MICREL SY100ELT24 Datasheet

TTL-to-DIFFERENTIAL
ECL TRANSLA TOR

SY100ELT24

FEATURES

■ 500ps typical propagation delay

■ Differential ECL output

■ PNP TTL input for minimal loading

■ Flow-through pinouts

■ Available in 8-pin SOIC package

PIN CONFIGURATION/BLOCK DIAGRAM

EE

V

NC

1

2

D

3

ECLTTL

V

CC

8

Q

7

Q

6

DESCRIPTION

The SY100ELT24 is a TTL-to-differential ECL
translator. Because ECL levels are used, a +5V, –5.2V
(or –4.5V) and ground are required. The small outline 8­lead SOIC package and the single gate of the ELT24
makes it ideal for those applications where performance,
space and low power are at a premium.

PIN NAMES

Pin Function

Q, Q Differential ECL Output
D TTL Input
VCC Positive Supply
VEE Negative Supply
GND Ground

NC

4

SOIC

TOP VIEW

GND

5

Rev.: A Amendment: /0

1

Issue Date: November 1999

Micrel

SY100ELT24

ABSOLUTE MAXIMUM RATINGS

(1)

Symbol Paramter Value Unit

VCC Power Supply Voltage –0.5 to +7.0 V
VI TTL Input Voltage –0.5 to VCC V
II TTL Input Current –30 to +5.0 mA

OUT ECL Output Current mA

I

TRUTH TABLE

DQ Q

HH L

LL H

Open H L

— Continuous 50
— Surge 100

Tstore Storage Temperature –65 to +150 °C

A Operating Temperature –40 to +85 °C

T

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 = 4.5V to 5.5V; VEE = –4.2V to –5.5V

TA = –40°CTA = 0°CTA = +25°CTA = +85°C

Symbol Parameter Min. Max. Min. Max. Min. Max. Min. Max. Unit Condition

ICC Power Supply Current — 10 — 10 — 10 — 10 mA —

EE Power Supply Current — 20 — 20 — 20 — 20 mA No output load

I

AC ELECTRICAL CHARACTERISTICS

VCC = 4.5V to 5.5V; VEE = –4.2V to –5.5V

TA = –40°CTA = 0°CTA = +25°CTA = +85°C

Symbol Parameter Min. Max. Min. Max. Min. Typ. Max. Min. Max. Unit Condition

PLH Propagation Delay 300 900 300 900 300 500 900 300 900 ps 50Ω to –2.0V

t
tPHL

tr Output Rise/Fall Time 200 700 200 700 200 300 700 200 700 ps 50Ω to –2.0V
tf 20% to 80%

MAX Maximum Input Frequency 200 — 200 — 200 ——200 — MHz

f

2