SN74AVC4T245-Q1 Datasheet, PDF (1/16 Pages) Texas Instruments – 4-BIT DUAL-SUPPLY BUS TRANSCEIVER WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-STATE OUTPUTS

SN74AVC4T245-Q1
www.ti.com
SCES792 – NOVEMBER 2009
4-BIT DUAL-SUPPLY BUS TRANSCEIVER
WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-STATE OUTPUTS
Check for Samples: SN74AVC4T245-Q1
FEATURES
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• Qualified for Automotive Applications
• Control Inputs V_IH/V_IL Levels Are Referenced to
V_CCA Voltage
• Fully Configurable Dual-Rail Design Allows
Each Port to Operate Over the Full 1.2-V to
3.6-V Power-Supply Range
• I/Os Are 4.6-V Tolerant
• I_off Supports Partial Power-Down-Mode
Operation
• Maximum Data Rates
– 380 Mbps (1.8-V to 3.3-V Translation)
– 200 Mbps (<1.8-V to 3.3-V Translation)
– 200 Mbps (Translate to 2.5 V or 1.8 V)
– 150 Mbps (Translate to 1.5 V)
– 100 Mbps (Translate to 1.2 V)
• Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
• ESD Protection Exceeds JESD 22
– 8000-V Human-Body Model (A114-A)
– 1000-V Charged-Device Model (C101)
RGY PACKAGE
(TOP VIEW)
1DIR 2
2DIR 3
1A1 4
1A2 5
2A1 6
2A2 7
1
16
Exposed
Center
Pad
8
9
15 1OE
14 2OE
13 _1B1
12 _1B2
11 2B1
10 2B2
The exposed center pad, if used, must be connected
only as a secondary GND or must be left electrically open.
DESCRIPTION/ORDERING INFORMATION
This 4-bit noninverting bus transceiver uses two separate configurable power-supply rails. 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. The SN74AVC4T245 is optimized to operate with V_CCA/V_CCB set
at 1.4 V to 3.6 V. It is operational with V_CCA/V_CCB as low as 1.2 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 SN74AVC4T245 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 SN74AVC4T245 is designed so that the control pins (1DIR, 2DIR, 1OE, and 2OE) 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, then both ports 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.
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
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.
Copyright © 2009, Texas Instruments Incorporated