TriQuint’s TQ2059 is a high-frequency clock generator. It utilizes a 20 MHz to 35 MHz TTL input to generate a 200 MHz to 350 MHz PECL output. The TQ2059 has a completely self-contained Phase-Locked Loop (PLL) running at 400 MHz to 700 MHz. This stable PLL allows for a low period-to-period output jitter of 120 ps (max), and enables tight duty-cycle control of 55to 45 (worst case).

Features

• Output frequency range: 200 MHz to 350 MHz

• One differential PECL output: 600 mV (min) swing

• Common-mode voltage: VDD –1.2 V (max), VDD –1.6 V (min)

• Period-to-period output jitter: 30 ps peak-to-peak (typ) 120 ps peak-to-peak (max)

• Reference clock input: 20 MHz to 35 MHz TTL-level crystal oscillator

• Self-contained loop filter

• Optional 200-ohm pull-down resistors for AC-coupled outputs

• +5 V power supply

• 28-pin J-lead surface-mount package

• Ideal for designs based on DEC Alpha AXP™ processors