FSTU32X384QSPX [FAIRCHILD]
Bus Driver, CBT/FST/QS/5C/B Series, 4-Func, 10-Bit, True Output, CMOS, PDSO48, 0.150 INCH, MO-154, QVSOP-48;
| 型号： | FSTU32X384QSPX |
| 厂家： | 
FAIRCHILD SEMICONDUCTOR |
| 描述： | Bus Driver, CBT/FST/QS/5C/B Series, 4-Func, 10-Bit, True Output, CMOS, PDSO48, 0.150 INCH, MO-154, QVSOP-48 驱动 光电二极管 逻辑集成电路 |
| 文件： | 总6页 (文件大小：239K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
May 2002
Revised June 2002
FSTU32X384
20-Bit Low Power Bus Switch
with −2V Undershoot Protection
General Description
Features
■ 4Ω switch connection between two ports
The Fairchild Switch FSTU32X384 provides 20 bits of high-
speed CMOS TTL-compatible bus switches. The low On
Resistance of the switch allows inputs to be connected to
outputs without adding propagation delay or generating
additional ground bounce noise. The device is organized
as four 5-bit switches with separate bus enable (OE) sig-
nals. When OE is LOW, the switch is ON and Port A is con-
nected to Port B. When OE is HIGH, the switch is OPEN
and a high-impedance state exists between the two ports.
■ Minimal propagation delay through the switch
■ Ultra low power with < 0.1 µA typical ICC
■ Zero ground bounce in flow-through mode
■ Control inputs compatible with TTL level
■ See Application Note AN-5008 for details on
FSTU - Undershoot Protected Fairchild Switch Family
The A and B Ports are protected against undershoot to
support an extended range to 2.0V below ground.
Fairchild’s integrated Undershoot Hardened Circuit
(UHC ) senses undershoot at the I/O and responds by
preventing voltage differentials from developing and turn-
ing the switch on.
Ordering Code:
Package
Order Number
Package Description
Number
FSTU32X384QSP
MQA48A 48-Lead Quarter Size Very Small Outline Package (QVSOP), JEDEC MO-154, 0.150" Wide
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Logic Diagram
UHC is a trademark of Fairchild Semiconductor Corporation.
© 2002 Fairchild Semiconductor Corporation
DS500705
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Pin Descriptions
Connection Diagram
Pin Names
Description
OEX
A
Bus Switch Enable
Bus A
B
Bus B
Truth Table
Inputs
Inputs/Outputs
OEX
L
A, B
A = B
Z
H
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2
Absolute Maximum Ratings(Note 1)
Recommended Operating
Conditions (Note 3)
Supply Voltage (VCC
)
−0.5V to +7.0V
−0.5V to +7.0V
−0.5V to +7.0V
−50 mA
DC Switch Voltage (VS)
Power Supply Operating (VCC
Input Voltage (VIN
Output Voltage (VOUT
)
4.0V to 5.5V
0V to 5.5V
0V to 5.5V
DC Input Voltage (VIN) (Note 2)
DC Input Diode Current (IIK) VIN < 0V
DC Output (IOUT) Sink Current
)
)
128 mA
Input Rise and Fall Time (tr, tf)
Switch Control Input
DC VCC/GND Current (ICC/IGND
)
± 100 mA
0 ns/V to 5 ns/V
0 ns/V to DC
Storage Temperature Range (TSTG
)
−65°C to +150°C
Switch I/O
Free Air Operating Temperature (TA)
−40°C to +85°C
Note 1: The “Absolute Maximum Ratings” are those values beyond which
the safety of the device cannot be guaranteed. The device should not be
operated at these limits. The parametric values defined in the “Electrical
Characteristics” table are not guaranteed at the absolute maximum ratings.
The “Recommended Operating Conditions” table will define the conditions
for actual device operation.
Note 2: The input and output negative voltage ratings may be exceeded if
the input and output diode current ratings are observed.
Note 3: Unused control inputs must be held HIGH or LOW. They may not
float.
DC Electrical Characteristics
T
A = −40°C to +85°C
VCC
(V)
Symbol
Parameter
Units
Condition
Min
Typ
Max
(Note 4)
VIK
Clamp Diode Voltage
4.5
4.0 - 5.5
4.0 - 5.5
5.5
−1.2
V
V
V
IIN= − 18mA
VIH
VIL
II
HIGH Level Input Voltage
LOW Level Input Voltage
Input Leakage Current
2.0
0.8
±1.0
10
±1.0
7
0 ≤ VIN ≤ 5.5V
IN = 5.5V
0 ≤ A, B ≤ VCC
µA
µA
0
V
IOZ
OFF-STATE Leakage Current
Switch On Resistance
(Note 5)
5.5
RON
4.5
4
4
V
V
V
V
V
IN = 0V, IIN = 64 mA
4.5
7
IN = 0V, IIN = 30 mA
Ω
4.5
8
15
20
3
IN = 2.4V, IIN = 15 mA
IN = 2.4V, IIN = 15 mA
IN = VCC or GND, IOUT = 0
4.0
11
ICC
Quiescent Supply Current (Note 6)
Increase in ICC per Input
(Note 7)
5.5
µA
∆ ICC
5.5
2.5
mA
One Input at 3.4V
Other Inputs at VCC or GND
0.0 mA ≥ IIN ≥ 50 mA
OE = 5.5V
VIKU
Voltage Undershoot
5.5
−2.0
V
Note 4: All typical values are at VCC = 5.0V, TA = 25°C.
Note 5: Measured by voltage drop between A and B pin at indicated current through the switch. On Resistance is determined by the lower of the voltages on
the two (A or B) pins.
Note 6: Per VCC pin.
Note 7: Per TTL driven input, control pins only.
3
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AC Electrical Characteristics
T
A = −40°C to +85°C
L = 50 pF, RU = RD = 500Ω
CC = 4.0V
C
Figure
Number
Symbol
Parameter
Units
Conditions
V
CC = 4.5 − 5.5V
V
Min
Max
Min
Max
tPHL, tPLH
tPZH, tPZL
Propagation Delay Bus to Bus
(Note 8)
Figures
2, 3
0.25
0.25
ns
ns
VI = OPEN
Output Enable Time
OE1, OE2 to An, Bn
Output Disable Time
OE1, OE2 to An, Bn
VI = 7V for tPZL
Figures
2, 3
1.0
1.5
5.7
5.2
6.2
5.5
VI = OPEN for tPZH
II = 7V for tPLZ
tPHZ, tPLZ
Figures
2, 3
ns
VI = OPEN for tPHZ
Note 8: This parameter is guaranteed by design but not tested. The bus switch contributes no propagation delay other than the RC delay of the typical On
Resistance of the switch and the 50pF load capacitance, when driven by an ideal voltage the source (zero output impedance).
Capacitance (Note 9)
Symbol
CIN
CI/O (OFF)
Parameter
Control Input Capacitance
Input/Output Capacitance
Typ
Max
Units
Conditions
CC = 5.0V
3
6
pF
V
5
13
pF
VCC, OE = 5.0V
Note 9: Capacitance is characterized but not tested.
Undershoot Characteristic (Note 10)
Symbol
Parameter
Min
2.5
Typ
VOH - 0.3
Max
Units
Conditions
VOUTU
Output Voltage During Undershoot
V
Figure 1
Note 10: This test is intended to characterize the device’s protective capabilities by maintaining output signal integrity during an input transient voltage
undershoot event.
FIGURE 1.
Device Test Conditions
Transient
Input Voltage (V ) Waveform
IN
Parameter
Value
see Waveform
100K
Units
VIN
V
Ω
V
V
R
1 = R2
VTRI
11.0
VCC
5.5
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4
AC Loading and Waveforms
FSTU32X384 VIN vs. RON (Typ)
Note: Input driven by 50 Ω source terminated in 50 Ω
Note: CL includes load and stray capacitance
Note: Input PRR = 1.0 MHz, tW = 500 ns
FIGURE 2. AC Test Circuit
FIGURE 3. AC Waveforms
5
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Physical Dimensions inches (millimeters) unless otherwise noted
48-Lead Quarter Size Very Small Outline Package (QVSOP), JEDEC MO-154, 0.150" Wide
Package Number MQA48A
Technology Description
The Fairchild Switch family derives from and embodies Fairchild’s proven switch technology used for several years in its
74LVX3L384 (FSTU32X384) bus switch product.
Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and
Fairchild reserves the right at any time without notice to change said circuitry and specifications.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD
SEMICONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the
body, or (b) support or sustain life, and (c) whose failure
to perform when properly used in accordance with
instructions for use provided in the labeling, can be rea-
sonably expected to result in a significant injury to the
user.
2. A critical component in any component of a life support
device or system whose failure to perform can be rea-
sonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
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6
相关型号：
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Bus Driver, CBT/FST/QS/5C/B Series, 2-Func, 10-Bit, True Output, CMOS, PDSO48, 0.150 INCH, MO-154, QVSOP-48
FAIRCHILD
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