QS3800PA [IDT]
Bus Driver, CMOS, PDSO24;
| 型号： | QS3800PA |
| 厂家： | 
INTEGRATED DEVICE TECHNOLOGY |
| 描述： | Bus Driver, CMOS, PDSO24 驱动 光电二极管 逻辑集成电路 |
| 文件： | 总4页 (文件大小：62K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
QUICKSWITCH® PRODUCTS
HIGH-SPEED CMOS
QS3800
10-BIT QUICKSWITCH WITH
PRECHARGED OUTPUTS
FEATURES/BENEFITS
• 5Ω bidirectional switches connect inputs to outputs
• Zero propagation delay
• Undershoot clamp diodes on all switch and control pins
• Outputs precharge voltage to minimize signal distortion during
live insertion
• TTL-compatible input and output levels
• Zero ground bounce
• Available in 24-pin SOIC, QSOP and TSSOP
DESCRIPTION
The QS3800 is a 10-bit high-speed CMOS bus switch controlled by a
single enable (ON) input. When ON is LOW, the switch is on and port A is
connected to port B. When ON is HIGH, the switch between port A and port
B is open and port B is precharged to the Bias voltage. The low ON
resistance (5Ω) of the QS3800 allows inputs to be connected to outputs
without adding propagation delay and without generating additional noise.
The QS3800 also precharges the B port to a user-selectable bias voltage to
minimize live-insertion noise which is uselful in VME bus applications.
FUNCTIONAL BLOCK DIAGRAM
V BIAS
A0
B0
A9
B9
ON
JULY 1999
1
1999 Integrated Device Technology, Inc
DSC-XXXXXX
QS3800
IDT
PIN CONFIGURATION
PIN DESCRIPTION
(All Pins Top View)
Name
A0-A9
B0-B9
ON
I/O
I/O
I/O
I
Function
Bus A
SOIC, QSOP, TSSOP
Bus B
ON
A0
A1
A2
A3
A4
A5
A6
A7
A8
1
24
23
22
21
20
19
18
17
16
15
14
13
VCC
B0
Bus Switch Enable
Bias Voltage
2
V
I
BIAS
3
B
1
4
B2
B3
5
6
B
B
4
5
7
8
B6
FUNCTION TABLE
9
B7
ON
L
B0-B9
Function
Connect
10
11
12
B8
A9
B9
A0-A9
GND
V BIAS
H
V
Disconnect
BIAS
ABSOLUTE MAXIMUM RATINGS
Note: ABSOLUTE MAXIMUM CONTINUOUS
RATINGS are those values beyond which
damage to the device may occur. Exposure to
these conditions or conditions beyond those
indicated may adversely affect device
Supply Voltage to Ground .................................................................–0.5V to 7.0V
Bias Voltage Range, BIAS V .............................................................. –0.5V to V
CC
DC Input Voltage V ...............................................................–0.5V to V + 0.5V
IN
CC
AC Input Voltage (for a pulse width ≤ 20ns).................................................. –3.0V
DC Output Current Max. Sink Current/Pin ................................................... 128mA
Input Clamp Current .................................................................................... –50mA
Maximum Power Dissipation .................................................................... 0.5 watts
TSTG Storage Temperature .............................................................. –65° to 150°C
reliability. Functional operation under absolute-
maximum conditions is not implied.
CAPACITANCE
TA = 25°C, f = 1MHz, V = 0V
IN
QSOP, SOIC
and TSSOP
Pins
Control Inputs
Typ
Max
Unit
pF
3
5
QuickSwitch Channels
(Switch OFF)
5
7
pF
Note: Capacitance is characterized but not tested. For total capacitance
while the switch is ON, please see Section 1 under "input and switch
capacitance."
2
1999 Integrated Device Technology, Inc
DSC-XXXXXX
IDT
QS3800
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Commercial: TA = –40°C to 85°C, V = 5.0V ±10%
CC
Symbol Parameter
Input HIGH Voltage
Test Conditions
Min
Typ(1)
Max
Unit
V
Guaranteed Logic HIGH
for Control Inputs
2.0
—
—
V
IH
V
Input LOW Voltage
Guaranteed Logic LOW
for Control Inputs
—
—
0.8
V
IL
V
Bias Voltage
Bias Current
V
CC = 5V
1.3
—
—
V
V
BIAS
CC
IO
VCC = 4.5V, VBIAS = 2.4V, V = 0
0.25
—
mA
O
ON = High
0 ≤ V ≤ V
| I |
Input Leakage Current
(Control inputs)
—
—
1
µA
IN
IN
CC
| IOZ
|
Off-State Current (Hi-Z)
Switch ON Resistance(2)
0 ≤ VOUT ≤ V
—
—
—
5
1
7
µA
CC
RON
V
CC = Min., V = 0.0V
Ω
IN
ION = 30mA
RON
Switch ON Resistance(2)
V
CC = Min., V = 2.4V
—
10
15
Ω
IN
ION = 15 mA
Notes:
1. Typical values indicate VCC = 5.0V and TA = 25°C.
2. For a diagram explaining the procedure for RON measurement, please see Section1 under "DC Electrical Characteristics."
3. Max. value of RON guaranteed by characterization, but not production tested.
TYPICAL ON RESISTANCE VS VIN AT VCC = 5.0V
16
14
12
10
RON
(ohms)
8
6
4
2
0
1.5
2.0
2.5
3.0
3.5
1.0
0.0
0.5
VIN
(Volts)
3
1999 Integrated Device Technology, Inc
DSC-XXXXXX
QS3800
IDT
POWER SUPPLY CHARACTERISTICS OVER OPERATING RANGE
TA = –40°C to 85°C, V = 5.0V ±10%
CC
Symbol Parameter
Test Conditions(1)
Typ(2)
Max
Unit
ICCQ
∆ICC
QCCD
Quiescent Power
Supply Current
V = Max., V = GND or V , f = 0
0.2
3.0
µA
CC
IN
CC
(3)
Power Supply Current
per Input HIGH
V = Max., V = 3.4V , f = 0
—
—
2.5
mA
CC
IN
per Control Input
Dynamic Power Supply
Current per MHz(4)
V = Max., A and B Pins Open,
0.25
mA/
MHz
CC
Data Inputs = GND, Control Inputs
Toggling @ 50% Duty Cycle
Notes:
1. For conditions shown as Min. or Max., use the appropriate values specified under DC specifications.
2. Typical Values are at VCC = 5.0V, 25°C Ambient.
3. Per TTL driven input (V = 3.4V, control inputs only). A and B pins do not contribute to ∆ICC
.
IN
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 by design, but not tested.
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
Commercial: TA = –40°C to 85°C, VCC = 5.0V ±10%
CLOAD = 50pF, RLOAD = 500Ω unless otherwise noted.
Symbol
Description(1)
Test Conditions
Min
Typ
Max
Unit
(2,3)
tPLH
tPHL
Data Propagation Delay
A to B or B to A
—
0.25(3)
—
ns
tPZL
tPZH
tPLZ
tPHZ
Switch Turn-on Delay
V
BIAS = 3V,
BIAS = GND
BIAS = 3V,
BAIS = GND
1.5
1.5
—
—
7.5
6.5
ns
ns
ON to A or B
V
(2)
Switch Turn-off Delay
V
ON to A or B
V
Notes:
1. See Test Circuit and Waveforms. Minimums guaranteed but not tested.
2. This parameter is guaranteed by design but not 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 0.25ns for 50pF. Since this time constant is much smaller than the rise/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.
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 is a registered trademark of Integrated Device Technology, Inc.
4
1999 Integrated Device Technology, Inc
DSC-XXXXXX
相关型号：
©2020 ICPDF网 联系我们和版权申明