Fairchild FST3383QSC 10-bit low power bus-exchange switch Datasheet

Revised May 1999
FST3383
10-Bit Low Power Bus-Exchange Switch
General Description
Features
The FST3383 provides two sets of high-speed CMOS TTLcompatible 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 operates as a 10-bit bus switch
or a 5-bit bus exchanger. The bus exchange (BX) signal
provides nibble swapping of the AB and CD pairs of signals. This exchange configuration allows byte swapping of
buses in systems. It can also be used as a quad 2-to-1
multiplexer and to create low delay barrel shifters. The bus
enable (BE) signal turns the switches ON.
■ 5Ω switch connection between two ports
■ Zero propagation delay
■ Ultra low power with 0.2 µA typical ICC
■ Zero ground bounce in flow-through mode
■ Control inputs compatible with TTL level
Ordering Code:
Order Number
Package Number
Package Description
FST3383WM
M24B
24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
FST3383QSC
MQA24
24-Lead Quarter Size Outline Package (QSOP), JEDEC MO-137, 0.150 Wide
FST3383MTC
MTC24
24-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Diagram
Connection Diagram
Pin Descriptions
Truth Table
Pin Names
Description
BE BX
A0–A4
B0–B4
Function
BE
Bus Switch Enable
BX
Bus Exchange
L
L
C0–C4
D0 – D4
Connect
A0–A4, B0–B4
Buses A, B
L
H D0–D4
C0–C4
Exchange
C0–C4, D0–D4
Buses C, D
© 1999 Fairchild Semiconductor Corporation
DS011652.prf
H
X High-Z State High-Z State Disconnect
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FST3383 10-Bit Low Power Bus-Exchange Switch
December 1993
FST3383
Absolute Maximum Ratings(Note 1)
Supply Voltage (VCC )
−0.5V to +7.0V
DC Switch Voltage (VS)
−0.5V to +7.0V
DC Input Voltage (VI) (Note 2)
−0.5V to +7.0V
DC Input Diode Current (IIN)
with VI < 0
Supply Voltage (VCC)
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 tables are not guaranteed at the absolute maximum ratings.
The “Recommended Operating Conditions” table will define the conditions
for actual device operation.
120 mA
−65°C to +150°C
Power Dissipation
4.0V to 5.5V
−40°C to +85°C
Free Air Operating Temperature (TA)
−20 mA
DC Output (IO) Sink Current
Storage Temperature Range (TSTG)
Recommended Operating
Conditions
Note 2: The input and output negative voltage ratings may be exceeded if
the input and output diode current ratings are observed.
0.5W
DC Electrical Characteristics
Symbol
Parameter
VCC
(V)
TA = −40°C to +85°C
Min
Typ
Max
Units
−1.2
V
Conditions
(Note 3)
Maximum Clamp Diode Voltage
VIH
Minimum High Level Input Voltage
4.75–5.25
VIL
Maximum Low Level Input Voltage
4.75–5.25
0.8
V
IIN
Maximum Input
0
10
µA
0 ≤ VIN ≤ 5.25V
5.25
±1
µA
0 ≤ A, B ≤ VCC
Leakage Current
4.75
IIN = −18 mA
VIK
2.0
V
±10
IOZ
Maximum 3-STATE I/O Leakage
5.25
IOS
Short Circuit Current
4.75
RON
Switch On Resistance (Note 4)
4.75
5
7
10
ICC
Maximum Quiescent Supply Current
5.25
0.2
∆ICC
Increase in ICC per Input (Note 5)
5.25
100
mA
VI(A), VI(B) = 0V, VI(B), VI(A) = 4.75V
Ω
VI = 0V, ION = 30 mA
15
Ω
VI = 2.4V, ION = 15 mA
10
µA
VI = VCC, GND, IO = 0
2.5
mA
VIN = 3.15V, IO = 0, Per Control Input
Note 3: All typical values are at VCC = 5.0V, TA = 25°C.
Note 4: 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 5: Per TTL driven input (VIN = 3.15V, control inputs only). A and B pins do not contribute to ICC.
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2
Symbol
VCC
(V)
Parameter
TA = −40°C to +85°C, CL = 50 pF
Min
Typ
Max
Units
0.25
ns
(Note 6)
tPLH,
Data Propagation Delay
tPHL
An to Cn, Dn or Bn to Dn, Cn (Note 7)
tPLH,
Switch Exchange Time
tPHL
BX to An, Bn, Cn, Dn
tPZL,
Switch Enable Time
tPZH
BE to An, Bn, Cn or Dn
tPLZ,
Switch Disable Time
tPHZ
BE to An, Bn, Cn, or Dn
4.75
4.75
1.5
6.5
ns
4.75
1.5
6.5
ns
4.75
1.5
5.5
ns
Note 6: All typical values are at VCC = 5.0V, TA = 25°C.
Note 7: This parameter is guaranteed by design but not tested. 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 and alone is of the order of 0.25 ns for 50 pF load. 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.
Capacitance (Note 8)
Typ
Max
Units
CIN
Symbol
Control Input Capacitance
Parameter
4
6
pF
Conditions
VCC = 5.0V
CI/O (OFF)
Input/Output Capacitance
9
13
pF
VCC = 5.0V
Note 8: Capacitance is characterized but not tested.
On-Resistance (RON) vs Input Voltage
(VCC = 5.0V)
3
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FST3383
AC Electrical Characteristics
FST3383
Physical Dimensions inches (millimeters) unless otherwise noted
24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
Package Number M24B
24-Lead Quarter Size Outline Package (QSOP), JEDEC MO-137, 0.150 Wide
Package Number MQA24
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4
24-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Package Number MTC24
Technology Description
The Fairchild Switch family derives from and embodies Fairchild’s proven switch technology used for several years in its
74LVX3L384 (FST3384) bus switch product.
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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:
2. A critical component in any component of a life support
1. Life support devices or systems are devices or systems
device or system whose failure to perform can be reawhich, (a) are intended for surgical implant into the
sonably expected to cause the failure of the life support
body, or (b) support or sustain life, and (c) whose failure
device or system, or to affect its safety or effectiveness.
to perform when properly used in accordance with
instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the
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user.
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.
FST3383 10-Bit Low Power Bus-Exchange Switch
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
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