FST32X245QSPX

FST32X245QSPX Datasheet

FST32X245 16-Bit Bus Switch

Part	Datasheet
FST32X245QSPX	FST32X245QSPX (pdf)

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FST32X245 16-Bit Bus Switch FST32X245 16-Bit Bus Switch The Fairchild Switch FST32X245 provides 16-bits of high speed CMOS TTL-compatible bus switching in a standard flow-through mode. 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 16-bit switch. 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. s 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 16-bit version of FST3245 Ordering Code: Order Number Package Number Package Description FST32X245QSP MQA40A 40-Lead Quarter Size Very Small Outline Package QVSOP , JEDEC MO-154, Wide Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Logic Diagram Connection Diagram Pin Descriptions Pin Name OEn An Bn NC Bus Switch Enable Bus A Bus B No Connect Function Table Input OEn L H Function Connect Disconnect 2002 Fairchild Semiconductor Corporation DS500620 FST32X245 Absolute Maximum Ratings Note 1 Supply Voltage VCC DC Switch Voltage VS DC Input Voltage VIN Note 2 DC Input Diode Current lIK 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 −50mA 128mA +/− 100mA −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 tables are not guaranteed at the absolute maximum rating. 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 Conditions Clamp Diode Voltage HIGH Level Input Voltage LOW Level Input Voltage Input Leakage Current OFF-STATE Leakage Current Switch On Resistance

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FST32X245 16-Bit Bus Switch

FST32X245 16-Bit Bus Switch

The Fairchild Switch FST32X245 provides 16-bits of high speed CMOS TTL-compatible bus switching in a standard flow-through mode. 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 16-bit switch. 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.
s 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 16-bit version of FST3245
Ordering Code:

Order Number

Package Number

Package Description

FST32X245QSP MQA40A 40-Lead Quarter Size Very Small Outline Package QVSOP , JEDEC MO-154, Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.

Logic Diagram

Connection Diagram

Pin Descriptions

Pin Name

OEn An Bn NC

Bus Switch Enable Bus A Bus B

No Connect

Function Table

Input OEn L H

Function Connect Disconnect
2002 Fairchild Semiconductor Corporation DS500620

FST32X245

Absolute Maximum Ratings Note 1

Supply Voltage VCC DC Switch Voltage VS DC Input Voltage VIN Note 2 DC Input Diode Current lIK 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
−50mA 128mA +/− 100mA −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 tables are not guaranteed at the absolute maximum rating. 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

Conditions

Clamp Diode Voltage

HIGH Level Input Voltage

LOW Level Input Voltage

Input Leakage Current

OFF-STATE Leakage Current

Switch On Resistance

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Datasheet ID: FST32X245QSPX 515545