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GS2988 数据表(PDF) 10 Page - Gennum Corporation |
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GS2988 数据表(HTML) 10 Page - Gennum Corporation |
10 / 17 page GS2988 Dual-Slew-Rate, Cable Driver with 3Gb/s Capability Data Sheet 52131 - 4 December 2010 10 of 17 4.4 Output Disable The GS2988 supports an output disable function for the serial data differential output. Control of this function is determined by the setting of the DISABLE control pin. The serial output disable (DISABLE), disables power to the entire device. When asserted LOW, the SDO/SDO output driver is powered-down. 4.5 Output Signal Presence Indicator (OSP) The GS2988 supports an output signal presence indicator function. The output signal presence pin (OSP) is an active-low output that indicates when a valid output signal has been detected at the pre-driver output. The output signal presence function measures signal-edge energy to indicate that the pre-driver to the serial data outputs is toggling. 4.6 Output Amplitude (RSET) The output amplitude of the GS2988 can be adjusted by changing the value of the RSET resistor as shown in Figure 4-1. For an 800mVp-p output with a nominal ±7% tolerance, a value of 750Ω is required. A ±1% SMT resistor should be used. Table 4-2: Slew Rate Selection SD/HD Rise/Fall Time 0 SMPTE 424M & 292M compliant 1 SMPTE 259M compliant Floating SMPTE 259M compliant Table 4-3: Output Disable DISABLE SDO/SDO 0 All Chip Power Down 1 Operational Floating Operational Table 4-4: Output Signal Presence Indicator Pre-Driver Output OSP Pin Valid signal present 0 No valid signal present 1 |
类似零件编号 - GS2988 |
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类似说明 - GS2988 |
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