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LS7338 데이터시트(PDF) 2 Page - LSI Computer Systems |
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LS7338 데이터시트(HTML) 2 Page - LSI Computer Systems |
2 / 5 page INPUT/OUTPUT DESCRIPTION: SENSE (Pin 1) A logic 0 applied to this input for a minimum of three SYNC cy- cles, TS1 (50ms for 60Hz, 60ms for 50Hz), causes the circuit to step to the next state in the operating sequence. SLAVE (Pin 2) Same description as SENSE (Pin 1) except that logic 1 replaces logic 0. This input is designed to be used with Remote Exten- sions (See Figure 5 and Figure 6.) VDD (Pin 3) Supply voltage negative terminal. TRIG (Pin 4) TRIG is a negative-going pulse occurring once every half cycle of the SYNC input. Pulse width is 33µs. Table 1 in the General Description shows values of the TRIG phase angle for the differ- ent states. (See Figure 2 and Figure 3.) VSS (Pin 5) Supply voltage positive terminal. OSC (Pin 6) An R-C network connected to this input controls the frequency of oscillation which determines the Time-out, TD1, in State 1. TD1 is approximately 255RC. The Oscillator is active only in State 1. Chip to chip Oscillation Tolerance is ±10% for fixed value of RC. Tie Pin 6 to VSS if a Time-out is not desired. (See Figure 5.) CAP (Pin 7) The CAP input is for external component connection for the PLL fil- ter capacitor. (See Figure 5.) SYNC (Pin 8) The AC Line Frequency (50/60Hz) is applied to this input. The Phase-Lock Loop synchronizes all internal timings to the AC signal at the SYNC input. (See Figure 5.) 7338-112497-2 ABSOLUTE MAXIMUM RATINGS: PARAMETER SYMBOL VALUE UNIT DC supply voltage VSS - VDD +20 V Any input voltage VIN VSS-20 to VSS + .5 V Operating temperature TA 0 to +85 °C Storage temperature TSTG -65 to +150 °C DC ELECTRICAL CHARACTERISTICS: (TA = 25°C, all voltages referenced to VDD) PARAMETER SYMBOL MIN TYP MAX UNIT CONDITIONS Supply Voltage VSS +12 - +18 V - Supply Current ISS - 1.6 2.2 mA VSS = +15V, Output off Input Voltages SYNC Lo VIRL 0 - VSS-9.5 V - SYNC Hi VIRH VSS-5.5 - VSS V - SENSE Lo VIOL 0 - VSS-8 V - SENSE Hi VIOH VSS-2 - VSS V - SLAVE Lo VIVL 0 - VSS-8 V - SLAVE Hi VIVH VSS-2 - VSS V - Input Current SYNC, SENSE & IIH - - 110 uA With Series 1.5M Ω SLAVE Hi Resistor to 115VAC SYNC, SENSE & SLAVE Lo IIL - - 100 nA - TRIG Hi Voltage VOH - VSS - V - TRIG Lo Voltage VOL - VSS-8 - V VSS = +15V TRIG Sink Current IOS 25 - - mA VSS = +15V,VOL = VSS -4V TRANSIENT CHARACTERISTICS (See Fig. 2 and 3) (All timings are based on Fs = 60Hz, unless otherwise specified.) PARAMETER SYMBOL MIN TYP MAX UNIT SYNC Frequency Fs 40 - 70 Hz SENSE/SLAVE Sense Time Ts1 50 - Infinite ms TRIG Pulse Width Tw - 33 - µs STATE 1 Time-out period TD1 - 255RC - s STATE 2 Time-out period TD2 - 209 - s |
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