1
ECL Pro™
SY100EPT21L
Micrel, Inc.
M9999-120505
hbwhelp@micrel.com or (408) 955-1690
DESCRIPTION
■Guaranteed over the industrial temperature range:
–40°C to +85°C
■Pin-for-pin; plug-in replacement to MC100EPT21D/DT
■3.3V power supply
■1.9ns typical propagation delay
■275MHz fMAX (Clock)
■Differential LVPECL inputs
■24mA LVTTL output
■Flow-through pinout
■Q output will default LOW with inputs open
■VBB output
■Available in 8-pin MSOP and SOIC packages
The SY100EPT21L is a single, differential LVPECL-
to-LVTTL translator using a single +3.3V power supply.
Because low voltage positive ECL (LVPECL) levels are
used, only +3.3V and ground are required. The small
outline 8-pin SOIC package and low-skew, single-gate
design make the EPT21L ideal for applications that
require the translation of a clock or data signal where
minimal space, low power, and low cost are critical.
VBB allows a differential, single-ended, or AC-coupled
interface to the device. If used, the VBB output should be
bypassed to VCC with 0.01µF capacitor.
Under open input conditions, the /D will be biased at a
VCC/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 100EPT is compatible with positive ECL 100K
logic levels. For applications that require the smallest
footprint, consider the SY89321L in an ultra-small
(2mm ×2mm) 8-pin MLF™ package.
All support documentation can be found on Micrel’s web
site at: www.micrel.com.
FEATURES
3.3V DIFFERENTIAL
LVPECL-to-LVTTL TRANSLATOR
ECL Pro™
SY100EPT21L
Rev.: E Amendment: /0
Issue Date: December 2005
ECL Pro™
ECL Pro is a trademark of Micrel, Inc.
Micro
LeadFrame and MLF are trademarks of Amkor Technology, Inc.
APPLICATIONS
■ASIC/FPGA interface
■Legacy interface
■Precision differential-to-general purpose, single-
ended translation
Micrel ON Semiconductor
SY100EPT21LZI MC100EPT21D
SY100EPT21LZITR MC100EPT21DR2
SY100EPT21LKI MC100EPT21DT
SY100EPT21LKITR MC100EPT21DTR2
CROSS REFERENCE TABLE
2
ECL Pro™
SY100EPT21L
Micrel, Inc.
M9999-120505
hbwhelp@micrel.com or (408) 955-1690
PACKAGE/ORDERING INFORMATION
1NC
D
/D
VBB
8 VCC
Q
NC
GND
7
6
5
2
3
4
LVPECL
LVTTL
8-Pin SOIC (Z8-1)
8-Pin MSOP (K8-1)
Ordering Information(1)
Package Operating Package Lead
Part Number Type Range Marking Finish
SY100EPT21LZC Z8-1 Commercial XEP21L Sn-Pb
SY100EPT21LZCTR(2) Z8-1 Commercial XEP21L Sn-Pb
SY100EPT21LKC K8-1 Commercial XP21 Sn-Pb
SY100EPT21LKCTR(2) K8-1 Commercial XP21 Sn-Pb
SY100EPT21LZI Z8-1 Industrial XEP21L Sn-Pb
SY100EPT21LZITR(2) Z8-1 Industrial XEP21L Sn-Pb
SY100EPT21LKI K8-1 Industrial XP21 Sn-Pb
SY100EPT21LKITR(2) K8-1 Industrial XP21 Sn-Pb
SY100EPT21LZG(3) Z8-1 Industrial XEP21L with Pb-Free
Pb-Free bar-line indicator NiPdAu
SY100EPT21LZGTR(2, 3) Z8-1 Industrial XEP21L with Pb-Free
Pb-Free bar-line indicator NiPdAu
SY100EPT21LKG(3) K8-1 Industrial XP21 with Pb-Free
Pb-Free bar-line indicator NiPdAu
SY100EPT21LKGTR(2, 3) K8-1 Industrial XP21 with Pb-Free
Pb-Free bar-line indicator NiPdAu
Notes:
1. Contact factory for die availability. Dice are guaranteed at TA = 25°C, DC Electricals only.
2. Tape and Reel.
3. Pb-Free package is recommended for new designs.
Pin Number Pin Name Pin Function
1 NC No Connect.
2, 3 D, /D Differential LVPECL Input Pair.
4 VBB Output Reference Voltage.
5 GND Ground.
6 NC No Connect.
7 Q LVTTL Output.
8 VCC Positive Supply.
PIN DESCRIPTION
TRUTH TABLE
D/D Q
LH L
HL H
Open Open L
3
ECL Pro™
SY100EPT21L
Micrel, Inc.
M9999-120505
hbwhelp@micrel.com or (408) 955-1690
Absolute Maximum Ratings(1)
Power Supply Voltage (VCC) ..........................–0.5 to +3.8V
PECL Input Voltage (VIN) .......................... 0V to VCC +0.5V
Voltage Applied to Output at HIGH State (VOUT) –0.5 to VCC
Current Applied to Output at LOW State (IOUT)
............................................. Twice the Rated IOL (mA)
Lead Temperature (soldering, 20 sec.) ................... +260°C
Storage Temperature (TS) ....................... –65°C to +150°C
Operating Ratings(2)
Power Supply Voltage (VCC) ..........................–0.5 to +3.8V
Ambient Temperature (TA) ......................... –40°C to +85°C
Package Thermal Resistance
SOIC (θJA) multi-layer board ............................. 113°C/W
MSOP (θJA) multi-layer board ........................... 124°C/W
VCC = +3.3V, GND = 0V; TA = –40°C to +85°C; unless noted.
Symbol Parameter Condition Min Typ Max Units
IOS Output Short Circuit Current VOUT = 0V –80 –275 mA
ICC Power Supply Current 14 20 mA
VOH Output HIGH Voltage IOH = –3.0mA(3) 2.3 V
VOL Output LOW Voltage IOL = 24mA 0.5 V
LVTTL OUTPUT DC ELECTRICAL CHARACTERISTICS
VCC = +3.3V, GND = 0V; TA = –40°C to +85°C; unless noted.
Symbol Parameter Condition Min Typ Max Units
IIH Input HIGH Current 150 µA
IIL Input LOW Current D 0.5 µA
/D –300 µA
VIH Input HIGH Voltage Note 3 2135 2420 V
VIL Input LOW Voltage Note 3 1490 1825 V
VBB Reference Output Note 3 1920 1980 2040 V
Notes:
1. Permanent device damage may occur if ratings in the absolute maximum ratings section are exceeded. This is a stress rating only and functional
operation is not implied for conditions other than those detailed in the operational sections of this data sheet. Exposure to absolute maximum ratings
conditions for extended periods may affect device reliability.
2. The data sheet limits are not guaranteed if the device is operated beyond the operating ratings.
3. These values are for VCC = 3.3V. Level Specifications will vary 1:1 VCC.
LVPECL INPUT DC ELECTRICAL CHARACTERISTICS
4
ECL Pro™
SY100EPT21L
Micrel, Inc.
M9999-120505
hbwhelp@micrel.com or (408) 955-1690
VCC = +3.0V to +3.6V, GND = 0V; TA = –40°C to +85°C; unless noted.
Symbol Parameter Condition Min Typ Max Units
tPD Propagation Delay CL = 20pF 1.5 1.9 2.5 ns
tskpp Part-to-Part Skew CL = 20pF(4, 5) 0.5 ns
fMAX Maximum Input Frequency CL = 20pF(6) 275 MHz
VCMR Common Mode Range 1.2 VCC V
VPP Minimum Peak-to-Peak Input Note 7 100 mV
tr, tfOutput Rise/Fall Time CL = 20pF 0.5 1.0 ns
(1.0V to 2.0V)
Notes:
4. Part-to-part skew considering HIGH-to-HIGH transitions at common VCC level.
5. These parameters are guaranteed but not tested.
6. The fMAX value is specified as the minimum guaranteed maximum frequency. Actual operational maximum frequency may be greater.
7. 100mV input guarantees full logic at output.
AC ELECTRICAL CHARACTERISTICS
5
ECL Pro™
SY100EPT21L
Micrel, Inc.
M9999-120505
hbwhelp@micrel.com or (408) 955-1690
8-PIN PLASTIC SOIC (Z8-1)
Rev. 03
6
ECL Pro™
SY100EPT21L
Micrel, Inc.
M9999-120505
hbwhelp@micrel.com or (408) 955-1690
8-PIN MSOP (K8-1)
Rev. 01
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 data sheet 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.
© 2005 Micrel, Incorporated.
