Datasheet > U74CB3Q324

U74CB3Q324

更新时间： 2023-12-06 20:09:55

品牌	Logo	应用领域
友顺 - UTC		/
页数	文件大小	规格书
6页	188K
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2.3

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数据手册

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U74CB3Q324 数据手册

UNISONIC TECHNOLOGIES CO., LTD

U74CB3Q3245

Advance

CMOS IC

8-BIT FET BUS SWITCH

2.5V-/3.3V LOW-VOLTAGE

HIGH BANDWIDTH BUS

SWITCH



DESCRIPTION

TSSOP-20

The U74CB3Q3245 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 (R_ON). 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 UTC

U74CB3Q3245 provides an optimized interface solution ideally

suited for broadband communications, networking, and

data-intensive computing systems.

The UTC U74CB3Q3245 is organized as an 8-bit bus switch with

a single output-enable(

) input. When

is low, the bus switch

is ON and the A port is connected to the B port, allowing

bidirectional data flow between ports. When 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 I_OFF. The I_OFFcircuitry 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,

should be tied to V_CCthrough a pull up resistor; the

minimum value of the resistor is determined by the current-sinking

capability of the driver.



FEATURES

* High-Bandwidth Data Path(up to 500MHz)

* 5V Tolerant I/Os With Device Powered Up or Powered

Down

* Data and Control Inputs Provide Undershoot Clamp

Diodes

* Low Power Consumption (I_CC=1mA Typical)

* Low and Flat ON-State Resistance (R_ON) Characteristics * V_CCOperating Range From 2.3V to 3.6V

Over Operating Range (R_ON=4Ω Typ.)

* Rail-to-Rail Switching on Data I/O Ports

–0 to 5V Switching With 3.3V V_CC

–0 to 3.3V Switching With 2.5V V_CC

* Bidirectional Data Flow With Near-Zero Propagation

Delay

* Low Input / Output Capacitance Minimizes Loading and

Signal Distortion(C_io(OFF)=3.5pF Typ.)

* Fast Switching Frequency (f_OE=20MHz Max.)

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

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

* Control Inputs Can Be Driven by TTL or 5V/3.3V CMOS

Outputs

* I_OFFSupports Partial-Power-Down Mode Operation

* Supports Both Digital and Analog Applications:

PCI Interface, Differential Signal Interface, Memory

Interleaving, Bus Isolation, Low-Distortion Signal Gating

www.unisonic.com.tw

1 of 6

QW-R502-D32.b

12 3 4 5 6

中文翻译

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