SN74CBT3345C中文資料具有 –2V 下沖保護(hù)的 5V、1:1 (SPST)、8 通道總線開關(guān)數(shù)據(jù)手冊(cè)TI規(guī)格書

描述 Description

The SN74CBT3345C is a high-speed TTL-compatible FET bus switch with low ON-state resistance (ron), allowing for minimal propagation delay. Active Undershoot-Protection Circuitry on the A and B ports of the SN74CBT3345C 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 SN74CBT3345C is organized as an 8-bit bus switch with two output-enable (OE, OE\\) inputs. When OE is high or OE\\ is low, the bus switch is ON, and the A port is connected to the B port, allowing bidirectional data flow between ports. When OE is low and OE\\ is high, the bus switch is OFF and the high-impedance state exists between the A and B ports.

This device is fully specified for partial-power-down applications using Ioff. The Ioff feature ensures that damaging current will not backflow through the device when it is powered down.

To ensure the high-impedance state during power up or power down, OE\\ should be tied to VCC through a pullup resistor and OE should be tied to GND through a pulldown resistor; the minimum value of the resistor is determined by the current-sinking/current-sourcing capability of the driver.

特性 Features

? Undershoot Protection for Off-Isolation on A and B Ports Up to –2 V
? Low ON-State Resistance (ron) Characteristics (ron = 3 Typical)
? Data and Control Inputs Provide Undershoot Clamp Diodes
? VCC Operating Range From 4 V to 5.5 V
? Control Inputs Can Be Driven by TTL or 5-V/3.3-V CMOS Outputs
? Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
? 2000-V Human-Body Model (A114-B, Class II)
? Supports Both Digital and Analog Applications: USB Interface, Memory Interleaving, Bus Isolation, Low-Distortion Signal Gating

簡(jiǎn)介

SN74CBT3345C屬于集成電路（IC）的信號(hào)開關(guān)多路復(fù)用器解碼器。由TI制造生產(chǎn)的SN74CBT3345C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(wú)窮變化量。