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SN74AVC8T245RHLR датащи(PDF) 1 Page - Texas Instruments

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номер детали SN74AVC8T245RHLR
подробное описание детали  8-Bit Dual-Supply Bus Transceiver With Configurable Voltage Translation and 3-State Outputs
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производитель  TI1 [Texas Instruments]
домашняя страница  http://www.ti.com
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SN74AVC8T245RHLR датащи(HTML) 1 Page - Texas Instruments

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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.
SN74AVC8T245
SCES517J – DECEMBER 2003 – REVISED MARCH 2017
SN74AVC8T245 8-Bit Dual-Supply Bus Transceiver With Configurable Voltage Translation
and 3-State Outputs
1
1 Features
1
Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
ESD Protection Exceeds JESD 22
8000-V Human-Body Model (A114-A)
200-V Machine Model (A115-A)
1000-V Charged-Device Model (C101)
Control Inputs VIH/VIL Levels Are Referenced to
VCCA Voltage
VCC Isolation Feature – If Either VCC Input Is at
GND, All I/O Ports Are in the High-Impedance
State
Ioff Supports Partial Power-Down Mode Operation
Fully Configurable Dual-Rail Design Allows Each
Port to Operate Over the Full 1.4-V to 3.6-V
Power-Supply Range
I/Os Are 4.6-V Tolerant
Maximum Data Rates
170 Mbps (VCCA < 1.8 V or VCCB < 1.8 V)
320 Mbps (VCCA ≥ 1.8 V and VCCB ≥ 1.8 V)
2 Applications
Personal Electronic
Industrial
Enterprise
Telecom
Logic Diagram (Positive Logic)
3 Description
This 8-bit noninverting bus transceiver uses two
separate
configurable
power-supply
rails.
The
SN74AVC8T245
is
optimized
to
operate
with
VCCA/VCCB set at 1.4 V to 3.6 V. The device is
operational with VCCA/VCCB as low as 1.2 V. The A
port is designed to track VCCA. VCCA accepts any
supply voltage from 1.2 V to 3.6 V. The B port is
designed to track VCCB. VCCB accepts any supply
voltage from 1.2 V to 3.6 V. This allows for universal
low-voltage bidirectional translation between any of
the 1.2-V, 1.5-V, 1.8-V, 2.5-V, and 3.3-V voltage
nodes.
The SN74AVC8T245 is designed for asynchronous
communication between data buses. 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
at the direction-control (DIR) input. The output-enable
(OE) input can be used to disable the outputs so the
buses are effectively isolated.
The SN74AVC8T245 is designed so that the control
pins (DIR and OE) are supplied by VCCA.
The SN74AVC8T245 solution is compatible with a
single-supply system and can be replaced later with a
'245 function, with minimal printed circuit board
redesign.
This device is fully specified for partial-power-down
applications using Ioff. The Ioff circuitry disables the
outputs, thus preventing damaging current backflow
through the device when it is powered down.
The VCC isolation feature ensures that if either VCC
input is at GND, both ports are in the high-impedance
state.
To ensure the high-impedance state during power up
or power down, OE shall be tied to VCC through a
pullup resistor; the minimum value of the resistor is
determined by the current-sinking capability of the
driver.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
SN74AVC8T245
VQFN (24)
3.50 mm x 5.50 mm
TSSOP (24)
4.40 mm x 7.80 mm
TVSOP (24)
4.40 mm x 5.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.


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