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Micrel, Inc.
DIFFERENTIAL PECL-to-TTL TRANSLATOR
Precison Edge(R) PrecisionSY10ELT21 Edge(R) 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(R)
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 0.01F 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
1
Issue Date: March 2006
Micrel, Inc.
Precision Edge(R) SY10ELT21 SY100ELT21
PACKAGE/ORDERING INFORMATION
Ordering Information(1)
NC 1 D2
PECL TTL
8 VCC 7Q 6 NC 5 GND
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
D3 VBB 4
8-Pin SOIC (Z8-1)
Notes: 1. Contact factory for die availability. Dice are guaranteed at TA = 25C, DC Electricals only. 2. Tape and Reel. 3. Pb-Free package is recommended for new designs.
M9999-031506 hbwhelp@micrel.com or (408) 955-1690
2
Micrel, Inc.
Precison Edge(R) 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
D L H Open /D H L Open Q L H L
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
VCC = 4.75V to 5.25V
TA = -40C Symbol IOS ICC VOH VOL Parameter Output Short Circuit Current Power Supply Current Output HIGH Voltage Output LOW Voltage Min. -80 -- 2.5 2.0 -- Max. -200 20 -- -- 0.5 TA = 0C Min. -80 -- 2.5 2.0 -- Max. -200 20 -- -- 0.5 TA = +25C Min. -80 -- 2.5 2.0 -- Typ. -- 14 -- -- -- Max. -200 20 -- -- 0.5 TA = +85C Min. -80 -- 2.5 2.0 -- Max. -200 20 -- -- 0.5 Unit mA mA V V V Condition VOUT = 0V -- IOH = -3.0mA IOH = -15mA IOL = 24mA
PECL DC ELECTRICAL CHARACTERISTICS
VCC = 4.75V to 5.25V
TA = -40C Symbol IIH IIL VIH VIL VBB Parameter Input HIGH Current Input LOW Current Input HIGH Voltage(2) 10ELT 100ELT Min. -- 0.5 Max. 150 -- TA = 0C Min. -- 0.5 Max. 150 -- TA = +25C Min. -- 0.5 3870 3835 3050 3190 3650 3620 Typ. -- -- -- -- -- -- -- Max. 150 -- 4190 4120 3520 3525 3750 3740 TA = +85C Min. -- 0.5 Max. 150 -- Unit A A mV mV mV Condition
3770 4110 3835 4120 3050 3500 3190 3525 3570 3700 3620 3740
3830 4160 3835 4120 3050 3520 3190 3525 3620 3730 3620 3740
3940 4280 3835 4120 3050 3555 3190 3525 3690 3810 3620 3740
Input LOW Voltage(2) 10ELT 100ELT Reference Output(2) 10ELT 100ELT
NOTE: 2. These values are for VCC = 5.0V. Level Specifications will vary 1:1 VCC.
M9999-031506 hbwhelp@micrel.com or (408) 955-1690
3
Micrel, Inc.
Precision Edge(R) SY10ELT21 SY100ELT21
AC ELECTRICAL CHARACTERISTICS
VCC = 4.75V to 5.25V
TA = -40C Symbol tPLH tPHL tskpp fMAX VCMR VPP tr tf Parameter Propagation Delay D to Output Q Part-to-Part Skew(1, 2) Maximum Input Frequency
(2, 3, 4)
TA = 0C Min. 2.0 -- 160 2.4 200 -- Max. 3.0 0.5 -- VCC -- 1.5
TA = +25C Min. 2.0 -- 160 2.4 200 -- Typ. -- -- -- -- -- -- Max. 3.0 0.5 -- VCC -- 1.5
TA = +85C Min. 2.0 -- 160 2.4 200 -- Max. 3.0 0.5 -- VCC -- 1.5 Unit ns ns MHz V mV ns CL = 50pF Condition CL = 50pF CL = 50pF CL = 50pF
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
4
Micrel, Inc.
Precison Edge(R) SY10ELT21 SY100ELT21
8 LEAD SOIC .150" WIDE (Z8-1)
Rev. 03
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL
+ 1 (408) 944-0800
FAX
+ 1 (408) 474-1000
WEB
http://www.micrel.com
The information furnished by Micrel in this datasheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer. Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser's use or sale of Micrel Products for use in life support appliances, devices or systems is at Purchaser's own risk and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale. (c) 2006 Micrel, Incorporated.
M9999-031506 hbwhelp@micrel.com or (408) 955-1690
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