SN74AXC4T245-Q1
SCES905E – JULY 2019 – REVISED DECEMBER 2021
SN74AXC4T245-Q1 Automotive 4-Bit Dual-Supply Bus Transceiver With Configurable
Voltage Translation and Tri-State Outputs
The SN74AXC4T245-Q1 device is designed for
asynchronous communication between data buses.
1 Features
•
•
•
AEC-Q100 qualified for automotive applications
Available in wettable flank QFN (WBQB) package
Fully-configurable dual-rail design allows each port
to operate with a power supply range from 0.65 V
to 3.6 V
Operating temperature from –40°C to +125°C
Multiple direction control pins to allow
simultaneous up and down translation
Glitch-free power supply sequencing
Up to 380 Mbps support when translating from 1.8
V to 3.3 V
The device transmits data from the A bus to the B bus
or from the B bus to the A bus, depending on the logic
level of the direction-control inputs (1DIR and 2DIR).
The output-enable inputs (1 OE and 2 OE) are used
to disable the outputs so the buses are effectively
isolated. The SN74AXC4T245-Q1 device is designed
so the control pins (xDIR and x OE) are referenced to
•
•
VCCA
.
•
•
To ensure the high-impedance state of the level shifter
I/Os during power up or power down, the x OE pins
should be tied to VCCA through a pull-up resistor.
•
VCC isolation feature:
This device is fully specified for partial-power-down
applications using the Ioff current. The Ioff protection
circuitry ensures that no excessive current is drawn
from or to an input, output, or combined I/O that
is biased to a specific voltage while the device is
powered down.
– If either VCC input is below 100 mV, all
I/O outputs are disabled and become high
impedance
Ioff supports partial-power-down mode operation
Compatible with AVC-family level shifters
Latch-up performance exceeds 100 mA per JESD
78, class II
ESD protection exceeds JEDEC JS-001
– 8000-V human-body model
– 1000-V charged-device model
•
•
•
The VCC isolation feature ensures that if either VCCA
or VCCB is less than 100 mV, both I/O ports enter a
high-impedance state by disabling their outputs.
•
Glitch-Free power supply sequencing allows either
supply rail to be powered on or off in any order while
providing robust power sequencing performance.
2 Applications
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•
•
•
Infotainment head unit
ADAS fusion
ADAS front camera
Hybrid electric vehicles and electric vehicles
battery management system
Telematics control unit
Device Information
PART NUMBER
SN74AXC4T245PW-Q1
SN74AXC4T245BQB-Q1
PACKAGE(1) BODY SIZE (NOM)
TSSOP (16)
WQFN (16)
5.00 mm × 4.40 mm
2.50 mm × 3.50 mm
2.50 mm × 3.50 mm
2.60 mm × 1.80 mm
•
SN74AXC4T245WBQB-Q1 WQFN (16)
SN74AXC4T245RSV-Q1 UQFN (16)
3 Description
The SN74AXC4T245-Q1 AEC-Q100 qualified device
is a four-bit non-inverting bus transceiver that uses
two individually configurable power-supply rails. The
device is operational with both VCCA and VCCB
supplies as low as 0.65 V. The A port is designed
to track VCCA, which accepts any supply voltage from
0.65 V to 3.6 V. The B port is designed to track
VCCB, which also accepts any supply voltage from
0.65 V to 3.6 V. Additionally the SN74AXC4T245-Q1
is compatible with a single-supply system.
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
One of Two Transceiver Pairs
VCCA
VCCB
xDIR
xOE
xB1
xB2
xA1
xA2
Functional Block Diagram
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.
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