The MAX3690 serializer is ideal for converting 8-bit-wide, 77Mbps parallel data to 622Mbps serial data in ATM and SDH/SONET applications. Operating from a single +3.3V supply, this device accepts TTL clock and data inputs, and delivers a 3.3V differential PECL serial-data output. A fully integrated PLL synthesizes an internal 622MHz serial clock from a low-speed crystal reference clock (77.76MHz, 51.84MHz, or 38.88MHz). The MAX3690 is available in the extended-industrial temperature range (-40°C to +85°C) in a 32-pin TQFP package.
The MAX3690 serializer converts 8‑bit‑wide, 77 Mbps parallel data to 622 Mbps serial data for ATM and SDH/SONET applications. It operates from a single +3.3 V supply, accepts TTL clock and data inputs, and provides a 3.3 V differential PECL serial‑data output. The device includes an integrated PLL that synthesizes a 622 MHz serial clock from selectable crystal reference frequencies (77.76 MHz, 51.84 MHz, or 38.88 MHz).
Typical applications include 622 Mbps SDH/SONET transmission systems, ATM/SONET access nodes, add/drop multiplexers, and digital cross‑connects. The part is available in an extended‑industrial temperature range (‑40 °C to +85 °C) in a 32‑pin TQFP package and offers features such as single‑supply operation, low power dissipation (200 mW), and programmable reference‑clock selection.
| Supply Voltage Range | -0.5 V to +5 V |
|---|---|
| Serial Clock Rate | 622.08 MHz |
| Parallel Data Setup Time | 1200 ps |
The device can operate with a terminal voltage from –0.5 V to +5 V.
The serializer generates a 622.08 MHz serial clock.