PDF 74FST3400QSR Data sheet ( Hoja de datos )

Número de pieza	74FST3400QSR
Descripción	4-Bit / 4-Port Bus Exchange Switch
Fabricantes	ON
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No Preview Available ! 74FST3400 4−Bit, 4−Port Bus Exchange Switch The ON Semiconductor 74FST3400 is a 4−bit, 4−port bus exchange switch. The device is CMOS TTL compatible when operating between 4.0 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. 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 QS3400, FST3400, CBT3400 • All Popular Packages: SOIC−24, TSSOP−24, QSOP−24 • All Devices in Package TSSOP are Inherently Pb−Free* BE C0 A0 B0 D0 C1 A1 B1 D1 BX0 BX1 GND 1 24 2 23 3 22 4 21 5 20 6 19 7 18 8 17 9 16 10 15 11 14 12 13 VCC D3 B3 A3 C3 D2 B2 A2 C2 NC BX3 BX2 Figure 1. 24−Lead Pinout TRUTH TABLE BE BX0 BX1 BX2 BX3 A0−3 B0−3 Function H X X X X Hi−Z Hi−Z Disconnect L BXi = L C0−3 D0−3 Connect L BXi = H D0−3 C0−3 Exchange NOTE: H = HIGH Voltage Level, L = LOW Voltage Level, X = Don’t Care, NOTE: Hi−Z = High Impedance, i = 0, 1, 2 or 3 For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. © Semiconductor Components Industries, LLC, 2005 January, 2005 − Rev. 5 1 http://onsemi.com MARKING DIAGRAMS 24 1 SOIC−24 DW SUFFIX CASE 751E 24 FST3400 AWLYWW 1 24 1 TSSOP−24 DT SUFFIX CASE 948H 24 FST 3400 ALYW 1 24 1 QSOP−24 QS SUFFIX CASE 492B 24 FST3400 AWLYYWW 1 A = Assembly Location L, WL = Wafer Lot Y, YY = Year W, WW = Work Week PIN NAMES Pin BE Ax, Bx, Cx, Dx OE1, OE2 OE1, OE2 OE1, OE2 OE1, OE2 OE1, OE2 OE1, OE2 OE1, OE2 Description Bus Enable Input (Active LOW) Bus A, Bus B, Bus C, Bus D Bus Exchange (Bit 0) Bus Exchange (Bit 1) Bus Exchange (Bit 2) Bus Exchange (Bit 3) No Connect Ground Power ORDERING INFORMATION See detailed ordering and shipping information in the package dimensions section on page 2 of this data sheet. Publication Order Number: 74FST3400/D 1 page 74FST3400 AC Loading and Waveforms FROM OUTPUT UNDER TEST VI 500 W CL 500 W NOTES: 1. Input driven by 50 W source terminated in 50 W. 2. CL includes load and stray capacitance. *CL = 50 pF Figure 3. AC Test Circuit SWITCH INPUT 10 % tPLH tf = 2.5 nS 90 % 1.5 V 90 % 1.5 V OUTPUT 1.5 V tf = 2.5 nS 3.0 V 10 % GND tPLH VOH 1.5 V VOL Figure 4. Propagation Delays ENABLE INPUT tf = 2.5 nS 90 % 1.5 V tPZL OUTPUT tPZH OUTPUT 10 % 10 % 1.5 V 1.5 V tf = 2.5 nS 90 % 3.0 V 1.5 V GND tPZL VOL + 0.3 V VOL tPHZL VOH VOH − 0.3 V Figure 5. Enable/Disable Delays http://onsemi.com 5 5 Page

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