SY100ELT21LZCTR datasheet(1/5 Pages) MICREL

Part #	SY100ELT21LZCTR

Description	3.3V DIFFERENTIAL LVPECL-to-LVTTL TRANSLATOR

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Manufacturer	MICREL [Micrel Semiconductor]

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Precision Edge®

SY10ELT21L

SY100ELT21L

Micrel, Inc.

M9999-031506

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

Function

Q

TTL Output

D, /D

Differential LVPECL Inputs

V

CC

+3.3V Supply

V

BB

Reference Output

GND

Ground

DESCRIPTION

s 3.3V power supply

s 2.0ns typical propagation delay

s Low power

s Differential LVPECL inputs

s 24mA TTL outputs

s Flow-through pinouts

s Available in 8-pin SOIC package

The SY10/100ELT21L are single differential LVPECL-

to-LVTTL translators using a single +3.3V power supply.

Because LVPECL (Low Voltage Positive ECL) levels are

used, only +3.3V and ground are required. The small

outline 8-lead SOIC package and low skew single gate

design make the ELT21L ideal for applications that require

the translation of a clock or data signal where minimal

space, low power, and low cost are critical.

V

BB allows a differential, single-ended, or AC-coupled

interface to the device. If used, the V

BB output should be

bypassed to V

CC with 0.01µF capacitor.

Under open input conditions, the /D will be biased at a

V

CC/2 voltage level and the D input will be pulled to

ground. This condition will force the Q output low to

provide added stability.

The ELT21L is available in both ECL standards: the

10ELT is compatible with positive ECL 10H logic levels,

while the 100ELT is compatible with positive ECL 100K

logic levels.

FEATURES

3.3V DIFFERENTIAL

LVPECL-to-LVTTL

TRANSLATOR

PIN NAMES

Precision Edge®

SY10ELT21L

SY100ELT21L

Rev.: D

Amendment: /0

Issue Date:

March 2006

Precision Edge is a registered trademark of Micrel, Inc.

Precision Edge®

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