IDT IDTQS3VH253-Q

IDTQS3VH253
2.5V / 3.3V DUAL 4:1 MUX/DEMUX HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
QUICKSWITCH® PRODUCTS 2.5V / 3.3V IDTQS3VH253
DUAL 4:1 MUX/DEMUX HIGH BANDWIDTH BUS SWITCH
FEATURES:
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 and TSSOP packages
The QS3VH253 HotSwitch Dual 4:1 multiplexer/demultiplexer is a high
bandwidth bus switch. The QS3VH253 has very low ON resistance, resulting
in under 250ps propagation delay through the switch. The Select (Sx) inputs
control the data flow. The multiplexers/demultiplexers are enabled when the
Enable (EA, EB) inputs are 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 impedence, and
over-voltage tolerance makes the QS3VH253 ideal for high performance
communication applications.
The QS3VH253 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
S0
S1
EA
EB
I0 A
I1 A
YA
I2 A
I3 A
I0 B
I1 B
YB
I2 B
I3 B
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
AUGUST 2002
1
c
2002 Integrated Device Technology, Inc.
DSC-5945/7
IDTQS3VH253
2.5V / 3.3V DUAL 4:1 MUX/DEMUX HIGH BANDWIDTH BUS SWITCH
ABSOLUTE MAXIMUM RATINGS(1)
PIN CONFIGURATION
EA
Symbol
1
16
2
S1
INDUSTRIAL TEMPERATURE RANGE
15
VCC
EB
I3A
3
14
S0
I2A
4
13
I3B
I1A
5
12
I2B
I0A
6
11
I1B
YA
GND
7
8
10
9
I0B
YB
Max
Unit
SupplyVoltage to Ground
–0.5 to +4.6
V
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
VTERM(2)
VTERM(3)
Description
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 (TA = +25°C, F = 1MHz, VIN = 0V, VOUT = 0V)
Parameter(1)
Symbol
Typ.
CIN
Control Inputs
CI/O
Quickswitch Channels
(Switch OFF)
QSOP/ TSSOP
TOP VIEW
CI/O
Quickswitch Channels
(Switch ON)
Demux
Select
Outputs
15
16
Mux
12
16
PIN DESCRIPTION
S1
S0
YA
YB
Function
H
X
X
X
Z
X
Disable A
X
H
X
X
X
Z
Disable B
L
L
L
L
I0A
I0B
S1 - 0 = 0
EA, EB
I
Enable Input
YA, YB
O
Data Outputs
L
H
I1A
I1B
S1 - 0 = 1
L
L
H
L
I2A
I2B
S1 - 0 = 2
L
L
H
H
I3A
I3B
S1 - 0 = 3
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don't Care
Z = High-Impedence
2
pF
pF
11
EB
L
5
6
12
EA
L
3
Mux
FUNCTION TABLE(1)
Pin Names
I/O
Description
Ixx
I
Data Inputs
S0, S1
I
Select Input
Unit
4
Demux
NOTE:
1. This parameter is guaranteed but not production tested.
Enable
Max.
pF
IDTQS3VH253
2.5V / 3.3V DUAL 4:1 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
IIN
Input Leakage Current (Control Inputs)
Min.
Typ.(1) Max.
Unit
Guaranteed Logic HIGH
VCC = 2.3V to 2.7V
1.7
—
—
for Control Inputs
VCC = 2.7V to 3.6V
2
—
—
V
Guaranteed Logic LOW
VCC = 2.3V to 2.7V
—
—
0.7
for Control Inputs
VCC = 2.7V to 3.6V
—
—
0.8
0V ≤ VIN ≤ VCC
—
—
±1
µA
V
IOZ
Off-State Current (Hi-Z)
0V ≤ VOUT ≤ 5V, Switches OFF
—
—
±1
µA
I OFF
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
Ω
NOTE:
1. Typical values are at VCC = 3.3V and TA = 25°C.
TYPICAL ON RESISTANCE vs VIN AT VCC = 3.3V
16
14
R ON
(ohms)
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
IDTQS3VH253
2.5V / 3.3V DUAL 4:1 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
—
1
4
mA
∆ICC
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 ∆Icc.
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
6
ICCD (mA)
4
2
0
0
2
4
6
8
10
12
ENABLE FREQUENCY (MHz)
4
14
16
18
20
IDTQS3VH253
2.5V / 3.3V DUAL 4:1 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
fExorSx
Parameter
Data Propagation Delay(2,3)
Yx to Ixx or Ixx to Yx
Select Time
S to Yx
Enable Time
Sx to Ixx
Disable Time
Sx to Ixx
Enable Time
Ex to Yx or Ixx
Disable Time
Ex to Yx or Ixx
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 Sx or Ex control input (pass voltage > VCC, VIN = 5V, RLOAD ≥ 1MΩ, no CLOAD).
5
IDTQS3VH253
2.5V / 3.3V DUAL 4:1 MUX/DEMUX HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
SOME APPLICATIONS FOR HOTSWITCH PRODUCTS
N FET
0 to +5V
Vcc = 3.3V
OE
0 to +5V
+6.5V
CH ARGE PU M P
D RIVER
SINGLE HOT
SW ITC H
Rail-to-Rail Switching
M ULTIPLEXING
C ON TROL C IRC UITR Y
1
CPU
M EM OR Y
4 BANK S
4
M EM OR Y
Multiplexing/Demultiplexing
ZERO DOW N TIM E SYSTEM
PLUG GAB LE CAR D / LIVE SYSTEM
C ARD I/O
ON C ARD
LOGIC
C ON NEC TOR
QS3VH XXX
C ARD I/O
ON C ARD
LOGIC
CONNECTOR
QS3VH XXX
CPU
R AM
BUS
Hot-Swapping
6
IDTQS3VH253
2.5V / 3.3V DUAL 4:1 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
tPLH
tPHL
OUTPUT
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
tPLZ
VLOAD/2
VT
tPHZ
VT
0V
Test Circuits for All Outputs
VIH
VT
0V
VLOAD/2
VOL + VLZ
VOL
VOH
VOH -VHZ
0V
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
IDTQS3VH253
2.5V / 3.3V DUAL 4:1 MUX/DEMUX HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
IDTQS
XXXXX
Device Type
XX
Package
Q
QG
PA
Quarter Size Outline Package
QSOP - Green
Thin Shrink Small Outline Package
3VH253
2.5V / 3.3V Dual 4:1 Mux/Demux High
Bandwidth Bus Switch
DATA SHEET DOCUMENT HISTORY
8/6/2002
Updated according to PCN Logic-0206-11
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8
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