Integrated sine-to-sine wave clock buffer reduces cost and board space

Jean-Pierre Joosting

Microwave Engineering (11/24/2009 11:59 PM ET)

Dallas, Texas — Texas Instruments claims to have introduced the industry's smallest four-channel, low-power, low-jitter sine-to-sine wave clock buffer, the first device in a family of sine-wave clock buffers. Designated CDC3S04, it can replace up to three individual same-frequency temperature compensated crystal oscillators (TCXOs), reducing board space and bill of materials (BOM) by nearly half.

Designers can use the CDC3S04 in a wide range of mobile applications including cell phones (UMTS/WCDMA/GSM), smartphones, mobile internet devices (MID), ultra mobile PCs (UMPC), navigation units and global positioning systems (GPS). The clock buffer distributes sine-wave signals to four different peripherals while adding negligible phase-noise, minimizing electromagnetic interference (EMI).

This 1:4 low-jitter, sine-to-sine clock buffer features an integrated on-chip LDO (low-dropout) regulator which saves board space and acts as a TCXO on/off switch for power savings during low-power standby. A built-in I2C interface gives customers real-time control for outputs, polarity and internal coding.

For further information visit www.ti.com.