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3.3V DUAL DIFFERENTIAL
LVPECL-to-LVTTL
TRANSLATOR
ClockWorks™
SY10ELT23L
SY100ELT23L
FEATURES
■ 3.3V power supply
■ 2.0ns typical propagation delay
■ <500ps typical output-to-output skew
■ Differential LVPECL inputs
■ 24mA LVTTL outputs
■ Flow-through pinouts
■ Available in 8-pin SOIC package
PIN CONFIGURATION/BLOCK DIAGRAM
/D
/D
1
D
0
2
0
LVPECL
3
1
LVTTL
8
V
CC
7
Q
0
6
Q
1
DESCRIPTION
The SY10/100ELT23L are dual differential LVPECLto-LVTTL translators with +3.3V power supply. Because
LVPECL (Low Voltage Positive ECL) levels are used,
only +3.3V and ground are required. The small outline 8lead SOIC package and the low skew, dual gate design
of the ELT23L makes it ideal for applications which
require the translation of a clock and a data signal.
The ELT23L 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 Function
Qn LVTTL Outputs
Dn Differential LVPECL Inputs
VCC +3.3V Supply
GND Ground
4
D
1
5
GND
Rev.: G Amendment: 0
1
Issue Date:
July 2000
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Micrel
ClockWorks™
SY10ELT23L
SY100ELT23L
ABSOLUTE MAXIMUM RATINGS
(1)
Symbol Paramter Value Unit
VCC Power Supply Voltage –0.5 to +3.8 V
VI PECL Input Voltage 0V to VCC+0.5 V
O Voltage Applied to –0.5 to VCC V
V
Output at HIGH State
O Current Applied to Twice the mA
I
Output at LOW State Rated IOL
Tstore Storage Temperature –65 to +150 °C
amb Operating Temperature –40 to +85 °C
T
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.
LVTTL DC ELECTRICAL CHARACTERISTICS
VCC = +3.3V ±5%
TRUTH TABLE
DD Q
LH L
HL H
Open Open L
TA = -40°CTA = 0°CTA = +25°CTA = +85°C
Symbol Parameter Min. Max. Min. Max. Min. Max. Min. Max. Unit Condition
VOH Output HIGH Voltage 2.0 — 2.0 — 2.0 — 2.0 — V IOH = –3.0mA
VOL Output LOW Voltage — 0.5 — 0.5 — 0.5 — 0.5 V IOL = 24mA
ICC Power Supply Current — 30 — 30 — 30 — 30 mA
OS Output Short Circuit Current –80 –240 –80 –240 –80 –240 –80 –240 mA VOUT = 0V
I
LVPECL DC ELECTRICAL CHARACTERISTICS
VCC = +3.3V ±5%
TA = -40°CTA = 0°CTA = +25°CTA = +85°C
Symbol Parameter Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit
IIH Input HIGH Current — — 150 — — 150 — — 150 — — 150 µA
IIL Input LOW Current 0.5 — — 0.5 — — 0.5 — — 0.5 — — µA
VCMR Common Mode Range 1.5 — VCC 1.5 — VCC 1.5 — VCC 1.5 — VCC V
V
PP Minimum Peak-to-Peak
V
IH Input HIGH Voltage
VIL Input LOW Voltage
NOTES:
1. 200mV input guarantees full logic at output.
2. These values are for VCC = 3.3V. Level Specifications will vary 1:1 with VCC.
Input
(1)
200 — — 200 — — 200 — — 200 — — mV
(2)
10ELT 2070 — 2410 2130 — 2460 2170 — 2490 2130 — 2565
100ELT 2135 — 2420 2135 — 2420 2135 — 2420 2135 — 2420
(2)
10ELT 1350 — 1800 1350 — 1820 1350 — 1820 1350 — 1820
100ELT 1490 — 1825 1490 — 1825 1490 — 1825 1490 — 1825
mV
mV
2
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ClockWorks™
SY10ELT23L
Micrel
SY100ELT23L
AC ELECTRICAL CHARACTERISTICS
VCC = +3.3V ±5%
TA = –40°CTA = 0°CTA = +25°CTA = +85°C
Symbol Parameter Min. Max. Min. Max. Min. Max. Min. Max. Unit Condition
PLH Propagation Delay 1.5 2.5 1.5 2.5 1.5 2.5 1.5 2.5 ns CL = 20pF
t
tPHL
tskpp Part-to-Part Skew
tskew++ Within-Device Skew
tskew– – Within-Device Skew
r Output Rise/Fall Time 0.5 1.0 0.5 1.0 0.5 1.0 0.5 1.0 ns CL = 20pF
t
tf 1.0V to 2.0V
MAX Maximum Input Frequency
f
NOTES:
1. Device-to-Device Skew considering HIGH-to-HIGH transitions at common VCC level.
2. Within-Device Skew considering HIGH-to-HIGH transitions at common VCC level.
3. Within-Device Skew considering LOW-to-LOW transitions at common VCC level.
4. All skew parameters are guaranteed but not tested.
5. Frequency at which output levels will meet a 0.8V to 2.0V minimum swing.
6. The fMAX value is specified as the minimum guaranteed maximum frequency. Actual operational maximum frequency may be greater.
(1,4)
(2,4)
(3,4)
— 0.5 — 0.5 — 0.5 — 0.5 ns CL = 20pF
— 0.3 — 0.3 — 0.3 — 0.3 ns CL = 20pF
— 0.3 — 0.3 — 0.3 — 0.3 ns CL = 20pF
(5,6)
160—160—160—160—MHz CL = 20pF
PRODUCT ORDERING CODE
Ordering Package Operating VCC Range
Code Type Range (V)
SY10ELT23LZC Z8-1 Commercial +3.3 ±5%
SY10ELT23LZCTR Z8-1 Commercial +3.3 ±5%
SY100ELT23LZC Z8-1 Commercial +3.3 ±5%
SY100ELT23LZCTR Z8-1 Commercial +3.3 ±5%
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Micrel
8 LEAD SOIC .150" WIDE (Z8-1)
ClockWorks™
SY10ELT23L
SY100ELT23L
Rev. 03
MICREL-SYNERGY 3250 SCOTT BOULEVARD SANTA CLARA CA 95054 USA
TEL + 1 (408) 980-9191 FAX + 1 (408) 914-7878 WEB http://www.micrel.com
This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or
other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent right of Micrel Inc.
© 2000 Micrel Incorporated
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