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X93156UM8IZ-2.7 Datasheet(PDF) 5 Page - Intersil Corporation |
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X93156UM8IZ-2.7 Datasheet(HTML) 5 Page - Intersil Corporation |
5 / 7 page 5 FN8182.3 November 21, 2007 AC Timing Power-Up and Down Requirements There are no restrictions on the power-up or power-down conditions of VCC and the voltages applied to the potentiometer pins provided that VCC is always more positive than or equal to VH and VL, i.e., VCC ≥ VH,VL. The VCC ramp rate spec is always in effect. Pin Descriptions RH and RL The RH and RL pins of the X93156 are equivalent to the fixed terminals of a mechanical potentiometer. The minimum voltage is VSS and the maximum is VCC. The terminology of RH and RL references the relative position of the terminal in relation to wiper movement direction selected by the U/D input. Rw The Rw pin of the X93156 is the wiper terminal of the potentiometer which is equivalent to the movable terminal of a mechanical potentiometer. Up/Down (U/D) The U/D input controls the direction of the wiper movement and whether the counter is incremented or decremented. Increment (INC) The INC input is negative-edge triggered. Toggling INC will move the wiper and either increment or decrement the counter in the direction indicated by the logic level on the U/D input. Chip Select (CS) The device is selected when the CS input is LOW. The current counter value is stored in nonvolatile memory when CS is returned HIGH while the INC input is also HIGH. After the store operation is complete the X93156 will be placed in the low power standby mode until the device is selected once again. tR, tF (Note 7) INC input rise and fall time 500 µs tR VCC (Note 7) VCC power-up rate 0.2 50 V/ms tWR Store cycle 510 ms AC Electrical Specifications Over recommended operating conditions unless otherwise specified. (Continued) SYMBOL PARAMETER MIN TYP MAX UNIT CS INC U/D RW tCI tIL tIH tCYC tID tDI tIW MI (Note 4) tIC tCPHS tF tR 10% 90% 90% tCPHNS X93156 |
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