74VHC139

74VHC139 Dual 2-to-4 Decoder/Demultiplexer November 1992 Revised April 1999 74VHC139 Dual 2-to-4 Decoder/Demultiplexer General Description The VHC139 is an advanced high speed CMOS Dual 2-to4 Decoder/Demultiplexer 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. The active LOW enable input can be used for gating or it can be used as a data input for demultiplexing applications. When the enable input is held HIGH, all four outputs are fixed at a HIGH logic level independent of the other inputs. An input protection circuit ensures that 0V to 7V can be applied to the input pins without regard to the supply volt- age. This device can be used to interface 5V to 3V systems and two supply systems such as battery back up. This circuit prevents device destruction due to mismatched supply and input voltages. Features s High Speed: tPD = 5.0 ns (typ) at TA = 25°C s Low power dissipation: ICC = 4 µA (Max.) at TA = 25°C s High noise immunity: VNIH = VNIL = 28% VCC (Min.) s Power down protection is provided on all inputs s Pin and function compatible with 74HC139 Ordering Code: Order Number 74VHC139M 74VHC139SJ 74VHC139MTC 74VHC139N Package Number Package Description M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150” Narrow M16D 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide MTC16 16-Lead Thin Shrink Small Outlin...