74HC253 74HCT253 Dual 4-input multiplexer 3-state Rev. 5 21 January 2015 Product data sheet 1. General description The 74HC253 74HCT253 are high-speed Si-gate CMOS devices and are pin compatible with Low-power Schottky TTL (LSTTL). The 74HC253 74HCT253 provides a dual 4-input multiplexer with 3-state outputs which selects 2 bits of data from up to four sources selected by common data select inputs (S0, S1). The two 4-input multiplexer circuits have individual active LOW output enable inputs (1OE, 2OE). The 74HC253 and 74HCT253 are the logic implementation of a 2-pole, 4-position switch, where the position of the switch is determined by the logic levels applied to S0 and S1. The outputs are forced to a high-impedance OFF-state when nOE is HIGH. The logic equations for the outputs are: 1Y = 1OE 1I0 S1 S0++1I1 S1 S0+1I2 S1 S0 1I3 S1 S0 2Y = 2OE 2I0 S1 S0++2I1 S1 S0+2I2 S1 S0 2I3 S1 S0 2. Features and benefits Non-inverting data path 3-state outputs interface directly with system bus Complies with JEDEC standard no. 7A Common select inputs Separate output enable inputs Input levels: For 74HC253: CMOS level For 74HCT253: TTL level ESD protection: HBM JESD22-A114F exceeds 2000 V MM JESD22-A115-A exceeds 200 V Multiple package options Specified from 40 Cto+85 C and from 40 Cto+125 C74HC253 74HCT253 NXP Semiconductors Dual 4-input multiplexer 3-state 3. Applications Data selectors Data multiplexers 4. Ordering information Table 1. Ordering information Type number Package Temperature range Name Description Version 74HC253N 40 C to +125 C DIP16 plastic dual in-line package 16 leads (300 mil) SOT38-4 74HCT253N 74HC253D 40 C to +125 C SO16 plastic small outline package 16 leads body width SOT109-1 3.9 mm 74HCT253D 74HC253DB 40 C to +125 C SSOP16 plastic shrink small outline package 16 leads SOT338-1 body width 5.3 mm 74HCT253DB 5. Functional diagram 2( , , < , , 6 6 , , , , , , 6 , 6 < , ( , ( < 2( DD O DO D Fig 1. Logic symbol Fig 2. Functional diagram 74HC HCT253 All information provided in this document is subject to legal disclaimers. NXP Semiconductors N.V. 2015. All rights reserved. Product data sheet Rev. 5 21 January 2015 2 of 17 < 2 2 08 , , , 08