The 8735BKI-21LF is a differential-to-3.3V LVPECL zero-delay clock generator from Renesas Electronics Corporation, part of the established 8735 (ICS8735) timing family used to distribute low-skew reference clocks at up to 700 MHz. It fits hardware engineers and procurement teams building networking, telecom, and server systems that need tightly synchronised clock distribution across a board.
The 8735 family uses an on-chip PLL to buffer one differential reference into multiple 3.3V LVPECL outputs with near-zero input-to-output delay. The 8735BKI-21LF comes in a 32-lead VFQFN package with an exposed pad, a lead-free, surface-mount part suited to compact high-speed PCBs. Here are the key features that matter for your design:
Key Features of the 8735BKI-21LF
Zero Delay Clock Generation
An integrated PLL locks the outputs to the input reference, giving near-zero propagation delay between input and output. That keeps timing tight across the clock tree in synchronous designs.
Differential-to-3.3V LVPECL Outputs
The device accepts a differential reference and drives low-skew 3.3V LVPECL outputs, the signalling level of choice for high-speed clock distribution. LVPECL delivers clean edges and low jitter for demanding links.
Operation up to 700 MHz
The 8735BKI-21LF supports output frequencies up to 700 MHz, covering fast backplane and line-card clocking without an additional multiplier stage.
Low-Skew Fan-Out Distribution
Built on the 8735 1:5 architecture, the device fans a single reference out to several synchronised, low-skew copies, cutting the number of discrete buffers on the board.
32-Lead VFQFN Package, Surface-Mount
It ships in a 32-lead VFQFN package with an exposed pad for thermal and ground performance, suited to standard SMT assembly on dense boards.
Lead-Free and RoHS-Compliant
The LF part number denotes a lead-free, RoHS-compliant build, supporting compliant manufacturing and greener supply chains.
Applications of the 8735BKI-21LF
This part is typically used in:
- Ethernet switches and routers
- Telecom line cards and infrastructure
- SONET/SDH equipment
- Server and storage systems
- High-speed backplane clock distribution
- Networking and datacomm hardware
- Wireless base station equipment
- Embedded clock trees and timing cards
- FPGA and ASIC reference clocking
- Low-skew clock fan-out buffering
- Test and measurement instrumentation
- Broadcast and video timing systems