SN74CBT6800C - 具有带电插入预充电输出和 -2V 下冲保护的 10 位 FET 总线开关

SN74CBT6800C是TI德州仪器公司的一款数字开关产品，SN74CBT6800C是具有带电插入预充电输出和 -2V 下冲保护的 10 位 FET 总线开关，本站介绍了SN74CBT6800C的封装应用图解、特点和优点、功能等，并给出了与SN74CBT6800C相关的TI元器件型号供参考。

SN74CBT6800C - 具有带电插入预充电输出和 -2V 下冲保护的 10 位 FET 总线开关 - 数字开关 - 信号开关 - 德州仪器

产品描述

The SN74CBT6800C 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 SN74CBT6800C 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 device also precharges the B port to a user-selectable bias voltage (BIASV) to minimize live-insertion noise.

The SN74CBT6800C is a 10-bit bus switch with a single output-enable (ON\) input. When ON\ is low, the 10-bit bus switch is ON, and the A port is connected to the B port, allowing bidirectional data flow between ports. When ON\ is high, the 10-bit bus switch is OFF, and a high-impedance state exists between the A and B ports. The B port is precharged to BIASV through the equivalent of a 10-k resistor when ON\ is high, or if the device is powered down (VCC = 0 V).

During insertion (or removal) of a card into (or from) an active bus, the card’s output voltage may be close to GND. When the connector pins make contact, the card’s parasitic capacitance tries to force the bus signal to GND, creating a possible glitch on the active bus. This glitching effect can be reduced by using a bus switch with precharged bias voltage (BIASV) of the bus switch equal to the input threshold voltage level of the receivers on the active bus. This method will ensure that any glitch produced by insertion (or removal) of the card will not cross the input threshold region of the receivers on the active bus, minimizing the effects of live-insertion noise.

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. The device has isolation during power off.

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

产品特性

Member of the Texas Instruments Widebus™ Family
Undershoot Protection for Off-Isolation on A and B Ports Up to .2 V
B-Port Outputs Are Precharged by Bias Voltage (BIASV) to Minimize Signal Distortion During Live Insertion and Hot-Plugging
Supports PCI Hot Plug
Bidirectional Data Flow, With Near-Zero Propagation Delay
Low ON-State Resistance (ron) Characteristics (ron = 3 Typical)
Low Input/Output Capacitance Minimizes Loading and Signal Distortion (Cio(OFF) = 5.5 pF Typical)
Data and Control Inputs Provide Undershoot Clamp Diodes
Low Power Consumption (ICC = 3 µA Max)
VCC Operating Range From 4 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: PCI Interface, Memory Interleaving, Bus Isolation, Low-Distortion Signal Gating

Widebus is a trademark of Texas Instruments.

下面可能是您感兴趣的TI德州仪器公司数字开关元器件

TI公司产品现货专家，订购TI公司产品不限最低起订量，TI芯片大陆现货即时发货，香港库存3-5天发货，海外库存7-10天发货

寻找全球TI代理商现货货源 - TI公司（德州仪器）电子元件在线订购