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54ACT257L Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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54ACT257L Datasheet(HTML) 1 Page - National Semiconductor (TI) |
1 / 8 page 54AC257 • 54ACT257 Quad 2-Input Multiplexer with TRI-STATE® Outputs General 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) in- put, allowing the outputs to interface directly with bus-oriented systems. Features n ICC and IOZ reduced by 50% n Multiplexer expansion by tying outputs together n Noninverting TRI-STATE outputs n Outputs source/sink 24 mA n ’ACT257 has TTL-compatible inputs n Standard Military Drawing (SMD) — ’AC257: 5962-88703 — ’ACT257: 5962-89689 Logic Symbols Pin Names Description S Common Data Select Input OE TRI-STATE Output Enable Input I 0a–I0d Data Inputs from Source 0 I 1a–I1d Data Inputs from Source 1 Z a–Zd TRI-STATE Multiplexer Outputs TRI-STATE® is a registered trademark of National Semiconductor Corporation. FACT™ is a trademark of Fairchild Semiconductor Corporation. DS100286-1 IEEE/IEC DS100286-2 July 1998 © 1998 National Semiconductor Corporation DS100286 www.national.com |
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