IDT IDTQS32X2861 Quickswitch products high-speed cmos 20-bit bus switch with flow-thru pinout Datasheet

IDTQS32X2861
HIGH-SPEED CMOS 20-BIT BUS SWITCH WITH FLOW-THROUGH PINOUT
INDUSTRIAL TEMPERATURE RANGE
QUICKSWITCH® PRODUCTS
HIGH-SPEED CMOS
20-BIT BUS SWITCH
WITH FLOW-THRU PINOUT
IDTQS32X2861
FEATURES:
DESCRIPTION:
•
•
•
•
The QS32X2861 provides two sets of ten high-speed CMOS TTLcompatible bus switches. The low ON resistance of the QS32X2861 allows
inputs to be connected to outputs without adding propagation delay and
without generating additional ground bounce noise. The QS32x2861 adds
an internal 25Ω series termination resistor to each switch to reduce
reflection noise in high-speed applications. The Bus Enable (BEn) signals
turn the switches on.
The QS32X2861 bus switch is ideal for switching digital buses, as well
as for hotplug buffering and 5V to 3V conversion.
The QS32X2861 is characterized for operation at -40°C to +85°C.
Enhanced N channel FET with no inherent diode to Vcc
Ω series resistors for low noise
25Ω
Undershoot clamp diodes on all switch and control inputs
Available in 48-pin QVSOP package
APPLICATIONS:
•
•
•
•
•
•
Hot-swapping, hot-docking
Voltage translation (5V to 3.3V)
Power conservation
Capacitance reduction and isolation
Bus isolation
Clock gating
FUNCTIONAL BLOCK DIAGRAM
A0
B0
A9
B9
BE 1
A 10
B 10
A 19
B 19
BE 2
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
MARCH 2002
1
c
2002 Integrated Device Technology, Inc.
DSC-5727/2
IDTQS32X2861
HIGH-SPEED CMOS 20-BIT BUS SWITCH WITH FLOW-THROUGH PINOUT
PIN CONFIGURATION
INDUSTRIAL TEMPERATURE RANGE
ABSOLUTE MAXIMUM RATINGS(1)
Symbol
Description
Max
Unit
VTERM(2)
Supply Voltage to Ground
–0.5 to +7
V
VTERM(3)
DC Switch Voltage Vs
–0.5 to +7
V
VTERM(3)
DC Input Voltage VIN
–0.5 to +7
V
NC
1
48
VCC
A0
2
47
BE1
A1
3
46
B0
VAC
AC Input Voltage (pulse width ≤ 20ns)
–3
V
A2
4
45
B1
IOUT
DC Output Current
120
mA
A3
5
44
B2
PMAX
Maximum Power Dissipation (TA = 85°C)
0.5
W
A4
6
43
B3
TSTG
Storage Temperature
–65 to +150
°C
A5
7
42
B4
A6
8
41
B5
A7
9
40
B6
A8
10
39
B7
A9
11
38
B8
GND
12
37
B9
NOTE:
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.
NC
13
36
VCC
A10
14
35
BE2
A11
15
34
B10
A12
16
33
B11
CAPACITANCE
A13
17
32
B12
(TA = +25°C, f = 1.0MHZ, VIN = 0V, VOUT = 0V)
A14
18
31
B13
A15
19
30
B14
A16
20
29
B15
A17
21
28
B16
A18
22
27
B17
A19
23
26
B18
GND
24
25
B19
QVSOP
TOP VIEW
Pins
Typ.
Max.(1)
Unit
Control Pins
3
5
pF
5
7
pF
Quickswitch Channels (Switch OFF)
NOTE:
1. This parameter is measured at characterization but not tested.
PIN DESCRIPTION
Pin Names
I/O
Description
A0 - A19
I/O
Bus A
B0 - B19
I/O
Bus B
BEn
I
Bus Enable
FUNCTION TABLE(1)
BE1
BE2
A 0 - A9
A10 - A19
Function
L
L
B0 - B9
B10 - B19
Connect
L
H
B0 - B9
Z
Connect
H
L
Z
B10 - B19
Connect
H
H
Z
Z
Disconnect
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
Z = High-Impedance
2
IDTQS32X2861
HIGH-SPEED CMOS 20-BIT BUS SWITCH WITH FLOW-THROUGH PINOUT
INDUSTRIAL TEMPERATURE RANGE
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Industrial: TA = –40°C to +85°C, VCC = 5.0V ±5%
Symbol
Parameter
Test Conditions
VIH
Input HIGH Level
Guaranteed Logic HIGH for Control Pins
VIL
Input LOW Level
Guaranteed Logic LOW for Control Pins
IIN
Input LeakageCurrent (Control Inputs)(2) 0V ≤ VIN ≤ VCC
IOZ
Off-State Output Current (Hi-Z)
Switch ON Resistance
RON(3)
VP
Pass Voltage(2)
Min.
Typ.(1)
Max.
Unit
2
—
—
V
—
—
0.8
V
—
±0.01
±1
µA
0V ≤ VOUT ≤ VCC, Switches OFF
—
±0.01
±1
µA
VCC = Min., VIN = 0V, ION = 30mA
VCC = Min., VIN = 2.4V, ION =15mA
VIN = VCC = 5V, IOUT = -5µA
15
18
3.7
20
25
4
35
40
4.2
Ω
NOTES:
1. Typical values are at VCC = 5.0V, TA = 25°C.
2. Pass Voltage is guaranteed but not production tested.
3. ROUT changed on March 8, 2002. See rear page for more information.
TYPICAL ON RESISTANCE vs VIN AT VCC = 5V
80
R ON
(ohms)
70
60
50
40
30
20
10
0
0.0
0.5
1.0
1.5
2.0
V IN
(Volts)
3
2.5
3.0
3.5
V
IDTQS32X2861
HIGH-SPEED CMOS 20-BIT BUS SWITCH WITH FLOW-THROUGH PINOUT
INDUSTRIAL TEMPERATURE RANGE
POWER SUPPLY CHARACTERISTICS
Symbol
Test Conditions(1)
Parameter
Typ(2)
Max.
Unit
ICCQ
Quiescent Power Supply Current
VCC = Max., VIN = GND or Vcc, f = 0
0.2
6
µA
∆ICC
Power Supply Current per Control Input HIGH(3)
VCC = Max., VIN = 3.4V, f = 0
—
2.5
mA
ICCD
Dynamic Power Supply Current per MHz(4)
VCC = Max., A and B pins open
—
0.25
mA/MHz
BEn Control Input Toggling at 50% Duty Cycle
NOTES:
1. For conditions shown as Min. or Max., use the appropriate values specified under DC Electrical Characteristics.
2. Typical values are at VCC = 5.0V, 25°C ambient.
3. Per TLL driven input (VIN = 3.4V, control inputs only). A and B pins do not contribute to ∆Icc.
4. This current applies to the control inputs only and represents the current required to switch internal capacitance at the specified frequency. The A and B pins generate no significant
AC or DC currents as they transition. This parameter is guaranteed but not production tested.
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
TA = -40°C to +85°C, VCC = 5.0V ± 5%;
CLOAD = 50pF, RLOAD = 500Ω unless otherwise noted.
Symbol
Parameter
tPLH
Data Propagation Delay (2,3)
tPHL
An to/from Bn
tPZH
Switch Turn-on Delay
tPZL
BEn to An/Bn
tPHZ
Switch Turn-off Delay (2)
tPLZ
BEn to An/Bn
Min. (1)
Typ.
Max.
Unit
—
1.25
—
ns
1.5
—
7.5
ns
1.5
—
6.5
ns
NOTES:
1. Minimums are guaranteed but not production tested.
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 1.25ns for 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
IDTQS32X2861
HIGH-SPEED CMOS 20-BIT BUS SWITCH WITH FLOW-THROUGH PINOUT
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
IDTQS XXXXX
Device Type
XX
Package
X
Process
Blank
Industrial (-40°C to +85°C)
Q1
48-Pin QVSOP
32X2861
High Speed CMOS 20-Bit Bus Switch
with Flow-Through Pinout
As per PCN L0201-02, the Output Resistance (RON) specifications have changed as of March 8, 2002. The original specifications were:
Parameter
RON
Description
Min.
Typ.
Max.
Unit
Ω
VCC = Min, VIN = 0V, ION = 30mA
—
28
35
VCC = Min, VIN = 2.4V, ION = 15mA
—
35
40
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
5
for Tech Support:
[email protected]
(408) 654-6459
Similar pages