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FST3384

更新时间：2025-07-12 02:42:26

品牌：FAIRCHILD

描述：10-Bit Low Power Bus Switch

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FST3384 概述

10-Bit Low Power Bus Switch 10位低功耗总线开关

FST3384 数据手册

通过下载FST3384数据手册来全面了解它。这个PDF文档包含了所有必要的细节，如产品概述、功能特性、引脚定义、引脚排列图等信息。

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September 1997

Revised December 1999

FST3384

10-Bit Low Power Bus Switch

General Description

Features

■ 4Ω switch connection between two ports

■ Minimal propagation delay through the switch

■ Ultra low power with < 0.1 µA typical I_CC

The Fairchild Switch FST3384 provides 10 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 two 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.

■ Zero ground bounce in flow-through mode

■ Control inputs compatible with TTL level

Ordering Code:

Order Number

FST3384WM

FST3384QSC

FST3384MTC

Package Number

M24B

Package Description

24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide

24-Lead Quarter Size Outline Package (QSOP), JEDEC MO-137, 0.150 Wide

24-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide

MQA24

MTC24

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

Logic Diagram

Connection Diagram

Truth Table

Pin Descriptions

Pin Names

Description

OEA OEB

B₀–B₄

B₅–B₉

Function

OEA, OEB

Bus Switch Enable

Bus A

Bus B

A₀–A₄

HIGH-Z State A₅–A₉

A₅–A₉

Connect

A₀–A₉

B₀–B₉

HIGH-Z State

HIGH-Z State HIGH-Z State Disconnect

DS500046

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Print form created on December 13, 1999 4:03

Absolute Maximum Ratings(Note 1)

Recommended Operating

Conditions ^{(Note 3)}

Supply Voltage (V_CC

)

−0.5V to +7.0V

−50 mA

DC Switch Voltage (V_S)

Power Supply Operating (V_CC

Input Voltage (V_IN

Output Voltage (V_OUT

)

4.0V to 5.5V

0V to 5.5V

DC Input Voltage (V_IN) (Note 2)

DC Input Diode Current (I_IK) V_IN<0V

DC Output (I_OUT) Sink Current

)

128 mA

Input Rise and Fall Time (t_r, t_f)

Switch Control Input

DC V_CC/GND Current (I_CC/I_GND

)

+/− 100mA

0nS/V to 5nS/V

0nS/V to DC

Storage Temperature Range (T_STG

)

−65°C to +150°C

Switch I/O

Free Air Operating Temperature (T_A)

−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

_A= −40°C to +85°C

V_CC

(V)

Symbol

Parameter

Units

Condition

Typ

Min

Max

(Note 4)

V_IK

Clamp Diode Voltage

HIGH Level Input Voltage

LOW Level Input Voltage

Input Leakage Current

OFF-STATE Leakage Current

Switch On Resistance

(Note 5)

4.5

4.0-5.5

5.5

−1.2

I_IN= − 18mA

V_IH

V_IL

I_I

2.0

0.8

±1.0

µA

Ω

0 ≤ V_IN≤ 5.5V

0 ≤ A, B ≤ V_CC

I_OZ

R_ON

5.5

4.5

_IN= 0V, I_IN= 64mA

4.5

Ω

_IN= 0V, I_IN= 30mA

4.5

Ω

_IN= 2.4V, I_IN= 15mA

_IN= V_CCor GND, I_OUT= 0

4.0

Ω

I_CC

Quiescent Supply Current

Increase in I_CCper Input

5.5

µA

∆ I_CC

5.5

2.5

One input at 3.4V

Other inputs at V_CCor GND

Note 4: All typical values are at V_CC= 5.0V, T_A= 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.

www.fairchildsemi.com

AC Electrical Characteristics

_A= −40°C to +85°C

_L= 50 pF, RU = RD = 500Ω

_CC= 4.0V

Symbol

Parameter

Units

Conditions

Figure No.

_CC= 4.5 − 5.5V

Min

Max

Min

Max

_PHL, t_PLH

Prop Delay Bus to Bus (Note 6)

0.25

V_I= OPEN

Figure 1

Figure 2

t_PZH, t_PZL

Output Enable Time

OE_A, OE_Bto An, Bn

Output Disable Time

OE_A, OE_Bto An, Bn

1.0

1.5

5.7

5.2

6.2

5.5

V_I= 7V for t_PZL

Figure 1

Figure 2

V_I= OPEN for t_PZH

I_I= 7V for t_PLZ

t_PHZ, t_PLZ

Figure 1

Figure 2

V_I= OPEN for t_PHZ

Note 6: 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 7)

Symbol

C_IN

C_I/O(OFF)

Parameter

Control Input Capacitance

Input/Output Capacitance

Typ

Max

Units

Conditions

_CC= 5.0V

V_CC, OE = 5.0V

Note 7: Capacitance is characterized but not tested.

AC Loading and Waveforms

FST3384 V_INvs R_ON(Typ)

Note: Input driven by 50 Ω source terminated in 50 Ω

Note: C_Lincludes load and stray capacitance

Note: Input PRR = 1.0 MHz, t_W= 500 nS

FIGURE 1. AC Test Circuit

FIGURE 2. AC Waveforms

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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

www.fairchildsemi.com

Physical Dimensions inches (millimeters) unless otherwise noted (Continued)

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.

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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