54AC257

OBSOLETE 54AC257, 54ACT257 www.ti.com SNOS102B – JULY 1998 – REVISED APRIL 2013 54AC257 54ACT257 Quad 2-Input Multiplexer with TRI-STATE Outputs Check for Samples: 54AC257, 54ACT257 FEATURES 1 23 ICC and IOZ Reduced by 50% Multiplexer Expansion by Tying Outputs Together Noninverting TRI-STATE Outputs Outputs Source/Sink 24 mA 'ACT257 has TTL-Compatible Inputs Standard Military Drawing (SMD) – 'AC257: 5962-88703 – 'ACT257: 5962-89689 DESCRIPTION The 'AC/'ACT257 is a quad 2-input multiplexer with TRI-STATE outputs. Four bits of data from two sources can be selected using a Common Data Select input. The four outputs present the selected data in true (noninverted) form. The outputs may be switched to a high impedance state by placing a logic HIGH on the common Output Enable (OE) input, allowing the outputs to interface directly with busoriented systems. Logic Symbols IEEE/IEC Figure 1. PIN DESCRIPTION S OE I0a–I0d I1a–I1d Za–Zd Pin Names Common Data Select Input TRI-STATE Output Enable Input Data Inputs from Source 0 Data Inputs from Source 1 TRI-STATE Multiplexer Outputs Figure 2. Description 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. FACT is a trademark of Fairchild Semiconductor. 2 All other trademarks are the property of their respective owners. 3 PRODUCTION DATA inf...