74HC137D

74HC137 3-to-8 line decoder, demultiplexer with address latches inverting Rev. 4 23 December 2015 Product data sheet 1. General description The 74HC137 is a high-speed Si-gate CMOS device and is pin compatible with low power Schottky TTL (LSTTL). The 74HC137 is specified in compliance with JEDEC standard no. 7A. The 74HC137 is a 3-to-8 line decoder, demultiplexer with latches at the three address inputs (An). The 74HC137 essentially combines the 3-to-8 decoder function with a 3-bit storage latch. When the latch is enabled (LE = LOW), the 74HC137 acts as a 3-to-8 active LOW decoder. When the latch enable (LE) goes from LOW-to-HIGH, the last data present at the inputs before this transition, is stored in the latches. Further address changes are ignored as long as LE remains HIGH. The output enable input (E1 and E2) controls the state of the outputs independent of the address inputs or latch operation. All outputs are HIGH unless E1 is LOW and E2 is HIGH. The 74HC137 is ideally suited for implementing non-overlapping decoders in 3-state systems and strobed (stored address) applications in bus oriented systems. 2. Features and benefits Combines 3-to-8 decoder with 3-bit latch Multiple input enable for easy expansion or independent controls Active LOW mutually exclusive outputs Low-power dissipation Complies with JEDEC standard no. 7A ESD protection: HBM JESD22-A114F exceeds 2000 V MM JESD22-A115-A exceeds 200 V Specified from 40 Cto+80 C and from 40 Cto+125 C. 3. Ordering information Table 1. Ordering information Type number Package Temperature range Name Description Version 74HC137D 40 C to +125 C SO16 plastic small outline package 16 leads SOT109-1 body width 3.9 mm 74HC137DB 40 C to +125 C SSOP16 plastic shrink small outline package 16 leads SOT338-1 body width 5.3 mm74HC137 NXP Semiconductors 3-to-8 line decoder, demultiplexer with address latches inverting 4. Functional diagram < < < < ,1387 2 7 < 7 / < < < ( ( Fig 1. Functional diagram < < < < < ,1387 2 7 7 / < < < < (1 DE D Fig 2. Logic symbol Fig 3. IEC logic symbol 74HC137 All information provided in this document is subject to legal disclaimers. NXP Semiconductors N.V. 2015. All rights reserved. Product data sheet Rev. 4 23 December 2015 2 of 19 ( DDE ( (5 (&2 &+(6 & /( * & DDE (&2 (5 &+(6 /(