A

B

Control

Circuit

(2) EN is the internal enable signal applied to the switch.

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SN74CB3T3306

SCDS119C – JANUARY 2003 – REVISED DECEMBER 2015

SN74CB3T3306 Dual FET Bus Switch 2.5-V/3.3-V Low-Voltage Bus Switch

With 5-V Tolerant Level Shifter

1 Features

2 Applications

1

•

•

Supports Digital Applications:

•

Supports Mixed-Mode Signal Operation on All

–

Level Translation

Data I/O Ports

–

PCI Interface

–

5-V Input Down to 3.3-V Output Level Shift

–

USB Interface

–

Memory Interleaving

–

5-V/3.3-V Input Down to 2.5-V Output Level

–

Bus Isolation

•

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

3 Description

Powered Down

The SN74CB3T3306 device is a high-speed TTL-

•

Bidirectional Data Flow With Near-Zero

compatible

FET

bus

switch

with

low

ON-state

Propagation Delay

delay. The device fully supports mixed-mode signal

•

operation on all data I/O ports by providing voltage

= 5

Ω Typical)

•

Low Input/Output Capacitance Minimizes Loading

device supports systems using 5-V TTL, 3.3-V

LVTTL, and 2.5-V CMOS switching standards, as well

as user-defined switching levels (see Figure 5).

•

Data and Control Inputs Provide Undershoot

Clamp Diodes

Device Information(1)

•

PART NUMBER

PACKAGE

BODY SIZE (NOM)

•

SN74CB3T3306DCT

SSOP (8)

2.95 mm × 2.80 mm

•

Data I/Os Support 0- to 5-V Signaling Levels (0.8

SN74CB3T3306DCU

VSSOP (8)

2.30 mm × 2.00 mm

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

(1) For all available packages, see the orderable addendum at

•

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

the end of the data sheet.

CMOS Outputs

•

Block Diagram

•

Latch-Up Performance Exceeds 250 mA Per

JESD 17

•

ESD Performance Tested Per JESD 22

–

2000-V Human Body Model (A114-B, Class II)

–

1000-V Charged-Device Model (C101)

•

Supports Digital Applications:

–

Level Translation

–

USB Interface

–

Bus Isolation

•

Ideal for Low-Power Portable Equipment

1

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.