Clock buffer reduces board space
30 November 2009
TI introduces the industry’s smallest sine-to-sine wave clock buffer.
Texas Instruments Incorporated (TI) has 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.
The CDC3S04 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 range of mobile applications including mobile phones (UMTS/WCDMA/GSM), smartphones, mobile internet devices (MID), ultra mobile PCs (UMPC), navigation units and global positioning systems (GPS).
Features and benefits of the CDC3S04 include:
• 1:4 low-jitter, sine-to-sine clock buffer replaces multiple TCXOs, saving board space and cost
• An integrated on-chip LDO saves board space by eliminating the need for an internal low-dropout (LDO) regulator
• The on-chip LDO acts as a TCXO on/off switch for power savings during low-power standby
• It distributes sine-wave signals to four different peripherals while adding negligible phase-noise, minimising electromagnetic interference (EMI)
• A built-in I2C interface gives customers real-time control for outputs, polarity and internal coding
• Designers can accelerate time-to-market by taking advantage of TI’s OMAP4xx processors
The CDC3S04 is in volume production now, and evaluation modules will be available in late Q409. It comes in a WCSP package measuring 1.6mm x 2.0mm.
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