DatasheetsPDF.com

FST3257 Dataheets PDF



Part Number FST3257
Manufacturers Fairchild Semiconductor
Logo Fairchild Semiconductor
Description Quad 2:1 Multiplexer / Demultiplexer Bus Switch
Datasheet FST3257 DatasheetFST3257 Datasheet (PDF)

FST3257 — Quad 2:1 Multiplexer / Demultiplexer Bus Switch May 2009 FST3257 Quad 2:1 Multiplexer / Demultiplexer Bus Switch Features ƒ 4Ω Switch Connection Between Two Ports ƒ Minimal Propagation Delay Through the Switch ƒ Low ICC ƒ Zero Bounce in Flow-Through Node ƒ Control Inputs Compatible with TTL Level Description The Fairchild Switch FST3257 is a quad 2:1 high-speed CMOS TTL-compatible multiplexer / demultiplexer bus switch. The low on resistance of the switch allows inputs to be connec.

  FST3257   FST3257



Document
FST3257 — Quad 2:1 Multiplexer / Demultiplexer Bus Switch May 2009 FST3257 Quad 2:1 Multiplexer / Demultiplexer Bus Switch Features ƒ 4Ω Switch Connection Between Two Ports ƒ Minimal Propagation Delay Through the Switch ƒ Low ICC ƒ Zero Bounce in Flow-Through Node ƒ Control Inputs Compatible with TTL Level Description The Fairchild Switch FST3257 is a quad 2:1 high-speed CMOS TTL-compatible multiplexer / demultiplexer bus switch. The low on resistance of the switch allows inputs to be connected to outputs without adding propagation delay or generating additional ground bounce noise. When /OE is LOW, the select pin connects the A port to the selected B port output. When /OE is HIGH, the switch is OPEN and a high-impedance state exists between the two ports. Ordering Information Operating Part Number Temperature Range FST3257M -40 to 85°C FST3257MX -40 to 85°C FST3257QSC -40 to 85°C FST3257QSCX -40 to 85°C FST3257MTC -40 to 85°C FST3257MTCX -40 to 85°C Eco Status Package RoHS Green RoHS 16-Lead Small Outline Integrated Circuit (SOIC) JEDEC MS-012,0.150 Narrow 16-Lead Quarter Size Outline Package (QSOP) JEDEC MO-137 0.150 Inch Wide 16-Lead Thin Shrink Small Outline Package (TSSOP) JEDEC MO-153, 4mm Wide Packing Method Tubes Tape and Reel Tubes Tape and Reel Tubes Tape and Reel For Fairchild’s definition of Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html. © 1997 Fairchild Semiconductor Corporation FST3257 • Rev. 1.0.3 www.fairchildsemi.com FST3257 — Quad 2:1 Multiplexer / Demultiplexer Bus Switch Pin Assignments Figure 1. Logic Diagram Figure 2. Connection Diagram Pin Descriptions Pin # 1 2, 3, 5, 6, 10, 11, 13, 14 4, 7, 9, 12 8 15 16 Truth Table Select Inputs S Logic Level LOW Logic Level HIGH Names S 1B1, 1B2 ,2B1, 2B2, 3B1, 3B2, 4B1, 4B2 1A, 2A, 3A, 4A GND /OE VCC Bus Switch Enabled Logic Level HIGH Logic Level LOW Logic Level LOW Description Select Input Bus B Bus A Ground Bus Switch Enables Supply Voltage Function Disconnected A=B1 A=B2 © 1997 Fairchild Semiconductor Corporation FST3257 • Rev. 1.0.3 2 www.fairchildsemi.com FST3257 — Quad 2:1 Multiplexer / Demultiplexer Bus Switch Absolute Maximum Ratings Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only. Symbol Parameter Min. Max. Unit VCC Supply Voltage -0.5 +7.0 V VS DC Switch Voltage VIN DC Input Voltage(1) -0.5 +7.0 V -0.5 +7.0 V IIK DC Input Current -50 mA IOUT DC Output Sink Current 128 mA ICC/IGND DC VCC/GND Current ±100 mA TSTG Storage Temperature Range -65 +150 °C Note: 1. The input and output negative voltage ratings may be exceeded if the input and output diode current ratings are observed. Recommended Operating Conditions The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not recommend exceeding them or designing to Absolute Maximum Ratings. Symbol Parameter Min. VCC Power Supply Operating 3.0 VIN Input Voltage 0 VOUT Output Voltage 0 Switch Control Input 0 tr,tf Input Rise and Fall Time Switch I/O 0 TA Free Air Operating Temperature -40 Note: 2. Unused control inputs must be held HIGH or LOW. They may not float. Max. 5.5 5.5 5.5 5 DC +85 Unit V V V ns/V °C © 1997 Fairchild Semiconductor Corporation FST3257 • Rev. 1.0.3 3 www.fairchildsemi.com FST3257 — Quad 2:1 Multiplexer / Demultiplexer Bus Switch DC Electrical Characteristics Symbol Parameter Conditions VCC (V) TA=-40 to +85°C Units Min. Typ.(3) Max. VIK Clamp Diode Voltage IIN=-18mA VIH High-Level Input Voltage VIL Low-Level Input Voltage 4.5 3.0 to 3.6(5) 1.8 4.0 to 5.5 2.0 3.0 to 3.6(5) 4.0 to 5.5 -1.2 V V 0.7 V 0.8 IIN Input Leakage Current 0 ≤ VIN ≤ 5.5 5.5 ±1.0 µA IOZ Off-state Leakage Current 0 ≤ A, B ≤ VCC VIN=0V, IIN=64mA VIN=0V, IIN=30mA VIN=2.4V, IIN=15mA RON Switch On Resistance(4) VIN=2.4V, IIN=15mA VIN=0V, IIN=64mA 5.5 3.3(5) 3.3(5) 3.3(5) 3.0(5) 4.5 ±1.0 µA 13 20 28 40 200 230 210 250 Ω 4 7 VIN=0V, IIN=30mA 4.5 4 7 VIN=2.4V, IIN=15mA 4.5 8 15 VIN=2.4V, IIN=15mA 4.0 11 20 ICC Quiescent Supply Current VIN=VCC or GND, IOUT=0, 5.5 3 µA ΔICC Increase in ICC per input One Input at 3.4V, Other inputs at VCC or GND 5.5 2.5 mA Notes: 3. Typical values are at nominal VCC for the VCC range and TA=25°C. 4. Measured by the voltage drop between A and B pins at the indicated current through the switch. On resistance is determined by the lower of th.


FSA5157 FST3257 FSA3031


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site.
(Privacy Policy & Contact)