Datasheet

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September 1997

Revised November 2000

FST3384 10-Bit Low Power Bus Switch

FST3384

10-Bit Low Power Bus Switch

General Description

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.

Features

■ 4Ω switch connection between two ports

■ Minimal propagation delay through the switch

■ Ultra low power with

< 0.1 µA typical I

■ Zero ground bounce in flow-through mode

■ Control inputs compatible with TTL level

Ordering Code:

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

Logic Diagram

Pin Descriptions

Connection Diagram

Truth Table

Order Number Package Number Package Description

FST3384WM M24B 24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide

FST3384QSC MQA24 24-Lead Quarter Size Outline Package (QSOP), JEDEC MO-137, 0.150 Wide

FST3384MTC MTC24 24-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide

Pin Names Description

, OE

Bus Switch Enable

–A

Bus A

–B

Bus B

–B

Function

LLA

–A

Connect

LHA

–A

HIGH-Z State Connect

H L HIGH-Z State A

–A

Connect

H H HIGH-Z State HIGH-Z State Disconnect

Summary of content (5 pages)

PAGE 1
Revised November 2000 FST3384 10-Bit Low Power Bus Switch General Description Features The Fairchild Switch FST3384 provides 10 bits of highspeed 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) signals. When OE is LOW, the switch is ON and Port A is connected to Port B.
PAGE 2
FST3384 Absolute Maximum Ratings(Note 1) Recommended Operating Conditions (Note 3) Supply Voltage (VCC ) −0.5V to +7.0V DC Switch Voltage (VS) −0.5V to +7.0V Power Supply Operating (VCC) DC Input Voltage (VIN) (Note 2) −0.5V to +7.0V Input Voltage (VIN) 0V to 5.5V 0V to 5.5V DC Input Diode Current (IIK) VIN<0V −50 mA Output Voltage (VOUT) DC Output (IOUT ) Sink Current 128 mA Input Rise and Fall Time (tr, tf) +/− 100mA DC VCC/GND Current (ICC/IGND) Storage Temperature Range (TSTG) 4.
PAGE 3
TA = −40°C to +85°C Symbol CL = 50 pF, RU = RD = 500Ω Parameter VCC = 4.5 − 5.5V Min tPHL, tPLH tPZH, tPZL Prop Delay Bus to Bus (Note 6) Output Enable Time OE1, OE2 to An, Bn tPHZ, tPLZ Output Disable Time OE1, OE2 to An, Bn Max VCC = 4.0V Min Units Conditions Figure No. Max 0.25 0.25 ns 1.0 5.7 6.2 ns 1.5 5.2 5.
PAGE 4
FST3384 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.
PAGE 5
FST3384 10-Bit Low Power Bus Switch 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.