LM1881

LM1881 - LM1881 Video Sync Separator April 2001 LM1881...

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LM1881 Video Sync Separator General Description The LM1881 Video sync separator extracts timing informa- tion including composite and vertical sync, burst/back porch timing, and odd/even field information from standard nega- tive going sync NTSC, PAL * and SECAM video signals with amplitude from 0.5V to 2V p-p. The integrated circuit is also capable of providing sync separation for non-standard, faster horizontal rate video signals. The vertical output is produced on the rising edge of the first serration in the vertical sync period. A default vertical output is produced after a time delay if the rising edge mentioned above does not occur within the externally set delay period, such as might be the case for a non-standard video signal. Features n AC coupled composite input signal n >10 k input resistance n <10 mA power supply drain current n Composite sync and vertical outputs n Odd/even field output n Burst gate/back porch output n Horizontal scan rates to 150 kHz n Edge triggered vertical output n Default triggered vertical output for non-standard video signal (video games-home computers) Connection Diagram * PAL in this datasheet refers to European broadcast TV standard “Phase Alternating Line”, and not to Programmable Array Logic. LM1881N DS009150-1 Order Number LM1881M or LM1881N See NS Package Number M08A or N08E April 2001 LM1881 Video Sync Separator © 2001 National Semiconductor Corporation DS009150 www.national.com
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Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage 13.2V Input Voltage 3 V P-P (V CC = 5V) 6V P-P (V CC 8V) Output Sink Currents; Pins, 1, 3, 5 5 mA Output Sink Current; Pin 7 2 mA Package Dissipation (Note 2) 1100 mW Operating Temperature Range 0˚C–70˚C Storage Temperature Range -65˚C to +150˚C ESD Susceptibility (Note 3) 2 kV Soldering Information Dual-In-Line Package (10 sec.) 260˚C Small Outline Package Vapor Phase (60 sec.) 215˚C Infrared (15 sec.) 220˚C See AN-450 “Surface Mounting Methods and their Effect on Product Reliability” for other methods of soldering surface mount devices. Electrical Characteristics V CC = 5V; R SET = 680 k ;T A = 25˚C; Unless otherwise specified Parameter Conditions Typ Tested Limit (Note 4) Design Limit (Note 5) Units (Limits) Supply Current Outputs at Logic 1 V CC =5V V CC = 12V 5.2 5.5 10 12 mAmax mAmax DC Input Voltage Pin 2 1.5 1.3 1.8 Vmin Vmax Input Threshold Voltage (Note 6) 70 55 85 mVmin mVmax Input Discharge Current Pin 2; V IN =2V 11 6 16 μAmin μAmax Input Clamp Charge Current Pin 2; V IN = 1V 0.8 0.2 mAmin R SET Pin Reference Voltage Pin 6; (Note 7) 1.22 1.10 1.35 Vmin Vmax Outputs I OUT =40μA ; Logic 1 V CC =5V V CC = 12V 4.5 4.0 11.0 Vmin Vmin I OUT = 1.6 mA Logic 1 V CC =5V V CC = 12V 3.6 2.4 10.0 Vmin Vmin Outputs I OUT
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This note was uploaded on 02/08/2011 for the course EE 459L taught by Professor Weber during the Spring '11 term at USC.

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LM1881 - LM1881 Video Sync Separator April 2001 LM1881...

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