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CD74ACT297-MIL датащи(PDF) 6 Page - Texas Instruments |
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CD74ACT297-MIL датащи(HTML) 6 Page - Texas Instruments |
6 / 18 page CD74ACT297 DIGITAL PHASE-LOCKED LOOP SCHS297D – AUGUST 1998 – REVISED JUNE 2002 6 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 detailed description (continued) Thus, the simple first-order phase-locked loop with an adjustable K counter is the equivalent of an analog phase-locked loop with a programmable VCO gain. D/U φA2 Divide-by-K Counter Divide-by-N Counter Mfc I/D Circuit I/D OUT I/D CLK Carry Borrow K CLK XORPD OUT φB fin, φin 2 Nfc fout, φout φA1 J K ECPD ENCTR Figure 3. DPLL Using Both Phase Detectors in a Ripple-Cancellation Scheme absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage range, VCC –0.5 V to 6 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DC input diode current, IIK (VI < –0.5 V or VI > VCC + 0.5 V) ±20 mA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DC input diode current, IOK (VO < –0.5 V or VO > VCC + 0.5 V) ±50 mA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DC output source or sink current per output pin, IO (VO > –0.5 V or VO < VCC + 0.5 V) ±50 mA . . . . . . . . . . Continuous current through VCC or GND (see Note 1) ±100 mA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Package thermal impedance, θJA (see Note 2) 73 °C/W . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Storage temperature range, Tstg –65 °C to 150°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . † Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTES: 1. For up to four outputs per device, add ±25 mA for each additional output. 2. The package thermal impedance is calculated in accordance with JESD 51-7. recommended operating conditions MIN MAX UNIT VCC Supply voltage 4.5 5.5 V VIH High-level input voltage 2 V VIL Low-level input voltage 0.8 V VI Input voltage 0 VCC V VO Output voltage 0 VCC V ∆t/∆v Input rise and fall slew rate 10 ns TA Operating free-air temperature range –55 125 °C |
Аналогичный номер детали - CD74ACT297-MIL |
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Аналогичное описание - CD74ACT297-MIL |
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