CGS3321 Datasheet | National Semiconductor

Description These devices are designed for Clock Generation and Support (CGSTM) applications up to 110 MHz. The CGS332x series of devices are crystal controlled CMOS oscillators requiring a minimum of external cponents. The 332x devices provide selectable output divide ratio. The circuit is designed to operate over a wide frequency range using fundamental mode or overtone crystals. Features - National's CGS family of devices for high frequency clock source applications - Crystal frequency operation range: fundamental: 10 MHz to 110 MHz typical 3rd or 5th overtone: 10 MHz to 95 MHz - 1000V ESO protection on OSC_IN and OSC_OUT pins. 2000V ESO protection on all other pins - Output current drive of 48 rn A for IOl/l OH - FACTTM CMOS output levels - Output has high speed short circuit protection - Intended for Pierce oscillator applications - Hysteresis inputs to improve noise margin - CGS3321 has duty cycle adjust - CGS3322 has 1, 2, 4 divide ratio Block Diagrams Vee CRYST!~ { TERMINALS 0 - - + - - - - - - - - - - - - -.... I---+--C> OUT Note: Pin numbers vary for each device. Dive DCADJ OEH TLl F/11503-1 4-148 Block Diagrams (Continued) IN3L Vee Input Drivers INPSL INPUT INPSH Vee GND TL/F/ll503-2 GND TL/F/ll503-3 Oscillator Stage 100 kn TLl F/ll...