描述 Description

The 5P49V6975 is a programmable clock generator intended for

high-performance consumer, networking, industrial, computing,

and data-communications applications. The device is a member of

Renesas’ sixth generation of programmable clock technology,

VersaClock 6E.

The 5P49V6975 contains an internal crystal, which eliminates the

need for external crystal and load cap tuning.

Two select pins allow up to four different configurations to be

programmed, and can be used for different operating modes (full

function, partial function, partial power-down), regional standards

(US, Japan, Europe) or system production margin testing. The

5P49V6975 can be configured to use one of two I2C addresses to

allow the use of multiple devices in a system.

Typical Applications

? Ethernet switch/router

? PCI Express 1.0/2.0/3.0/4.0 spread spectrum on

? PCI Express 1.0/2.0/3.0/4.0/5.0 spread spectrum off

? Broadcast video/audio timing

? Multi-function printer

? Processor and FPGA clocking

? Any-frequency clock conversion

? MSAN/DSLAM/PON

? Fiber Channel, SAN

? Telecom line cards

? Laser distance sensing

特性 Features

? Internal crystal input integrated into package

? Flexible 1.8V, 2.5V, 3.3V power rails

? High-performance, low phase noise PLL, < 0.5ps RMS typical

phase jitter on outputs

? Four banks of internal OTP memory

? In-system or factory programmable

? Two select pins accessible with processor GPIOs or

bootstrapping

? I

2C serial programming interface

? 0xD0 or 0xD4 I2C address options allow multiple devices

configured in a same system

? Reference LVCMOS output clock

? Four universal output pairs individually configurable:

? Differential (LVPECL, LVDS, or HCSL)

? Two single-ended (2 LVCMOS in-phase or 180 degrees out

of phase)

? I/O VDDs can be mixed and matched, supporting 1.8V

(LVDS and LVCMOS), 2.5V, or 3.3V

? Independent spread spectrum on each output pair

? Output frequency ranges:

? LVCMOS clock outputs: 1kHz to 200MHz

? LVDS, LVPECL, HCSL differential clock outputs: 1kHz to

350MHz

? Programmable output enable or power-down mode

? Available in 4 × 4 mm 24-LGA package

? -40° to +85°C industrial temperature operation