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TC74VHC257FN

Toshiba
Part Number TC74VHC257FN
Manufacturer Toshiba
Description TRIPLE 3-INPUT NOR GATE
Published Apr 23, 2005
Detailed Description TC74VHC257F/FN/FT/FK TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC74VHC257F,TC74VHC257FN,TC74VHC257FT,TC...
Datasheet PDF File TC74VHC257FN PDF File

TC74VHC257FN
TC74VHC257FN

Overview
TC74VHC257F/FN/FT/FK TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC74VHC257F,TC74VHC257FN,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 Note: xxxFN (JEDEC SOP) is not available in Japan.
TC74VHC257F TC74VHC257FN TC74VHC257FT TC74VHC257FK Weight SOP16-P-300-1.
27A SOL16-P-150-1.
27 TSSOP16-P-0044-0.
65A VSSOP16-P-0030-0.
50 : 0.
18 g (typ.
) : 0.
13 g (typ.
) : 0.
06 g (typ.
) : 0.
02 g (typ.
) 1 2007-10-01 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 HXX LLL L LH LHX LHX X: Don’t care Z: High impedance B X X X L H Output Z L H L H TC74VHC257F/FN/FT/FK IEC Logic Symbol OE (15) EN SELECT (1) G1 1A (2) 1B (3) 2A (5) 2B (6) 3...


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