SN74AVCAH164245_09 Datasheet, PDF (1/18 Pages) Texas Instruments – 16-BIT DUAL-SUPPLY BUS TRANSCEIVER WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-STATE OUTPUTS

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SN74AVCAH164245
16-BIT DUAL-SUPPLY BUS TRANSCEIVER
WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-STATE OUTPUTS
SCES396A – JULY 2002 – REVISED JUNE 2005
FEATURES
• Member of the Texas Instruments Widebus™
Family
• DOC™ Circuitry Dynamically Changes Output
Impedance, Resulting in Noise Reduction
Without Speed Degradation
• Dynamic Drive Capability Is Equivalent to
Standard Outputs With I_OH and I_OL of ±24 mA
at 2.5-V V_CC
• Control Inputs V_IH/V_IL Levels Are Referenced
to V_CCA Voltage
• If Either V_CC Input Is at GND, Both Ports Are in
the High-Impedance State
• Overvoltage-Tolerant Inputs/Outputs Allow
Mixed-Voltage-Mode Data Communications
• 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
• Bus Hold on Data Inputs Eliminates the Need
for External Pullup/Pulldown Resistors
• Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
• ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
– 1000-V Charged-Device Model (C101)
DESCRIPTION/ORDERING INFORMATION
This 16-bit (dual-octal) 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 1.4 V to 3.6 V. The B port is designed to
track V_CCB. V_CCB accepts any supply voltage from 1.4 V to 3.6 V. This allows for universal low-voltage
bidirectional translation between any of the 1.5-V, 1.8-V, 2.5-V, and 3.3-V voltage nodes.
The SN74AVCAH164245 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 SN74AVCAH164245 is designed so that the control pins (1DIR, 2DIR, 1OE, and 2OE) are supplied by V_CCA.
Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level. Use of pullup or
pulldown resistors with the bus-hold circuitry is not recommended.
To ensure the high-impedance state during power up or power down, OE should be tied to V_CCA through a pullup
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
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. If either V_CC input is at GND,
then both ports are in the high-impedance state.
T_A
–40°C to 85°C
ORDERING INFORMATION
PACKAGE ⁽¹⁾
ORDERABLE PART NUMBER
TSSOP – DGG
Tape and reel
SN74AVCAH164245GR
TVSOP – DGV
Tape and reel
SN74AVCAH164245VR
VFBGA – GQL
Tape and reel
SN74AVCAH164245KR
TOP-SIDE MARKING
AVCAH164245
WAH4245
WAH4245
(1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
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.
Widebus, DOC are trademarks of Texas Instruments.
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 © 2002–2005, Texas Instruments Incorporated