CGS3313 Datasheet | National Semiconductor

Description These devices are designed for Clock Generation and Sup- CD port (CGSTM) applications up to 110 MHz. The CGS331 x C") series of devices are crystal controlled CMOS oscillators en C") requiring a minimum of external ponents. The 331 x de- o C!J vices provide selectable output divide ratio (and selectable crystal drive level). The circuit is designed to operate over a LI) wide frequency range using fundamental model or overtone C") crystals. - Crystal frequency operation range: fundamental: 10 MHz to 100 MHz typical 3rd or 5th overtone: 10 MHz to 85 MHz - Programmable oscillator drive - Selectable fast output edge rates - Output symmetry circuit to adjust 50% duty cycle point between CMOS and TTL levels - Output current drive of 48 rn A for IOl/l OH - FACn M CMOS output levels en C") Co....!.J.. Features - National's CGSTM family of devices for high frequency - Output has high speed short circuit protection - Basic oscillator type: Pierce - Hysteresis inputs to improve noise margin .~ .... clock source applications C") en C") !.J.. Block Diagrams .C..".). C") en C") o C....!.J.. Vee IN3l C") en C") .C. !... OSLIN CRYST!~ C") en C") o C!J { TERt.l INAl S 0 - - + - - - - - - - - - - - - -...