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TC74ACT257F Datasheet(PDF) 1 Page - Toshiba Semiconductor |
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TC74ACT257F Datasheet(HTML) 1 Page - Toshiba Semiconductor |
1 / 8 page TC74ACT257P/F/FN 2007-10-01 1 TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC74ACT257P,TC74ACT257F,TC74ACT257FN 2-Channel Multiplexer (3-state) The TC74ACT257 is an advanced high speed CMOS MULTIPLEXER fabricated with silicon gate and double-layer metal wiring C2MOS technology. It achieve the high speed operation similar to equivalent Bipolar Schottky TTL while maintaining the CMOS low power dissipation. This device may be used as a level converter for interfacing TTL or NMOS to High Speed CMOS. The inputs are compatible with TTL or NMOS and CMOS output voltage levels. Each is composed of four independent 2-channel multiplexers with common SELECT and ENABLE OUTPUT ( OE ). If OE is set low, the outputs are held in a high-impedance state. When SELECT is set low, “A” data inputs are enabled. Conversely, when SELECT is high, “B” data inputs are enabled. All inputs are equipped with protection circuits against static discharge or transient excess voltage. Features • High speed: tpd = 5.8 ns (typ.) at VCC = 5 V • Low power dissipation: ICC = 8 μA (max) at Ta = 25°C • Compatible with TTL outputs: VIL = 0.8 V (max) VIH = 2.0 V (min) • Symmetrical output impedance: |IOH| = IOL = 24 mA (min) Capability of driving 50 Ω transmission lines. • Balanced propagation delays: tpLH ∼− tpHL • Pin and function compatible with 74F257 Pin Assignment Note: xxxFN (JEDEC SOP) is not available in Japan. TC74ACT257P TC74ACT257F TC74ACT257FN Weight DIP16-P-300-2.54A : 1.00 g (typ.) SOP16-P-300-1.27A : 0.18 g (typ.) SOL16-P-150-1.27 : 0.13 g (typ.) |
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