| Part Numbert | Mfg | Packt | D/C | Descriptiont | Qty | Company/Contact |
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N82231-2SX239 Datasheet pattern. Depending on the data pattern that it is being trans- mitted, the Deserializer will synchronize to the data stream from the Serializer after some delay. At the point where the Deserializer's PLL locks to the embedded clock, the LOCK pin goes low and valid data appears on the output. The user's application determines control of the SYNC sig- nal input. One recommendation is a direct feedback loop from the LOCK pin on the deserializer. The serializer stops sending SYNC patterns when the SYNC input returns to a low state. N82231-2SX239 Price The TC820 is a 3-3/4 digit measurement system com- bining an integrating analog-to-digital converter, frequency counter, and logic level tester in a single package. The TC820 supersedes the TC7106 in new designs by improv- ing performance and reducing system cost. The TC820 adds features that are difficult, expensive, or impossible to provide with older A/D converters (see the competitive evaluation). The high level of integration permits TC820- based instruments to deliver higher performance and more features, while actually reducing parts count. Fabricated in low-power CMOS, the TC820 directly drives a 3-3/4 digit (3999 maximum) LCD. With a maximum range of 3999 counts, the TC820 provides 10 times greater resolution in the 200mV t0 400mV range than traditional 3-1/2 digit meters. An auto-zero cycle guarantees a zero reading with a OV input. CMOS process- ing reduces analog input bias current to only lpA. Rollover error (the difference in readings for equal magnitude but opposite polarity input signals) is less than +1 count. Differ- ential reference inputs permit ratiometric measurements for ohms or bridge transducer applications. The TC820's frequency counteroption simplifies design of an instrument well-suited to both analog and digital troubleshooting: voltage, current, and resistance measure- ments, plus precise frequency measurements t0 4MHz (higher frequencies can be measured with an external prescaler), and a simple logic probe. The frequency counter will automatically adjust its range to match the input fre- quency, over a four-decade range. Two logic level measurement inputs permit a TC820- based meter to function as a logic probe. When combined with externallevelshifters,the TC820 will displaylogiclevels on the LCD and also turn on a piezoelectric buzzerwhen the measured logic level is low. Other TC820 features simplify instrument design and reduce parts count. On-chip decimal point drivers are in- cluded, as is a low battery detection annunciator. A piezo- electric buzzer can be controlled with an external switch or by the logic probe inputs. Two oscillator options are pro- vided: A crystal can be used if high accuracy frequency measurements are desired, or a simple RC option can be used for low-end instruments. N82231-2SX239 on stock
- Typical Active Current: 0.5 mA @ f = 1 MHz - TypicaIActive Current: 2 mA @f= fmax (70 ns speed) . Low standby power . Easy memory expansion with CE and OE features . Automatic power-down when deselected . CMOS for optimum speed/power Functional Description |
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