Input HIGH Voltage
Guaranteed Logic HIGH for Control Pins
2
—
—
V
VIL
Input LOW Voltage
Guaranteed Logic LOW for Control Pins
—
—
0.8
V
IIN
Input Leakage Current (Control Inputs)
0V ≤ VIN ≤ VCC
—
±0.01
±1
μA
IOZ
Off-State Current (Hi-Z)
0V ≤ VOUT ≤ VCC, Switches OFF
—
±0.01
±1
μA
RON
Switch ON Resistance(2)
VCC = Min., VIN = 0V, ION = 30mA
20
28
40
Ω
VCC = Min., VIN = 2.4V, ION = 15mA
20
35
48
VCC = 5V, IOUT = -5μA
3.7
4
4.2
VP
Pass Voltage(3)
NOTES:
1. Typical values are at VCC = 5.0V and TA = 25°C.
2. Max value of RON is guaranteed but not production tested.
3. Pass voltage is guaranteed but not production tested.
TYPICAL ON RESISTANCE vs VIN AT VCC = 5V
80
70
R ON
(ohms)
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
IDTQS32X2384
HIGH-SPEED CMOS 20-BIT BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
POWER SUPPLY CHARACTERISTICS
Symbol
Parameter
Test Conditions(1)
ICCQ
Quiescent Power Supply Current
VCC = Max., VIN = GND or VCC, f = 0
ΔICC
Power Supply Current per Input HIGH(2)
VCC = Max., VIN = 3.4V, f = 0
ICCD
Dynamic Power Supply Current per MHz(3) VCC = Max., A and B Pins Open
Max.
Unit
3
mA
2.5
mA
0.25
mA/MHz
Control Input Toggling @ 50% Duty Cycle
NOTES:
1. For conditions shown as Min. or Max., use the appropriate values specified under DC Electrical Characteristics.
2. Per TTL 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
Symbol
tPLH
tPHL
tPZL
tPZH
tPLZ
tPHZ
Parameter
Data Propagation Delay(2,4)
Ax to Bx, Bx to Ax
Switch Turn-On Delay
BEx to Ax, Bx
Switch Turn-Off Delay(2)
BEx to Ax, Bx
Min.(1)
Typ.
Max.
Unit
⎯
⎯
1.25(3)
ns
1.5
⎯
7.5
ns
1.5
⎯
5.5
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 at CL = 50pF.
4. 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
IDTQS32X2384
HIGH-SPEED CMOS 20-BIT 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)
Q1G
48-Pin QVSOP - Green
32X2384
High Speed CMOS 20-Bit Bus Switch
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.
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www.idt.com
5
for Tech Support:
logichelp@idt.com
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