Datasheet
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DESCRIPTION/ORDERING INFORMATION
SN74AVCB324245
32-BIT DUAL-SUPPLY BUS TRANSCEIVER
WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-STATE OUTPUTS
SCES485A – AUGUST 2003 – REVISED MARCH 2005
• Inputs/Outputs Can Tolerate up to 4.6 V,
Which Allows Mixed-Voltage-Mode Data
• Member of the Texas Instruments Widebus+™
Communications
Family
• I
off
Supports Partial-Power-Down Mode
• DOC™ Circuitry Dynamically Changes Output
Operation
Impedance, Resulting in Noise Reduction
Without Speed Degradation • Fully Configurable Dual-Rail Design Allows
Each Port to Operate Over the Full 1.4-V to
• Dynamic Drive Capability Is Equivalent to
3.6-V Power-Supply Range
Standard Outputs With I
OH
and I
OL
of
• Latch-Up Performance Exceeds 100 mA Per
– ± 24 mA at 3-V V
CC
JESD 78, Class II
– ± 15 mA at 2.3-V V
CC
• ESD Protection Exceeds JESD 22
– ± 9 mA at 1.65-V V
CC
– 2000-V Human-Body Model (A114-A)
– ± 6 mA at 1.4-V V
CC
– 200-V Machine Model (A115-A)
• Control Inputs V
IH
/V
IL
Levels Are Referenced
– 1000-V Charged-Device Model (C101)
to V
CCB
Voltage
• If Either V
CC
Input Is at GND, Both Ports Are in
the High-Impedance State
This 32-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 1.4 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 SN74AVCB324245 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 SN74AVCB324245 is designed so that the control pins (1DIR, 2DIR, 1 OE, and 2 OE) are supplied by V
CCB
.
To ensure the high-impedance state during power up or power down, OE shall be tied to V
CCB
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,
both ports are in the high-impedance state.
ORDERING INFORMATION
T
A
PACKAGE
(1)
ORDERABLE PART NUMBER TOP-SIDE MARKING
LFBGA – GKE SN74AVCB324245KR
–40 ° C to 85 ° C Tape and reel WD4245
LFBGA – ZKE (Pb-free) 74AVCB324245ZKER
(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.
Copyright © 2003–2005, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.