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74AVC16646DGGRE4 数据表(PDF) 1 Page - Texas Instruments

部件名 74AVC16646DGGRE4
功能描述  16-BIT BUS TRANSCEIVER AND REGISTER WITH 3-STATE OUTPUTS
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制造商  TI [Texas Instruments]
网页  http://www.ti.com
标志 TI - Texas Instruments

74AVC16646DGGRE4 数据表(HTML) 1 Page - Texas Instruments

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FEATURES
DESCRIPTION
136
-128
-144
-160
0.4
0.8
1.2
1.6
2.0
2.4
2.8
170
153
119
102
85
68
51
34
17
0
0.4
0.8
1.2
1.6
2.0
2.4
2.8
3.2
TA = 25°C
Process = Nominal
IOL - Output Current - mA
VCC = 3.3 V
VCC = 2.5 V
VCC = 1.8 V
TA = 25°C
Process = Nominal
IOH - Output Current - mA
VCC = 3.3 V
VCC = 2.5 V
VCC = 1.8 V
-80
-96
-112
-32
-48
-64
0
-16
SN74AVC16646
16-BIT BUS TRANSCEIVER AND REGISTER
WITH 3-STATE OUTPUTS
SCES181F – DECEMBER 1998 – REVISED JUNE 2005
Overvoltage-Tolerant Inputs/Outputs Allow
Mixed-Voltage-Mode Data Communications
Member of the Texas Instruments Widebus™
Family
Ioff Supports Partial-Power-Down Mode
Operation
EPIC™ (Enhanced-Performance Implanted
CMOS) Submicron Process
Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
DOC™ (Dynamic Output Control) Circuit
Dynamically Changes Output Impedance,
Package Options Include Plastic Thin Shrink
Resulting in Noise Reduction Without Speed
Small-Outline (DGG) and Thin Very
Degradation
Small-Outline (DGV) Packages
Dynamic Drive Capability Is Equivalent to
Standard Outputs With IOH and IOL of ±24 mA
at 2.5-V VCC
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 VOL vs IOL and VOH vs IOH curves to illustrate the output impedance and drive capability of the 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.
Figure 1. Output Voltage vs Output Current
This 16-bit bus transceiver and register is operational at 1.2-V to 3.6-V VCC, but is designed specifically for
1.65-V to 3.6-V VCC operation.
The SN74AVC16646 can be used as two 8-bit transceivers or one 16-bit transceiver. Data on the A or B bus is
clocked into the registers on the low-to-high transition of the appropriate clock (CLKAB or CLKBA) input. Figure 2
illustrates the four fundamental bus-management functions that can be performed with the SN74AVC16646.
Output-enable (OE) and direction-control (DIR) inputs are provided to control the transceiver functions. In the
transceiver mode, data present at the high-impedance port may be stored in either register or in both. The
select-control (SAB and SBA) inputs can multiplex stored and real-time (transparent mode) data.
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, EPIC, DOC are trademarks of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Copyright © 1998–2005, 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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