1. General description

The 74HC253; 74HCT253 is a dual 4-bit multiplexer, each with four binary inputs (nI0 to nI3), an

output enable input (nOE) and shared select inputs (S0 and S1). One of the four binary inputs is

selected by the select inputs and routed to the output nY. A HIGH on nOE causes the outputs to

assume a high-impedance OFF-state. 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

? Non-inverting data path

? 3-state outputs interface directly with system bus

? Common select inputs

? Separate output enable inputs

? Wide supply voltage range from 2.0 V to 6.0 V

? Input levels:

? For 74HC253: CMOS level

? For 74HCT253: TTL level

? 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)

? ESD protection:

? HBM JESD22-A114F exceeds 2 kV

? 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. Applications

? Data selectors

? Data multiplexers

74HCT253屬于集成電路（IC） > 信號開關(guān)，多路復用器，解碼器。安世半導體(中國)有限公司制造生產(chǎn)的74HCT253信號開關(guān)，多路復用器，解碼器邏輯型信號開關(guān)、多路復用器和編碼器 IC 可用于對以數(shù)字格式表示數(shù)據(jù)的電信號進行路由和選擇。這些器件與設計用于模擬信號的類似產(chǎn)品有所不同，它們保留的信息表示為兩個電狀態(tài)之一，而不是兩個外部界限內(nèi)的無窮變化量。