1
INDUSTRIAL TEMPERATURE RANGE
IDTQS3VH2861
2.5V / 3.3V 10-BIT ACTIVE HIGH AND LOW ENABLE, HIGH BANDWIDTH SWITCH
AUGUST 2002
2002 Integrated Device Technology, Inc.
DSC-5897/8
c
INDUSTRIAL TEMPERATURE RANGE
The IDT logo is a registered trademark 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 V
CC
Isolation under power-off conditions
No DC path to V
CC
or GND
5V tolerant in OFF and ON state
5V tolerant I/Os
Flat R
ON
characteristics over operating range
Rail-to-rail switching 0 - 5V
Bidirectional dataflow with near-zero delay: no added ground
bounce
Excellent R
ON
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
resistors for low noise and line matching
Available in QSOP and TSSOP packages
IDTQS3VH2861
QUICKSWITCH
PRODUCTS
2.5V / 3.3V 10-BIT FLOW-THROUGH
PIN OUT, HIGH BANDWIDTH SWITCH
DESCRIPTION:
The QS3VH2861 HotSwitch is a high bandwidth bus switch with 10-bit
flow-though pin out. The QS3VH2861, with 25
ON resistance and 1.35ns
propagation delay, is ideal for line matching and low noise environments.
The switches are controlled by active low enable (BE) control. 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 QS3VH2861 ideal for high performance
communications applications.
The QS3VH2861 is characterized for operation from -40
C to +85C.
FUNCTIONAL BLOCK DIAGRAM
A
0
A
9
B
0
B
9
B E
2
INDUSTRIAL TEMPERATURE RANGE
IDTQS3VH2861
2.5V / 3.3V 10-BIT ACTIVE HIGH AND LOW ENABLE, HIGH BANDWIDTH SWITCH
PIN CONFIGURATION
Symbol
Description
Max
Unit
V
TERM
(2)
SupplyVoltage to Ground
0.5 to +4.6
V
V
TERM
(3)
DC Switch Voltage V
S
0.5 to +5.5
V
V
TERM
(3)
DC Input Voltage V
IN
0.5 to +5.5
V
V
AC
AC Input Voltage (pulse width
20ns)
3
V
I
OUT
DC Output Current (max. sink current/pin)
120
mA
T
STG
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. V
CC
terminals.
3. All terminals except V
CC
.
Symbol
Parameter
(1)
Typ.
Max.
Unit
C
IN
Control Inputs
3
5
pF
C
I/O
Quickswitch Channels (Switch OFF)
4
6
pF
C
I/O
Quickswitch Channels (Switch ON)
8
12
pF
CAPACITANCE
(T
A
= +25C, F = 1MHz, V
IN
= 0V, V
OUT
= 0V)
NOTE:
1. This parameter is guaranteed but not production tested.
Pin Names
Description
BE
Active LOW Bus Enable
A
0
- A
9
Bus A
B
0
- B
9
Bus B
PIN DESCRIPTION
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
Z = High-Impedence
BE
A
0
- A
9
Function
H
Z
Disconnect
L
B
0
- B
9
Connect
FUNCTION TABLE
(1)
QSOP/ TSSOP
TOP VIEW
24
NC
V
CC
1
23
BE
2
A
0
22
3
A
1
B
0
21
4
A
2
B
1
20
5
A
3
B
2
19
6
A
4
B
3
17
8
A
6
B
5
16
9
A
7
B
6
15
10
A
8
B
7
18
7
A
5
B
4
14
11
A
9
B
8
13
GND
12
B
9
3
INDUSTRIAL TEMPERATURE RANGE
IDTQS3VH2861
2.5V / 3.3V 10-BIT ACTIVE HIGH AND LOW ENABLE, HIGH BANDWIDTH SWITCH
TYPICAL ON RESISTANCE vs V
IN
AT V
CC
= 3.3V
R
ON
(ohms)
V
IN
(Volts)
35
1
2
3
4
5
30
25
20
15
10
5
0
0
40
0.5
1.5
2.5
3.5
4.5
Symbol
Parameter
Test Conditions
Min.
Typ.
(1)
Max.
Unit
V
IH
Input HIGH Voltage
Guaranteed Logic HIGH
V
CC
= 2.3V to 2.7V
1.7
--
--
V
for Control Inputs
V
CC
= 2.7V to 3.6V
2
--
--
V
IL
Input LOW Voltage
Guaranteed Logic LOW
V
CC
= 2.3V to 2.7V
--
--
0.7
V
for Control Inputs
V
CC
= 2.7V to 3.6V
--
--
0.8
I
IN
Input Leakage Current (Control Inputs)
0V
V
IN
V
CC
--
--
1
A
I
OZ
Off-State Current (Hi-Z)
0V
V
OUT
5V, Switches OFF
--
--
1
A
I
OFF
Data Input/Output Power Off Leakage
V
IN
or V
OUT
0V to 5V, V
CC
= 0V
--
--
1
A
V
CC
= 2.3V
V
IN
= 0V
I
ON
= 30mA
18
27
39
R
ON
Switch ON Resistance
Typical at V
CC
= 2.5V
V
IN
= 1.7V
I
ON
= 15mA
18
28
41
V
CC
= 3V
V
IN
= 0V
I
ON
= 30mA
18
25
38
V
IN
= 2.4V
I
ON
= 15mA
18
26
40
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Industrial: T
A
= 40C to +85C, V
CC
= 3.3V 0.3V
NOTE:
1. Typical values are at V
CC
= 3.3V and T
A
= 25C.
4
INDUSTRIAL TEMPERATURE RANGE
IDTQS3VH2861
2.5V / 3.3V 10-BIT ACTIVE HIGH AND LOW ENABLE, HIGH BANDWIDTH SWITCH
TYPICAL I
CCD
vs ENABLE FREQUENCY CURVE AT V
CC
= 3.3V
I
CCD
(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
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 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
I
CCQ
Quiescent Power Supply Current
V
CC
= Max., V
IN
= GND or V
CC
, f = 0
--
1
4
mA
I
CC
Power Supply Current
(2,3)
per Input HIGH
V
CC
= Max., V
IN
= 3V, f = 0 per Control Input
--
--
30
A
I
CCD
Dynamic Power Supply Current
(4)
V
CC
= 3.3V, A and B Pins Open, Control Inputs
See Typical I
CCD
vs Enable Frequency graph below
Toggling @ 50% Duty Cycle
0
2
4
6
8
10
12
14
0
2
4
6
8
10
12
14
16
18
20
5
INDUSTRIAL TEMPERATURE RANGE
IDTQS3VH2861
2.5V / 3.3V 10-BIT ACTIVE HIGH AND LOW ENABLE, HIGH BANDWIDTH SWITCH
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
T
A
= -40C to +85C
V
CC
= 2.5 0.2V
(1)
V
CC
= 3.3 0.3V
(1)
Symbol
Parameter
Min
.
(4)
Max.
Min
.
(4)
Max.
Unit
t
PLH
Data Propagation Delay
(2,3)
0.9
1.35
ns
t
PHL
Ax to Bx or Bx to Ax
t
PZH
Switch Turn-On Delay
1.5
9
1.5
8
ns
t
PZL
BE to Ax or Bx
t
PHZ
Switch Turn-Off Delay
1.5
7.5
1.5
7.5
ns
t
PLZ
BE to Ax or Bx
f
BE
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 C
L
= 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 BE control input (pass voltage > V
CC
, V
IN
= 5V, R
LOAD
1M, no C
LOAD
).
6
INDUSTRIAL TEMPERATURE RANGE
IDTQS3VH2861
2.5V / 3.3V 10-BIT ACTIVE HIGH AND LOW ENABLE, HIGH BANDWIDTH SWITCH
CHARGE PUMP
OE
Vcc = 3.3V
0 to +5V
NFET
+6.5V
DRIVER
0 to +5V
SINGLE HOT
SW ITCH
CARD I/O
ON CARD
LOGIC
CON
N
E
C
T
O
R
QS
3V
H
XXX
CPU
RAM
BUS
CARD I/O
ON CARD
LOGIC
CON
N
E
C
T
O
R
QS
3V
H
X
X
X
PLUG GABLE CARD/ LIVE SYSTEM
ZERO DOW N TIME SYSTEM
Rail-to-Rail Switching
SOME APPLICATIONS FOR HOTSWITCH PRODUCTS
Hot-Swapping
7
INDUSTRIAL TEMPERATURE RANGE
IDTQS3VH2861
2.5V / 3.3V 10-BIT ACTIVE HIGH AND LOW ENABLE, HIGH BANDWIDTH SWITCH
Open
V
LOAD
G ND
V
CC
Pulse
Generator
D.U.T.
500
500
C
L
R
T
V
IN
V
OUT
(1, 2)
SAM E PH ASE
IN PU T TRANSITION
O PPOSITE PH ASE
IN PUT TR AN SITION
0V
0V
V
OH
V
OL
t
PLH
t
PHL
t
PHL
t
PLH
OU TPUT
V
IH
V
T
V
T
V
IH
V
T
C ON TRO L
IN PU T
t
PLZ
0V
O UTPU T
N OR M ALLY
LOW
t
PZ H
0V
SW ITCH
CLO SED
OUTPU T
N OR M ALLY
H IGH
EN ABLE
D ISABLE
SW ITCH
O PE N
t
PHZ
0 V
V
O L +
V
LZ
V
O H
V
T
V
T
t
PZL
V
LOAD/2
V
LO A D /2
V
IH
V
T
V
O L
V
O H -
V
H Z
TEST CIRCUITS AND WAVEFORMS
TEST CONDITIONS
Symbol
V
CC
(1)
= 3.3V 0.3V
V
CC
(2)
= 2.5V 0.2V
Unit
V
LOAD
6
2 x Vcc
V
V
IH
3
Vcc
V
V
T
1.5
V
CC
/2
V
V
LZ
300
150
mV
V
HZ
300
150
mV
C
L
50
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; t
F
2.5ns; t
R
2.5ns.
2. Pulse Generator for All Pulses: Rate
10MHz; t
F
2ns; t
R
2ns.
DEFINITIONS:
C
L
= Load capacitance: includes jig and probe capacitance.
R
T
= Termination resistance: should be equal to Z
OUT
of the Pulse Generator.
SWITCH POSITION
Test
Switch
t
PLZ
/
t
PZL
V
LOAD
t
PHZ/
t
PZH
GND
t
PD
Open
Propagation Delay
Test Circuits for All Outputs
Enable and Disable Times
8
INDUSTRIAL TEMPERATURE RANGE
IDTQS3VH2861
2.5V / 3.3V 10-BIT ACTIVE HIGH AND LOW ENABLE, HIGH BANDWIDTH SWITCH
ORDERING INFORMATION
IDTQS
XXXXX
XX
Package
Device Type
3VH2861
2.5V / 3.3V 10-Bit Flow Though Pin Out, High
Bandwidth Switch
Q
PA
Quarter Size Outline Package
Thin Shrink Small Outline Package
CORPORATE HEADQUARTERS
for SALES:
for Tech Support:
2975 Stender Way
800-345-7015 or 408-727-6116
logichelp@idt.com
Santa Clara, CA 95054
fax: 408-492-8674
(408) 654-6459
www.idt.com
8/6/2002
Updated according to PCN Logic-0206-11
DATA SHEET DOCUMENT HISTORY
PDF 
ZIP