SN74AVC8T245_17 Datasheet, PDF (1/31 Pages) Texas Instruments – 8-Bit Dual-Supply Bus Transceiver With Configurable Voltage Translation and 3-State Outputs

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SN74AVC8T245
SCES517J – DECEMBER 2003 – REVISED MARCH 2017
SN74AVC8T245 8-Bit Dual-Supply Bus Transceiver With Configurable Voltage Translation
and 3-State Outputs
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 V_IH/V_IL Levels Are Referenced to
V_CCA Voltage
• V_CC Isolation Feature – If Either V_CC Input Is at
GND, All I/O Ports Are in the High-Impedance
State
• I_off 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 (V_CCA < 1.8 V or V_CCB < 1.8 V)
– 320 Mbps (V_CCA ≥ 1.8 V and V_CCB ≥ 1.8 V)
2 Applications
• Personal Electronic
• Industrial
• Enterprise
• Telecom
Logic Diagram (Positive Logic)
2
DIR
22
OE
3
A1
21
B1
To Seven Other Channels
3 Description
This 8-bit noninverting bus transceiver uses two
separate configurable power-supply rails. The
SN74AVC8T245 is optimized to operate with
V_CCA/V_CCB set at 1.4 V to 3.6 V. The device is
operational with V_CCA/V_CCB as low as 1.2 V. The A
port is designed to track V_CCA. V_CCA accepts any
supply voltage from 1.2 V to 3.6 V. The B port is
designed to track V_CCB. V_CCB 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 V_CCA.
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 I_off. The I_off circuitry disables the
outputs, thus 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, 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 V_CC 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)
VQFN (24)
3.50 mm x 5.50 mm
SN74AVC8T245
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.
1
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.