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SY10ELT28ZG

P1-P3P4-P6P7-P7
1
DESCRIPTION
■ Guaranteed AC parameters over temperature:
•f
MAX
> 160MHz (TTL)
• < 5.5ns PECL-to-TTL propagation delay
• < 1.5ns t
r
/t
f
; PECL output
• < 1.3ns TTL-to-PECL propagation delay
■ Wide temperature range: –40°C to +85°C
■ 5V power supply
■ Q
TTL
output will default low with inputs left open
or < 1.3V
■ Q
ECL
output will default high with inputs left open
■ Internal PECL input pulldown resistors
■ Available in 8-pin MSOP and SOIC packages
The SY10/100ELT28 is a differential PECL-to-TTL
translator and a TTL-to-differential PECL translator in a
single package. Because PECL (Positive ECL) levels are
used, only +5V and ground are required. The small outline
8-pin package and the dual translation design of the
ELT28 makes it ideal for applications which are sending
and receiving signals across a backplane.
FEATURES
PIN CONFIGURATION/BLOCK DIAGRAM
PIN NAMES
5V TTL-TO-DIFFERENTIAL PECL
AND DIFFERENTIAL PECL-TO-TTL
TRANSLATOR
1DECL
/DECL
QECL
/QECL
8VCC
QTTL
DTTL
GND
7
6
5
2
3
4
PECL TTL
TOP VIEW
(Available in MSOP or SOIC package)
Pin Function
DTTL TTL Inputs
QTTL TTL Outputs
DECL, /DECL PECL Differential Inputs
QECL, /QECL PECL Differential Outputs
V
CC
Positive Supply
GND Ground
SY10ELT28
SY100ELT28
FINAL
Rev.: B Amendment: /0
Issue Date:
February 2003
NOT RECOMMENDED FOR NEW DESIGNS
2
SY10ELT28
SY100ELT28
Micrel
Symbol Rating Value Unit
V
CC
Power Supply Voltage –0.5 to +7.0 V
V
IN
Input Voltage 0 to +6.0 V
I
OUT
PECL Output Current –Continuous 50 mA
–Surge 100
T
A
Operating Temperature Range –40 to +85 °C
T
store
Storage Temperature Range –65 to +150 °C
θ
JA
Package Thermal Resistance –Still-Air (SOIC) 160 °C/W
(Junction-to-Ambient) –500lfpm (SOIC) 109
–Still-Air (MSOP) 206 °C/W
–500lfpm (MSOP) 155
θ
JC
Package Thermal Resistance (SOIC) 39 °C/W
(Junction-to-Case) (MSOP) 39
ABSOLUTE MAXIMUM RATINGS
(1)
T
A
= –40°CT
A
= +25°CT
A
= +85°C
Symbol Parameter Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit Condition
V
CC
Power Supply Voltage 4.75 5.0 5.5 4.75 5.0 5.5 4.75 5.0 5.5 V
I
CC
Power Supply Current — 23 40 — 22 40 — 25 40 mA
C
IN
Input Capacitance (SOIC) — — — — 0.75 ————pF
(MSOP) — — — — 1.1 ————pF
DC ELECTRICAL CHARACTERISTICS
(1)
V
CC
= +5V ±10%; V
EE
= 0V
NOTE:
1. 10/100KELT circuits are designed to meet the DC specifications shown in the above table after thermal equilibrium has been established. The circuit is
in a test socket or mounted on a printed circuit board and traverse airflow greater than 500lfpm is maintained. Input and output parameters vary 1:1 with
V
CC
. V
CC
can vary ±0.25V.
T
A
= –40°CT
A
= +25°CT
A
= +85°C
Symbol Parameter Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit Condition
V
OH
Output HIGH Voltage 3920 4010 4110 4020 4105 4190 4090 4185 4280 mV
50Ω V
CC
–2V
V
OL
Output LOW Voltage 3050 3200 3350 3050 3210 3370 3050 3227 3405 mV
50Ω V
CC
–2V
V
IH
Input HIGH Voltage 3770 — 4110 3870 — 4190 3940 — 4280 mV
(Single-Ended)
V
IL
Input LOW Voltage 3050 — 3500 3050 — 3520 3050 — 3555 mV
(Single-Ended)
V
IHCMR
Input HIGH Voltage
1.2 — V
CC
1.2 — V
CC
1.2 — V
CC
mV
Common Mode Range
(2)
10K PECL DC ELECTRICAL CHARACTERISTICS
(1)
V
CC
= +5.0V ±10%
NOTES:
1. 10/100KELT circuits are designed to meet the DC specifications shown in the above table after thermal equilibrium has been established. The circuit is
in a test socket or mounted on a printed circuit board and traverse airflow greater than 500lfpm is maintained.
2. V
IHCMR
(Min) varies 1:1 with GND, V
IHCMR
(Max) varies 1:1 with V
CC
.
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.
3
SY10ELT28
SY100ELT28
Micrel
T
A
= –40°CT
A
= +25°CT
A
= +85°C
Symbol Parameter Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit Condition
V
OH
Output HIGH Voltage 3915 3995 4120 3975 4045 4120 3975 4050 4120 mV
50Ω V
CC
–2V
V
OL
Output LOW Voltage 3170 3305 3445 3190 3295 3380 3190 3295 3380 mV
50Ω V
CC
–2V
V
IH
Input HIGH Voltage 3835 — 4120 3835 — 4120 3835 — 4120 mV
(Single-Ended)
V
IL
Input LOW Voltage 3190 — 3525 3190 — 3525 3190 — 3525 mV
(Single-Ended)
V
IHCMR
Input HIGH Voltage 2.2 — V
CC
2.2 — V
CC
2.2 — V
CC
V
Common Mode Range
(2)
100K PECL DC ELECTRICAL CHARACTERISTICS
(1)
V
CC
= +5.0V ±10%
NOTES:
1. 10/100KELT circuits are designed to meet the DC specifications shown in the above table after thermal equilibrium has been established. The circuit is
in a test socket or mounted on a printed circuit board and traverse airflow greater than 500lfpm is maintained.
2. V
IHCMR
(Min) varies 1:1 with GND, V
IHCMR
(Max) varies 1:1 with V
CC
.
T
A
= –40°CT
A
= +25°CT
A
= +85°C
Symbol Parameter Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit Condition
I
IH
Input HIGH Current — 10 20 — — 20 — — 20 µA
V
IN
= 2.7V
— — 100 — — 100 — — 100 µA
V
IN
= V
CC
I
IL
Input LOW Current — — –600 — — –600 — — –600 µA
V
IN
= 0.5V
V
IH
Input HIGH Voltage 2.0 — — 2.0 — — 2.0 — — V
V
IL
Input LOW Voltage — — 0.8 — — 0.8 — — 0.8 V
V
IK
Input Clamp Diode Voltage — — –1.2 — — –1.2 — — –1.2 V
I
IK
= –18mA
V
OH
Output HIGH Voltage 2.4 2.9 — 2.4 3.4 — 2.4 3.9 — V
I
OH
= –3.0mA
V
OL
Output LOW Voltage — 0.29 0.5 — 0.26 0.5 — 0.27 0.5 V
I
OL
= 24mA
I
OSC
Output Short-Circuit Current –175 — –60 –175 — –60 –175 — –60 µA
V
O
= 0V
TTL DC ELECTRICAL CHARACTERISTICS
(1)
V
CC
= +5.0V ±10%
NOTES:
1. 10/100KELT circuits are designed to meet the DC specifications shown in the above table after thermal equilibrium has been established. The circuit is
in a test socket or mounted on a printed circuit board and traverse airflow greater than 500lfpm is maintained.
P1-P3P4-P6P7-P7

SY10ELT28ZG

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IC TRNSLTR UNIDIRECTIONAL 8SOIC
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