The SY10/100ELT20V is a single TTL-to-differential
PECL translators. Because PECL (Positive ECL) levels
are used, either +5V or +3.3V and ground are required.
The small outline 8-lead SOIC package and low skew
single gate design make the ELT20V ideal for applications
that require the translation of a clock or data signal where
minimal space, low power, and low cost are critical.
The ELT20V 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 CONFIGURATION/BLOCK DIAGRAM
NC 1
Q 2
PECL
TTL
PIN NAMES
Pin
Function
Differential PECL Output
TTL Input
+5V/+3.3V Supply
Ground
8 V
CC
7 D
6 NC
5 GND
Q
D
V
CC
GND
Q 3
NC 4
SOIC
TOP VIEW
Rev.: A
Amendment: /0
1
Issue Date: December 1999
Micrel
ClockWorks™
SY10ELT20V
SY100ELT20V
ABSOLUTE MAXIMUM RATINGS
(1)
Symbol
V
CC
V
I
I
I
I
OUT
Paramter
Power Supply Voltage
TTL Input Voltage
TTL Input Current
PECL Output Current
–Continuous
–Surge
Storage Temperature
Operating Temperature
Value
–0.5 to +7.0
–0.5 to V
CC
–30 to +5.0
50
100
–65 to +150
–40 to +85
°C
°C
Unit
V
V
mA
mA
TRUTH TABLE
D
H
L
Open
Q
H
L
H
Q
L
H
L
T
store
T
A
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
V
CC
= +3.3V
±10%
or +5.0V
±10%
T
A
= –40
°
C
Symbol
I
CC
Parameter
Power Supply Current
Min.
—
Max.
20
T
A
= 0
°
C
Min.
—
Max.
20
—
T
A
= +25
°
C
Min.
Typ.
—
Max.
20
T
A
= +85
°
C
Min.
—
Max.
20
Unit
mA
Condition
—
TTL DC ELECTRICAL CHARACTERISTICS
V
CC
= +3.3V
±10%
or +5.0V
±10%
T
A
= –40
°
C
Symbol
V
IH
V
IL
I
IH
I
IL
V
IK
Parameter
Input HIGH Voltage
Input LOW Voltage
Input HIGH Current
Input LOW Current
Input Clamp Voltage
Min.
2.0
—
—
—
—
—
Max.
—
0.8
20
100
–0.2
–1.2
T
A
= 0
°
C
Min.
2.0
—
—
—
—
—
Max.
—
0.8
20
100
–0.2
–1.2
T
A
= +25
°
C
Min.
2.0
—
—
—
—
—
Typ.
Max.
—
0.8
20
100
–0.2
–1.2
T
A
= +85
°
C
Min.
2.0
—
—
—
—
—
Max.
—
0.8
20
100
–0.2
–1.2
Unit
V
V
µA
mA
V
Condition
—
—
V
IN
= 2.7V
V
IN
= V
CC
V
IN
= 0.5V
I
IN
= –18mA
PECL DC ELECTRICAL CHARACTERISTICS
V
CC
= +3.3V
±10%
or +5.0V
±10%
T
A
= –40
°
C
Symbol
V
OH
Parameter
Min.
Max.
4110
4120
3350
3445
Output HIGH Voltage
(1)
10ELT 3920
100ELT 3915
Output LOW Voltage
(1)
10ELT 3050
100ELT 3170
3050
3190
3370
3380
3050
3190
—
—
3370
3380
3050
3190
3405
3380
T
A
= 0
°
C
Min.
3980
3975
Max.
4160
4120
T
A
= +25
°
C
Min.
4020
3975
Typ.
—
—
Max.
4190
4120
T
A
= +85
°
C
Min.
4090
3975
Max.
4280
4120
mV
Unit
mV
Condition
V
OL
NOTES:
1. These values are for V
CC
= 5.0V. Level Specifications will vary 1:1 with V
CC
.
2
Micrel
ClockWorks™
SY10ELT20V
SY100ELT20V
AC ELECTRICAL CHARACTERISTICS
(1)
V
CC
= +3.3V
±10%
or +5.0V
±10%
T
A
= –40
°
C
Symbol
t
PLH
t
PHL
t
skpp
f
MAX
t
r
t
f
Parameter
Propagation Delay
(1)
Part-to-Part Skew
(2)
Maximum Input Frequency
Output Rise/Fall Time
(20% to 80%)
Min.
100
—
350
200
Max.
600
500
—
500
T
A
= 0
°
C
Min.
100
—
350
200
Max.
600
500
—
500
T
A
= +25
°
C
Min.
100
—
350
200
Typ.
—
—
—
—
Max.
600
500
—
500
T
A
= +85
°
C
Min.
100
—
350
200
Max. Unit
600
500
—
500
ps
ps
MHz
ps
Condition
50Ω to V
CC
– 2.0V
50Ω to V
CC
– 2.0V
50Ω to V
CC
– 2.0V
50Ω to V
CC
– 2.0V
NOTE:
1. Input Rise Time < 1.0ns.
2. Guaranteed by design. Not tested in production.
PRODUCT ORDERING INFORMATION
Ordering
Code
SY10ELT20VZC
SY10ELT20VZCTR
SY100ELT20VZC
SY100ELT20VZCTR
Package
Type
Z8-1
Z8-1
Z8-1
Z8-1
Operating
Range
Commercial
Commercial
Commercial
Commercial
3
Micrel
ClockWorks™
SY10ELT20V
SY100ELT20V
8 LEAD SOIC .150" WIDE (Z8-1)
Rev. 03
MICREL-SYNERGY
TEL
3250 SCOTT BOULEVARD SANTA CLARA CA 95054 USA
FAX
+ 1 (408) 980-9191
+ 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.
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