1
INDUSTRIAL TEMPERATURE RANGE
IDTQS32XVH2245
2.5V / 3.3V 16-BIT HIGH BANDWIDTH BUS SWITCH
JUNE 2011
c
INDUSTRIAL TEMPERATURE RANGE
DESCRIPTION:
The QS32XVH2245 HotSwitch is a high bandwidth, 16-bit bus switch. The
QS32XVH2245, with 25Ω ON resistance and 1.35ns propagation delay, is
ideal for line matching and low noise environments. The switches can be turned
ON under the control of the LVTTL-compatible Output Enable (OEx) signal for
bidirectional data flow with no added delay or ground bounce. In the ON state,
the switches can pass signals up to 5V. In the OFF state, the switches offer very
high impedence at the terminals.
The combination of small propagation delay, high OFF impedance, and
over-voltage tolerance makes the QS32XVH2245 ideal for hot-swapping
applications.
The QS32XVH2245 is characterized for operation from -40°C to +85°C.
IDT and the IDT logo is a registered trademarks of Integrated Device Technology, Inc.
APPLICATIONS:
• Hot-swapping
• Low distortion analog switch
• Replaces mechanical relay
• ATM 25/155 switching
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
• Flat RON characteristics over operating range
• Rail-to-rail switching 0 - 5V
• Bidirectional dataflow with near-zero delay: no added ground
bounce
• Excellent RON matching between channels
•V
CC operation: 2.3V to 3.6V
• High bandwidth
• LVTTL-compatible control Inputs
• Undershoot Clamp Diodes on all switch and control Inputs
• Low I/O capacitance, 4pF typical
•25
ΩΩ
ΩΩ
Ω resistors for low noise and line matching
• Available in 40-pin QVSOP package
IDTQS32XVH2245
QUICKSWITCH® PRODUCTS
2.5V / 3.3V 16-BIT HIGH
BANDWIDTH BUS SWITCH
FUNCTIONAL BLOCK DIAGRAM
B
0
OE
1
A
0
B
1
A
1
B
2
A
2
B
3
A
3
B
4
A
4
B
5
A
5
B
6
A
6
B
7
A
7
B
8
OE
2
A
8
B
9
A
9
B
10
A
10
B
11
A
11
B
12
A
12
B
13
A
13
B
14
A
14
B
15
A
15
2011 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice. DSC-5777/14
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INDUSTRIAL TEMPERATURE RANGE
IDTQS32XVH2245
2.5V / 3.3V 16-BIT HIGH BANDWIDTH BUS SWITCH
PIN CONFIGURATION
Symbol Description Max Unit
VTERM(2) SupplyVoltage to Ground –0.5 to +4.6 V
VTERM(3) DC Switch Voltage VS–0.5 to +5.5 V
VTERM(3) DC Input Voltage VIN –0.5 to +5.5 V
VAC AC Input Voltage (pulse width ≤20ns) –3 V
IOUT DC Output Current (max. sink current/pin) 120 mA
TSTG Storage Temperature –65 to +150 °C
ABSOLUTE MAXIMUM RATINGS(1)
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 .
Symbol Parameter(1) Typ. Max. Unit
CIN Control Inputs 3 5 pF
CI/O Quickswitch Channels (Switch OFF) 4 6 pF
CI/O Quickswitch Channels (Switch ON) 8 12 pF
CAPACITANCE (TA = +25°C, F = 1MHz, VIN = 0V, VOUT = 0V)
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
OEx Function
H Disconnected
L Connect (Ax = Bx)
FUNCTION TABLE(1)
NOTE:
1. This parameter is guaranteed but not production tested.
Pin Names Description
OEx Output Enable
A x Data I/Os
B x Data I/Os
PIN DESCRIPTION
QVSOP
TOP VIEW
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
NC
A0
A1
A2
A3
A4
A5
A6
A7
GND
NC
A8
A9
A10
A11
A12
A13
A14
A15
GND
OE1
B0
B1
B2
B3
B4
B5
B6
B7
V
CC
OE2
B8
B9
B10
B11
B12
B13
B14
B15
V
CC
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INDUSTRIAL TEMPERATURE RANGE
IDTQS32XVH2245
2.5V / 3.3V 16-BIT HIGH BANDWIDTH BUS SWITCH
TYPICAL ON RESISTANCE vs VIN AT VCC = 3.3V
35
12
34 5
30
25
20
15
10
5
0
0
40
0.5 1.5 2.5 3.5 4.5
RON
(ohms)
VIN
(Volts)
Symbol Parameter Test Conditions Min. Typ.(1) Max. Unit
VIH Input HIGH Voltage Guaranteed Logic HIGH VCC = 2.3V to 2.7V 1.7 — — V
for Control Inputs VCC = 2.7V to 3.6V 2 — —
VIL Input LOW Voltage Guaranteed Logic LOW VCC = 2.3V to 2.7V — — 0.7 V
for Control Inputs VCC = 2.7V to 3.6V — — 0.8
IIN Input Leakage Current (Control Inputs) 0V ≤ VIN ≤ VCC ——±1μA
IOZ Off-State Current (Hi-Z) 0V ≤ VOUT ≤ 5V, Switches OFF — — ±1 μA
IOFF Data Input/Output Power Off Leakage VIN or VOUT 0V to 5V, VCC = 0V — — ±1 μA
VCC = 2.3V VIN = 0V ION = 30mA 18 27 39
RON Switch ON Resistance Typical at VCC = 2.5V VIN = 1.7V ION = 15mA 18 28 41 Ω
VCC = 3V VIN = 0V ION = 30mA 18 25 38
VIN = 2.4V ION = 15mA 18 26 40
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Industrial: TA = –40°C to +85°C, VCC = 3.3V ±0.3V
NOTE:
1. Typical values are at VCC = 3.3V and TA = 25°C.
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INDUSTRIAL TEMPERATURE RANGE
IDTQS32XVH2245
2.5V / 3.3V 16-BIT HIGH BANDWIDTH BUS SWITCH
TYPICAL ICCD vs ENABLE FREQUENCY CURVE AT VCC = 3.3V
ICCD (mA)
ENABLE FREQUENCY (MHz)
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 ΔIcc.
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.
POWER SUPPLY CHARACTERISTICS
Symbol Parameter Test Conditions(1) Min. Typ. Max. Unit
ICCQ Quiescent Power Supply Current VCC = Max., VIN = GND or VCC, f = 0 — 4 8 mA
ΔICC Power Supply Current (2,3) per Input HIGH VCC = Max., VIN = 3V, f = 0 per Control Input — — 30 μA
ICCD Dynamic Power Supply Current per Output VCC = 3.3V, A and B Pins Open, Control Inputs See Typical ICCD vs Enable Frequency graph below
Enable Control Input(4) Toggling @ 50% Duty Cycle
0
2
4
6
8
10
12
0 2 4 6 8 10 12 14 16 18 20
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INDUSTRIAL TEMPERATURE RANGE
IDTQS32XVH2245
2.5V / 3.3V 16-BIT HIGH BANDWIDTH BUS SWITCH
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
TA = -40°C to +85°C
VCC = 2.5 ± 0.2V (1) VCC = 3.3 ± 0.3V (1)
Symbol Parameter Min. (4) Max. Min. (4) Max. Unit
tPLH Data Propagation Delay(2,3) ⎯0.9 ⎯1.35 ns
tPHL Ax to/from Bx
tPZL Switch Turn-On Delay 1.5 9 1.5 8 ns
tPZH OEx to Ax/Bx
tPLZ Switch Turn-Off Delay 1.5 7.5 1.5 7.5 ns
tPHZ OEx to Ax/Bx
fOEx Operating Frequency - Enable(2,5) ⎯10 ⎯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 1.35ns at 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. Minimums are guaranteed but not production tested.
5. Maximum toggle frequency for OEx control input (pass voltage > VCC, VIN = 5V, RLOAD ≥ 1MΩ, no CLOAD).
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INDUSTRIAL TEMPERATURE RANGE
IDTQS32XVH2245
2.5V / 3.3V 16-BIT HIGH BANDWIDTH BUS SWITCH
CHARGE PUMP
OE
Vcc = 3.3V
0 to +5V NFET
+6.5V
DRIVER
0 to +5V
SINGLE HOT
SWITCH
CARD I/O ON CARD
LOGIC
CONNECTOR
QS3VHXXX
CPU
RAM
BUS
CARD I/O ON CARD
LOGIC
CONNECTOR
QS3VHXXX
PLUGGABLE CARD/ LIVE SYSTEM ZERO DOWN TIME SYSTEM
Rail-to-Rail Switching
SOME APPLICATIONS FOR HOTSWITCH PRODUCTS
Hot-Swapping
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INDUSTRIAL TEMPERATURE RANGE
IDTQS32XVH2245
2.5V / 3.3V 16-BIT HIGH BANDWIDTH BUS SWITCH
TEST CIRCUITS AND WAVEFORMS
Open
V
LOAD
GND
V
CC
Pulse
Generator D.U.T.
500Ω
500Ω
C
L
R
T
V
IN
V
OUT
(1, 2)
SAME PHASE
INPUT TRANSITION
OPPOSITE PHASE
INPUT TRANSITION
0V
0V
VOH
V
OL
t
PLH
t
PHL
t
PHL
t
PLH
OUTPUT
VIH
VT
VT
VIH
VT
CONTROL
INPUT
t
PLZ
0V
OUTPUT
NORMALLY
LOW t
PZH
0V
SWITCH
CLOSED
OUTPUT
NORMALLY
HIGH
ENABLE DISABLE
SWITCH
OPEN
t
PHZ
0V
V
OL +
V
LZ
V
OH
V
T
V
T
t
PZL
V
LOAD/2
V
LOAD/2
V
IH
V
T
V
OL
V
OH -
V
HZ
TEST CONDITIONS
Symbol VCC(1)= 3.3V ± 0.3V VCC(2)= 2.5V ± 0.2V Unit
VLOAD 6 2 x Vcc V
VIH 3 Vcc V
VT1.5 VCC/2 V
VLZ 300 150 mV
VHZ 300 150 mV
CL50 30 pF
NOTE:
1. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH.
NOTES:
1. Pulse Generator for All Pulses: Rate ≤ 10MHz; tF ≤ 2.5ns; tR ≤ 2.5ns.
2. Pulse Generator for All Pulses: Rate ≤ 10MHz; tF ≤ 2ns; tR ≤ 2ns.
DEFINITIONS:
CL = Load capacitance: includes jig and probe capacitance.
RT = Termination resistance: should be equal to ZOUT of the Pulse Generator.
SWITCH POSITION
Test Switch
tPLZ/tPZL VLOAD
tPHZ/tPZH GND
tPD Open
Propagation Delay
Test Circuits for All Outputs
Enable and Disable Times
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INDUSTRIAL TEMPERATURE RANGE
IDTQS32XVH2245
2.5V / 3.3V 16-BIT HIGH BANDWIDTH BUS SWITCH
ORDERING INFORMATION
CORPORATE HEADQUARTERS for SALES: for Tech Support:
6024 Silver Creek Valley Road 800-345-7015 or 408-284-8200 logichelp@idt.com
San Jose, CA 95138 fax: 408-284-2775
www.idt.com
Datasheet Document History
09/01/08 Pg. 4, 8 Revise ICCQ Typ. and Max. Remove non green package version and updated the ordering
information by removing the “IDT” notation.
06/14/11 Pg. 8 Updated ordering information to include tube or tray and tape & reel.
QS XXXXX XX
Package
Device Type
32XVH2245 2.5V / 3.3V 16-Bit High Bandwidth Bus Switch
Q2G 40-Pin QVSOP - Green
Blank Industrial (-40°C to +85°C)
X
Process
X
Blank
8
Tube or Tray
Tape and Reel
