SN74CB3Q3345中文资料具有 2 个控制输入的 3.3V、1:1 (SPST)、8 通道 FET 总线开关数据手册TI规格书

描述 Description

The SN74CB3Q3345 is a high-bandwidth FET bus switch utilizing a charge pump to elevate the gate voltage of the pass transistor, providing a low and flat ON-state resistance (ron). The low and flat ON-state resistance allows for minimal propagation delay and supports rail-to-rail switching on the data input/output (I/O) ports. The device also features low data I/O capacitance to minimize capacitive loading and signal distortion on the data bus. Specifically designed to support high-bandwidth applications, the SN74CB3Q3345 provides an optimized interface solution ideally suited for broadband communications, networking, and data-intensive computing systems. The SN74CB3Q3384A 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 a high-impedance state exists between the A and B ports.This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry prevents damaging current backflow through the device when it is powered down. The device has isolation during power off. 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

• High-Bandwidth Data Path (up to 500 MHz)
• Low and Flat ON-State Resistance (ron) Characteristics Over Operating Range (ron = 4 Typ)
• 0- to 5-V Switching With 3.3-V VCC
• Bidirectional Data Flow With Near-Zero Propagation Delay
• Fast Switching Frequency (fOE = 20 MHz Max)
• Low Power Consumption (ICC = 0.7 mA Typ)
• 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)
• Ioff Supports Partial-Power-Down Mode Operation
• ESD Performance Tested Per JESD 22
• 1000-V Charged-Device Model (C101)
• Supports Both Digital and Analog Applications: Differential Signal Interface, Memory Interleaving, Bus Isolation, Low-Distortion Signal Gating
For additional information regarding the performance characteristics of the CB3Q family, refer to the TI application report, CBT-C, CB3T, and CB3Q Signal-Switch Families, literature number SCDA008.)

简介

SN74CB3Q3345属于集成电路（IC）的信号开关多路复用器解码器。由TI制造生产的SN74CB3Q3345信号开关，多路复用器，解码器逻辑型信号开关、多路复用器和编码器 IC 可用于对以数字格式表示数据的电信号进行路由和选择。这些器件与设计用于模拟信号的类似产品有所不同，它们保留的信息表示为两个电状态之一，而不是两个外部界限内的无穷变化量。