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TC74VHC257F

Toshiba
Part Number TC74VHC257F
Manufacturer Toshiba
Description Quad 2-Channel Multiplexer
Published Apr 23, 2005
Detailed Description TC74VHC257F/FT/FK TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC74VHC257F, TC74VHC257FT, TC74VHC257FK Qu...
Datasheet PDF File TC74VHC257F PDF File

TC74VHC257F
TC74VHC257F

Overview
TC74VHC257F/FT/FK TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC74VHC257F, TC74VHC257FT, TC74VHC257FK Quad 2-Channel Multiplexer (3-state) The TC74VHC257 is an advanced high speed CMOS MULTIPLEXER fabricated with silicon gate C2MOS technology.
It achieves the high speed operation similar to equivalent Bipolar Schottky TTL while maintaining the CMOS low power dissipation.
It is composed of four independent 2-channel multiplexers with common SELECT and OUTPUT ENABLE ( 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.
An input protection circuit ensures that 0 to 5.
5 V can be applied to the input pins without regard to the supply voltage.
This device can be used to interface 5 V to 3 V systems and two supply systems such as battery back up.
This circuit prevents device destruction due to mismatched supply and input voltages.
Features • High speed: tpd = 3.
6 ns (typ.
) at VCC = 5 V • Low power dissipation: ICC = 4 μA (max) at Ta = 25°C • High noise immunity: VNIH = VNIL = 28% VCC (min) • Power down protection is provided on all inputs.
• Balanced propagation delays: tpLH ∼− tpHL • Wide operating voltage range: VCC (opr) = 2 to 5.
5 V • Low noise: VOLP = 0.
8 V (max) • Pin and function compatible with 74ALS257 TC74VHC257F TC74VHC257FT TC74VHC257FK Weight SOP16-P-300-1.
27A TSSOP16-P-0044-0.
65A VSSOP16-P-0030-0.
50 : 0.
18 g (typ.
) : 0.
06 g (typ.
) : 0.
02 g (typ.
) Start of commercial production 1992-05 1 2014-03-01 Pin Assignment SELECT 1 1A 2 1B 3 1Y 4 2A 5 2B 6 2Y 7 GND 8 (top view) 16 VCC 15 OE 14 4A 13 4B 12 4Y 11 3A 10 3B 9 3Y Truth Table Inputs OE SELECT A B H X X X L L L X L L H X L H X L L H X H X: Don’t care Z: High impedance Output Z L H L H TC74VHC257F/FT/FK IEC Logic Symbol OE (15) EN SELECT (1) G1 1A (2) 1 1B (3) 1 2A (5) 2B (6) 3A (11) 3B (10) 4A (14) 4B (13) MUX (4) 1Y (...


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