Datasheet
SN74LVC8T245-Q1
www.ti.com
SCES815 –SEPTEMBER 2010
8-BIT DUAL-SUPPLY BUS TRANSCEIVER
WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-STATE OUTPUTS
Check for Samples: SN74LVC8T245-Q1
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FEATURES
DESCRIPTION
• Qualified for Automotive Applications
This 8-bit non-inverting bus transceiver uses two
separate configurable power-supply rails. The
• Control Inputs V
IH
/V
IL
Levels Are Referenced to
SN74LVC8T245-Q1 is optimized to operate with V
CCA
V
CCA
Voltage
and V
CCB
set at 1.65 V to 5.5 V. The A port is
• V
CC
Isolation Feature – If Either V
CC
Input Is at
designed to track V
CCA
. V
CCA
accepts any supply
GND, All Are in the High-Impedance State
voltage from 1.65 V to 5.5 V. The B port is designed
• Fully Configurable Dual-Rail Design Allows
to track V
CCB
. V
CCB
accepts any supply voltage from
Each Port to Operate Over the Full 1.65-V to
1.65 V to 5.5 V. This allows for universal low-voltage
bidirectional translation between any of the 1.8-V,
5.5-V Power-Supply Range
2.5-V, 3.3-V, and 5.5-V voltage nodes.
PW PACKAGE
The SN74LVC8T245-Q1 is designed for
(TOP VIEW)
asynchronous communication between two data
buses. The logic levels of the direction-control (DIR)
input and the output-enable (OE) input activate either
the B-port outputs or the A-port outputs or place both
output ports into the high-impedance mode. 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 is
always active and must have a logic HIGH or LOW
level applied to prevent excess I
CC
and I
CCZ
.
The SN74LVC8T245-Q1 is designed so that the
control pins (DIR and OE) are 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, all outputs are in the high-impedance
state.
To ensure the high-impedance state during power up
or power down, OE should be tied to V
CC
through a
pullup resistor; the minimum value of the resistor is
determined by the current-sinking capability of the
driver.
ORDERING INFORMATION
(1)
T
A
PACKAGE
(2)
ORDERABLE PART NUMBER TOP-SIDE MARKING
–40°C to 125°C TSSOP – PW Reel of 2000 SN74LVC8T245QPWRQ1 NH245Q
(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.
(2) Package drawings, thermal data, and symbolization are available at www.ti.com//packaging.
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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.