FSTU32X384QSP

FSTU32X384QSP Datasheet

FSTU32X384 20-Bit Low Power Bus Switch with −2V Undershoot Protection

Part	Datasheet
FSTU32X384QSP	FSTU32X384QSP (pdf)

Related Parts	Information
FSTU32X384QSPX	FSTU32X384QSPX

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FSTU32X384 20-Bit Low Power Bus Switch with −2V Undershoot Protection FSTU32X384 20-Bit Low Power Bus Switch with −2V Undershoot Protection The Fairchild Switch FSTU32X384 provides 20 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 four 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. When OE is HIGH, the switch is OPEN and a high-impedance state exists between the two ports. 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 senses undershoot at the I/O and responds by preventing voltage differentials from developing and turning the switch on. s switch connection between two ports s Minimal propagation delay through the switch s Ultra low power with < µA typical ICC s Zero ground bounce in flow-through mode s Control inputs compatible with TTL level s See Application Note AN-5008 for details on FSTU - Undershoot Protected Fairchild Switch Family Ordering Code: Order Number Package Number Package Description FSTU32X384QSP MQA48A 48-Lead Quarter Size Very Small Outline Package QVSOP , JEDEC MO-154, Wide Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code. Logic Diagram is a registered trademark of Fairchild Semiconductor Corporation. 2002 Fairchild Semiconductor Corporation DS500705 FSTU32X384 Pin Descriptions Pin Names OEX A B Truth Table Description Bus Switch Enable Bus A Bus B Inputs OEX L H Inputs/Outputs A, B A=B Z Connection Diagram FSTU32X384 Absolute Maximum Ratings Note 1 Supply Voltage VCC DC Switch Voltage VS DC Input Voltage VIN Note 2 DC Input Diode Current IIK VIN < 0V DC 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 −50 mA 128 mA ± 100 mA −65°C to +150°C Recommended Operating Conditions Note 3 Power Supply Operating VCC Input Voltage VIN Output Voltage VOUT Input Rise and Fall Time tr, tf Switch Control Input 4.0V to 5.5V 0V to 5.5V 0V to 5.5V 0 ns/V to 5 ns/V Switch I/O 0 ns/V to DC 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 Parameter VCC V TA = −40°C to +85°C Units Note 4 Condition VIK VIH VIL II IOZ RON VIKU Clamp Diode Voltage

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FSTU32X384 20-Bit Low Power Bus Switch with −2V Undershoot Protection

FSTU32X384
20-Bit Low Power Bus Switch with −2V Undershoot Protection

The Fairchild Switch FSTU32X384 provides 20 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 four 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. When OE is HIGH, the switch is OPEN and a high-impedance state exists between the two ports.

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 senses undershoot at the I/O and responds by preventing voltage differentials from developing and turning the switch on.
s switch connection between two ports s Minimal propagation delay through the switch s Ultra low power with < µA typical ICC s Zero ground bounce in flow-through mode s Control inputs compatible with TTL level s See Application Note AN-5008 for details on

FSTU - Undershoot Protected Fairchild Switch Family
Ordering Code:

Order Number

Package Number

Package Description

FSTU32X384QSP MQA48A 48-Lead Quarter Size Very Small Outline Package QVSOP , JEDEC MO-154, Wide
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.

Logic Diagram
is a registered trademark of Fairchild Semiconductor Corporation.
2002 Fairchild Semiconductor Corporation DS500705

FSTU32X384

Pin Descriptions

Pin Names OEX A B

Truth Table

Description Bus Switch Enable

Bus A Bus B

Inputs OEX L H

Inputs/Outputs A, B A=B Z

Connection Diagram

FSTU32X384

Absolute Maximum Ratings Note 1

Supply Voltage VCC DC Switch Voltage VS DC Input Voltage VIN Note 2 DC Input Diode Current IIK VIN < 0V DC 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
−50 mA 128 mA ± 100 mA −65°C to +150°C

Recommended Operating Conditions Note 3

Power Supply Operating VCC Input Voltage VIN Output Voltage VOUT Input Rise and Fall Time tr, tf

Switch Control Input
4.0V to 5.5V 0V to 5.5V 0V to 5.5V
0 ns/V to 5 ns/V

Switch I/O
0 ns/V to DC

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

Parameter

VCC V

TA = −40°C to +85°C

Units

Note 4

Condition

VIK VIH VIL II

IOZ RON

VIKU

Clamp Diode Voltage

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Datasheet ID: FSTU32X384QSP 515557