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GS4981-CDA Datasheet(PDF) 4 Page - Gennum Corporation |
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GS4981-CDA Datasheet(HTML) 4 Page - Gennum Corporation |
4 / 14 page 4 520 - 23 - 03 Supply Voltage 4.5 5 13.2 V Supply Current Outputs at Logic 1 VCC = 5 V - 4.6 6.5 mA VCC = 12 V - 5.0 7.0 mA Video Input (Pin 2) (a) Signal Level VCC = 5 V 0.5 - 4 Vp-p (b) Clamp Current Charge 500 650 850 µA Discharge - normal 9 11 13 µA - Nosync flag raised 65 95 115 µA (c) Delay to raising of Nosync flag Video input held high 64 95 130 µs (d) Sync Tip Clamp Voltage - 1.55 - V Sync Slice Level Relative to sync tip clamp voltage 70 77 84 mV RSET Pin Reference Voltage (Pin 6) See Note 1 1.14 1.24 1.34 V Composite Sync Out (Pin 1) See Note 2 40 60 80 ns Delay from Video CL = 15p Back Porch Pulse Out (Pin 5) CL = 15p (a) Delay from Rising Edge of Sync 400 500 650 ns (b) Pulse Width 2.0 2.5 3.2 µs (c) Occurence Rate H H H Vertical Sync Out (Pin 3) (a) Pulse Width Serrations during vertical interval 197.7 197.7 197.7 µs (b) Default Starting Time No serrations during the vertical interval 48 65 82 µs Horizontal Sync Out (Pin 7) CL = 15p (a) Delay from Video 90 190 290 ns (b) Pulse Width 5.0 7.0 9.0 µs Horizontal Scan Rate Modified RSET 15 - 130 kHz Logic Outputs (a) VOH IOH = 40 µA VCC = 5 V 4.2 4.6 - V VCC = 12 V 11.2 11.6 - V IOH = 1.6 mA VCC = 5 V 2.4 3.4 - V Note 3 VCC = 12 V 9.4 10.4 - V (b) VOL IOL = -1.6 mA - 0.3 0.6 V GS4981 ELECTRICAL CHARACTERISTICS (V CC = 5 V, R SET = 680 k Ω, T A = 25 ° C, unless otherwise specified) Note 1: When placing the R SET resistor and the 0.1 µF decoupling capacitor careful attention should be made to ensure that they are as close as possible to pin 6. Care should also be taken to avoid parasitic capacitive coupling from any output pin (pins 1, 3, 5 and 7) to pin 6. Note 2: Measured from slicing point of input falling edge to 50% point of composite sync falling edge. Note 3: Applies only to composite sync, vertical sync, and back porch outputs. Horizontal sync has a passive 10 k Ω pull-up to V CC . PARAMETER CONDITIONS MIN TYP MAX UNITS ORDERING INFORMATION Part Number Package Type Temperature Range GS4981 - CDA 8 PDIP 0 ° to 70° C GS4981 - CKA 8 SOIC 0 ° to 70° C GS4981 - CTA 8 TAPE 0 ° to 70° C GS4981 - IDA 8 PDIP -25 ° to 85° C GS4981 - IKA 8 SOIC -25 ° to 85° C GS4981 - ITA 8 TAPE -25 ° to 85° C |
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