74CBTLV3257DS屬于集成電路（IC）的信號(hào)開關(guān)多路復(fù)用器解碼器。由安世半導(dǎo)體(中國(guó))有限公司制造生產(chǎn)的74CBTLV3257DS信號(hào)開關(guān)，多路復(fù)用器，解碼器邏輯型信號(hào)開關(guān)、多路復(fù)用器和編碼器 IC 可用于對(duì)以數(shù)字格式表示數(shù)據(jù)的電信號(hào)進(jìn)行路由和選擇。這些器件與設(shè)計(jì)用于模擬信號(hào)的類似產(chǎn)品有所不同，它們保留的信息表示為兩個(gè)電狀態(tài)之一，而不是兩個(gè)外部界限內(nèi)的無窮變化量。

1. General description

The 74CBTLV3257 provides a quad 1-of-2 high-speed multiplexer/demultiplexer with common

select (S) and output enable (OE) inputs. The low ON resistance of the switch allows inputs

to be connected to outputs without adding propagation delay or generating additional ground

bounce noise. When pin OE = LOW, one of the two switches is selected (low-impedance ON-state)

with pin S. When pin OE = HIGH, all switches are in the high-impedance OFF-state, independent

of pin S.

Schmitt trigger action at control input makes the circuit tolerant to slower input rise and fall times

across the entire VCC range from 2.3 V to 3.6 V.

To ensure the high-impedance OFF-state during power-up or power-down, OE should be tied

to the VCC through a pull-up resistor. The minimum value of the resistor is determined by the

current-sinking capability of the driver.

This device is fully specified for partial power-down applications using IOFF. The IOFF circuitry

disables the output, preventing the damaging backflow current through the device when it is

powered down.

2. Features and benefits

? Supply voltage range from 2.3 V to 3.6 V

? High noise immunity

? Complies with JEDEC standard:

? JESD8-5 (2.3 V to 2.7 V)

? JESD8-B/JESD36 (2.7 V to 3.6 V)

? ESD protection:

? HBM JESD22-A114F exceeds 2000 V

? MM JESD22-A115-A exceeds 200 V

? CDM AEC-Q100-011 revision B exceeds 1000 V

? 5 Ω switch connection between two ports

? Rail to rail switching on data I/O ports

? CMOS low power consumption

? Latch-up performance exceeds 250 mA per JESD78B Class I level A

? IOFF circuitry provides partial Power-down mode operation

? Multiple package options

? Specified from -40 °C to +85 °C and -40 °C to +125 °C