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SN74AVCB324245_06

更新时间： 2024-11-19 05:17:39
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德州仪器 - TI 总线收发器输出元件
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14页 276K
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32-BIT DUAL-SUPPLY BUS TRANSCEIVER WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-STATE OUTPUTS

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SN74AVCB324245_06 数据手册

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SN74AVCB324245  
32-BIT DUAL-SUPPLY BUS TRANSCEIVER  
WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-STATE OUTPUTS  
www.ti.com  
SCES485A–AUGUST 2003–REVISED MARCH 2005  
FEATURES  
•
Inputs/Outputs Can Tolerate up to 4.6 V,  
Which Allows Mixed-Voltage-Mode Data  
Communications  
•
Member of the Texas Instruments Widebus+™  
Family  
•
•
Ioff Supports Partial-Power-Down Mode  
Operation  
•
DOC™ Circuitry Dynamically Changes Output  
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  
3.6-V Power-Supply Range  
•
Dynamic Drive Capability Is Equivalent to  
Standard Outputs With IOH and IOL of  
•
•
Latch-Up Performance Exceeds 100 mA Per  
JESD 78, Class II  
– ±24 mA at 3-V VCC  
– ±15 mA at 2.3-V VCC  
– ±9 mA at 1.65-V VCC  
– ±6 mA at 1.4-V VCC  
ESD Protection Exceeds JESD 22  
– 2000-V Human-Body Model (A114-A)  
– 200-V Machine Model (A115-A)  
•
•
Control Inputs VIH/VIL Levels Are Referenced  
to VCCB Voltage  
– 1000-V Charged-Device Model (C101)  
If Either VCC Input Is at GND, Both Ports Are in  
the High-Impedance State  
DESCRIPTION/ORDERING INFORMATION  
This 32-bit noninverting bus transceiver uses two separate configurable power-supply rails. The A port is  
designed to track VCCA. VCCA accepts any supply voltage from 1.4 V to 3.6 V. The B port is designed to track  
VCCB. VCCB 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, 1OE, and 2OE) are supplied by VCCB  
.
To ensure the high-impedance state during power up or power down, OE shall be tied to VCCB 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 Ioff. The Ioff circuitry disables the outputs,  
preventing damaging current backflow through the device when it is powered down. If either VCC input is at GND,  
both ports are in the high-impedance state.  
ORDERING INFORMATION  
TA  
PACKAGE(1)  
ORDERABLE PART NUMBER  
SN74AVCB324245KR  
TOP-SIDE MARKING  
WD4245  
LFBGA – GKE  
LFBGA – ZKE (Pb-free)  
–40°C to 85°C  
Tape and reel  
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.  
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