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SN74TVC16222DGGR Datasheet(PDF) 5 Page - Texas Instruments |
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SN74TVC16222DGGR Datasheet(HTML) 5 Page - Texas Instruments |
5 / 17 page SN74TVC16222A 22BIT VOLTAGE CLAMP SCDS087G − APRIL 1999 − REVISED APRIL 2005 5 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 APPLICATION INFORMATION TVC background information In personal computer (PC) architecture, there are industry-accepted bus standards. These standards define, among other things, the I/O voltage levels at which the bus communicates. Examples include the GTL+ host bus, the AGP graphics port, and the PCI local bus. In new designs, the system components must communicate with existing bus infrastructure. Providing an evolutionary upgrade path is important in the design of PC architecture, but the existing bus standards must be preserved. To achieve the ever-present need for smaller, faster, lighter devices that draw less power, yet have faster performance, most new high-performance digital integrated circuits are designed and produced with advanced submicron semiconductor process technologies. These devices have thin gate-oxide or short channel lengths and very low absolute-maximum voltages that can be tolerated at the inputs/outputs (I/Os) without causing damage. In many cases, the I/Os of these devices are not tolerant of the high-state voltage levels on the preexisting buses with which they must communicate. Therefore, it became necessary to protect the I/Os of devices by limiting the I/O voltages. The Texas Instruments (TI ) translation voltage-clamp (TVC) family is designed specifically for protecting sensitive I/Os (see Figure 2). The information in this data sheet describes the I/O-protection application of the TVC family and should enable the design engineer to successfully implement an I/O-protection circuit utilizing the TI TVC solution. Low-Voltage I/O Device TVC Family Voltage-Clamp Device Standard-Voltage I/O Bus Figure 2. Thin Gate-Oxide Protection Application |
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