IDT IDTQS3VH257 High bandwidth bus switch Datasheet

IDTQS3VH257
2.5V / 3.3V QUAD 2:1 MUX/DEMUX HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
QUICKSWITCH® PRODUCTS
2.5V/3.3V QUAD 2:1 MUX/DEMUX
HIGH BANDWIDTH BUS SWITCH
FEATURES:
IDTQS3VH257
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 500MHz
• LVTTL-compatible control Inputs
• Undershoot Clamp Diodes on all switch and control Inputs
• Low I/O capacitance, 4pF typical
• Available in QSOP, SOIC, and TSSOP packages
The QS3VH257 HotSwitch Quad 2:1 multiplexer/demultiplexer is a high
bandwidth bus switch. The QS3VH257 has very low ON resistance,
resulting in under 250ps propagation delay through the switch. The Select
(S) input controls the data flow. The multiplexers/demultiplexers are
enabled when the Enable (E) input is low. 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 near-zero propagation delay, high OFF impedance,
and over-voltage tolerance makes the QS3VH257 ideal for high performance communication applications.
The QS3VH257 is characterized for operation from -40°C to +85°C.
APPLICATIONS:
•
•
•
•
•
Hot-swapping
Multiplexing/demultiplexing
Low distortion analog switch
Replaces mechanical relay
ATM 25/155 switching
FUNCTIONAL BLOCK DIAGRAM
S
E
I0 A
YA
I1 A
I0 B
YB
I1 B
I0 C
YC
I1 C
I0 D
YD
I1 D
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
FEBRUARY 2014
1
c
2014 Integrated Device Technology, Inc.
DSC-5596/15
IDTQS3VH257
2.5V / 3.3V QUAD 2:1 MUX/DEMUX HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
ABSOLUTE MAXIMUM RATINGS(1)
PIN CONFIGURATION
S
1
16
VCC
I0A
2
15
E
I1A
3
14
I0D
YA
4
13
I1D
I0B
5
12
YD
I1B
6
11
I0C
YB
GND
7
8
10
9
I1C
YC
Symbol
Description
VTERM(2)
SupplyVoltage to Ground
Max
Unit
–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
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
0V)
Symbol
(TA = +25°C, F = 1MHz, VIN = 0V, VOUT =
Parameter(1)
Typ.
CIN
Control Inputs
CI/O
Quickswitch Channels
(Switch OFF)
QSOP/ SOIC/ TSSOP
TOP VIEW
CI/O
Quickswitch Channels
(Switch ON)
Demux
Max.
3
5
pF
4
6
pF
Mux
7
9
Demux
10
15
Mux
10
15
NOTE:
1. This parameter is guaranteed but not production tested.
PIN DESCRIPTION
Pin Names
I/O
Ixx
I
Data Inputs
S
I
Select Input
Description
E
I
Enable Input
YA - YD
O
Data Outputs
FUNCTION TABLE(1)
Inputs
Outputs
E
S
YA
YB
YC
YD
Function
H
X
Z
Z
Z
Z
Disable
L
L
I0A
I0B
I0C
I0D
Select 0
L
H
I1A
I1B
I1C
I1D
Select 1
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don't Care
Z = High-Impedence
2
Unit
pF
IDTQS3VH257
2.5V / 3.3V QUAD 2:1 MUX/DEMUX 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
IIN
Input Leakage Current (Control Inputs)
0V ≤ VIN ≤ VCC
—
—
±1
Unit
V
V
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
—
6
8
RON
Switch ON Resistance
Typical 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
NOTE:
1. Typical values are at VCC = 3.3V and TA = 25°C.
TYPICAL ON RESISTANCE vs VIN AT VCC = 3.3V
16
14
RON
12
(ohms)
10
8
6
4
2
0
0.0
0.5
1.0
1.5
2.0
2.5
VIN
(Volts)
3
3.0
3.5
4.0
4.5
5.0
Ω
IDTQS3VH257
2.5V / 3.3V QUAD 2:1 MUX/DEMUX 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
—
2
4
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
VCC = 3.3V, A and B Pins Open, Control Inputs
(4)
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. Mux/demux 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 mux/demux 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
8
ICCD (mA)
6
4
2
0
0
2
4
6
8
10
12
ENABLE FREQUENCY (MHz)
4
14
16
18
20
IDTQS3VH257
2.5V / 3.3V QUAD 2:1 MUX/DEMUX 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
tSEL
tPZH
tPZL
tPHZ
tPLZ
tPZH
tPZL
tPHZ
tPLZ
Parameter
Data Propagation Delay(2,3)
Yx to Ixx or Ixx to Yx
Select Time
S to Yx
Enable Time
S to Ixx
Disable Time
S to Ixx
Enable Time
E to Yx or Ixx
Disable Time
E to Yx or Ixx
fEorS
Operating Frequency - Enable(2,5)
Min. (4)
VCC = 3.3 ± 0.3V (1)
⎯
Max.
0.2
Min. (4)
⎯
Max.
0.2
Unit
ns
1.5
9
1.5
8
ns
1.5
9
1.5
9
ns
1.5
8
1.5
8
ns
1.5
9
1.5
8
ns
1.5
8
1.5
8
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 S or E control input (pass voltage > VCC, VIN = 5V, RLOAD ≥ 1MΩ, no CLOAD).
5
IDTQS3VH257
2.5V / 3.3V QUAD 2:1 MUX/DEMUX 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 PUM P
DRIVER
SINGLE HOT
SW ITCH
Rail-to-Rail Switching
M ULTIPLEXING
CONTROL CIRCUITRY
M EM ORY
CPU
M EM ORY
Multiplexing / Demultiplexing
ZERO DOW N TIM E SYSTEM
PLUG GABLE CAR D/ LIVE SYSTEM
CARD I/O
ON CARD
LOGIC
CONNECTOR
QS3VH XXX
CARD I/O
ON CARD
LOGIC
CONNECTOR
QS3VH XXX
CPU
RAM
BUS
Hot-Swapping
6
IDTQS3VH257
2.5V / 3.3V QUAD 2:1 MUX/DEMUX HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
TEST CIRCUITS AND WAVEFORMS
TEST CONDITIONS
Symbol
VCC = 3.3V ± 0.3V
VCC = 2.5V ± 0.2V
Unit
VLOAD
6
2 x Vcc
V
VIH
3
Vcc
V
(1)
(2)
VT
1.5
VCC/2
V
VLZ
300
150
mV
VHZ
300
150
mV
CL
50
30
pF
SAME PHASE
INPUT TRANSITION
tPLH
tPHL
t PLH
t PHL
OUTPUT
V IH
VT
0V
V OH
VT
V OL
V IH
VT
0V
OPPOSITE PHASE
INPUT TRANSITION
Propagation Delay
V LOAD
V CC
500 Ω
(1, 2)
Pulse
Generator
V IN
CONTROL
INPUT
GND
t PZL
V OUT
D.U.T.
RT
DISABLE
ENABLE
Open
OUTPUT
SW ITCH
NORMALLY
CLO SED
LOW
t PZH
OUTPUT SW ITCH
NORMALLY
OPEN
HIGH
500 Ω
CL
t PLZ
V IH
VT
0V
V LOAD/2
V LO A D /2
VT
VOL
VOL
tPHZ
+
VT
VOH
V O H -V H Z
0V
0V
Test Circuits for All Outputs
NOTE:
1. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH.
Enable and Disable Times
DEFINITIONS:
CL = Load capacitance: includes jig and probe capacitance.
RT = Termination resistance: should be equal to ZOUT of the Pulse Generator.
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 POSITION
Test
Switch
tPLZ/tPZL
VLOAD
tPHZ/tPZH
GND
tPD
Open
7
V LZ
IDTQS3VH257
2.5V / 3.3V QUAD 2:1 MUX/DEMUX HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
QS
XXXXX
XX
Device Type Package
X
Blank
8
Tube or Tray
Tape and Reel
S1G
QG
PAG
SOIC - Green
QSOP - Green
TSSOP - Green
3VH257
2.5V / 3.3V Quad 2:1 Mux/Demux
High Bandwidth Bus Switch
Datasheet Document History
09/01/08
Pg. 4, 8
02/24/14
Pg. 8
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 Adding Tape and Reel information.
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8
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