SK10/100ELT25W
Differential ECL to CMOS/TTL or
LVECL to LVCMOS/LVTTL Translator
HIGH-PERFORMANCE PRODUCTS
Description
The SK10/100ELT25W is a differential ECL to CMOS/
TTL or LVECL to LVCMOS/LVTTL Translator. Because
ECL levels are used, a +5.5V / +3.0V, –5.5V / –3.0V,
and ground supplies are required. The SK10/
100ELT25W is fuctionally compatible with MC10/
100ELT25.
The small outline 8 pin SOIC package and the single gate
of the SK10/100ELT25W make this device ideal for those
applications where space, performance, and low power
are extremely important.
The V
BB
output allows the ELT25W to also be used in
either single-ended or AC coupled mode. The V
BB
output
should be used only as a bias for the ELT25W as its current
sink/source capability is limited. When used, V
BB
should
be bypassed to ground via a 0.01 µF capacitor.
Under open input conditions, the pull down resistor
on D, and pulldown and pullup resistors on D* will
force the Q output to a TTL low.
Features
•
•
•
•
•
•
•
•
•
•
•
•
•
Extended Supply Voltage Range (VEE = –5.5V to
–3.0V and VCC = +3.0V to +5.5V)
High Bandwidth Output Transition
2.6 ns Typical Propagation Delay
V
BB
Output
Internal Input Resistors: Pulldown on D, Pulldown
and Pullup on D*
Q Output will Default Low with Inputs Open or at
V
EE
New Differential Input Common Mode Range
Fuctionally Compatible with MC10/100ELT25
ESD Protection of >4000V
Industrial Temperature Range: –40
o
C to 85
o
C
Available in 8 pin SOIC (150 mils) Package
Flammability Rate: UL-94 code V-0
Moisture Sensitivity: Level 1
Functional Block Diagram
PIN Names
Pin
D, D*
Function
Differential ECL Inputs
TTL Output
Positive Supply
Negative Supply
Reference Output Voltage
Ground
VEE
1
8
VCC
Q
V
CC
D
TTL
2
7
Q
V
EE
V
BB
ECL
GND
D*
3
6
NC
VBB
4
5
GND
Revision 1/October 16, 2001
1
www.semtech.com
SK10/100ELT25W
HIGH-PERFORMANCE PRODUCTS
Package Information
8 Lead SOIC Package
TOP VIEW
A
D
END VIEW
C
8
5
E
1
4
H
0.25 M
B M
B
e
h x 45
o
q
A
C
Seating
Plane
0.10
L
A1
B
0.25
M
C B
S
A
S
MILLIMETERS
DIM
A
A1
B
C
D
E
e
H
h
L
q
MIN
1.35
0.10
0.33
0.19
4.80
3.80
MAX
1.75
0.25
0.51
0.25
5.00
4.00
1.27 BSC
5.80
0.25
0.40
0
o
6.20
0.50
1.27
8
o
NOTES:
1. Dimensions are in millimeters.
2. Dimensions D and E do no include mold protrusion.
3. Maximum mold protrusion 0.15 per side.
4. Dimension B does not include Dambar protrusion.
Allowable Dambar protrusion shall be 0.127 total
in excess of the B dimension at maximum material
condition.
Revision 1/October 16, 2001
2
www.semtech.com
SK10/100ELT25W
HIGH-PERFORMANCE PRODUCTS
DC Characteristics
SK10/100ELT25W TTL Output DC Electrical Characteristics
(V
CC
= +3.0V to +5.5V; V
EE
= -3.0V to -5.5V;
T
A
= –40
o
C to 85
o
C)
(Note 4)
Symbol
V
OH
V
OL
I
CC
Characteristic
O u t p u t H I G H Vo l t a g e
O u t p u t L O W Vo l t a g e
Po we r S u p p l y C u r r e n t
20
Min
V
CC
-
0.5
0.5
37
Ty p
Max
Unit
V
V
mA
Condition
I
OH
= - 3 mA
I
OL
= 8 mA
SK10/100ELT25W ECL Input DC Electrical Characteristics
(V
CC
= +3.0V to +5.5V; V
EE
= -3.0V to -5.5V)
(Note 4)
TA = - 4 0
o
C
Symbol
Characteristic
I n p u t R e f e r e n c e Vo l t a g e
5
1 0 E LT
1 0 0 E LT
N e g a t i v e Po w e r S u p p l y C u r r e n t
I n p u t C u r r e n t D, D * ( D i f f )
Min
Max
TA = 0
o
C
Min
Max
TA = + 2 5
o
C
Min
Max
TA = + 8 5
o
C
Min
Max
Unit
V
BB
-1430
-1430
5
-150
-1300
-1260
16
150
-1380
-1430
5
-150
-1270
-1260
16
150
-1350
-1430
5
-150
-1250
-1260
16
150
-1310
-1430
5
-150
-1190
-1260
16
150
mV
mV
mA
µA
I
EE
I
IN
AC Characteristics
SK10/100ELT25W AC Electrical Characteristics
(V
CC
= +3.0V to +5.5V; V
EE
= -3.0V to -5.5V)
(Note 4)
TA = - 4 0
o
C
Sy mbol
f
max
t
PLH
t
P HL
V
PP
V
CMR
Characteri sti c
M a x i m u m To g g l e
Fr e q u e n c y
P r o p a g a t i o n D e l ay
(C
L
= 20 pF)
Mi ni mum I nput Swi ng
Common Mode Range
1
O u t p u t R i s e / Fa l l
Ti mes
(1V to 2V)
Mi n
180
2.3
200
VEE
+ 2.2
305
4.3
1000
GND
Ty p
Ma x
Mi n
180
2.2
200
VEE
+ 2.2
305
3.6
1000
GND
TA = 0
o
C
Ty p
Max
TA = + 2 5
o
C
Mi n
180
2.0
200
VEE
+ 2.2
305
3.5
1000
GND
Ty p
Ma x
TA = + 8 5
o
C
Mi n
180
1.8
200
VEE
+ 2.2
305
3.2
1000
GND
Ty p
Max
Uni t
MHz
ns
mV
V
ps
t
r
, t
f
1423
1423
1423
1423
Revision 1/October 16, 2001
3
www.semtech.com
SK10/100ELT25W
HIGH-PERFORMANCE PRODUCTS
AC Characteristics
(continued)
Notes:
1. CMR range is referenced to the most positive side of the differential input signal. Normal operation
is obtained if the high level falls within the specified range and the peak-to-peak voltage lies between
VPP
(min)
and 1V. The lower end of the CMR range varies 1:1 with VEE and is equal to VEE + 2.2V.
2. For part ordering description, see HPP Part Ordering Information Data Sheet.
3. Power supply sequencing is in the following order: VEE, VCC, then GND.
4. Test condition for VBB output: not loaded or VBB output left floating.
Ordering Information
Ordering Code
SK10ELT25WD
SK10ELT25WDT
SK100ELT25WD
SK100ELT25WDT
SK10ELT25WU
SK100ELT25WU
Package ID
8-SOIC
8-SOIC
8-SOIC
8-SOIC
Die
Die
Temperature Range
Industrial
Industrial
Marking Information
8 PIN SOIC PACKAGE
Function / Voltage &
Device Operation
Function Code / Part Number
Industrial
Industrial
H = 10
K = 100
E
L
Assembly
Lot Number
Y
Y
W
W
YY: Last two digits of the Year
WW: Working Week
Contact Information
Division Headquarters
10021 Willow Creek Road
San Diego, CA 92131
Phone: (858) 695-1808
FAX: (858)695-2633
Semtech Corporation
High-Performance Products Division
Marketing Group
1111 Comstock Street
Santa Clara, CA 95054
Phone: (408) 566-8776
FAX: (408) 727-8994
Revision 1/October 16, 2001
4
www.semtech.com
京公网安备 11010802033920号
EEWORLD
