Microchip SY89295U Bedienungsanleitung

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SY89295U

2.5V/3.3V 1.5GHz Precision LVPECL

Programmable Delay

Precision Edge is a registered trademark of Micrel, Inc

MicroLeadFrame and MLF are registered trademarks of Amkor, Inc.

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

General Description

The SY89295U is a programmable delay line that delays

the input signal using a digital control signal. The delay

can vary from 3.2ns to 14.8ns in 10ps increments. In

addition, the input signal is LVPECL, uses either a 2.5V

±5% or 3.3V ±10% power supply, and is guaranteed over

the full industrial temperature range (–40°C to +85°C).

The delay varies in discrete steps based on a control word.

The control word is 10-bits long and controls the delay in

10ps increments. The eleventh bit is D[10] and is used to

simultaneously cascade the SY89295U which allows for a

larger delay range. In addition, the input pins IN and /IN

default to an equivalent low state when left floating.

Further, for maximum flexibility, the control register

interface accepts CMOS or TTL level signals.

For applications that require an analog delay input, see the

SY89296L which is a programmable delay chip with fine

tune control. The SY89295U and SY89296U are part of

Micrel’s high-speed, Precision Edge

®

product line.

Data sheets and support documentation can be found on

Micrel’s web site at: www.micrel.com

.

Precision Edge

®

Features

•Precision LVPECL programmable delay line

•Guaranteed AC performance over temperature and

voltage:

− >1.5GHz f

MAX

− <160ps rise/fall times

• Low-jitter design:

− <10ps

PP

total jitter

− <2ps

RMS

cycle-to-cycle jitter

− <1ps

RMS

random jitter

•Programmable delay range: 3.2ns to 14.8ns in 10ps

increments

•Increased monotonicity over the MIC100EP195

• ±10ps INL

• V

BB

output reference voltage

•Parallel inputs accepts LVPECL or CMOS/LVTTL

•Low voltage operation: 2.5V ±5% and 3.3V ±10%

•Industrial –40°C to +85°C temperature range

•Available in 32-pin (5mm × 5mm) MLF

®

and

32-pin TQFP packages

Applications

• Clock de-skewing

• Timing adjustments

• Aperture centering

March 2011

M9999-032511

[email protected]

or (408) 955-1690

Produktspezifikationen