QS3800Q [IDT]
Bus Driver, 3800 Series, 1-Func, 10-Bit, True Output, CMOS, PDSO24;
| 型号： | QS3800Q |
| 厂家： | 
INTEGRATED DEVICE TECHNOLOGY |
| 描述： | Bus Driver, 3800 Series, 1-Func, 10-Bit, True Output, CMOS, PDSO24 驱动 光电二极管 逻辑集成电路 |
| 文件： | 总5页 (文件大小：71K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
QUICKSWITCH® PRODUCTS
HIGH-SPEED CMOS
IDTQS3800
10-BIT QUICKSWITCH WITH
PRECHARGED OUTPUTS
DESCRIPTION
FEATURES:
−
−
−
−
5Ω bidirectional switches connect inputs to outputs
Zero propagation delay, zero ground bounce
Undershoot clamp diodes on all switch and control inputs
Outputs precharge voltage to minimize signal distortion during live
insertion
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
connectedtoportB.WhenON is high,the switchbetweenportAandport
BisopenandportBisprechargedtotheBiasvoltage.ThelowONresistance
(5Ω)oftheQS3800allowsinputstobeconnectedtooutputswithoutadding
propagation delay and without generating additional noise. The QS3800
alsoprechargestheBporttoauser-selectablebiasvoltagetominimizelive-
insertionnoise whichis uselfulinVMEbus applications.
−
−
TTL-compatible input and output levels
Available in QSOP, SOIC, and TSSOP Packages
The QS3800 is characterized for operation at -40°C to +85°C.
FUNCTIONALBLOCKDIAGRAM
V BIAS
A0
B0
A9
B9
ON
INDUSTRIAL TEMPERATURE RANGE
MAY 2000
1
c
1999 Integrated Device Technology, Inc.
DSC-5766/-
IDTQS3800
HIGH-SPEEDCMOS10-BITQUICKSWITCHWITHPRECHARGEDOUTPUTS
INDUSTRIALTEMPERATURERANGE
ABSOLUTE MAXIMUM RATINGS (1)
PINCONFIGURATION
Symbol
Description
Max.
Unit
(2)
Supply Voltage to Ground
– 0.5 to +7
V
VTERM
VBIAS
Bias Voltage Range
DC Input Voltage VIN
– 0.5 to Vcc
V
V
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
(3)
– 0.5 to
Vcc + 0.5
-3
VTERM
2
VAC
AC Input Voltage (pulse width ≤20ns)
DC Output Current
V
3
B1
IOUT
120
-50
0.5
mA
mA
W
4
B2
Input Clamp Current
5
B3
PMAX
TSTG
Maximum Power Dissipation (TA = 85°C)
Storage Temperature
SO24-2
SO24-8
SO24-9
– 65 to +150 °C
6
B4
NOTES:
7
B5
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.
8
B6
9
B7
10
11
12
B8
3. All terminals except Vcc.
A9
B9
GND
VBIAS
CAPACITANCE
(TA = +25OC, f = 1.0MHz, VIN = 0V, VOUT = 0V)
SOIC/ QSOP/ TSSOP
TOP VIEW
Pins
Typ.
Max. (1)
Unit
Control Pins
3
5
pF
Quickswitch Channels (Switch OFF)
5
7
pF
NOTE:
1. This parameter is guaranteed but not production tested.
PIN DESCRIPTION
Pin Names
I/O
Description
A0 - A9
I/O
Bus A
Bus B
B0 - B9
ON
I/O
I
Bus Switch Enable
Bias Voltage
VBIAS
I
FUNCTION TABLE (1)
B 0 - B9
ON
Function
L
A0 - A9
VBIAS
Connect
H
Disconnect
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
2
IDTQS3800
HIGH-SPEEDCMOS10-BITQUICKSWITCHWITHPRECHARGEDOUTPUTS
INDUSTRIALTEMPERATURERANGE
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Industrial: TA = -40°C to +85°C, VCC = 5.0V ± 10%
Symbol
Parameter
Input HIGH Voltage
Test Conditions
Min. Typ.(1) Max.
Unit
VIH
Guaranteed Logic HIGH for Control Pins
2
—
—
—
—
—
—
—
5
—
0.8
Vcc
—
±1
±1
7
V
VIL
Input LOW Voltage
Guaranteed Logic LOW for Control Pins
Vcc = 5V
V
V
VBIAS
IO
Bias Voltage
1.3
0.25
—
Bias Current
Vcc = 4.5V, VBIAS = 2.4V, VO = 0, ON = HIGH
0V ≤ VIN ≤ Vcc
mA
µA
µA
Ω
IIN
Input Leakage Current (Control Inputs)
Off-State Current (Hi-Z)
Switch ON Resistance
Switch ON Resistance
IOZ
0V ≤ VOUT ≤ Vcc
—
RON
RON
Vcc = Min., VIN = 0V, ION = 30mA
Vcc = Min., VIN = 2.4V, ION = 15mA
—
—
10
15
Ω
NOTE:
1. Typical values are at VCC = 5.0V, TA = 25°C.
TYPICAL ON RESISTANCE vs VIN AT VCC = 5V
16
14
12
RON
(ohms)
10
8
6
4
2
0
1.5
2.0
2.5
3.0
3.5
1.0
0.0
0.5
VIN
(Volts)
3
IDTQS3800
HIGH-SPEEDCMOS10-BITQUICKSWITCHWITHPRECHARGEDOUTPUTS
INDUSTRIALTEMPERATURERANGE
POWER SUPPLY CHARACTERISTICS
Symbol
Parameter
Test Conditions(1)
VCC = Max., VIN = GND or Vcc, f = 0
(3)
Typ. (2)
Max.
Unit
ICCQ
Quiescent Power Supply Current
0.2
3
µA
∆ICC
Power Supply Current per Control Input HIGH
Dynamic Power Supply Current per MHz(4)
V
CC = Max., V = 3.4V , f = 0
—
—
2.5
mA
IN
ICCD
VCC = Max., A and B pins open,
Data Inputs = GND
0.25
mA/MHz
Control Inputs 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 inputs 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 ± 10%
Ω
CLOAD = 50pF, RLOAD = 500 unless otherwise noted.
Test Conditions
Min. (1)
Typ.
Max.
Symbol
tPLH
Parameter
Data Propagation Delay (1,2)
A to B or B to A
Unit
—
0.25
—
ns
tPHL
VBIAS = 3V,
VBIAS = GND
tPZL
Switch Turn-on Delay
ON to A or B
Switch Turn-off Delay (1)
ON to A or B
1.5
1.5
—
—
7.5
6.5
ns
ns
tPZH
VBIAS = 3V,
VBIAS = GND
tPLZ
tPHZ
NOTES:
1. This parameter is guaranteed but not production tested.
2. 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 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
IDTQS3800
HIGH-SPEEDCMOS10-BITQUICKSWITCHWITHPRECHARGEDOUTPUTS
INDUSTRIALTEMPERATURERANGE
ORDERINGINFORMATION
XX
IDTQS
XXXXX
X
Package
Process
Device Type
Industrial (-40°C to +85°C)
Blank
SO
Q
PA
Small Outline IC (SO24-2)
Quarter-Size Outline Package (SO24-8)
Thin Shrink Small Outline Package (SO24-9)
High Speed CMOS 10-Bit QuickSwitch with
Precharged Outputs
3800
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