General description
The 74LVC257A is a quad 2-input multiplexer with 3-state outputs, which select 4 bits of data from two sources and are controlled by a common data select input (pin S). The data inputs from source 0 (pins 1I0 to 4I0) are selected when pin S is LOW and the data inputs from source 1 (pins 1I1 to 4I1) are selected when pin S is HIGH. Data appears at the outputs (pins 1Y to 4Y) in true (non-inverting) form from the selected inputs. The device is the logic implementation of a 4-pole, 2-position switch, where the position of the switch is determined by the logic levels applied to pin S. The outputs are forced to a high-impedance OFF-state when pin OE is HIGH.

FEATUREs and benefits
■ 5 V tolerant inputs/outputs, for interfacing with 5 V logic
■ Wide supply voltage range from 1.2 V to 3.6 V
■ CMOS low-power consumption
■ Direct interface with TTL levels
■ Output drive capability 50 Ω transmission lines at 85 °C
■ Complies with JEDEC standard:
    ◆ JESD8-7A (1.65 V to 1.95 V)
    ◆ JESD8-5A (2.3 V to 2.7 V)
    ◆ JESD8-C/JESD36 (2.7 V to 3.6 V)
■ ESD protection:
    ◆ HBM JESD22-A114F exceeds 2000 V
    ◆ MM JESD22-A115B exceeds 200 V
    ◆ CDM JESD22-C101E exceeds 1000 V
■ Specified from -40 °C to +85 °C and -40 °C to +125 °C