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TC74AC257P

Toshiba Semiconductor
Part Number TC74AC257P
Manufacturer Toshiba Semiconductor
Description 2-Channel Multiplexer
Published Aug 25, 2006
Detailed Description TC74AC257,258P/F TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC74AC257P, TC74AC257F TC74AC258P, TC74AC258...
Datasheet PDF File TC74AC257P PDF File

TC74AC257P
TC74AC257P

Overview
TC74AC257,258P/F TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC74AC257P, TC74AC257F TC74AC258P, TC74AC258F TC74AC257P/F TC74AC258P/F 2-Channel Multiplexer (3-state) 2-Channel Multiplexer (3-state,inverting) TC74AC257P, TC74AC258P The TC74AC257 and TC74AC258 are advanced high speed CMOS MULTIPLEXERs fabricated with silicon gate and double-layer metal wiring C2MOS technology.
They achieve the high speed operation similar to equivalent Bipolar Schottky TTL while maintaining the CMOS low power dissipation.
Each is composed of four independent 2-channel multiplexers with common SELECT and OUTPUT ENABLE ( OE ).
The TC74AC257 is a non-inverting multiplexer, while the TC74AC258 is an inverting.
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 = 3.
6 ns (typ.
) at VCC = 5 V • Low power dissipation: ICC = 8 μA (max) at Ta = 25°C • High noise immunity: VNIH = VNIL = 28% VCC (min) • Symmetrical output impedance: |IOH| = IOL = 24 mA (min) Capability of driving 50 Ω transmission lines.
• Balanced propagation delays: tpLH ∼− tpHL • Wide operating voltage range: VCC (opr) = 2 to 5.
5 V • Pin and function compatible with 74F257/258 TC74AC257F, TC74AC258F Weight DIP16-P-300-2.
54A SOP16-P-300-1.
27A : 1.
00 g (typ.
) : 0.
18 g (typ.
) Start of commercial production 1987-11 1 2014-03-01 Pin Assignment TC74AC257 TC74AC257,258P/F TC74AC258 IEC Logic Symbol TC74AC257 TC74AC258 Truth Table Inputs OE SELECT A H X X L L L L L H L H X L H X X: Don’t care Z: High impedance Outputs B Y (257) Y (258) X Z Z X L H X H L L L H H H L 2 2014-03-01 System Diagram TC74AC257 TC74AC258 TC74AC257,258P/F Absolute Maximum Ratings (Note 1) Characteristics Symbol Rating Unit Supply vol...


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