NJM2257M Nisshinbo

NJM2257 SYNCHRONOUS SEPARATOR WITH AFC GENERAL DESCRIPTION PACKAGE OUTLINE The NJM2257 excutes Horizontal and Vertical synchronous signal separation, and odd / even field signal detection, from composit video signals. Built-in 1 / 2 fH Killer Function circuit can make stabilization of the Horizontal signal oscillation output during the vertical period. NJM2257D NJM2257M FEATURES Operating Voltage (+4.5 to +5.3V) Internal AFC circuit (Horizontal sync. signal.) Internal 1 / 2 fH Killer Function AFC output Pulse Delay time is Adjustable Vertical synchronous pulse width is Adjustable Internal Field Discrlainat Function Package Outline DIP16, DMP16 Bipolar Technology APPLICATION VTR, TV, AV components etc. BLOCK DIAGRAM Ver.2004-02-17 -1- NJM2257 ABSOLUTE MAXIMUM RATINGS (T = 25C) a PARAMETER SYMBOL RATINGS UNIT + Supply Voltage V +7 V Power Dissipation P (DIP16) 500 mW D (DMP16) 350 mW Operating Temperature Range Topr -20 to +75 C Storage Temperature Range T - 40 to +125 stg C ELECTRICAL CHARACTERISTICS (V = 5V, T = 25C) CC a PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT Quiessent Current I - 23.0 30.0 mA Q AFC Free Run Frequency f 15.54 15.74 15.94 KHz OH none adjust T SW=a 3.5 4.0 4.5 AHW1 AFC HD pulse width S adjust T SW=b 2.5 4.0 5.5 AHW2 AFC HD Delet Time T -1.0 0.5 2.0 S AHD AFC Lock Range f 500 700 - Hz HL AFC Cap Charange f 400 600 - Hz HP H V 4.0 4.2 - HAH AFC Output Voltage V L V - 0 0.1 HAL Sync Sepa Sync. Separation Level VHSR - 0.16 0.18 V Sync Sepa Delay Time T 0.05 0.20 0.35 S HCD H V 4.0 4.2 - HCH Sync Sepa Output Voltage V L V - 0 0.1 HCL HD Output Palth Width T 4.0 5.5 7.0 S HPW HD Output Delay Time T 0.35 0.6 0.8 S HPD H V 4.0 4.2 - HfH HD Output Voltage V L V - 0 0.1 HfL V Sync Palth Width V 170 190 210 S VW V Sync Delay Time T 7.0 10.0 13.0 S VD H TVH 4.0 4.2 - V Sync Output Voltage V L V - 0 0.1 VL odd T 246 256 266 FOD Field Distinction Delay Time S even T 216 226 236 FED odd V 4.0 4.2 - FOR Fideld Distinction Output V Voltage even V - 0 0.1 FER Ver.2004-02-17 - 2 -