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SN74TVC16222ADL Datasheet(PDF) 10 Page - Texas Instruments |
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SN74TVC16222ADL Datasheet(HTML) 10 Page - Texas Instruments |
10 / 18 page SN74TVC16222A 22BIT VOLTAGE CLAMP SCDS087G − APRIL 1999 − REVISED APRIL 2005 10 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 APPLICATION INFORMATION features and benefits The TVC family has several features that benefit a system designer when implementing a sensitive-I/O-protection solution. Table 1 lists these features and their associated benefits. Table 1. Features and Benefits FEATURES BENEFITS Any FET can be used as the reference transistor. Ease of layout All FETs on one die, tight process control Very low spread of VO relative to VREF No active control logic (passive device) No logic power supply (VCC) required Flow-through pinout Ease of trace routing Devices offered in different bit widths and packages Optimizes design and cost effectiveness Designer flexibility with VREF input Allows migration to lower-voltage I/Os without board redesign conclusion The TI TVC family provides the designer with a solution for protection of circuits with I/Os that are sensitive to high-state voltage-level overshoots. The flexibility of TVC enables a low-voltage migration path for advanced designs to align with industry standards. frequently asked questions (FAQs) 1. Q: Can any of the transistors in the array be used as the reference transistor? A: Yes, any transistor can be used as long as its VBIAS pin is connected to the GATE pin. 2. Q: In the recommended operating conditions table of the data sheet, the typical VBIAS is 3.3 V. Should VBIAS be equal to or greater than VREF on the reference transistor? A: VBIAS is a variable that is determined by VREF. VBIAS is connected to VDD through a resistor to allow the bias voltage to be controlled by VREF. VDD can be as high as 5.5 V. VREF needs to be at least 1 V less than VDDREF on the reference transistor. 3. Q: Do both A and B ports have 5-V I/O tolerance or is 5-V I/O tolerance provided only on the low-voltage side? A: Both ports are 5-V tolerant. |
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