TC74VHCT138

The TC74VHCT138 is one member of the advanced high speed CMOS 3-to-8 line decoder that designed with silicon gate CMOS technology. It achieves the high speed operation similar to equivalent bipolar schottky TTL while maintaining the CMOS low power dissipation. The signal level applied to the D input is transferred to Q output during the positive going transition of the CK pulse. And the input voltage are compatible with TTL output voltage. This device may be used as a level converter for interfacing 3.3 V to 5 V system.

Features of the TC74VHCT138 are:(1)high speed:tpd=7.6 ns(typ.) at Vcc=5 V;(2)low power dissipation:Icc=4 uA(max.) at Ta=25;(3)compatible with TTL outputs:VIL=0.8 V and VIH=2.0 V;(4)power down protection is provided on all inputs and outputs;(5)balanced propagation delays:tPLH=tPHL;(6)pin and function compatible with the 74 series 138 type.

The absolute maximum ratings of the TC74VHCT138 can be summarized as:(1)supply voltage range:-0.5 to 7.0 V;(2)DC input voltage:-0.5 to 7.0 V;(3)DC output voltage:-0.5 to 7.0 V or -0.5 to Vcc+0.5 V;(4)input diode current:-20 mA;(5)output diode current:+/-20 mA;(6)DC output current:+/-25 mA;(7)DC Vcc/ground current:+/-75 mA;(8)power dissipation:180 mW;(9)storage temperature:-65 to +150. If you want to know more information such as the electrical characteristics about the TC74VHCT138, please download the datasheet in www.seekic.com or www.chinaicmart.com .