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LS7339 Datasheet(PDF) 2 Page - LSI Computer Systems |
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LS7339 Datasheet(HTML) 2 Page - LSI Computer Systems |
2 / 5 page 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.) NOTE 1: ON will function as described if OFF is at logic 1. If OFF is held at logic 0, the transitions at ON will not cause the output to turn On. NOTE 2: OFF will function as described if ON is at logic 1. If ON is held at logic 0, the transitions at OFF will not cause the the output to turn Off. Tw Tw ø FIGURE 2. OUTPUT CONDUCTION ANGLE, Ø SYNC TRIG 7339/40-032499-2 ON OFF Ø OFF TS1 TD1 TS1 TS1 TS1 TS1 TD1 <TD1 OFF OFF 159˚/STATE 1 159˚/STATE 1 159˚/STATE 1 TD1 RESTART OFF/STATE 0 FIGURE 3. PHASE ANGLE, Ø, vs ON AND OFF DIGITAL COMPARATOR ø DECODE SYNC PHASE-ANGLE POINTER PHASE- LOCK LOOP CONTROL LOGIC BUF BUF BUF SYNC CAP ON OFF V SS V DD FIGURE 4. LS7339/7340 BLOCK DIAGRAM TRIG OSC/TIMER OSC (+V) (-V) DRIVER 4 8 7 1 2 6 5 3 The information included herein is believed to be accurate and reliable. However, LSI Computer Systems, Inc. assumes no responsibilities for inaccuracies, nor for any infringements of patent rights of others which may result from its use. |
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