SN74CBTD3305C屬于集成電路（IC）的信號(hào)開關(guān)多路復(fù)用器解碼器。由美國德州儀器公司制造生產(chǎn)的SN74CBTD3305C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。

Undershoot Protection for Off-Isolation on

A and B Ports Up To ?2 V

Integrated Diode to VCC Provides 5-V Input

Down To 3.3-V Output Level Shift

Bidirectional Data Flow, With Near-Zero

Propagation Delay

Low ON-State Resistance (ron)

Characteristics (ron = 3 Ω Typical)

Low Input/Output Capacitance Minimizes

Loading and Signal Distortion

(Cio(OFF) = 5 pF Typical)

Data and Control Inputs Provide

Undershoot Clamp Diodes

VCC Operating Range From 4.5 V to 5.5 V

Data I/Os Support 0 to 5-V Signaling Levels

(0.8-V, 1.2-V, 1.5-V, 1.8-V, 2.5-V, 3.3-V, 5-V)

Control Inputs Can be Driven by TTL or

5-V/3.3-V CMOS Outputs

Ioff Supports Partial-Power-Down Mode

Operation

Latch-Up Performance Exceeds 100 mA Per

JESD 78, Class II

ESD Performance Tested Per JESD 22

? 2000-V Human-Body Model

(A114-B, Class II)

? 1000-V Charged-Device Model (C101)

Supports Both Digital and Analog

Applications: USB Interface, Memory

Interleaving, Bus Isolation, Low-Distortion

Signal Gating

description/ordering information

The SN74CBTD3305C is a high-speed TTL-compatible FET bus switch with low ON-state resistance (ron),

allowing for minimal propagation delay. This device features an integrated diode in series with VCC to provide

level shifting for 5-V input down to 3.3-V output levels. Active Undershoot-Protection Circuitry on the A and B

ports of the SN74CBTD3305C provides protection for undershoot up to ?2 V by sensing an undershoot event

and ensuring that the switch remains in the proper OFF state.

The SN74CBTD3305C is organized as two 1-bit bus switches with separate output-enable (1OE, 2OE) inputs.

It can be used as two 1-bit bus switches or as one 2-bit bus switch. When OE is high, the associated 1-bit bus

switch is ON, and the A port is connected to the B port, allowing bidirectional data flow between ports. When

OE is low, the associated 1-bit bus switch is OFF, and a high-impedance state exists between the A and B ports.