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TC7MH257FK

Toshiba Semiconductor
Part Number TC7MH257FK
Manufacturer Toshiba Semiconductor
Description Quad 2-Channel Multiplexer
Published Jan 9, 2011
Detailed Description TC7MH257FK TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC7MH257FK Quad 2-Channel Multiplexer (3-State) T...
Datasheet PDF File TC7MH257FK PDF File

TC7MH257FK
TC7MH257FK


Overview
TC7MH257FK TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC7MH257FK Quad 2-Channel Multiplexer (3-State) The TC7MH257FK 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 OUTPUTENABLE (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 Weight: 0.
02 g (typ.
) 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.
) (VCC = 5 V) Low power dissipation: ICC = 4 μA (max) (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) = 2~5.
5 V Low noise: VOLP = 0.
8 V (max) Pin and function compatible with 74ALS257 1 2007-10-19 www.
DataSheet.
in TC7MH257FK Pin Assignment (top view) IEC Logic Symbol OE (15) (1) (2) (3) (5) (6) (11) (10) (14) (13) SELECT 1A 1B 1Y 2A 2B 2Y GND 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 VCC EN G1 1 1 MUX OE 4A 4B 4Y 3A 3B 3Y SELECT 1A 1B 2A 2B 3A 3B 4A 4B (4) (7) (9) (12) 1Y 2Y 3Y 4Y Truth Table Inputs OE H L L L L Select X L L H H A X L H X X B X X X L H Outputs Z L H L H X: Don’t care Z: High impedance System Diagram SELECT 1 1A 1B 2A 2B 3A 3B 4A 4B 2 3 5 6 11 10 14 13 12 4Y 9 3Y 7 2Y 4 1Y OE 15 2 2007-10-19 www.
DataSheet.
in TC7MH257FK Absolute Maximum Ratings (Note) Characteristics Supply volt...


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