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TDA4853 Datasheet(PDF) 16 Page - NXP Semiconductors |
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TDA4853 Datasheet(HTML) 16 Page - NXP Semiconductors |
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16 / 60 page  1999 Jul 13 16 Philips Semiconductors Product specification I2C-bus autosync deflection controllers for PC/TV monitors TDA4853; TDA4854 CHARACTERISTICS VCC = 12 V; Tamb =25 °C; peripheral components in accordance with Figs 1 and 2; unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT Horizontal sync separator INPUT CHARACTERISTICS FOR DC-COUPLED TTL SIGNALS: PIN HSYNC Vi(HSYNC) sync input signal voltage 1.7 −− V VHSYNC(sl) slicing voltage level 1.2 1.4 1.6 V tr(HSYNC) rise time of sync pulse 10 − 500 ns tf(HSYNC) fall time of sync pulse 10 − 500 ns tW(HSYNC)(min) minimum width of sync pulse 0.7 −−µs Ii(HSYNC) input current VHSYNC = 0.8 V −−−200 µA VHSYNC = 5.5 V −− 10 µA INPUT CHARACTERISTICS FOR AC-COUPLED VIDEO SIGNALS (SYNC-ON-VIDEO, NEGATIVE SYNC POLARITY) VHSYNC sync amplitude of video input signal voltage Rsource =50 Ω− 300 − mV VHSYNC(sl) slicing voltage level (measured from top sync) Rsource =50 Ω 90 120 150 mV Vclamp(HSYNC) top sync clamping voltage level Rsource =50 Ω 1.1 1.28 1.5 V Ich(HSYNC) charge current for coupling capacitor VHSYNC >Vclamp(HSYNC) 1.7 2.4 3.4 µA tW(HSYNC)(min) minimum width of sync pulse 0.7 −−µs Rsource(max) maximum source resistance duty cycle = 7% −− 1500 Ω Ri(diff)(HSYNC) differential input resistance during sync − 80 −Ω Automatic polarity correction for horizontal sync horizontal sync pulse width related to line period −− 25 % td(HPOL) delay time for changing polarity 0.3 − 1.8 ms Vertical sync integrator tint(V) integration time for generation of a vertical trigger pulse fH = 15.625 kHz; IHREF = 0.52 mA 14 20 26 µs fH = 31.45 kHz; IHREF = 1.052 mA 710 13 µs fH = 64 kHz; IHREF = 2.141 mA 3.9 5.7 6.5 µs fH = 100 kHz; IHREF = 3.345 mA 2.5 3.8 4.5 µs Vertical sync slicer (DC-coupled, TTL compatible): pin VSYNC Vi(VSYNC) sync input signal voltage 1.7 −− V VVSYNC(sl) slicing voltage level 1.2 1.4 1.6 V Ii(VSYNC) input current 0 V < VSYNC < 5.5 V −−±10 µA t PH () t H ------------ |
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