3.3V DUAL DIFFERENTIAL
LVPECL-to-LVTTL
TRANSLATOR
FEATURES
s
3.3V power supply
s
1.9ns typical propagation delay
s
Maximum frequency > 275MHz
s
Differential LVPECL inputs
s
24mA LVTTL outputs
s
Flow-through pinouts
s
Internal input resistors: pulldown on D, pulldown
and pullup on /D
s
Q output will default LOW with inputs open or at
Ground
s
Available in 8-pin MSOP and SOIC packages
SY100EPT23L
DESCRIPTION
The SY100EPT23L is a dual differential LVPECL-to-
LVTTL translator. Because LVPECL (Low Voltage Positive
ECL) levels are used, only +3.3V and ground are required.
The tiny 8-pin MSOP and dual-gate design of the EPT23L
makes it ideal for applications which require the
translation of a clock and data signal.
The EPT23L is available in only the ECL 100K
standard. Since there are no LVPECL outputs or an
external V
BB
reference, the EPT23L does not require
both ECL standard versions. The inputs can accept 10K
voltage levels and any standard differential LVPECL input
referenced from a V
CC
of +3.3V
PIN CONFIGURATION/BLOCK DIAGRAM
PIN NAMES
Pin
Function
LVTTL Outputs
Differential LVPECL Inputs
Positive Supply
Ground
D0 1
/D0 2
LVPECL
LVTTL
8 V
CC
7 Q0
6 Q1
5 GND
Q0, Q1
D0, /D0, D1, /D1
V
CC
GND
/D1 3
D1 4
(Available in 8-pin SOIC and 8-pin MSOP)
Rev.: A
Amendment: 1
1
Issue Date: July 2000
Micrel
SY100EPT23L
ABSOLUTE MAXIMUM RATINGS
(1)
Symbol
V
CC
V
I
V
O
I
O
T
store
T
A
Paramter
Power Supply Voltage
PECL Input Voltage
Voltage Applied to
Output at HIGH State
Current Applied to
Output at LOW State
Storage Temperature
Operating Temperature
Value
–0.5 to +3.8
0V to V
CC
+0.5
–0.5 to V
CC
Twice the
Rated I
OL
–65 to +150
–40 to +85
Unit
V
V
V
mA
°C
°C
TRUTH TABLE
D
L
H
Open
/D
H
L
Open
Q
L
H
L
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.
LVTTL DC ELECTRICAL CHARACTERISTICS
V
CC
= +3.3V
±5%
T
A
= –40
°
C
Symbol
V
OH
V
OL
I
CC
I
OS
Parameter
Output HIGH Voltage
Output LOW Voltage
Power Supply Current
Output Short Circuit Current
Min.
2.0
—
—
–80
Max.
—
0.5
30
–240
T
A
= 0
°
C
Min.
2.0
—
—
–80
Max.
—
0.5
30
–240
T
A
= +25
°
C
Min.
2.0
—
—
–80
Max.
—
0.5
30
–240
T
A
= +85
°
C
Min.
2.0
—
—
–80
Max.
—
0.5
30
–240
Unit
V
V
mA
mA
V
OUT
= 0V
Condition
I
OH
= –3.0mA
I
OL
= 24mA
LVPECL DC ELECTRICAL CHARACTERISTICS
V
CC
= +3.3V
±5%
T
A
= –40
°
C
Symbol
I
IH
I
IL
V
CMR
V
PP
V
IH
V
IL
Parameter
Input HIGH Current
Input LOW Current
Common Mode Range
Minimum Peak-to-Peak
Input
(1)
Input HIGH Voltage
(2)
Input LOW Voltage
(2)
Min.
—
0.5
1.5
200
2070
1350
Typ.
—
—
—
—
—
—
Max.
150
—
V
CC
—
2420
1825
Min.
—
0.5
1.5
200
2130
1350
T
A
= 0
°
C
Typ.
—
—
—
—
—
—
Max.
150
—
V
CC
—
2460
1825
—
0.5
1.5
200
2135
1350
T
A
= +25
°
C
Min.
Typ.
—
—
—
—
—
—
Max.
150
—
V
CC
—
2490
1825
—
0.5
1.5
200
2130
1350
T
A
= +85
°
C
Min.
Typ.
—
—
—
—
—
—
Max.
150
—
V
CC
—
2565
1825
Unit
µA
µA
V
mV
mV
mV
NOTES:
1. 200mV input guarantees full logic at output.
2. These values are for V
CC
= 3.3V. Level Specifications will vary 1:1 with V
CC
.
2
Micrel
SY100EPT23L
AC ELECTRICAL CHARACTERISTICS
V
CC
= +3.3V
±5%
T
A
= –40
°
C
Symbol
t
PLH
t
PHL
t
skpp
t
skew++
t
skew– –
t
r
t
f
f
MAX
Parameter
Propagation Delay
Part-to-Part Skew
(1,4)
Within-Device Skew
(2,4)
Within-Device Skew
(3,4)
Output Rise/Fall Time
1.0V to 2.0V
Maximum Input Frequency
(5,6)
Min.
1.5
—
—
—
0.5
275
Max.
2.5
0.5
0.3
0.3
1.0
—
T
A
= 0
°
C
Min.
1.5
—
—
—
0.5
275
Max.
2.5
0.5
0.3
0.3
1.0
—
T
A
= +25
°
C
Min.
1.5
—
—
—
0.5
275
Max.
2.5
0.5
0.3
0.3
1.0
—
T
A
= +85
°
C
Min.
1.5
—
—
—
0.5
275
Max.
2.5
0.5
0.3
0.3
1.0
—
Unit
ns
ns
ns
ns
ns
MHz
Condition
C
L
= 20pF
C
L
= 20pF
C
L
= 20pF
C
L
= 20pF
C
L
= 20pF
C
L
= 20pF
NOTES:
1. Device-to-Device Skew considering HIGH-to-HIGH transitions at common V
CC
level.
2. Within-Device Skew considering HIGH-to-HIGH transitions at common V
CC
level.
3. Within-Device Skew considering LOW-to-LOW transitions at common V
CC
level.
4. All skew parameters are guaranteed but not tested.
5. Frequency at which guaranteed for functionality. V
OH
and V
OL
levels are guaranteed at DC only.
6. The f
MAX
value is specified as the minimum guaranteed maximum frequency. Actual operational maximum frequency may be greater.
PRODUCT ORDERING CODE
Ordering
Code
SY100EPT23LZC
SY100EPT23LZCTR
SY100EPT23LKC
SY100EPT23LKCTR
Package
Type
Z8-1
Z8-1
K8-1
K8-1
Operating
Range
Commercial
Commercial
Commercial
Commercial
V
CC
Range
(V)
+3.3
±5%
+3.3
±5%
+3.3
±5%
+3.3
±5%
3
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