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SN74AVC

更新时间: 2024-11-15 22:59:15
品牌 Logo 应用领域
德州仪器 - TI 总线收发器输出元件
页数 文件大小 规格书
11页 171K
描述
16-BIT BUS TRANSCEIVER WITH 3-STATE OUTPUTS

SN74AVC 数据手册

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SN74AVC16245  
16-BIT BUS TRANSCEIVER  
WITH 3-STATE OUTPUTS  
SCES142L – JULY 1998 – REVISED FEBRUARY 2000  
Member of the Texas Instruments  
Widebus Family  
Overvoltage-Tolerant Inputs/Outputs Allow  
Mixed-Voltage-Mode Data Communications  
EPIC (Enhanced-Performance Implanted  
CMOS) Submicron Process  
I
Supports Partial-Power-Down Mode  
off  
Operation  
DOC (Dynamic Output Control) Circuit  
Dynamically Changes Output Impedance,  
Resulting in Noise Reduction Without  
Speed Degradation  
ESD Protection Exceeds JESD 22  
– 2000-V Human-Body Model (A114-A)  
– 200-V Machine Model (A115-A)  
Latch-Up Performance Exceeds 250 mA Per  
JESD 78  
Less Than 2-ns Maximum Propagation  
Delay at 2.5-V and 3.3-V V  
CC  
Package Options Include Plastic Thin  
Shrink Small-Outline (DGG) and Thin Very  
Small-Outline (DGV) Packages  
Dynamic Drive Capability Is Equivalent to  
Standard Outputs With I and I of  
OH  
OL  
±24 mA at 2.5-V V  
CC  
description  
A Dynamic Output Control (DOC) circuit is implemented, which, during the transition, initially lowers the output  
impedance to effectively drive the load and, subsequently, raises the impedance to reduce noise. Figure 1  
shows typical V vs I and V  
vs I  
curves to illustrate the output impedance and drive capability of the  
OL  
OL  
OH  
OH  
circuit. At the beginning of the signal transition, the DOC circuit provides a maximum dynamic drive that is  
equivalent to a high-drive standard-output device. For more information, refer to the TI application reports, AVC  
Logic Family Technology and Applications, literature number SCEA006, and Dynamic Output Control (DOC )  
Circuitry Technology and Applications, literature number SCEA009.  
3.2  
T
= 25°C  
T
= 25°C  
A
A
Process = Nominal  
Process = Nominal  
2.8  
2.4  
2.0  
2.8  
2.4  
2.0  
V
= 3.3 V  
CC  
1.6  
1.2  
0.8  
0.4  
1.6  
1.2  
0.8  
0.4  
V
= 2.5 V  
CC  
V
= 1.8 V  
CC  
V
= 3.3 V  
V
= 2.5 V  
CC  
CC  
V
= 1.8 V  
CC  
–160 –144 –128 –112 –96 –80 –64 –48 –32 –16  
– Output Current – mA  
0
17  
34  
51  
68  
85 102 119 136 153 170  
0
I
– Output Current – mA  
I
OH  
OL  
Figure 1. Output Voltage vs Output Current  
This 16-bit (dual octal) noninverting bus transceiver is operational at 1.2-V to 3.6-V V , but is designed  
CC  
specifically for 1.65-V to 3.6-V V  
operation.  
CC  
The SN74AVC16245 is designed for asynchronous communication between data buses. The control-function  
implementation minimizes external timing requirements.  
This device can be used as two 8-bit transceivers or one 16-bit transceiver. It allows data transmission 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 device so that the buses are effectively isolated.  
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.  
DOC, EPIC, and Widebus are trademarks of Texas Instruments Incorporated.  
Copyright 2000, Texas Instruments Incorporated  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of Texas Instruments  
standard warranty. Production processing does not necessarily include  
testing of all parameters.  
1
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  

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