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X9313WP Datasheet(PDF) 7 Page - Intersil Corporation |
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X9313WP Datasheet(HTML) 7 Page - Intersil Corporation |
7 / 12 page 7 FN8177.5 April 18, 2007 Power-Up and Power-Down Requirements The recommended power-up sequence is to apply VCC/VSS first, then the potentiometer voltages. During power-up, the data sheet parameters for the DCP do not fully apply until 1ms after VCC reaches its final value. The VCC ramp spec is always in effect. In order to prevent unwanted tap position changes, or an inadvertent store, bring the CS and INC high before or concurrently with the VCC pin on power-up. AC Operating Characteristics Over recommended operating conditions unless otherwise stated. SYMBOL PARAMETER LIMITS UNIT MIN TYP (Note 4) MAX tCI CS to INC setup 100 ns tID INC HIGH to U/D change 100 ns tDI U/D to INC setup 2.9 µs tIL INC LOW period 1 µs tIH INC HIGH period 1 µs tIC INC inactive to CS inactive 1 µs tCPH CS deselect time (STORE) 20 ms tCPH CS deselect time (NO STORE) 100 ns tIW INC to VW change 5 µs tCYC INC cycle time 2 µs tR, tF (Note 5) INC input rise and fall time 500 µs tPU (Note 5) Power-up to wiper stable 10 µs tR VCC (Note 5) VCC power-up rate 0.2 50 V/ms tWR (Note 5) Store cycle 10 ms NOTES: 4. Typical values are for TA = +25°C and nominal supply voltage. 5. This parameter is not 100% tested. CS INC U/D VW tCI tIL tIH tCYC tID tDI tIW MI (SEE NOTE) tIC tCPH tF tR 10% 90% 90% NOTE: MI IN THE AC TIMING DIAGRAM REFERS TO THE MINIMUM INCREMENTAL CHANGE IN THE VW OUTPUT DUE TO A CHANGE IN THE WIPER POSITION. FIGURE 4. AC TIMING DIAGRAM X9313 |
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