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74FST3244QS 데이터시트(PDF) 1 Page - ON Semiconductor |
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74FST3244QS 데이터시트(HTML) 1 Page - ON Semiconductor |
1 / 7 page © Semiconductor Components Industries, LLC, 2006 June, 2006 − Rev. 2 1 Publication Order Number: 74FST3244/D 74FST3244 8−Bit Bus Switch The ON Semiconductor 74FST3244 is an 8−bit, high performance switch. The device is CMOS TTL compatible when operating between 4 and 5.5 Volts. The device exhibits extremely low RON and adds nearly zero propagation delay. The device adds no noise or ground bounce to the system. The device consists of two 4−bit switches with separate Output/Enable (OE) pins. Port A is connected to Port B when OE is low. If OE is high, the switch is high Z. Features • RON t 4 W Typical • Less Than 0.25 ns−Max Delay Through Switch • Nearly Zero Standby Current • No Circuit Bounce • Control Inputs are TTL/CMOS Compatible • Pin−For−Pin Compatible with QS3244, FST3244, CBT3244 • All Popular Packages: QSOP−20, TSSOP−20, SOIC−20 • All Devices in Package TSSOP are Inherently Pb−Free* OE1 1A1 2B1 1A2 2B2 2B3 1A0 VCC 2A3 1B2 2A2 1B1 1B0 OE2 1 2 3 4 5 6 7 20 19 18 17 16 15 14 Figure 1. 20−Lead Pinout 1A3 8 2B0 9 GND 10 2A1 13 1B3 12 2A0 11 OE1 L Inputs L H OE2 L H L HH 1A, 1B 1A = 1B 1A = 1B Inputs/Outputs Z Z 2A, 2B 2A = 2B Z 2A = 2B Z TRUTH TABLE *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. Description PIN NAMES OE1, OE2 1A, 2A TSSOP−20 DT SUFFIX CASE 948E QSOP−20 QS SUFFIX CASE 492A SOIC−20 DW SUFFIX CASE 751D MARKING DIAGRAMS Pin Bus Switch Enables Bus A 1B, 2B Bus B 20 1 FST3244 AWLYYWW 1 20 20 1 FST 3244 ALYW A = Assembly Location L, WL = Wafer Lot Y = Year W, WW = Work Week 1 20 FST3244 AWLYWW 20 1 See detailed ordering and shipping information in the package dimensions section on page 2 of this data sheet. ORDERING INFORMATION 20 1 http://onsemi.com |
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