FAIRCHILD FST16233 数据手册

FST16233 16-Bit to 32-Bit Multiplexer/Demultiplexer Bus SwitchSeptember 1997Revised December 1999

FST16233

16-Bit to 32-Bit Multiplexer/Demultiplexer Bus Switch

General Description

The Fairchild Switch FST16233 is a 16-bit to 32-bit high-speed CMOS TTL-compatible multiplexer/demultiplexerbus switch. The low on resistance of the switch allowsinputs to be connected to outputs without adding propaga-tion delay or generating additional ground bounce noise.The device can be used in applications where two busesneed to be addressed simultaneously. The FST16233 canbe used as two 8-bit to 16-bit multiplexers or as one 16-bitto 32-bit multiplexer.

Two select (SEL1, SEL0) and two test (TEST0, TEST1)inputs provide switch enable and multiplexer select control.The FST16233 is designed to prevent through-currentwhen switching buses.

Features

s4Ω switch connection between two ports.sMinimal propagation delay through the switch.sLow lCC.

sZero bounce in flow-through mode.sControl inputs compatible with TTL level.

Ordering Code:

Order NumberFST16233MEAFST16233MTD

Package Number

MS56AMTD56

Package Description

56-Lead Shrink Small Outline Package (SSOP), JEDEC MO-118, 0.300 Wide56-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide

Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.

Logic Diagram

© 1999 Fairchild Semiconductor CorporationDS500055www.fairchildsemi.com

FST16233Connection DiagramPin Descriptions

Pin NameSEL0, SEL1TEST0, TEST1

AB1, B2

DescriptionSelect InputsTest InputsBus B BusA

Truth Table

InputsSELLHX

TESTLLH

FunctionA = B1A = B2

A = B1 and A = B2

www.fairchildsemi.com2

FST16233Absolute Maximum Ratings(Note 1)

Supply Voltage (VCC)DC Switch Voltage (VS)DC Input Voltage (VIN) (Note 2)DC Input Diode Current (lIK) VIN<0VDC Output (IOUT) Sink Current DC VCC/GND Current (ICC/IGND)Storage Temperature Range (TSTG)

−0.5V to +7.0V−0.5V to +7.0V−0.5V to +7.0V

−50mA128mA+/− 100mA−65°C to +150 °C

Recommended OperatingConditions (Note 3)

Power Supply Operating (VCC)Input Voltage (VIN)Output Voltage (VOUT)Input Rise and Fall Time (tr, tf)Switch Control InputSwitch I/O

Free Air Operating Temperature (TA)

0nS/V to 5nS/V0nS/V to DC−40 °C to +85 °C

4.0V to 5.5V0V to 5.5V0V to 5.5V

Note 1: The “Absolute Maximum Ratings” are those values beyond whichthe safety of the device cannot be guaranteed. The device should not beoperated at these limits. The parametric values defined in the ElectricalCharacteristics tables are not guaranteed at the absolute maximum rating.The “Recommended Operating Conditions” table will define the conditionsfor actual device operation.

Note 2: The input and output negative voltage ratings may be exceeded ifthe input and output diode current ratings are observed.

Note 3: Unused control inputs must be held HIGH or LOW. They may notfloat.

DC Electrical Characteristics

SymbolVIKVIHVILIIIOFFRON

Parameter

Clamp Diode VoltageHIGH Level Input VoltageLOW Level Input VoltageInput Leakage CurrentOFF-STATE Leakage CurrentSwitch On Resistance(Note 5)

VCC(V)4.54.0–5.54.0–5.55.505.54.54.54.54.0

ICC∆ ICC

Quiescent Supply CurrentIncrease in ICC per Input

5.55.5

44811

2.0

0.8±1.010±1.077122032.5

TA = −40 °C to +85 °CMin

Typ(Note 4)

Max−1.2

UnitsVVVµAµAµAΩΩΩΩµAmA

0≤ VIN ≤5.5VVIN = 5.5V0 ≤A, B ≤VCCVIN = 0V, IIN = 64mAVIN = 0V, IIN = 30mAVIN = 2.4V, IIN = 15mAVIN = 2.4V, IIN = 15mAVIN = VCC or GND, IOUT = 0One input at 3.4V

Other inputs at VCC or GND

Note 4: Typical values are at VCC = 5.0V and TA = +25°C

Note 5: Measured by the voltage drop between A and B pins at the indicated current through the switch. On resistance is determined by the lower of the voltages on the two (A or B) pins.

Conditions

IIN = −18mA

3www.fairchildsemi.com

FST16233AC Electrical Characteristics

TA = −40 °C to +85 °C,

Symbol

Parameter

CL = 50pF, RU= RD = 500ΩVCC = 4.5 − 5.5VMin

tPHL, tPLHtPHL,tPLHtPZH, tPZLtPHZ, tPLZ

A or B, to B or A (Note 6)SEL to A

Output Enable Time,SEL or TEST to BOutput Disable Time,SEL or TEST to B

1.5

7.8

8.5

ns

1.51.0

Max0.256.16.5

VCC = 4.0VMin

Max0.256.87.2

nsnsns

VI = OPENVI = OPENVI = 7V for tPZL,VI = OPEN for tPZHVI = 7V for tPLZ,VI = OPEN for tPHZ

Figure 1Figure 2Figure 1Figure 2Figure 1Figure 2Figure 1Figure 2

Units

Conditions

Figure No.

Note 6: This parameter is guaranteed by design but is not tested. The bus switch contributes no propagation delay other than the RC delay of the typical Onresistance of the switch and the 50pF load capacitance, when driven by an ideal voltage source (zero output impedance).

Capacitance (Note 7)

SymbolCINCI/O

Parameter

Control pin Input CapacitanceInput/Output Capacitance

Typ46

Max

UnitspFpF

Conditions

VCC = 5.0V

VCC = 5.0V, Switch OFF

Note 7: TA = +25°C, f = 1 MHz, Capacitance is characterized but not tested.

AC Loading and Waveforms

Note: Input driven by 50 Ω source terminated in 50 ΩNote: CL includes load and stray capacitanceNote: Input PRR = 1.0 MHz, tW = 500 ns

FIGURE 1. AC Test Circuit

FIGURE 2. AC Waveforms

www.fairchildsemi.com4

FST16233Physical Dimensions inches (millimeters) unless otherwise noted

56-Lead Shrink Small Outline Package (SSOP), JEDEC MO-118, 0.300 Wide

Package Number MS56A

5www.fairchildsemi.com

FST16233 16-Bit to 32-Bit Multiplexer/Demultiplexer Bus SwitchPhysical Dimensions inches (millimeters) unless otherwise noted (Continued)

56-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide

Package Number MTD56

Technology Description

The Fairchild Switch family derives from and embodies Fairchild’s proven switch technology used for several years in its74LVX3L384 (FST3384) bus switch product.

Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied andFairchild 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 SUPPORTDEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILDSEMICONDUCTOR CORPORATION. As used herein:1.Life support devices or systems are devices or systemswhich, (a) are intended for surgical implant into thebody, or (b) support or sustain life, and (c) whose failureto perform when properly used in accordance withinstructions for use provided in the labeling, can be rea-sonably expected to result in a significant injury to theuser.www.fairchildsemi.com

6

2.A critical component in any component of a life supportdevice or system whose failure to perform can be rea-sonably expected to cause the failure of the life supportdevice or system, or to affect its safety or effectiveness.

www.fairchildsemi.com