SY89829UHG TR Micrel Inc, SY89829UHG TR Datasheet

SY89829UHG TR

Manufacturer Part Number

SY89829UHG TR

Description

Manufacturer

Micrel Inc

Type

Clock Driverr

Datasheet

1.SY89829UHG_TR.pdf (10 pages)

Specifications of SY89829UHG TR

Number Of Clock Inputs

Mode Of Operation

Differential

Output Frequency

2000MHz

Output Logic Level

LVPECL

Operating Supply Voltage (min)

2.37V

Operating Supply Voltage (typ)

2.5/3.3V

Operating Supply Voltage (max)

3.6V

Package Type

TQFP

Operating Temp Range

-40C to 85C

Operating Temperature Classification

Industrial

Signal Type

LVDS/LVPECL

Mounting

Surface Mount

Pin Count

Lead Free Status / RoHS Status

Compliant

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Micrel, Inc.

Precision Edge is a registered trademark of Micrel, Inc.

M9999-011907

hbwhelp@micrel.com or (408) 955-1690

FEATURES

Dual 1:10 fanout buffer/translator

Accepts LVPECL or LVDS inputs

Multiplexed inputs ideal for redundant clock

switchover

Guaranteed AC parameters:

• > 2GHz f

• < 50ps ch-ch skew

LVDS input includes 100 internal termination

Low supply voltage: 2.5V, 3.3V

–40 C to +85 C temperature range

Output enable (OE) pin

Available in 64 EPAD-TQFP

APPLICATIONS

High-performance PCs

Workstations

Parallel processor-based systems

Other high-performance computing

Communications

Redundant LVPECL or LVDS bus clock switchover

MAX

(toggle)

2.5V/3.3V HIGH-PERFORMANCE, DUAL 1:10

OR LVPECL CLOCK DRIVER w/ INTERNAL

TERMINATION AND REDUNDANT SWITCHOVER

single 1:20 LVPECL Clock Driver. The part is designed for

use in low voltage (2.5V/3.3V) applications which require a

large number of outputs to drive precisely aligned, ultra low

skew signals to their destination. The input is multiplexed

from either LVDS or LVPECL by the CLK_SEL pin. The

LVDS inputs include a 100

the input pair, thus eliminating any need for external

termination. The 2:1 input mux makes this device an ideal

choice for redundant clock applications that need to switch

between two reference clocks. The output enable (OE) is

synchronous so that the outputs will only be enabled/

disabled when they are already in the LOW state. This

eliminates any chance of generating a runt clock pulse

when the device is enabled/disabled as can happen with an

asynchronous control.

and low part-to-part skew (200ps max.)—performance

previously unachievable in a standard product having such

a high number of outputs. The SY89829U is available in a

single space saving package which provides a lower overall

cost solution. In addition, a single chip solution improves

timing budgets by eliminating the multiple device solution

with their corresponding large part-to-part skew.

DESCRIPTION

The SY89829U is a High Performance dual 1:10 or

The SY89829U features low pin-to-pin skew (50ps max.)

internal termination across

Precision Edge

Rev.: D

Issue Date: January 2007

Precision Edge

SY89829U

Amendment: /0

SY89829U

Related parts for SY89829UHG TR

SY89829UHG TR Summary of contents

Page 1

Micrel, Inc. FEATURES Dual 1:10 fanout buffer/translator Accepts LVPECL or LVDS inputs Multiplexed inputs ideal for redundant clock switchover Guaranteed AC parameters: • > 2GHz f (toggle) MAX • < 50ps ch-ch skew LVDS input includes 100 internal termination Low ...

Page 2

Micrel, Inc. PACKAGE/ORDERING INFORMATION SEL2 1 2 LVDS_CLKB 3 /LVDS_CLKB 4 VCCI 5 LVDS_CLKA 6 /LVDS_CLKA 7 CLK_SEL1 64-Pin 8 LVPECL_CLKA EPAD-TQFP /LVPECL_CLKA 9 ...

Page 3

Micrel, Inc. LOGIC SYMBOL LVDS_CLKA /LVDS_CLKA LVPECL_CLKA /LVPECL_CLKA LVDS_CLKB /LVDS_CLKB LVPECL_CLKB /LVPECL_CLKB TRUTH TABLE OE CLK_SEL1 CLK_SEL2 ...

Page 4

Micrel, Inc. ABSOLUTE MAXIMUM RATINGS Symbol Pin Potential to Ground Pin CCI CCO CC V Input Voltage Output Current (Output HIGH) OUT T Lead Temperature (soldering, 20sec.) LEAD T Storage Temperature store Package ...

Page 5

Micrel, Inc. DC ELECTRICAL CHARACTERISTICS Power Supply Symbol Parameter (1) V Power Supply CCI, V CCO ( Total Supply Current CC CC NOTES and V must be connected together on the PCB such that they remain ...

Page 6

Micrel, Inc. AC ELECTRICAL CHARACTERISTICS V = 2.37V to 3.6V, GND = 0V CC Symbol Parameter (2) f Max Toggle Frequency MAX t Propagation Delay PD (3) (Differential) LVPECL IN LVDS IN (4) t Within-Device Skew SKEW (5) Part-to-Part Skew ...

Page 7

Micrel, Inc. LVDS/LVPECL INPUTS V CC LVPECL_CLK 75k /LVPECL_CLK GND LVPECL Input Stage M9999-011907 hbwhelp@micrel.com or (408) 955-1690 75k 75k Figure 1. Simplified LVPECL & LVDS Input Stage 7 Precision Edge SY89829U LVDS Input Stage ® ...

Page 8

Micrel, Inc. TYPICAL CHARACTERISTICS Frequency Response vs. Output Amplitude 900 V = 2.5V SUP 800 V DIFFIN 700 600 500 400 300 200 100 FREQUENCY (MHz) Frequency Response vs. Output Amplitude @2.5V M9999-011907 hbwhelp@micrel.com or (408) 955-1690 = 800mV 8 ...

Page 9

Micrel, Inc. LVPECL TERMINATION RECOMMENDATIONS Output Considerations Be sure to properly terminate all outputs as shown below, or equivalent. For AC coupled applications Notes: 1. For +2.5V systems 250 R2 = 62.5 “source” Notes: 1. Power-saving alternative to ...

Page 10

Micrel, Inc. 64-PIN EPAD-TQFP (DIE UP) (H64-1) 12.00 0.472 10.00 4.50 0.177 64 +0.03 4.50 –0.03 +0.012 0.177 –0.012 1.20 0.047 MAX 0.01 0.004 MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA + 1 (408) ...

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