SN74AXC4T245
SCES877A – DECEMBER 2018 – SRENV7IS4EADXJCUL4YT2204250
SCES877A – DECEMBER 2018 – REVISED JULY 2020
www.ti.com
SN74AXC4T245 Four-Bit Bus Transceiver with Configurable Voltage Translation
and Tri-State Outputs
The SN74AXC4T245 device is designed for
asynchronous communication between data buses.
1 Features
•
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 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 pullup resistor.
•
VCC Isolation Feature
– If Either VCC Input is Below 100 mV, All I/Os
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
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.
•
•
•
•
ESD Protection Exceeds JESD 22
– 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
•
•
•
•
•
•
Enterprise and Communications
Industrial
Personal Electronics
Wireless Infrastructure
Building Automation
Point of Sale
Device Information
PART NUMBER
SN74AXC4T245PW
SN74AXC4T245BQB
PACKAGE(1)
BODY SIZE (NOM)
TSSOP (16)
5.00 mm x 4.40 mm
WQFN (16)
2.50 mm x 3.50 mm
2.60 mm x 1.80 mm
3 Description
SN74AXC4T245RSV UQFN (16)
The SN74AXC4T245 is a four-bit noninverting 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
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.
Copyright © 2020 Texas Instruments Incorporated
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