HIGH-SPEED CMOS 20-BIT LOW RESISTANCE, ACTIVE HIGH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
QUICKSWITCH
®
PRODUCTS
IDTQS32XR862
HIGH-SPEED CMOS 20-BIT LOW
RESISTANCE, ACTIVE HIGH BUS SWITCH
WITH FLOW-THROUGH PINOUT
FEATURES:
−
−
−
−
−
−
Enhanced N channel FET with no inherent diode to Vcc
2.5Ω bidirectional switches connect inputs to outputs
Zero propagation delay, zero ground bounce
Undershoot clamp diodes on all switch and control pins
Active Low and High enable controls
Available in 48-pin QVSOP Package
DESCRIPTION:
The QS32XR862 provides two sets of ten high-speed CMOS, TTL-
compatible, active high, low resistance bus switches. The very low ON
resistance (2.5Ω) of the QS32XR862 allows inputs to be connected to
outputs without adding propagation delay and without generating additional
ground bounce noise. The switches are controlled by independent active
Low Enable (BE) and active High Enable (BE) controls for each set.
The QS32XR862 is ideal for switching digital buses as well as for hot plug
buffering and 5V to 3.3V conversion. The low ON resistance of the
QS32XR862 makes it ideal for PCI hot -docking applications.
The QS32XR862 is characterized for operation at -40°C to +85°C.
APPLICATIONS
−
−
−
−
−
−
−
Hot-swapping and hot-docking (low R
ON
resistance for PCI and
Compact PCI applications)
Voltage translation (5V to 3.3V)
Power conservation
Capacitance reduction and isolation
Applications requiring Low resistance and active High enabling
Bus isolation
Clock gating
FUNCTIONAL BLOCK DIAGRAM
A
0
B
0
A
9
B
9
BE
1
BE
1
A
10
B
10
A
19
B
19
BE
2
BE
2
INDUSTRIAL TEMPERATURE RANGE
1
c
1999 Integrated Device Technology, Inc.
NOVEMBER 1999
DSC-5540/-
IDTQS32XR862
HIGH-SPEED CMOS 20-BIT LOW RESISTANCE, ACTIVE HIGH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
(1)
Unit
V
V
V
V
mA
W
°C
PIN CONFIGURATION
BE
1
A
0
A
1
A
2
A
3
A
4
A
5
A
6
A
7
A
8
A
9
GND
BE
2
A
10
A
11
A
12
A
13
A
14
A
15
A
16
A
17
A
18
A
19
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
Vcc
BE
1
B
0
B
1
B
2
B
3
B
4
B
5
B
6
B
7
B
8
B
9
Vcc
BE
2
B
10
B
11
B
12
B
13
B
14
B
15
B
16
B
17
B
18
B
19
ABSOLUTE MAXIMUM RATINGS
Symbol
V
TERM(2)
V
TERM(3)
V
TERM(3)
V
AC
I
OUT
P
MAX
T
STG
Description
Supply Voltage to Ground
DC Switch Voltage V
S
DC Input Voltage V
IN
AC Input Voltage (pulse width
≤20ns)
DC Output Current
Maximum Power Dissipation
Storage Temperature
Max.
– 0.5 to +7
– 0.5 to +7
– 0.5 to +7
-3
120
.5
– 65 to +150
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
(T
A
= +25
O
C, f = 1.0MHz, V
IN
= 0V, V
OUT
= 0V)
Pins
Control Inputs
Quickswitch Channels (Switch OFF)
Typ.
3
5
Max.
(1)
4
6
Unit
pF
pF
NOTE:
1. This parameter is guaranteed but not production tested.
PIN DESCRIPTION
Pin Names
BE
BE
A
0
- A
19
B
0
- B
19
I/O
I
I
I/O
I/O
Description
Active LOW Bus Enable
Active HIGH Bus Enable
Bus A
Bus B
FUNCTION TABLE
(1)
BE
1
L
L
H
H
BE
2
L
L
H
BE
1
L
H
L
H
BE
2
L
H
L
H
A
0
- A
9
Hi-Z
Hi-Z
B
0
- B
9
Hi-Z
A
10
- A
19
Hi-Z
Hi-Z
B
10
- B
19
Hi-Z
Disconnect
Disconnect
Connect
Disconnect
Disconnect
Disconnect
Connect
Disconnect
Function
Function
QVSOP
TOP VIEW
H
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
Z = High-Impedence
2
IDTQS32XR862
HIGH-SPEED CMOS 20-BIT LOW RESISTANCE, ACTIVE HIGH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Industrial: T
A
= -40°C to +85°C, V
CC
= 5.0V ± 10%
Symbol
V
IH
V
IL
I
IN
I
OZ
R
ON
R
ON
V
P
Parameter
Input HIGH Voltage
Input LOW Voltage
Input Leakage Current (Control Inputs)
Off-State Current (Hi-Z)
Switch ON Resistance
Switch ON Resistance
Pass Voltage
(2)
Test Conditions
Guaranteed Logic HIGH for Control Pins
Guaranteed Logic LOW for Control Pins
0V
≤
BEn,
BEn
≤
Vcc
0V
≤
V
OUT
≤
Vcc, Switches OFF
Vcc = Min., V
IN
= 0V, I
ON
= 30mA
Vcc = Min., V
IN
= 2.4V, I
ON
= 15mA
V
IN
= Vcc = 5V, I
OUT
= -5µA
Min.
2
—
—
—
—
—
3.7
Typ.
(1)
—
—
±0.01
±0.01
2.5
4
4
Max.
—
0.8
±1
±1
5
8.5
4.3
Unit
V
V
µA
µA
Ω
Ω
V
NOTES:
1. Typical values are at V
CC
= 5.0V, T
A
= 25°C.
2. Pass voltage is guaranteed but not production tested.
TYPICAL ON RESISTANCE vs V
IN
AT V
CC
= 5V
R
ON
(ohms)
16
14
12
10
8
6
4
2
0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
V
IN
(Volts)
3
IDTQS32XR862
HIGH-SPEED CMOS 20-BIT LOW RESISTANCE, ACTIVE HIGH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
POWER SUPPLY CHARACTERISTICS
Symbol
I
CCQ
∆I
CC
I
CCD
Parameter
Quiescent Power Supply Current
Power Supply Current per Control Input HIGH
(3)
Dynamic Power Supply Current per MHz
(4)
Test Conditions
(1)
V
CC
= Max., BEn = GND or Vcc, f = 0
V
CC
= Max., V
IN
= 3.4V, f = 0
V
CC
= Max., A and B pins open
Control Inputs Toggling at 50% Duty Cycle
Typ.
(2)
0.2
—
—
Max.
6
2.5
0.25
Unit
µA
mA
mA/MHz
NOTES:
1. For conditions shown as Min. or Max., use the appropriate values specified under DC Electrical Characteristics.
2. Typical values are at V
CC
= 5.0V, T
A
= 25°C.
3. Per TLL driven input (V
IN
= 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 inputs generate no significant AC or DC currents as they transition. This parameter is guaranteed but not production tested.
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
T
A
= -40°C to +85°C, V
CC
= 5.0V ± 10%
C
LOAD
= 50pF, R
LOAD
= 500Ω unless otherwise noted.
Symbol
t
PLH
t
PHL
t
PZL
t
PZH
t
PLZ
t
PHZ
Parameter
Data Propagation Delay
(2,3)
An to/from Bn
Switch Turn-on Delay
BEn
or BEn to An/Bn
Switch Turn-off Delay
(2)
BEn to An/Bn
Min.
(1)
—
1.5
1.5
Typ.
—
—
—
Max.
0.12
5.6
4.5
Unit
ns
ns
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 0.12ns for 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
IDTQS32XR862
HIGH-SPEED CMOS 20-BIT LOW RESISTANCE, ACTIVE HIGH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
IDTQS
XXXXX
Device Type
XX
Package
X
Process
Blank
Industrial (-40°C to +85°C)
Q1
QVSOP
32XR862
High Speed CMOS 20-Bit Low Resistance, Active High
Bus Switch with Flow-Through Pinout
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*
*To search for sales office near you, please click the sales button found on our home page or dial the 800# above and press 2.
The IDT logo, QuickSwitch, and SynchroSwitch are registered trademarks of Integrated Device Technology, Inc.
Invited by GuaGua, I am going to choose a good day to start a blog. I will post something today to advertise. I mainly work on 51, MSP430 microcontrollers, ARM, CPLD, and DSP. My works are all origina...
In the system I am working on, there are some parameters that need to be modified at any time when the program is running. After the modification, they must be saved and will not be lost when the powe...
Discussion on TI DSP application technology [Repost]
1. Clock and power supply Q: What aspects should be paid special attention to in the power supply design and clock design of DSP? Is it better to u...
I customized the ARM4VI simulator SDK with PB 5.0, and generated an MFC project with VS 2005. The following error occurred during linking. The Win32 process can be compiled, but cannot be debugged wit...
0. Introduction
In daily life, we often see some special-purpose vehicles. When these vehicles pass through intersections, they often obtain the right of way at intersections by temporarily op...[Details]
Analog engineers have traditionally struggled with complexity when designing power supplies that required multiple outputs, dynamic load sharing, hot-swap, or extensive fault-handling capabilities....[Details]
1 Introduction
With the acceleration of the pace of urban modernization, society has higher requirements for urban road lighting and urban lighting projects. The state has clearly required tha...[Details]
The reason for the light decay of white LEDs: the decline of phosphor performance
So far, the rapid decline of the luminous performance of white light LEDs, especially low-power white light LE...[Details]
In recent years, lighting has become an important area that countries around the world are targeting to promote energy conservation and environmental protection. According to statistics, about 20% ...[Details]
A multi-point temperature control heating control system was designed using the SST89E564RC single-chip microcomputer and a new temperature measuring device. The heating system can be controlled in...[Details]
my country is a big country in agriculture, grain production and consumption. Grains are a necessary condition for our nation to survive and develop. The flour processing industry will exist forever w...[Details]
This week, Microsoft held its 2012 Microsoft Worldwide Partner Conference (WPC) in Toronto, Canada. At the conference, Microsoft showed its new products and services to partners around the world. A...[Details]
This paper designs a 16x16LED Chinese character display bar based on single-chip dynamic scanning control, briefly analyzes the principle of Chinese character display, and studies how the LED displ...[Details]
Abstract: The output of high-range acceleration sensor is less than 10 mV under the excitation of small signal. The noise of traditional test system may cover such small voltage signal, so that hig...[Details]
0 Introduction
High-precision current source can provide high-precision current supply for precision instruments, and is suitable for automatic measurement tasks of various resistors in semico...[Details]
Liquid crystal display (LCD) panels have a wide range of applications, from small portable electronic devices to large fixed devices, including digital cameras, laptops, personal data assistants, d...[Details]
introduction
At present, measuring instruments are developing towards networking, and each individual embedded instrument will become a node on the Internet. This system realizes the network...[Details]
Analysis of the three core aspects of digital TV transmission standards
According to the differences in regionality, transmission method and modulation method, the transmission method needs to...[Details]
When the so-called "copycat phones" that flood the domestic mobile phone market move towards large screens, stereo amplifiers, touch controls, and even GPS navigation and mobile TV, the homogeneity...[Details]
Microcontroller MCU
京公网安备 11010802033920号
EEWORLD
