MICREL SY10ELT20VZC

5V/3.3V
TTL-to-DIFFERENTIAL
PECL TRANSLATOR
FEATURES
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ClockWorks™
SY10ELT20V
SY100ELT20V
DESCRIPTION
3.3V and 5V power supply options
300ps typical propagation delay
Low power
Differential PECL output
PNP TTL input for minimal loading
Flow-through pinouts
Available in 8-pin SOIC package
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
PIN NAMES
Pin
NC 1
8 VCC
TTL
Q 2
Q
Differential PECL Output
7 D
D
TTL Input
6 NC
VCC
+5V/+3.3V Supply
5 GND
GND
Ground
PECL
Q 3
NC 4
Function
SOIC
TOP VIEW
Rev.: A
1
Amendment: /0
Issue Date: December 1999
ClockWorks™
SY10ELT20V
SY100ELT20V
Micrel
ABSOLUTE MAXIMUM RATINGS(1)
Symbol
Paramter
TRUTH TABLE
Value
Unit
D
Q
Q
VCC
Power Supply Voltage
–0.5 to +7.0
V
H
H
L
VI
TTL Input Voltage
–0.5 to VCC
V
L
L
H
II
TTL Input Current
–30 to +5.0
mA
Open
H
L
IOUT
PECL Output Current
–Continuous
–Surge
mA
50
100
Tstore
Storage Temperature
–65 to +150
°C
TA
Operating Temperature
–40 to +85
°C
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
VCC = +3.3V ±10% or +5.0V ±10%
TA = –40°C
Symbol
ICC
Parameter
Power Supply Current
TA = 0°C
TA = +25°C
TA = +85°C
Min.
Max.
Min.
Max.
Min.
Typ.
Max.
Min.
Max.
Unit
Condition
—
20
—
20
—
—
20
—
20
mA
—
TTL DC ELECTRICAL CHARACTERISTICS
VCC = +3.3V ±10% or +5.0V ±10%
TA = –40°C
Symbol
Parameter
TA = 0°C
TA = +25°C
Min.
Max.
Min.
Max.
Min.
Typ.
TA = +85°C
Max.
Min.
Max.
Unit
Condition
VIH
Input HIGH Voltage
2.0
—
2.0
—
2.0
—
2.0
—
V
—
VIL
Input LOW Voltage
—
0.8
—
0.8
—
0.8
—
0.8
V
—
IIH
Input HIGH Current
—
—
20
100
—
—
20
100
—
—
20
100
—
—
20
100
µA
VIN = 2.7V
VIN = VCC
IIL
Input LOW Current
—
–0.2
—
–0.2
—
–0.2
—
–0.2
mA
VIN = 0.5V
VIK
Input Clamp Voltage
—
–1.2
—
–1.2
—
–1.2
—
–1.2
V
IIN = –18mA
Unit
Condition
PECL DC ELECTRICAL CHARACTERISTICS
VCC = +3.3V ±10% or +5.0V ±10%
TA = –40°C
Symbol
VOH
VOL
Parameter
Output HIGH
TA = 0°C
TA = +25°C
TA = +85°C
Min.
Max.
Min.
Max.
Min.
Typ.
Max.
Min.
Max.
10ELT 3920
100ELT 3915
4110
4120
3980
3975
4160
4120
4020
3975
—
—
4190
4120
4090
3975
4280
4120
3350
3445
3050
3190
3370
3380
3050
3190
—
—
3370
3380
3050
3190
3405
3380
Voltage(1)
mV
Output LOW Voltage(1)
10ELT 3050
100ELT 3170
mV
NOTES:
1. These values are for VCC = 5.0V. Level Specifications will vary 1:1 with VCC.
2
ClockWorks™
SY10ELT20V
SY100ELT20V
Micrel
AC ELECTRICAL CHARACTERISTICS(1)
VCC = +3.3V ±10% or +5.0V ±10%
TA = –40°C
Symbol
Parameter
TA = 0°C
TA = +25°C
TA = +85°C
Min.
Max.
Min.
Max.
Min.
Typ.
Max.
Min.
Max. Unit
tPLH
tPHL
Propagation Delay(1)
100
600
100
600
100
—
600
100
600
ps
50Ω to VCC – 2.0V
tskpp
Part-to-Part Skew(2)
—
500
—
500
—
—
500
—
500
ps
50Ω to VCC – 2.0V
fMAX
Maximum Input Frequency
350
—
350
—
350
—
—
350
—
MHz
50Ω to VCC – 2.0V
tr
tf
Output Rise/Fall Time
(20% to 80%)
200
500
200
500
200
—
500
200
500
ps
50Ω to VCC – 2.0V
NOTE:
1. Input Rise Time < 1.0ns.
2. Guaranteed by design. Not tested in production.
PRODUCT ORDERING INFORMATION
Ordering
Code
Package
Type
Operating
Range
SY10ELT20VZC
Z8-1
Commercial
SY10ELT20VZCTR
Z8-1
Commercial
SY100ELT20VZC
Z8-1
Commercial
SY100ELT20VZCTR
Z8-1
Commercial
3
Condition
ClockWorks™
SY10ELT20V
SY100ELT20V
Micrel
8 LEAD SOIC .150" WIDE (Z8-1)
Rev. 03
MICREL-SYNERGY
TEL
3250 SCOTT BOULEVARD SANTA CLARA CA 95054 USA
+ 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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