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Motorola Electronic Components Datasheet

MC100ELT28 Datasheet

TTL to Differential Pecl/Differential PECL to TTL Translator

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MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Advance Information
TTL to Differential PECL/Differ-
ential PECL to TTL Translator
The MC10ELT/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-lead SOIC package and the dual translation design of the
ELT28 makes it ideal for applications which are sending and receiving
signals across a backplane. Because the mature MOSAIC 1.5 process is
used, low cost can be added to the list of features.
The ELT28 is available in both ECL standards: the 10ELT is compatible
with positive MECL 10H logic levels while the 100ELT is compatible with
positive ECL 100K logic levels.
3.5ns Typical PECL to TTL Propagation Delay
1.2ns Typical TTL to PECL Propagation Delay
Differential PECL Inputs/Ouputs
Small Outline SOIC Package
PNP TTL Inputs for Minimal Loading
24mA TTL Outputs
Flow Through Pinouts
LOGIC DIAGRAM AND PINOUT ASSIGNMENT
DECL 1
DECL 2
PECL
QECL 3
8 VCC
7 QTTL
TTL
6 DTTL
QECL 4
5 GND
MC10ELT28
MC100ELT28
8
1
D SUFFIX
PLASTIC SOIC PACKAGE
CASE 751-05
PIN DESCRIPTION
PIN
QTTL
DTTL
QECL
DECL
VCC
GND
FUNCTION
TTL Output
TTL Inputs
Diff ECL Outputs
Diff ECL Inputs
+5.0V Supply
Ground
MAXIMUM RATINGS*
Symbol
Parameter
Value
Unit
VCC
DC Supply Voltage (Referenced to GND)
7.0 V
TA Operating Temperature Range (In Free-Air)
–40 to 85
°C
TSTG
Storage Temperature Range
–55 to +150
°C
* Maximum Ratings are those values beyond which damage to the device may occur. Functional operation should be restricted to the
Recommended Operating Conditions.
This document contains information on a new product. Specifications and information herein are subject to
change without notice.
1/95
© Motorola, Inc. 1996
3–1
REV 2


Motorola Electronic Components Datasheet

MC100ELT28 Datasheet

TTL to Differential Pecl/Differential PECL to TTL Translator

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MC10ELT28 MC100ELT28
TTL OUTPUT DC CHARACTERISTICS (VCC = 4.75V to 5.25V; TA = –40°C to 85°C)
Symbol
Characteristic
Min Typ Max
VOH
VOL
ICCH
ICCL
IOS
Output HIGH Voltage
Output LOW Voltage
Power Supply Current
Power Supply Current
Output Short Circuit Current
2.4
–150
27
29
0.5
40
42
–60
Unit Condition
V IOH = –3.0mA
V IOL = 24mA
mA
mA
mA
TTL INPUT DC CHARACTERISTICS (VCC = 4.75V to 5.25V; TA = –40°C to 85°C)
Symbol
Characteristic
Min Typ
IIH
IIHH
IIL
VIK
VIH
VIL
Input HIGH Current
Input HIGH Current
Input LOW Current
Input HIGH Voltage
Input LOW Voltage
2.0
Max
20
100
–0.6
–1.2
0.8
Unit Condition
µA VIN = 2.7V
µA VIN = 7.0V
mA VIN = 0.5V
V IIN = –18mA
V
V
PECL OUTPUT DC CHARACTERISTICS (VCC = 4.75V to 5.25V; TA = –40°C to 85°C)
–40°C
0°C
25°C
85°C
Symbol
Characteristic
Min Max Min Max Min Typ Max Min Max Unit Condition
VOH
Output HIGH 10ELT1 3.920 4.11 3.980 4.16 4.020 4.10 4.19 4.080 4.27 V VCC = 5.0V
Voltage
100ELT1 3.915 4.12 3.975 4.12 3.975 4.05 4.12 3.975 4.12
VOL
Output LOW 10ELT1 3.05 3.350 3.05 3.37 3.05 3.25 3.37 3.05 3.40 V VCC = 5.0V
Voltage
100ELT1 3.17 3.445 3.19 3.38 3.19 3.30 3.38 3.19 3.35
1. Levels will vary 1:1 with VCC.
PECL INPUT DC CHARACTERISTICS (VCC = 4.75V to 5.25V; TA = –40°C to 85°C)
–40°C
0°C
25°C
85°C
Symbol
Characteristic
Min Max Min Max Min Typ Max Min Max
IIH
IIL
VCMR
VPP
Input HIGH Current
150 150
Input LOW Current
0.5
0.5
0.5
Common Mode Range 2.2 VCC 2.2 VCC 2.2
Minimum
200 200 200
Peak-to-Peak Input1
150 150
0.5
VCC 2.2 VCC
200
VIH Input HIGH 10ELT 3.770 4.110 3.830 4.16 3.870
Voltage
100ELT 3.835 4.120 3.835 4.12 3.835
4.19 3.930 4.265
4.12 3.835 4.120
VIL
Input LOW
10ELT 3.05 3.500 3.05 3.520 3.05
Voltage
100ELT 3.19 3.525 3.19 3.525 3.19
3.520 3.05 3.550
3.525 3.19 3.525
tPLH
Prop DECL to QTTL 2.0 5.5 2.0 5.5 2.0
5.5 2.0 5.5
Delay DTTL to QECL 0.6 1.2 0.65 1.45 0.9 1.2 1.5 0.6 1.35
tPHL
Prop DECL to QTTL 2.0 5.5 2.0 5.5 2.0
5.5 2.0 5.5
Delay DTTL to QECL 0.4 1.0 0.45 1.05 0.5 0.8 1.1 0.7 1.3
tr, tf Rise/Fall Times QECL 0.15 1.5 0.15 1.5 0.15
1. 200mV input guarantees full logic swing at the output.
1.5 0.15 1.5
Unit
µA
µA
V
mV
V
V
ns
ns
ns
Condition
VCC = 5.0V
VCC = 5.0V
CL = 20pF
CL = 20pF
20% – 80%
MOTOROLA
3–2 ECLinPS and ECLinPS Lite
DL140 — Rev 3


Part Number MC100ELT28
Description TTL to Differential Pecl/Differential PECL to TTL Translator
Maker Motorola
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MC100ELT28 Datasheet PDF






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