74HCT138N,652

74HC138; 74HCT138 3-to-8 line decoder/demultiplexer; inverting Rev. 5 — 26 January 2015 Product data sheet 1. General description The 74HC138; 74HCT138 decodes three binary weighted address inputs (A0, A1 and A2) to eight mutually exclusive outputs (Y0 to Y7). The device features three enable inputs (E1, E2 and E3). Every output will be HIGH unless E1 and E2 are LOW and E3 is HIGH. This multiple enable function allows easy parallel expansion to a 1-of-32 (5 to 32 lines) decoder with just four ‘138’ ICs and one inverter. The ‘138’ can be used as an eight output demultiplexer by using one of the active LOW enable inputs as the data input and the remaining enable inputs as strobes. Inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of VCC. 2. Features and benefits  Complies with JEDEC standard no. 7A  Input levels:  For 74HC138: CMOS level  For 74HCT138: TTL level  Demultiplexing capability  Multiple input enable for easy expansion  Ideal for memory chip select decoding  Active LOW mutually exclusive outputs  ESD protection:  HBM JESD22-A114F exceeds 2000 V  MM JESD22-A115-A exceeds 200 V  Multiple package options  Specified from 40 C to +85 C and from 40 C to +125 C 3. Ordering information Table 1. Ordering information Type number 74HC138N Package Temperature range Name Description Version 40 C to +125 C DIP16 plastic dual in-line package; 16 leads (300 mil) SOT38-4 40 C to +125 C SO16 plastic small outline package; 16 leads; body width 3.9 mm SOT109-1 40 C to +125 C SSOP16 plastic shrink small outline package; 16 leads; body width 5.3 mm SOT338-1 74HCT138N 74HC138D 74 HCT138D 74HC138DB 74HCT138DB 74HC138; 74HCT138 NXP Semiconductors 3-to-8 line decoder/demultiplexer; inverting Table 1. Ordering information …continued Type number Package 74HC138PW Temperature range Name Description Version 40 C to +125 C TSSOP16 plastic thin shrink small outline package; 16 leads; body width 4.4 mm SOT403-1 40 C to +125 C DHVQFN16 plastic dual in-line compatible thermal enhanced SOT763-1 very thin quad flat package; no leads; 16 terminals; body 2.5  3.5  0.85 mm 74HCT138PW 74HC138BQ 74HCT138BQ 4. Functional diagram