TriQuint’s TQ2061 is a high-frequency clock generator. It utilizes a 25 MHz to 35 MHz TTL input to generate a 500 MHz to 700 MHz PECL output. The TQ2061 has a completely self-contained Phase-Locked Loop (PLL) running at 500 MHz to 700 MHz. This stable PLL allows for a low period-to-period output jitter of 70 ps (max), and enables tight duty cycle control of 55 to 45 (worst case).

Features

• Output frequency range: 500 MHz to 700 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:

25 ps peak-to-peak (typ)

70 ps peak-to-peak (max)

• Reference clock input: 25 MHz to 35 MHz TTL-level crystal oscillator

• Self-contained loop filter

• Optional 200 Ω 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