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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
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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
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Micrel
SY100ELT24
TTL DC ELECTRICAL CHARACTERISTICS
VCC = 4.5V to 5.5V; VEE = –4.2V to –5.5V
T
A = –40°CTA = 0°CTA = +25°CTA = +85°C
Symbol Parameter Min. Max. Min. Max. Min. 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 —
IH Input HIGH Current — 20 — 20 — 20 — 20 µAVIN = 2.7V
I
— 100 — 100 — 100 — 100 VIN = VCC
IIL Input LOW Current —–0.6 —–0.6 —–0.6 —–0.6 mA VIN = 0.5V
IK Input Clamp Voltage —–1.2 —–1.2 —–1.2 —–1.2 V IIN = –18mA
V
ECL 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
VOH Output HIGH Voltage –1085 –880 –1025 –880 –1025 –880 –1025 –880 mV 50Ω to –2.0V
V
OL Output LOW Voltage –1830 –1555 –1810 –1620 –1810 –1620 –1810 –1620 mV 50Ω to –2.0V
PRODUCT ORDERING CODE
Ordering Package Operating
Code Type Range
SY100ELT24ZC Z8-1 Commercial
SY100ELT24ZCTR Z8-1 Commercial
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Micrel
8 LEAD SOIC .150" WIDE (Z8-1)
SY100ELT24
Rev. 03
MICREL-SYNERGY 3250 SCOTT BOULEVARD SANTA CLARA CA 95054 USA
TEL + 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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