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LS7642FO Datasheet(PDF) 2 Page - LSI Computer Systems |
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LS7642FO Datasheet(HTML) 2 Page - LSI Computer Systems |
2 / 5 page TRANSIENT CHARACTERISTICS (See Figures 2, 3 and 4): PARAMETER SYMBOL MIN TYP MAX UNI T CONDITION SYNC Frequency fS 40 - 70 Hz - EXT, SENS/ Touch Duration TS1 67 - infinite ms 60Hz TS1 80 - infinite ms 50Hz TRIG/ pulse width (see Note 2) TW - 130 - µs 60Hz TW - 156 - µs 50Hz Conduction Angle ø 45 - 159 deg - ø incremental steps ∆ ø - 1.4 - deg - (Note 1) On/Off slew rate SS - 1.4 - deg/33.33ms 60Hz SS - 1.4 - deg/40ms 50Hz Note 1: Total number of steps = 82. Note 2: TW = 488us (60Hz), 586us (50Hz) available. Contact factory for details. DC ELECTRICAL CHARACTERISTICS: (TA = +25oC, all voltages referenced to VSS. VDD = +5V unless otherwise noted.) PARAMETER SYMBOL MIN TYP MAX UNIT CONDITION Supply voltage VDD 4.5 5.0 5.5 V - Supply current IDD - 300 400 µA Output unloaded, VDD = 5V SYNC Lo VISL - - 2.1 V - SYNC Hi VISH 2.9 - - V - BCV input: Dynamic Voltage Range Vb 1.25 - 4.4 V VDD = 5V Voltage increment per step ∆ Vb/∆ø - 39 - mV ∆ ø = 1.4o, VDD = 5V EXT, SENS/ Lo VIEL - - 1.5 V - EXT, SENS/ Hi VIEH 3.5 - - V - TRIG/ Lo VOL - 0.2 - V - TRIG/ Hi VOH - 5.0 - V - TRIG/ Sink Current ITSNK 35 - - mA VOTRIG = 2.5V 7642-042908-2 ABSOLUTE MAXIMUM RATINGS: PARAMETER SYMBOL VALUE UNIT DC supply voltage VDD - Vss +7 V Any input voltage VIN Vss - 0.3 to VDD + 0.3 V Operating temperature TA 0 to +90 o C Storage temperature TSTG -65 to +150 o C TRIG/ (Pin 8) The TRIG/ can be turned on or off by applying the active logic level at either the SENS/ or the EXT input for a brief duration. In the Off state, the TRIG/ sits at steady high level turning off the triac in series with the lamp. In the On state, the TRIG/ outputs a low going pulse once every half cycle of the AC at a conduction angle set by the voltage at the BCV input. Upon power up the TRIG/ output defaults to the following states: For LS7642 the TRIG/ is off. For LS7642FO the TRIG/ is on |
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