SN74CB3Q3305

Features:

•High-Bandwidth Data Path(up to 500MHz⁽¹⁾)
•5-V Tolerant I/Os With Device Powered Up or Powered Down
•Low and Flat ON-State Resistance  (r_on) Characteristics Over Operating Range (r_on=3Ω Typ)
•Rail-to-Rail Switching on Data I/O Ports
0-to 5-V Switching With 3.3-V V_CC
0- to 3.3-V Switching With 2.5-VV_CC
•Bidirectional Data Flow With Near-Zero Propagation Delay
•Low Input/Output Capacitance Minimizes Loading and Signal Distortion(C_io(OFF)= 3.5 pF T_yp)
•Fast Switching Frequency (f_OE =20 MHz Max)
` Data and Control Inputs Provide Undershoot Clamp Diodes
` Low Power Consumption (ICC = 0.25 mA Typ)
` 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
` I_off 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: USB Interface, Differential Signal Interface, Bus Isolation, Low-Distortion Signal Gating

Application

Audio
Automotive
Broadband
Digital Control
Military
Optical Networking
Security
Telephony
Video & Imaging
Wireless


Pinout




Specifications

			MIN	MAX	UNIT
VCC	Supply voltage range		0.5	4.6	V
VIN	Control input voltage range(2) (3)		0.5	7	V
VI/O	Switch I/O voltage range(2) (3) (4)		0.5	7	V
IIK	Control input clamp current	VIN < 0		50	mA
II/OK	I/O port clamp current	VI/O < 0		50	mA
II/O	ON-state switch current(5)			±64	mA
	Continuous current through VCC or GND			±100	mA
qJA	Package thermal impedance(6)			88	°C/W
	Tstg Storage temperature range		65	150	°C

Description

   The SN74CB3Q3305 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 SN74CB3Q3305 provides an optimized interface solution ideally suited for broadband communications, networking, and data-intensive computing
systems.

   The SN74CB3Q3305 is organized as two 1-bit switches with separate output-enable (1OE, 2OE) inputs. It can be used as two 1-bit bus switches or as one 2-bit bus switch. When OE is high, the associated 1-bit bus switch is ON and the A port is connected to the B port, allowing bidirectional data flow between ports. When OE is low, the associated 1-bit 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 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 of the SN74CB3Q3305 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.