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DUAL DIFFERENTIAL
PECL-to-TTL
TRANSLATOR
ClockWorks™
SY10ELT23
SY100ELT23
FEATURES
■ 3.0ns typical propagation delay
■ <500ps typical output-to-output skew
■ Differential PECL inputs
■ 24mA TTL outputs
■ Flow-through pinouts
■ Available in 8-pin SOIC package
PIN CONFIGURATION/BLOCK DIAGRAM
1
D
0
D
0
2
PECL TTL
3
D
1
8
V
CC
7
Q
0
6
Q
1
DESCRIPTION
The SY10/100ELT23 are dual differential PECL-to-TTL
translators. Because PECL (Positive ECL) levels are
used, only +5V and ground are required. The small outline
8-lead SOIC package and the low skew dual gate design
of the ELT23 makes it ideal for applications which require
the translation of a clock and a data signal.
The ELT23 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 TTL Outputs
Dn Differential PECL Inputs
VCC +5.0V Supply
GND Ground
5
D
1
4
SOIC
TOP VIEW
GND
Rev.: G Amendment: 0
1
Issue Date:
December 1999
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Micrel
ClockWorks™
SY10ELT23
SY100ELT23
ABSOLUTE MAXIMUM RATINGS
(1)
Symbol Paramter Value Unit
VCC Power Supply Voltage –0.5 to +7.0 V
VI PECL Input Voltage 0V to VCC+0.5 V
O Voltage Applied to –0.5 to +5.5 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
A 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.
DC ELECTRICAL CHARACTERISTICS
(1)
VCC = VCC (Min.) to VCC (Max.)
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
CC Power Supply Current — 30 — 30 — 30 — 30 mA —
I
NOTE:
1. Parametric values specified at: 5 volt Power Supply Range 100ELT23 Series: +4.5V to +5.5V.
10ELT23 Series +4.75V to +5.5V.
AC ELECTRICAL CHARACTERISTICS
(1)
VCC = VCC (Min.) to VCC (Max.)
TA = -40°CTA = 0°CTA = +25°CTA = +85°C
Symbol Parameter Min. Max. Min. Max. Min. Max. Min. Max. Unit Condition
t
PLH Propagation Delay 2.5 3.5 2.5 3.5 2.5 3.5 2.5 3.5 ns CL = 50pF
tPHL D to Output Q
tskpp Part-to-Part Skew
tskew++ Within-Device Skew
tskew– – Within-Device Skew
r Output Rise/Fall Time — 1.5 — 1.5 — 1.5 — 1.5 ns CL = 50pF
t
tf 1.0V to 2.0V
fMAX Maximum Input Frequency
NOTES:
1. Parametric values specified at: 5 volt Power Supply Range 100ELT23 Series: +4.5V to +5.5V.
2. Device-to-Device Skew considering HIGH-to-HIGH transitions at common VCC level.
3. Within-Device Skew considering HIGH-to-HIGH transitions at common VCC level.
4. Within-Device Skew considering LOW-to-LOW transitions at common VCC level.
5. These parameters are guaranteed but not tested.
(2,5)
(3,5)
(4,5)
— 0.5 — 0.5 — 0.5 — 0.5 ns CL = 50pF
— 0.3 — 0.3 — 0.3 — 0.3 ns CL = 50pF
— 0.3 — 0.3 — 0.3 — 0.3 ns CL = 50pF
(5)
160 — 160 — 160 — 160 — MHz CL = 50pF
10ELT23 Series +4.75V to +5.5V.
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Micrel
ClockWorks™
SY10ELT23
SY100ELT23
TTL DC ELECTRICAL CHARACTERISTICS
(1)
VCC = VCC (Min.) to VCC (Max.)
TA = -40°CTA = 0°CTA = +25°CTA = +85°C
Symbol Parameter Min. Max. Min. Max. Min. Max. Min. Max. Unit Condition
OH Output HIGH Voltage 2.5 — 2.5 — 2.5 — 2.5 — V IOH = –3.0mA
V
2.0 — 2.0 — 2.0 — 2.0 — V IOH = –15mA
VOL Output LOW Voltage — 0.5 — 0.5 — 0.5 — 0.5 V IOL = 24mA
I
OS Output Short Circuit Current –80 –200 –80 –200 –80 –200 –80 –200 mA VOUT = 0V
NOTE:
1. Parametric values specified at: 5 volt Power Supply Range 100ELT23 Series: +4.5V to +5.5V.
10ELT23 Series +4.75V to +5.5V.
PECL DC ELECTRICAL CHARACTERISTICS
(1)
VCC = VCC (Min.) to VCC (Max.)
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 HIGH Current 0.5 — — 0.5 — — 0.5 — — 0.5 — — µA
VCMR Common Mode Range 2.2 — VCC 2.2 — VCC 2.2 — VCC 2.2 — VCC V
V
PP Minimum Peak-to-Peak
V
IH Input HIGH Voltage
VIL Input LOW Voltage
NOTES:
1. Parametric values specified at: 5 volt Power Supply Range 100ELT23 Series: +4.5V to +5.5V.
2. 200mV input guarantees full logic at output.
3. These values are for VCC = 5.0V. Level Specifications will vary 1:1 VCC.
Input
(2)
200 — — 200 — — 200 — — 200 — — mV
(3)
10ELT 3770 — 4110 3830 — 4160 3870 — 4190 3940 — 4280
100ELT 3835 — 4120 3835 — 4120 3835 — 4120 3835 — 4120
(3)
10ELT 3050 — 3500 3050 — 3520 3050 — 3520 3050 — 3555
100ELT 3190 — 3525 3190 — 3525 3190 — 3525 3190 — 3525
10ELT23 Series +4.75V to +5.5V.
mV
mV
PRODUCT ORDERING CODE
Ordering Package Operating VCC Range
Code Type Range (V)
SY10ELT23ZC Z8-1 Commercial +4.75 to +5.5
SY10ELT23ZCTR Z8-1 Commercial +4.75 to +5.5
SY100ELT23ZC Z8-1 Commercial +4.5 to +5.5
SY100ELT23ZCTR Z8-1 Commercial +4.5 to +5.5
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Micrel
8 LEAD SOIC .150" WIDE (Z8-1)
ClockWorks™
SY10ELT23
SY100ELT23
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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