FSTU16862QSPX

FSTU16862QSPX Datasheet


FSTU16862 20-Bit Bus Switch with Undershoot Protection

Part Datasheet
FSTU16862QSPX FSTU16862QSPX FSTU16862QSPX (pdf)
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FSTU16862 20-Bit Bus Switch with Undershoot Protection

FSTU16862 20-Bit Bus Switch with Undershoot Protection

The Fairchild Switch FSTU16862 provides 20-bits of highspeed CMOS TTL-compatible bus switching. 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 a 20-bit bus switch. When OEX is LOW, the switch is ON and Port A is connected to Port B. When OEX is HIGH, a high impedance state exists between the A and B 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 Undershoot hardened to A and B Ports s 4 switch connection between two ports s Minimal propagation delay through the switch s Low lCC s Zero 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

FSTU16862QSP MQA48A 48-Lead Quarter Size Very Small Outline Package QVSOP , JEDEC MO-154, Wide

FSTU16862MTD MTD48 48-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.
is a trademark of Fairchild Semiconductor Corporation. 2005 Fairchild Semiconductor Corporation DS500703

FSTU16862

Logic Diagram

Connection Diagram

Pin Descriptions

Pin Name

OEx A B

Description Bus Switch Enables

Bus A Bus B

Truth Table

Inputs

OEx L H

H HIGH Voltage Level L LOW Voltage Level Z High Impedance

Inputs/Outputs

A, B AB

FSTU16862

Absolute Maximum Ratings Note 1

Supply Voltage VCC DC Switch Voltage VS Note 2 DC Input Voltage VIN Note 3 DC Input Diode Current lIK VIN 0V DC Output Current IOUT DC VCC/GND Current ICC/IGND Storage Temperature Range TSTG
mA 128 mA r100 mA to qC

Recommended Operating Conditions Note 4

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 qC to qC

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 rating. The “Recommended Operating Conditions” table will define the conditions for actual device operation.

Note 2 VS is the voltage observed/applied at either the A or B Ports across the switch.

Note 3 The input and output negative voltage ratings may be exceeded if the input and output diode current ratings are observed.

Note 4 Unused control inputs must be held HIGH or LOW. They may not float.

DC Electrical Characteristics

Parameter

TA qC to qC

Units

Note 5

Conditions

Clamp Diode Voltage

IIN mA

HIGH Level Input Voltage
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Datasheet ID: FSTU16862QSPX 515555