MAX3690

19-4774; Rev 1; 4/99 +3.3V, 622Mbps, SDH/SONET 8:1 Serializer with Clock Synthesis and TTL Inputs General Description The MAX3690 serializer is ideal for converting 8-bitwide, 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 serialdata 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. ____________________________Features o Selectable Reference Clock Frequency: 77.76MHz, 51.84MHz, or 38.88MHz o Single +3.3V Supply o 77Mbps (8-bit) Parallel to 622Mbps Serial Conversion o Clock Synthesis for 622Mbps Serial Data o 200mW Power o TTL Parallel Clock and Data Inputs o Differential 3.3V PECL Serial-Data Output MAX3690 ________________________Applications 622Mbps SDH/SONET Transmission Systems 622Mbps ATM/SONET Access Nodes Add/Drop Multiplexers Digital Cross Connects PART MAX3690ECJ Ordering Information TEMP. RANGE -40°C to +85°C PIN-PACKAGE 32 TQFP Pin Configuration appears at end of data sheet. Typical Operating Circuit 38.88MHz TTL CRYSTAL REFERENCE VCC = +3.3V PCLKI PD0 PD1 PD2 PD3 PD4 PD5 PD6 PD7 PCLKO RCLK VCC CKSET 1µF 1µF OVERHEAD GENERATION MAX3690 FIL+ FIL- GND SD- SD+ VCC = +3.3V 130Ω 130Ω VCC =...