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Should Buyer purchase or use ON Semiconductor products for any such unintended or unauthorized application, Buyer shall indemnify and hold ON Semiconductor and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that ON Semiconductor was negligent regarding the design or manufacture of the part. ON Semiconductor is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.74VHC138 3-to-8 Decoder/Demultiplexer November 1992 Revised April 1999 74VHC138 3-to-8 Decoder/Demultiplexer 0V to 7V can be applied to the input pins without regard to General Description the supply voltage. This device can be used to interface 5V The VHC138 is an advanced high speed CMOS 3-to-8 to 3V systems and two supply systems such as battery decoder/demultiplexer fabricated with silicon gate CMOS back up. This circuit prevents device destruction due to technology. It achieves the high speed operation similar to mismatched supply and input voltages. equivalent Bipolar Schottky TTL while maintaining the CMOS low power dissipation. Features When the device is enabled, 3 binary select inputs (A , A 0 1 High Speed: t = 5.7ns (typ) at T = 25C PD A and A ) determine which one of the outputs (O O ) will go 2 0 7 Low power dissipation: I = 4 A (max.) at T = 25C LOW. When enable input E is held LOW or either E or E CC A 3 1 2 is held HIGH, decoding function is inhibited and all outputs High noise immunity: V = V = 28% V (min.) NIH NIL CC go HIGH. E , E and E inputs are provided to ease cas- 3 1 2 Power down protection provided on all inputs cade connection and for use as an address decoder for Pin and function compatible with 74HC138 memory systems. An input protection circuit ensures that Ordering Code: Order Number Package Number Package Description 74VHC138M M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow 74VHC138SJ M16D 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 74VHC138MTC MTC16 16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide 74VHC138N N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Surface mount packages are also available on Tape and Reel. Specify by appending the suffix letter X to the ordering code. Logic Symbols Connection Diagram IEEE/IEC Pin Descriptions Pin Names Description A A Address Inputs 0 2 E E Enable Inputs 1 2 E Enable Input 3 O O Outputs 0 7 1999 Fairchild Semiconductor Corporation DS011537.prf www.fairchildsemi.com