MICREL SY100ELT25ZC

DIFFERENTIAL
ECL-to-TTL
TRANSLATOR
FEATURES
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■
■
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SY100ELT25
DESCRIPTION
2.6ns typical propagation delay
Differential ECL inputs
24mA TTL outputs
Flow-through pinouts
Available in 8-pin SOIC package
The SY100ELT25 is a differential ECL-to-TTL
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 ELT25
makes it ideal for those applications where performance,
space and low power are at a premium.
The VBB output allows the ELT25 to also be used in a
single-ended input mode. In this mode the VBB output is
tied to the D input for a non-inverting buffer or the D
input for an inverting buffer. If used the VBB pin should
be bypassed to ground via a 0.01µF capacitor.
PIN NAMES
PIN CONFIGURATION/BLOCK DIAGRAM
Pin
VEE
1
8
VCC
D
2
7
Q
D
3
6
NC
VBB
4
5
GND
Function
Q
TTL Output
D
Differential ECL Inputs
VCC
Positive Supply
VEE
Negative Supply
VBB
Reference Output
GND
Ground
SOIC
TOP VIEW
Rev.: A
1
Amendment: /0
Issue Date: October 1999
SY100ELT25
Micrel
ABSOLUTE MAXIMUM RATINGS(1)
Symbol
TRUTH TABLE
Value
Unit
D
D
Q
–0.5 to +7.0
V
L
H
L
VEE to GND+0.5
V
H
L
H
Open
Open
L
Paramter
VCC
Power Supply Voltage
VIN
ECL Input Voltage
VOUT
Voltage Applied to
Output at HIGH State
–0.5 to +5.5
V
IOUT
Current Applied to
Output at LOW State
Twice the
Rated IOL
mA
Tstore
Storage Temperature
–65 to +150
°C
TA
Operating Temperature
–40 to +85
°C
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°C
Symbol
Parameter
TA = 0°C
TA = +25°C TA = +85°C
Min. Max. Min. Max. Min. Max. Min. Max. Unit
Condition
ICC
Power Supply Current
—
14
—
14
9
14
—
14
mA
—
IEE
Power Supply Current
—
14
—
14
5.5
14
—
14
mA
—
AC ELECTRICAL CHARACTERISTICS
VCC = 4.5V to 5.5V; VEE = –4.2V to –5.5V
TA = –40°C
Symbol
Parameter
TA = 0°C
TA = +25°C
TA = +85°C
Min. Max. Min. Max. Min. Max. Min. Max. Unit
Condition
tPLH
tPHL
Propagation Delay
D to Output Q
1.7
3.6
1.7
3.6
1.7
3.6
1.7
3.6
ns
CL = 20pF
fMAX
Maximum Frequency
150
—
150
—
150
—
150
—
MHz
CL = 20pF
tr
tf
Output Rise/Fall Time
(1.0V to 2.0V)
—
1.5
—
1.5
—
1.5
—
1.5
ns
CL = 20pF
TTL DC ELECTRICAL CHARACTERISTICS
VCC = 4.5V to 5.5V; VEE = –4.2V to –5.5V
TA = –40°C
Symbol
Parameter
VOH
Output HIGH Voltage
VOL
Output LOW Voltage
IOS
Output Short Circuit Current
TA = 0°C
TA = +25°C
TA = +85°C
Min. Max. Min. Max. Min. Max. Min. Max. Unit
2.4
—
2.4
—
2.4
—
2.4
—
Condition
V
IOH = –3.0mA
—
0.5
—
0.5
—
0.5
—
0.5
V
IOL = 24mA
–60
–200
–60
–200
–60
–200
–60
–200
mA
VOUT = 0V
2
SY100ELT25
Micrel
ECL DC ELECTRICAL CHARACTERISTICS
VCC = 4.5V to 5.5V; VEE = –4.2V to –5.5V
TA = –40°C
Symbol
Parameter
Min.
—
TA = 0°C
Typ. Max.
—
Min.
TA = +25°C
Typ. Max.
150
—
—
—
0.5
—
Min.
TA = +85°C
Typ. Max.
—
—
µA
—
GND
V
200
—
—
mV
–1165
—
–880
mV
—
–1475 –1810
—
–1475
mV
—
–1.26
—
–1.26
mV
IIL
Input HIGH Current
0.5
—
VCMR
Common Mode Range
VEE+2.2
—
VPP
Minimum Peak-to-Peak
Input(1)
200
—
—
200
—
—
200
—
—
VIH
Input HIGH Voltage
–1165
—
–880
–1165
—
–880
–1165
—
–880
VIL
Input LOW Voltage
–1810
—
–1475 –1810
—
–1475 –1810
VBB
Reference Output
–1.38
—
–1.26
—
–1.26
–1.38
150
—
—
—
0.5
—
GND VEE+2.2
—
–1.38
150
—
—
—
0.5
GND VEE+2.2
NOTE:
1. 200mV input guarantees full logic at output.
TTL SWITCHING CIRCUIT
VEE
VCC
Use 0.1µF Capacitors
For Decoupling
50Ω COAX
IN
PULSE
GENERATOR
50Ω COAX
DEVICE
UNDER
TEST
OUT
450Ω
50Ω COAX
CH A
Use Oscilloscope Internal
50Ω Load For Termination
CH B
OSCILLOSCOPE
3
Unit
µA
Input HIGH Current
—
Typ. Max.
150
IIH
GND VEE+2.2
Min.
–1.38
SY100ELT25
Micrel
ECL/TTL PROPAGATION DELAY — SINGLE ENDED
50%
VIN
tPLH
tPHL
1.5V
VOUT
ECL/TTL WAVEFORMS: RISE AND FALL TIMES
2.0V
1V
VOUT
tf
tr
PRODUCT ORDERING CODE
Ordering
Code
4
Package
Type
Operating
Range
SY100ELT25ZC
Z8-1
Commercial
SY100ELT25ZCTR
Z8-1
Commercial
SY100ELT25
Micrel
8 LEAD SOIC .150" WIDE (Z8-1)
Rev. 03
MICREL-SYNERGY
TEL
3250 SCOTT BOULEVARD SANTA CLARA CA 95054 USA
+ 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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