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DIFFERENTIAL PECL-to-TTL TRANSLATOR

Precison Edge® PrecisionSY10ELT21 Edge® SY100ELT21

Micrel, Inc.
DIFFERENTIAL PECL-to-TTL TRANSLATOR
Precison Edge® PrecisionSY10ELT21 Edge® SY100ELT21
SY10ELT21 SY100ELT21
FEATURES
2.5ns typical propagation delay Low power Differential PECL inputs 24mA TTL outputs Flow-through pinouts Available in 8-pin SOIC package Precision Edge®
DESCRIPTION
The SY10 / 100ELT21 are single differential PECL-toTTL translators. Because PECL (Positive ECL) levels are used, only +5V and ground are required. The small outline 8-lead SOIC package and low skew single gate design make the ELT21 ideal for applications that require the translation of a clock or data signal where minimal space, low power, and low cost are critical. The VBB output allow differential single-ended, or ACcoupled interface to the device. If used, the VBB output should be bypassed to VCC with a 0.01µF capacitor. The ELT21 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.
PIN NAMES
Pin Q D, / D VCC VBB GND TTL Output Differential PECL Inputs +5.0V Supply Reference Output Ground Function
Precision Edge is a registered trademark of Micrel, Inc. M9999-031506 hbwhelp@micrel.com or (408) 955-1690
Rev.: C Amendment: / 0
Issue Date: March 2006
Micrel, Inc.
Precision Edge® SY10ELT21 SY100ELT21
PACKAGE / ORDERING INFORMATION
Ordering Information(1)
PECL TTL
Part Number SY10ELT21ZC SY10ELT21ZCTR(2) SY100ELT21ZC SY100ELT21ZCTR(2) SY10ELT21ZI SY10ELT21ZITR(2) SY100ELT21ZI SY100ELT21ZITR(2) SY10ELT21ZG(3) SY10ELT21ZGTR(2, 3) SY100ELT21ZG(3) SY100ELT21ZG(TR(2, 3)
Package Type Z8-1 Z8-1 Z8-1 Z8-1 Z8-1 Z8-1 Z8-1 Z8-1 Z8-1 Z8-1 Z8-1 Z8-1
Operating Range Commercial Commercial Commercial Commercial Industrial Industrial Industrial Industrial Industrial Industrial Industrial Industrial
Package Marking HEL21 HEL21 XEL21 XEL21 HEL21 HEL21 XEL21 XEL21 HEL21 with Pb-Free bar-line indicator HEL21 with Pb-Free bar-line indicator XEL21 with Pb-Free bar-line indicator XEL21 with Pb-Free bar-line indicator
Lead Finish Sn-Pb Sn-Pb Sn-Pb Sn-Pb Sn-Pb Sn-Pb Sn-Pb Sn-Pb Pb-Free NiPdAu Pb-Free NiPdAu Pb-Free NiPdAu Pb-Free NiPdAu
8-Pin SOIC (Z8-1)
M9999-031506 hbwhelp@micrel.com or (408) 955-1690
Micrel, Inc.
Precison Edge® SY10ELT21 SY100ELT21
ABSOLUTE MAXIMUM RATINGS(1)
Symbol VCC VI VO IO TLEAD Tstore TA Parameter Power Supply Voltage PECL Input Voltage Voltage Applied to Output at HIGH State Current Applied to Output at LOW State Lead Temperature (soldering, 20sec.) Storage Temperature Operating Temperature Value -0.5 to +7.0 0V to VCC+0.5 -0.5 to +5.5 Twice the Rated IOL +260 -65 to +150 -40 to +85 Unit V V V mA °C °C °C
TRUTH TABLE
NOTE: 1. Permanent device damage may occur if ABSOLUTE MAXIMUM RATINGS are exceeded. This is a stress rating only and functional operation is not implied at conditions other than those detailed in the operational sections of this data sheet. Exposure to ABSOLUTE MAXIMUM RATlNG conditions for extended periods may affect device reliability.
TTL DC ELECTRICAL CHARACTERISTICS
PECL DC ELECTRICAL CHARACTERISTICS
Input LOW Voltage(2) 10ELT 100ELT Reference Output(2) 10ELT 100ELT
M9999-031506 hbwhelp@micrel.com or (408) 955-1690
Micrel, Inc.
Precision Edge® SY10ELT21 SY100ELT21
AC ELECTRICAL CHARACTERISTICS
Min. 2.0 - 160 2.4 Input(5) 200 -
Max. 3.0 0.5 - VCC - 1.5
Common Mode Range Minimum Peak-to-Peak Output Rise / Fall Time (1.0V to 2.0V)
NOTES: 1. Part-to-Part Skew considering HIGH-to-HIGH transitions at common VCC levels. 2. These parameters are guaranteed, but not tested. 3. Frequency at which output levels will meet a 0.8V to 2.0V minimum swing. 4. The fMAX value is specified as the minimum guaranteed maximum frequency. Actual operational maximum frequency may be greater. 5. 200mV input guarantees full logic at output.
M9999-031506 hbwhelp@micrel.com or (408) 955-1690
Micrel, Inc.
Precison Edge® SY10ELT21 SY100ELT21
8 LEAD SOIC .150" WIDE (Z8-1)
Rev. 03
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
http://www.micrel.com
M9999-031506 hbwhelp@micrel.com or (408) 955-1690