IDT IDTQS3VH2245Q Quickswitch products 2.5v / 3.3v 8-bit high bandwidth bus switch Datasheet

IDTQS3VH2245
2.5V / 3.3V 8-BIT HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
QUICKSWITCH® PRODUCTS
2.5V / 3.3V 8-BIT HIGH
BANDWIDTH BUS SWITCH
FEATURES:
IDTQS3VH2245
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 QSOP and TSSOP packages
The QS3VH2245 is a high bandwidth 8-bit bus switch. The QS3VH2245,
with 25Ω ON 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 the LVTTL-compatible Output Enable signal 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 impedence at
the terminals.
The combination of small propagation delay, high OFF impedance, and
over-voltage tolerance makes the QS3VH2245 ideal for high performance
communication applications.
The QS3VH2245 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
B0
B1
B2
B3
B4
B5
B6
B7
OE
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
MARCH 2003
INDUSTRIAL TEMPERATURE RANGE
1
c
2003 Integrated Device Technology, Inc.
DSC-5591/6
IDTQS3VH2245
2.5V / 3.3V 8-BIT HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
ABSOLUTE MAXIMUM RATINGS(1)
PIN CONFIGURATION
Symbol
NC
1
20
VCC
A0
A1
2
3
19
OE
18
B0
A2
4
17
B1
A3
5
16
B2
A4
6
15
B3
A5
7
14
B4
A6
8
13
B5
A7
9
12
B6
GND
10
11
B7
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
QSOP/ TSSOP
TOP VIEW
Typ.
Max.
Unit
3
5
pF
CIN
Control Inputs
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
OE
Output Enable
Ax
Data I/Os
Bx
Data I/Os
FUNCTION TABLE(1)
Function
OE
H
Disconnected
L
Connect (Ax = Bx)
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
2
IDTQS3VH2245
2.5V / 3.3V 8-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
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
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
R ON
(ohms)
35
30
25
20
15
10
5
0
0
0.5
1
1.5
2
VIN
(Volts)
3
2.5
3
3.5
4
4.5
5
IDTQS3VH2245
2.5V / 3.3V 8-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
—
1
3
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 See Typical ICCD vs Enable Frequency graph below
(4)
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 ∆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.
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
IDTQS3VH2245
2.5V / 3.3V 8-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
fOE
Parameter
Data Propagation Delay(2,3)
Ax to/from Bx
Switch Turn-On Delay
OE to Ax/Bx
Switch Turn-Off Delay
OE to Ax/Bx
Operating Frequency - Enable, Select(2,5)
VCC = 3.3 ± 0.3V (1)
Min. (4)

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 OE control input (pass voltage > VCC, VIN = 5V, RLOAD ≥ 1MΩ, no CLOAD).
5
IDTQS3VH2245
2.5V / 3.3V 8-BIT 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
CHAR GE PUM P
D RIVER
SINGLE HOT
SW ITCH
Rail-to-Rail Switching
ZERO DO W N TIM E SYSTEM
PLUG GABLE C AR D / LIVE SYSTEM
CARD I/O
ON C ARD
LOGIC
CONN ECTOR
QS3VH XXX
CARD I/O
ON C ARD
LOGIC
CONN ECTOR
QS3VH XXX
CPU
R AM
BUS
Hot-Swapping
6
IDTQS3VH2245
2.5V / 3.3V 8-BIT 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
SAM E PHASE
INPUT TRANSITION
tPLH
t PHL
t PLH
tPHL
OUTPUT
V IH
VT
0V
V OH
VT
V OL
V IH
VT
0V
O PPOSITE PHASE
INPUT TRANSITION
Propagation Delay
V LOAD
V CC
500 Ω
(1, 2)
Pulse
Generator
V IN
CONTRO L
INPUT
G ND
t PZL
V OUT
D.U.T.
RT
DISABLE
ENABLE
Open
OUTPUT
SW ITCH
NORMALLY
CLO SED
LOW
tPZ H
OUTPUT SW ITCH
NORMALLY
OPEN
HIGH
500 Ω
CL
tPLZ
V IH
VT
0V
V LOAD/2
V LO A D /2
VT
VOL
VOL
t PHZ
+
V LZ
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
IDTQS3VH2245
2.5V / 3.3V 8-BIT HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
IDTQS
XXXXX
Device Type
XX
Package
Q
PA
Quarter Size Outline Package
Thin Shrink Small Outline Package
3VH2245
2.5V / 3.3V 8-Bit High Bandwidth Bus Switch
DATA SHEET DOCUMENT HISTORY
8/6/2002
Updated according to PCN Logic-0206-11
3/3/2003
Changed Icc limits
CORPORATE HEADQUARTERS
2975 Stender Way
Santa Clara, CA 95054
for SALES:
800-345-7015 or 408-727-6116
fax: 408-492-8674
www.idt.com
8
for Tech Support:
[email protected]
(408) 654-6459
Similar pages