SN74CB3T3306_16 Datasheet, PDF (1/19 Pages) Texas Instruments – Dual FET Bus 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
•1 Output Voltage Translation Tracks V_CC
• Supports Mixed-Mode Signal Operation on All
Data I/O Ports
– 5-V Input Down to 3.3-V Output Level Shift
With 3.3-V V_CC
– 5-V/3.3-V Input Down to 2.5-V Output Level
Shift With 2.5-V V_CC
• 5-V Tolerant I/Os With Device Powered Up or
Powered Down
• Bidirectional Data Flow With Near-Zero
Propagation Delay
• Low ON-State Resistance (r_on) Characteristics (r_on
= 5 Ω Typical)
• Low Input/Output Capacitance Minimizes Loading
(C_io(OFF) = 4.5 pF Typical)
• Data and Control Inputs Provide Undershoot
Clamp Diodes
• Low Power Consumption (I_CC = 20 μA Maximum)
• V_CC 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 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
2 Applications
• Supports Digital Applications:
– Level Translation
– PCI Interface
– USB Interface
– Memory Interleaving
– Bus Isolation
3 Description
The SN74CB3T3306 device is a high-speed TTL-
compatible FET bus switch with low ON-state
resistance (r_on), allowing for minimal propagation
delay. The device fully supports mixed-mode signal
operation on all data I/O ports by providing voltage
translation that tracks V_CC. The SN74CB3T3306
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).
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
SN74CB3T3306DCT SSOP (8)
2.95 mm × 2.80 mm
SN74CB3T3306DCU VSSOP (8)
2.30 mm × 2.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Block Diagram
A
B
V_G(1)
Control
Circuit
EN⁽²⁾
(1) Gate voltage (V_G) is approximately equal to V_CC + V_T when the switch is ON
and V_I > V_CC + V_T.
(2) EN is the internal enable signal applied to the switch.
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.