IDTQS34XVH2245
2.5V / 3.3V 32-BIT HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
QUICKSWITCH® PRODUCTS
2.5V / 3.3V 32-BIT HIGH
BANDWIDTH BUS SWITCH
FEATURES:
IDTQS34XVH2245
DESCRIPTION:
• 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
• VCC 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
Ω resistors for low noise and line matching
• 25Ω
• Available in 80-pin QVSOP package
The QS34XVH2245 is a high bandwidth, 32-bit bus switch. The
QS34XVH2245 with 25Ω 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 individual LVTTL-compatible Output
Enable (OEx) signals 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 impedance at the
terminals.
The combination of small propagation delay, high OFF impedance,
and over-voltage tolerance makes the QS34XVH2245 ideal for high
performance communications applications.
The QS34XVH2245 is characterized for operation from -40°C to
+85°C.
APPLICATIONS:
•
•
•
•
Hot-swapping
Low distortion analog switch
Replaces mechanical relay
ATM 25/155 switching
FUNCTIONAL BLOCK DIAGRAM
A0
A1
A2
A3
A4
A5
A6
A7
A16 A17 A18 A19 A20 A21 A22 A23
OE1
OE3
B0
B1
B2
B3
A8
A9 A10 A11
B7
B16 B17 B18 B19 B20 B21 B22 B23
A12 A13 A14 A15
A24 A25 A26 A27 A28 A29 A30 A31
B4
B5
B6
OE2
OE4
B8
B9 B10 B11
B24 B25 B26 B27 B28 B29 B30 B31
B12 B13 B14 B15
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
JANUARY 2013
INDUSTRIAL TEMPERATURE RANGE
1
c 2012 Integrated Device Technology, Inc.
DSC-5592/14
IDTQS34XVH2245
2.5V / 3.3V 32-BIT HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
ABSOLUTE MAXIMUM RATINGS(1)
PIN CONFIGURATION
NC
1
80
Symbol
Description
VTERM(2)
SupplyVoltage to Ground
Max
Unit
–0.5 to +4.6
V
Vcc
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
A0
2
79
OE1
A1
3
78
B0
A2
4
77
B1
A3
5
76
B2
A4
6
75
B3
A5
7
74
B4
A6
8
73
B5
A7
9
72
B6
71
B7
70
Vcc
69
OE2
68
B8
67
B9
66
B10
65
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 .
GND
10
NC
11
A8
12
A9
13
A10
14
A11
15
A12
16
A13
17
A14
18
A15
19
GND
20
61
B15
NC
21
60
Vcc
A16
22
59
OE3
A17
23
58
B16
A18
24
57
B17
Pin Names
A19
25
56
B18
OEx
I
Ax
I/O
Bus A
Bx
I/O
Bus B
CAPACITANCE
0V)
Symbol
(TA = +25°C, F = 1MHz, VIN = 0V, VOUT =
(1)
Parameter
Typ.
Max.
Unit
3
5
pF
CIN
Control Inputs
B11
CI/O
Quickswitch Channels (Switch OFF)
4
6
pF
64
B12
CI/O
Quickswitch Channels (Switch ON)
8
12
pF
63
B13
62
B14
A20
26
55
B19
A21
27
54
B20
A22
28
53
B21
A23
29
52
B22
GND
30
51
B23
NC
31
50
Vcc
A24
32
49
OE4
A25
33
48
B24
A26
34
47
B25
A27
35
46
B26
A28
36
45
B27
A29
37
44
B28
A30
38
43
B29
A31
39
42
B30
GND
40
41
B31
NOTE:
1. This parameter is guaranteed but not production tested.
PIN DESCRIPTION
I/O
Description
Output Enable
FUNCTION TABLE(1)
Function
OEx
H
Disconnected
L
Connect (Ax = Bx)
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
QVSOP
TOP VIEW
2
IDTQS34XVH2245
2.5V / 3.3V 32-BIT HIGH BANDWIDTH 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 = 3.3V ±0.3V
Symbol
VIH
VIL
Parameter
Test Conditions
Input HIGH Voltage
Input LOW Voltage
Min.
Typ.(1) Max.
Guaranteed Logic HIGH
VCC = 2.3V to 2.7V
1.7
—
—
for Control Inputs
VCC = 2.7V to 3.6V
2
—
—
Guaranteed Logic LOW
VCC = 2.3V to 2.7V
—
—
0.7
for Control Inputs
VCC = 2.7V to 3.6V
—
—
0.8
Unit
V
V
IIN
Input Leakage Current (Control Inputs)
0V ≤ VIN ≤ VCC
—
—
±1
μA
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
VCC = 3V
VIN = 0V
ION = 30mA
18
25
38
VIN = 2.4V
ION = 15mA
18
26
40
Ω
NOTE:
1. Typical values are at VCC = 3.3V and TA = 25°C.
TYPICAL ON RESISTANCE vs VIN AT VCC = 3.3V
40
35
30
RON
(ohms)
25
20
15
10
5
0
0
0.5
1
1.5
2
2.5
VIN
(Volts)
3
3
3.5
4
4.5
5
IDTQS34XVH2245
2.5V / 3.3V 32-BIT HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
POWER SUPPLY CHARACTERISTICS
Symbol
Test Conditions(1)
Parameter
Min.
Typ.
Max.
Unit
ICCQ
Quiescent Power Supply Current
VCC = Max., VIN = GND or VCC, f = 0
—
8
16
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
Toggling @ 50% Duty Cycle
(4)
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.
TYPICAL ICCD vs ENABLE FREQUENCY CURVE AT VCC = 3.3V
12
10
ICCD (mA)
8
6
4
2
0
0
2
4
6
8
10
12
ENABLE FREQUENCY (MHz)
4
14
16
18
20
IDTQS34XVH2245
2.5V / 3.3V 32-BIT HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
TA = -40°C to +85°C
VCC = 2.5 ± 0.2V (1)
Symbol
tPLH
tPHL
tPZL
tPZH
tPLZ
tPHZ
fOEx
Parameter
Data Propagation Delay(2,3)
Ax to/from Bx
Switch Turn-On Delay
OEx to Ax/Bx
Switch Turn-Off Delay
OEx to Ax/Bx
Operating Frequency - Enable(2,5)
Min. (4)
VCC = 3.3 ± 0.3V (1)
⎯
Max.
0.9
Min. (4)
⎯
Max.
1.35
Unit
ns
1.5
9
1.5
8
ns
1.5
7.5
1.5
7.5
ns
⎯
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).
5
IDTQS34XVH2245
2.5V / 3.3V 32-BIT HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
SOME APPLICATIONS FOR HOTSWITCH PRODUCTS
NFET
0 to +5V
Vcc = 3.3V
OE
0 to +5V
+6.5V
CHARGE PUMP
DRIVER
SINGLE HOT
SWITCH
Rail-to-Rail Switching
ZERO DOWN TIME SYSTEM
PLUGGABLE CARD/ LIVE SYSTEM
CARD I/O
ON CARD
LOGIC
CONNECTOR
QS3VHXXX
CPU
CARD I/O
ON CARD
LOGIC
CONNECTOR
QS3VHXXX
RAM
BUS
Hot-Swapping
6
IDTQS34XVH2245
2.5V / 3.3V 32-BIT HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
TEST CIRCUITS AND WAVEFORMS
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
VT
1.5
VCC/2
V
VLZ
300
150
mV
VHZ
300
150
mV
CL
50
30
pF
SAME PHASE
INPUT TRANSITION
tPLH
tPHL
tPLH
tPHL
OUTPUT
VIH
VT
0V
VOH
VT
VOL
VIH
VT
0V
OPPOSITE PHASE
INPUT TRANSITION
Propagation Delay
VLOAD
VCC
500Ω
(1, 2)
Pulse
Generator
VIN
CONTROL
INPUT
GND
tPZL
VOUT
D.U.T.
RT
DISABLE
ENABLE
Open
OUTPUT
SWITCH
NORMALLY CLOSED
LOW
tPZH
OUTPUT SWITCH
NORMALLY
OPEN
HIGH
500Ω
CL
Test Circuits for All Outputs
SWITCH POSITION
tPLZ/tPZL
VLOAD
tPHZ/tPZH
GND
tPD
Open
V
T
0V
Enable and Disable Times
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.
Switch
tPHZ
VLOAD/2
VOL + VLZ
VOL
VOH
VOH -VHZ
0V
NOTE:
1. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH.
DEFINITIONS:
CL = Load capacitance: includes jig and probe capacitance.
RT = Termination resistance: should be equal to ZOUT of the Pulse Generator.
Test
tPLZ
VLOAD/2
VT
VIH
VT
0V
7
IDTQS34XVH2245
2.5V / 3.3V 32-BIT HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
QS
XXXXX
XX
Device Type Package
X
Blank
8
Tube or Tray
Tape and Reel
Q3G
80-Pin QVSOP - Green
34XVH2245
2.5V / 3.3V 32-Bit High Bandwidth Bus Switch
Datasheet Document History
09/01/08
Pg. 4, 8
01/17/13
Pg. 5
Revise ICCQ Typ. and Max. Remove non green package version and updated the ordering
information by removing the “IDT” notation.
Updated the ordering information by addingTape and Reel information.
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6024 Silver Creek Valley Road
San Jose, CA 95138
for SALES:
800-345-7015 or 408-284-8200
fax: 408-284-2775
www.idt.com
8
for Tech Support:
logichelp@idt.com
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