74HCT257D,652

74HC257 74HCT257 Quad 2-input multiplexer 3-state Rev. 8 9 February 2021 Product data sheet 1. General description The 74HC257 74HCT257 is a quad 2-input multiplexer with 3-state outputs. Inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of V . CC 2. Features and benefits Wide supply voltage range from 2.0 V to 6.0 V CMOS low power dissipation High noise immunity Latch-up performance exceeds 100 mA per JESD 78 Class II Level B Complies with JEDEC standards: JESD8C (2.7 V to 3.6 V) JESD7A (2.0 V to 6.0 V) Non-inverting data path 3-state outputs interface directly with system bus Input levels: For 74HC257: CMOS level For 74HCT257: TTL level ESD protection: HBM JESD22-A114F exceeds 2000 V MM JESD22-A115-A exceeds 200 V Specified from -40 C to +85 C and from -40 C to +125 C 3. Ordering information Table 1. Ordering information Type number Package Temperature range Name Description Version 74HC257D -40 C to +125 C SO16 plastic small outline package 16 leads body width 3.9 mm SOT109-1 74HCT257D 74HC257PW -40 C to +125 C TSSOP16 plastic thin shrink small outline package 16 leads SOT403-1 body width 4.4 mm 74HCT257PWNexperia 74HC257 74HCT257 Quad 2-input multiplexer 3-state 4. Functional diagram 1 G1 15 EN 1 S 2 1I0 MUX 2 1 4 1Y 4 3 3 1I1 1 2I0 5 5 2Y 7 7 6 2I1 6 3I0 11 9 3Y 11 10 3I1 9 10 14 4I0 4Y 12 14 13 4I1 12 15 OE 13 mga835 001aad467 Fig. 1. Logic symbol Fig. 2. IEC logic symbol 2 3 5 6 11 10 14 13 1I0 1I1 2I0 2I1 3I0 3I1 4I0 4I1 1 S SELECTOR 15 OE 3-STATE MULTIPLEXER OUTPUTS 1Y 2Y 3Y 4Y 4 7 9 12 mgr280 Fig. 3. Functional diagram 74HC HCT257 All information provided in this document is subject to legal disclaimers. Nexperia B.V. 2021. All rights reserved Product data sheet Rev. 8 9 February 2021 2 / 15