IDTQS3VH16245
2.5V / 3.3V 16-BIT HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
QUICKSWITCH® PRODUCTS
2.5V / 3.3V 16-BIT HIGH
BANDWIDTH BUS SWITCH
FEATURES:
IDTQS3VH16245
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
Ω typical
• Low RON - 4Ω
• 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 - up to 500 MHz
• LVTTL-compatible control Inputs
• Undershoot Clamp Diodes on all switch and control Inputs
• Low I/O capacitance, 4pF typical
• Available in TSSOP package
The QS3VH16245 HotSwitch is a 16-bit high bandwidth bus switch. The
QS3VH16245 has very low ON resistance, resulting in under 250ps
propagation delay through the switch. The switches can be turned ON under
the control of the LVTTL-compatible Output Enable signals (OEx) 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 near-zero propagation delay, high OFF impedance, and
over-voltage tolerance makes the QS3VH16245 ideal for high performance
communications applications.
The QS3VH16245 is characterized for operation from -40°C to +85°C.
APPLICATIONS:
•
•
•
•
•
Hot-swapping
10/100 Base-T, Ethernet LAN switch
Low distortion analog switch
Replaces mechanical relay
ATM 25/155 switching
FUNCTIONAL BLOCK DIAGRAM
A0
A1
A2
A3
A4
A5
A6
A7
OE1
A8
A9
A10 A11
A12
A13 A14 A15
B8
B9
B10 B11
B12
B13 B14 B15
OE2
B0
B1
B2
B3
B4
B5
B6
B7
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
c 2014 Integrated Device Technology, Inc.
FEBRUARY 2014
1
DSC-5876/8
IDTQS3VH16245
2.5V / 3.3V 16-BIT HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
ABSOLUTE MAXIMUM RATINGS(1)
PIN CONFIGURATION
NC
B0
B1
GND
B2
B3
VCC
B4
B5
GND
B6
B7
B8
B9
GND
B10
B11
VCC
B12
B13
GND
B14
B15
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
48
47
46
45
44
43
OE1
A0
A1
GND
A2
A3
42
41
40
VCC
A4
A5
39
38
37
GND
A6
A7
36
35
34
33
32
31
30
29
28
27
26
25
Symbol
Description
Max.
Unit
VTERM(2)
Supply Voltage 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
–3
V
120
mA
-65 to +150
°C
VAC
AC Input Voltage (pulse width ≤20ns)
IOUT
DC Output Current (max. current/pin)
TSTG
Storage Temperature
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
A8
A9
GND
A10
A11
VCC
A12
A13
GND
A14
A15
OE2
o
(TA = +25 C, f = 1MHz, VIN = 0V, VOUT = 0V)
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
NOTE:
1. This parameter is guaranteed but not production tested.
PIN DESCRIPTION
Pin Names
Description
OEx
Output Enables
Ax
Data I/Os
Bx
Data I/Os
FUNCTION TABLE(1)
OE1
TSSOP
TOP VIEW
OE2
A0 - A7
A8 - A15
Function
L
L
B0 - B7
B8 - B15
Connect
L
H
B0 - B7
Z
H
L
Z
B8 - B15
A0 - A7 = B0 - B7, B8 - B15
Disconnect
B0 - B7, Disconnect,
A8 - A15 = B8 - B15
H
H
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
Z = High-Impedence
2
Z
Z
Disconnect
IDTQS3VH16245
2.5V / 3.3V 16-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
Parameter
Test Conditions
Input HIGH Voltage
VIL
Input LOW Voltage
IIN
Input Leakage Current (Control Inputs)
I OZ
IOFF
Typ.(1)
Max.
Unit
V
Guaranteed Logic HIGH
VCC = 2.3V to 2.7V
1.7
—
—
for Control Inputs
VCC = 2.7V to 3.6V
2
—
—
Guaranteed Logic HIGH
VCC = 2.3V to 2.7V
—
—
0.7
for Control Inputs
VCC = 2.7V to 3.6V
—
—
0.8
—
—
±1
μA
Off-State Current (Hi-Z)
—
—
±1
μA
Data Input/Output Power Off Leakage
VIN or VOUT 0V to 5V, VCC = 0V
—
—
±1
μA
ION = 30mA
—
6
8
(Typ. at VCC = 2.5V) VIN = 1.7V
ION = 15mA
—
7
9
VCC = 3V
VIN = 0V
ION = 30mA
—
4
6
VIN = 2.4V
ION = 15mA
—
5
8
Switch ON Resistance
VIN = 0V
NOTE:
1. Typical values are at VCC = 3.3V and TA = 25°C, unless otherwise noted.
TYPICAL ON RESISTANCE vs VIN AT VCC = 3.3V
16
R ON
(ohms)
V
≤ VCC
0V ≤ VOUT ≤ 5V, Switches OFF
0V ≤ VIN
VCC = 2.3V
RON
Min.
14
12
10
8
6
4
2
0
0.0
0.5
1.0
1.5
2.0
2.5
V IN
(Volts)
3
3.0
3.5
4.0
4.5
5.0
Ω
IDTQS3VH16245
2.5V / 3.3V 16-BIT HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
POWER SUPPLY CHARACTERISTICS
Parameter
Test Conditions(1)
ICCQ
Quiescent Power Supply Current
VCC = Max., VIN = GND or VCC, f = 0
ΔICC
Power Supply Current
ICCD
Dynamic Power Supply Current(4)
Symbol
(2,3)
per Input HIGH
VCC = Max., VIN = 3V, f = 0 per Control Input
VCC = 3.3V, A and B Pins Open, Control Inputs
Min.
Typ.
Max.
Unit
—
1.5
3
mA
—
—
30
μA
See Typical ICCD vs Enable Frequency graph below
Toggling @ 50% Duty Cycle
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
20
18
16
ICCD (mA)
14
12
10
8
6
4
2
0
0
2
4
6
8
10
12
ENABLE FREQUENCY (MHZ)
4
14
16
18
20
IDTQS3VH16245
2.5V / 3.3V 16-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
tPZH
tPZL
tPHZ
tPLZ
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.
Min. (4)
Max.
Unit
0.2
⎯
0.2
ns
1.5
8
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 0.2ns 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
IDTQS3VH16245
2.5V / 3.3V 16-BIT HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
SOME APPLICATIONS FOR HOTSWITCH PRODUCTS
NFET
0 to +5V
Vcc = 3.3V
+6.5V
CHARGE PUMP
OE
0 to +5V
DRIVER
SINGLE HOT
SWITCH
Rail-to-Rail Switching
PHY
3VH
SWITCH
4.5VPP
Z = 100 Ω
LOGIC
SIDE
10Mbps to 100Mbps
Z = 100 Ω
>100m
4.5VPP
TWISTED PAIR
LOGIC
SIDE
2VPP
Fast Ethernet Data Switching (LAN Switch)
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
IDTQS3VH16245
2.5V / 3.3V 16-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
SAME PHASE
INPUT TRANSITION
VIH
3
Vcc
V
OUTPUT
VT
1.5
VCC/2
V
VLZ
300
150
mV
VHZ
300
150
mV
CL
50
30
pF
tPLH
tPHL
tPLH
tPHL
VIH
VT
0V
VOH
VT
VOL
VIH
VT
0V
OPPOSITE PHASE
INPUT TRANSITION
Propagation Delay
VLOAD
VCC
500Ω
Pulse(1, 2)
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
tPHZ
VT
0V
Enable and Disable Times
NOTES:
1. Pulse Generator for All Pulses: Rate ≤ 1.0MHz; tF ≤ 2.5ns; tR ≤ 2.5ns.
2. Pulse Generator for All Pulses: Rate ≤ 1.0MHz; tF ≤ 2ns; tR ≤ 2ns.
Switch
VLOAD/2
VT
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
VIH
VT
0V
7
IDTQS3VH16245
2.5V / 3.3V 16-BIT HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
QS
XXXXX
XX
Package
Device Type
X
Blank
8
Tube or Tray
Tape and Reel
PAG
Thin Shrink Small Outline Package-TSSOP Green
3VH16245
2.5V / 3.3V 16-Bit High Bandwidth Bus Switch
DATASHEET DOCUMENT HISTORY
02/24/2014
pg. 1 and 8.
8
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