DESCRIPTIONThe AD246 is a compact, inexpensive clock driver that can beused to obtain the required clock from a single 15 V supply. Thecircuit shown in Figure 1 (essentially an AD246) can operate atleast 32 AD204s at the rated minimum supply voltage of 14.25 Vand one additional isolator can be operated for each 40 mVincrease in supply voltage up to 15 V.A supply bypass capacitor is included in the AD246, but if manyAD204s are operated from a single AD246, an external bypassconnector should be used with a value of at least 1 F for everyfive isolators used. Place the capacitor as close as possible to theclock driver.CD4947BCRCRQ+1 F35VTELE D YNETSC426CL K OUTCLK ANDPWR COM15VIN914IN914753624105647891214180pF49.9k 123Figure 1. Clock DriverOUTLINE DIMENSIONSAD246JY PackageDimensions shown in inches and (millimeters)8.40 (0.330) MAX2.50 (0.100)NOM15.90(0.625)MAX2.90 (0.115)SIDEVIEW0.38 (0.015)0.25 (0.010)1213122.50(0.100)2.90(0.115)CLBOTTOMVIEW1.30 (0.050)NOM2.50(0.100)MIN25.30 (0.995) MAXA SPECIFICATIONS(Typical @ 25 C and VS = 15 V, unless otherwise noted.)Model AD246JY AD246JNOUTPU T*Frequency 25 kHz Nominal 25 kHz NominalVoltage 15 V p-p Nominal 15 V p-p NominalFan Out 32 max 32 maxPOWER SUPPLYREQUIREMENTSInput Voltage 15 V 5% 15 V 5%Supply CurrentUnloaded 35 mA 35 mAEach AD204 2.2 mA 2.2 mAAdds 1 mALoad on AD204+VISO or VISO Adds 0.7 mA 0.7 mA*The high current drive will not support a short to ground.Specifications are subject to change without notice.AD246 Pin DesignationsPin (Y) P in (N) Function11215 V Power2 1Clock Output12 14 Common13 24 CommonGENERAL DESCRIPTIONThe AD246 is a compact, inexpensive clock driver that can beused to obtain the required clock from a single 15 V supply. Thecircuit shown in Figure 1 (essentially an AD246) can operate atleast 32 AD204s at the rated minimum supply voltage of 14.25 Vand one additional isolator can be operated for each 40 mVincrease in supply voltage up to 15 V.A supply bypass capacitor is included in the AD246, but if man C0293409/02(0)PRINTED IN U.S.A.2aInformation f