SN74LVC8T245-Q1 Datasheet, PDF (1/14 Pages) Texas Instruments – 8-BIT DUAL-SUPPLY BUS TRANSCEIVER WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-STATE OUTPUTS

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
FEATURES
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• Qualified for Automotive Applications
• Control Inputs V_IH/V_IL Levels Are Referenced to
V_CCA Voltage
• V_CC Isolation Feature – If Either V_CC Input Is at
GND, All Are in the High-Impedance State
• Fully Configurable Dual-Rail Design Allows
Each Port to Operate Over the Full 1.65-V to
5.5-V Power-Supply Range
PW PACKAGE
(TOP VIEW)
DESCRIPTION
This 8-bit non-inverting bus transceiver uses two
separate configurable power-supply rails. The
SN74LVC8T245-Q1 is optimized to operate with V_CCA
and V_CCB set at 1.65 V to 5.5 V. 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 5.5-V voltage nodes.
The SN74LVC8T245-Q1 is designed for
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.
T_A
–40°C to 125°C
TSSOP – PW
ORDERING INFORMATION⁽¹⁾
PACKAGE ⁽²⁾
ORDERABLE PART NUMBER
Reel of 2000
SN74LVC8T245QPWRQ1
TOP-SIDE MARKING
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.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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