Product Summary

The QS3257S1 is a high-speed CMOS LVTTL-compatible Quad 2:1 multiplexer/demultiplexer. The QS3257S1 is a function and pinout compatible QuickSwitch version of the 74F257, 74FCT257, and the 74ALS/AS/LS257 Quad 2:1 multiplexers. The low ON resistance of the QS3257S1 allows inputs to be connected to outputs without adding propagation delay and without generating additional ground bounce noise. Mux/Demux devices provide an order of magnitude faster speed than equivalent logic devices. Applications are (1)Logic replacement; (2)Video, audio, graphics switching, muxing; (3)Hot-swapping, hot-docking; (4)Voltage translation (5V to 3.3V); (5)Bus funneling.

Parametrics

QS3257S1 absolute maximum ratings: (1)VTERM(2)Supply Voltage to Ground: -0.5 to +7 V; (2)VTERM(3)DC Switch Voltage Vs: -0.5 to +7 V; (3)VTERM(3)DC Input Voltage VIN: -0.5 to +7 V; (4)VAC AC Input Voltage (pulse width ≤ 20ns): -3 V; (5)IOUT DC Output Current: 120 mA; (6)PMAX Maximum Power Dissipation (TA = 85°C): 0.5 W; (7)TSTG Storage Temperature: -65 to +150 °C.

Features

QS3257S1 features: (1)Enhanced N channel FET with no inherent diode to Vcc; (2)5Ω bidirectional switches connect inputs to outputs; (3)Pin compatible with the 74F257, 74FCT257, and 74FCT257T; (4)Zero propagation delay, zero ground bounce; (5)Undershoot clamp diodes on all switch and control inputs; (6)TTL-compatible control inputs; (7)Available in SOIC, QSOP, and S1 packages.

Diagrams

QS3257S1 pin connection

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
QS3257S1G
QS3257S1G
IDT
Encoders, Decoders, Multiplexers & Demultiplexers 4X2:1 MUX-DEMUX, QSW
Data Sheet
0-1: $0.44
1-10: $0.34
10-100: $0.22
100-1000: $0.18
QS3257S1G8
QS3257S1G8
Other

Data Sheet
Negotiable