Datasheet

SN74LVC2T45-Q1
www.ti.com SCES818 –SEPTEMBER 2010
DUAL-BIT DUAL-SUPPLY BUS TRANSCEIVER
WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-STATE OUTPUTS
Check for Samples: SN74LVC2T45-Q1
1
FEATURES
• Qualified for Automotive Applications – 210 Mbps (Translate to 3.3 V)
• Fully Configurable Dual-Rail Design Allows – 140 Mbps (Translate to 2.5 V)
Each Port to Operate Over the Full 1.65-V to
– 75 Mbps (Translate to 1.8 V)
5.5-V Power-Supply Range
• V
CC
Isolation Feature – If Either V
CC
Input Is at
GND, Both Ports Are in the High-Impedance
State
• DIR Input Circuit Referenced to V
CCA
• Low Power Consumption, 10-mA Max I
CC
• ±24-mA Output Drive at 3.3 V
• I
off
Supports Partial-Power-Down Mode
Operation
• Max Data Rates
– 420 Mbps (3.3-V to 5-V Translation)
DESCRIPTION/ORDERING INFORMATION
This dual-bit noninverting bus transceiver uses two separate configurable power-supply rails. The A port is
designed to track V
CCA
. V
CCA
accepts any supply voltage from 1.65 V to 5.5 V. The B port is designed to track
V
CCB
. V
CCB
accepts any supply voltage from 1.65 V to 5.5 V. This allows for universal low-voltage bidirectional
translation between any of the 1.8-V, 2.5-V, 3.3-V, and 5-V voltage nodes.
The SN74LVC2T45-Q1 is designed for asynchronous communication between two data buses. The logic levels
of the direction-control (DIR) input activate either the B-port outputs or the A-port outputs. The device transmits
data from the A bus to the B bus when the B-port outputs are activated, and from the B bus to the A bus when
the A-port outputs are activated. The input circuitry on both A and B ports always is active and must have a logic
HIGH or LOW level applied to prevent excess I
CC
and I
CCZ
.
The SN74LVC2T45-Q1 is designed so that the DIR input circuit is supplied by V
CCA
.
This device is fully specified for partial-power-down applications using I
off
. The I
off
circuitry disables the outputs,
preventing damaging current backflow through the device when it is powered down.
The V
CC
isolation feature ensures that if either V
CC
input is at GND, both ports are in the high-impedance state.
NanoFree™ package technology is a major breakthrough in IC packaging concepts, using the die as the
package.
ORDERING INFORMATION
T
A
PACKAGE
(1)
ORDERABLE PART NUMBER TOP-SIDE MARKING
–40°C to 125°C VSSOP – DCU Reel of 3000 SN74LVC2T45QDCURQ1 CAWR
(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
website at www.ti.com.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Copyright © 2010, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.