SN74CB3Q3305 - 双路 FET 2.5V/3.3V 低电压高带宽总线开关

SN74CB3Q3305是TI德州仪器公司的一款数字开关产品，SN74CB3Q3305是双路 FET 2.5V/3.3V 低电压高带宽总线开关，本站介绍了SN74CB3Q3305的封装应用图解、特点和优点、功能等，并给出了与SN74CB3Q3305相关的TI元器件型号供参考。

SN74CB3Q3305 - 双路 FET 2.5V/3.3V 低电压高带宽总线开关 - 数字开关 - 信号开关 - 德州仪器

产品特性

High-Bandwidth Data Path (Up to 500 MHz(1))
5-V Tolerant I/Os With Device Powered Up or Powered Down
Low and Flat ON-State Resistance (ron) Characteristics Over Operating Range (ron = 3 Ω Typical)
Rail-to-Rail Switching on Data I/O Ports
- 0- to 5-V Switching With 3.3-V VCC
- 0- to 3.3-V Switching With 2.5-V VCC
Bidirectional Data Flow With Near-Zero Propagation Delay
Low Input/Output Capacitance Minimizes Loading and Signal Distortion (Cio(OFF) = 3.5 pF Typical)
Fast Switching Frequency (fOE = 20 MHz Maximum)
Data and Control Inputs Provide Undershoot Clamp Diodes
Low Power Consumption (ICC= 0.25 mA Typical)
VCC Operating Range From 2.3 V to 3.6 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 (1)

(1) 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, SCDA008.

产品应用

IP Phones: Wired and Wireless
Optical Modules
Optical Networking: Video Over Fiber and EPON
Private Branch Exchange (PBX)
WiMAX and Wireless Infrastructure Equipment
USB, Differential Signal interface
Bus isolation

产品说明

The SN74CB3Q3305 device is a high-bandwidth FET bus switch using 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 SN74CB3Q3305 device provides an optimized interface solution ideally suited for broadband communications, networking, and data-intensive computing systems.

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 GND through a pulldown resistor; the minimum value of the resistor is determined by the current-sourcing capability of the driver.

产品器件信息

PART NUMBER	PACKAGE	BODY SIZE (NOM)
SN74CB3Q3305	VSSOP (8)	2.00 mm × 3.10 mm
SN74CB3Q3305	TSSOP (8)	3.00 mm × 6.10 mm

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