器件名称:
74VHCT138A_07
功能描述:
3-to-8 Decoder/Demultiplexer
文件大小:
354.97KB 共9页
简 介:
74VHCT138A 3-to-8 Decoder/Demultiplexer May 2007 74VHCT138A 3-to-8 Decoder/Demultiplexer Features ■ High Speed: tPD = 7.6ns (Typ.) at VCC = 5V ■ Low power dissipation: ICC = 4A (Max.) at TA = 25°C ■ Power down protection is provided on all inputs and tm General Description The VHCT138A is an advanced high speed CMOS 3-to-8 DECODER fabricated with silicon gate CMOS technology. It achieves the high speed operation similar to equivalent Bipolar Schottky TTL while maintaining the CMOS low power dissipation. When the device is enabled, 3 Binary Select inputs (A0, A1 and A2) determine which one of the outputs (O0–O7) will go LOW. When enable input E3 is held LOW or either E1 or E2 is held HIGH, decoding function is inhibited and all outputs go HIGH. E3, E1 and E2 inputs are provided to ease cascade connection and for use as an address decoder for memory systems. Protection circuits ensure that 0V to 7V can be applied to the input pins without regard to the supply voltage and to the output pins with VCC = 0V. These circuits prevent device destruction due to mismatched supply and input/output voltages. This device can be used to interface 3V to 5V systems and two supply systems such as battery backup. outputs ■ Pin and function compatible with 74HCT138 Ordering Information Order Number 74VHCT138AM 74VHCT138ASJ 74VHCT138AMTC Package Number M16A M16D MTC16 Package Description 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow 16-Lead Small Outline Pack……
