1
Precision EdgeTM
SY89321L
Micrel
DESCRIPTION
s
3.3V power supply
s
1.9ns typical propagation delay
s
275MHz f
MAX
(clock bit stream, not pseudo-random)
s
Differential LVPECL inputs
s
24mA LVTTL outputs
s
Flow-through pinouts
s
Internal input resistors: pulldown on IN, pulldown
and pullup on /IN
s
Q output will default LOW with inputs open
s
V
BB
output
s
Available in ultra-small 8-pin MLFTM
(2mm x 2mm)
package
FEATURES
Precision EdgeTM
SY89321L
Rev.: A
Amendment: /0
Issue Date:
August 2003
The SY89321L is a differential LVPECL-to-LVTTL
translator requiring only a single +3.3V power. Because
LVPECL (Low Voltage Positive ECL) levels are used, only
+3.3V and ground are required. The SY89321L is functionally
equivalent to the SY100EPT21L, but in an ultra-small
8-lead MLFTM package that features a 70% smaller footprint.
This ultra-small package and low skew single gate design
make the SY89321L ideal for applications that require the
translation of a clock or data signal where minimal space,
low power and low cost are critical.
V
BB
allows a differential, single-ended, or AC-coupled
interface to the device. If used, the V
BB
output should be
bypassed to V
CC
with 0.01
F capacitor.
Under open input conditions, the /IN will be biased at
a V
CC
/2 voltage level and the IN input will be pulled to
ground. This condition will force the Q output low to
provide added stability.
The SY89321L is compatible with positive ECL 100k
logic levels.
Precision EdgeTM
Precision Edge is a trademark of Micrel, Inc.
Micro
LeadFrame and MLF are trademarks of Amkor Technology, Inc.
3.3V DIFFERENTIAL
LVPECL-to-LVTTL
TRANSLATOR
BLOCK DIAGRAM
LVPECL
IN
/IN
Q
LVTTL
2
Precision EdgeTM
SY89321L
Micrel
PIN DESCRIPTION
Pin Number
Pin Name
Type
Pin Function
1,6
NC
No connection.
2
IN
100K LVPECL
Differential PECL Input: Internal 75k
pull-down resistor. If left open, pin
Input
defaults LOW. Q output will be LOW. See
"Input Interface Applications"
section for single-ended inputs.
3
/IN
100K LVPECL
Differential PECL Input: Internal 75k
pull-up and pull-down resistors.
Input
If left floating, pin defaults to V
CC
/2. When not used, this input can be left
open. See
"Input Interface Applications"
section for single-ended inputs.
4
VBB
Reference
Bias Reference Voltage: V
CC
1.3V. Used as reference voltage for single-
Voltage Output
ended inputs or AC-coupling to the IN, /IN inputs. Limit sink / source
0.5mA.
5
GND,
Ground
GND and Exposed pad must be tied to ground plane.
Exposed Pad
7
Q
LVTTL Output
Single-ended LVTTL Output: Defaults to LOW if IN inputs left open.
8
VCC
Positive
Positive Power Supply: Bypass with 0.1
F//0.01
F low ESR capacitors.
Power Supply
PACKAGE/ORDERING INFORMATION
Ordering Information
Package
Operating
Package
Part Number
Type
Range
Marking
SY89321LMITR
(1)
MLF-8
Industrial
321
Note 1.
Tape and Reel.
NC
IN
/IN
LVTTL
VBB
VCC
Q
NC
LVPECL
GND
1
2
3
4
8
7
6
5
8-Pin MLFTM
Ultra-Small Outline (2mm x 2mm)
3
Precision EdgeTM
SY89321L
Micrel
Absolute Maximum Ratings
(Note 1)
Supply Voltage (V
CC
) .................................. 0.5V to +3.8V
Input Voltage (V
IN
) ......................................... 0.5V to V
CC
LVTT Output Current (I
OUT
)
Continuous ............................................................. 50mA
Surge .................................................................... 100mA
Current (V
BB
)
Source or sink current on V
BB
, Note 3 ................
1.5mA
Lead Temperature (soldering, 10 sec.) ................... +220
C
Storage Temperature (T
S
) ....................... 65
C to +150
C
Operating Ratings
(Note 2)
Supply Voltage (V
CC
) ...................................... 3.0V to 3.6V
Ambient Temperature (T
A
) ......................... 40
C to +85
C
Package Thermal Resistance, Note 4
MLFTM (
JA
)
Still-Air ................................................................. 93
C/W
500lfpm ............................................................... 87
C/W
MLFTM (
JB
)
Junction-to-Board ................................................ 60
C/W
V
CC
= +3.3V
10%
Symbol
Parameter
Condition
Min
Typ
Max
Units
I
OS
Output Short Circuit Current
V
OUT
= 0V, Note 5
80
--
275
mA
I
CC
Power Supply Current
--
14
20
mA
V
OH
Output HIGH Voltage
I
OH
= 3.0mA
2.0
--
--
V
V
OL
Output LOW Voltage
I
OL
= 24mA
--
--
0.5
V
LVTTL DC ELECTRICAL CHARACTERISTICS
V
CC
= +3.3V
10%; T
A
= 40
C to +85
C unless otherwise noted.
Symbol
Parameter
Condition
Min
Typ
Max
Units
V
IH
Input HIGH Voltage
V
CC
1.165
--
V
CC
0.880
V
V
IL
Input LOW Voltage
V
CC
1.810
--
V
CC
1.475
V
V
BB
Bias Voltage
V
CC
1.38 V
CC
1.32
V
CC
1.26
V
I
IH
Input HIGH Current
--
--
150
A
I
IL
Input LOW Current IN
0.5
--
--
A
Input LOW Current /IN
300
--
--
A
LVPECL DC ELECTRICAL CHARACTERISTICS
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.
Note 2.
The data sheet limits are not guaranteed if the device is operated beyond the operating ratings.
Note 3.
Due to the limited drive capability use for input of the same package only.
Note 4.
Package thermal resistance assumes exposed pad is soldered (or equivalent) to the devices most negative potential (GND) on the PCB.
Note 5.
Max. limit only applicable for short durations, not for continuous operation!
4
Precision EdgeTM
SY89321L
Micrel
V
CC
= +3.3V
10%; C
L
= 20pF, T
A
= 40
C to +85
C unless otherwise noted.
Symbol
Parameter
Condition
Min
Typ
Max
Units
f
MAX
Maximum Input Frequency
Note 6
275
--
--
MHz
t
pd
Propagation Delay
1.5
1.9
2.5
ns
t
skpp
Part-to-Part Skew
V
IN
100mV, Note 7
--
--
0.5
ns
V
CMR
Common Mode Range
1.2
--
V
CC
V
V
PP
Minimum Peak-to-Peak Input
Note 8
100
--
--
mV
t
r
Output Rise/Fall Time
0.5
--
1.0
ns
t
f
(1.0V to 2.0V)
t
JITTER
Cycle-to-cycle (rms)
Note 9
2
ps
rms
Total jitter (pk-pk)
Note 10
15
ps
pk-pk
Note 6.
The f
MAX
value is specified as the minimum guaranteed maximum frequency (While maintaining TTL swing of 0.8V to 2.0V). Actual opera-
tional maximum frequency may be greater.
Note 7.
Part-to-Part Skew considering HIGH-to-HIGH transitions at common V
CC
level.
Note 8.
V
PP
(min) is the minimum input swing for which AC parameters are guaranteed.
Note 9.
Cycle-to-cycle jitter definition: The variation of periods between adjacent cycles, T
n
T
n1
,where T is the time between rising edges of the
output signal.
Note 10. Total jitter definition: with an ideal clock input of frequency
f
MAX
, no more than one output edge in 10
12
output edge will deviate by more than
the specified peak-to-peak jitter value.
AC ELECTRICAL CHARACTERISTICS
INPUT INTERFACE APPLICATIONS
IN
V
CC
/IN
SY89321L
VBB
0.01
F
Single-Ended Input
(Terminating unused input)
5
Precision EdgeTM
SY89321L
Micrel
MICREL, INC.
1849 FORTUNE DRIVE
SAN JOSE, CA 95131
USA
TEL
+ 1 (408) 944-0800
FAX
+ 1 (408) 944-0970
WEB
http://www.micrel.com
The information furnished by Micrel in this datasheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its use.
Micrel reserves the right to change circuitry and specifications at any time without notification to the customer.
Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can
reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into
the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser's
use or sale of Micrel Products for use in life support appliances, devices or systems is at Purchaser's own risk and Purchaser agrees to fully indemnify
Micrel for any damages resulting from such use or sale.
2003 Micrel, Incorporated.
8 LEAD ULTRA-SMALL EPAD-
MicroLeadFrameTM (MLF-8)
Package
EP- Exposed Pad
Die
CompSide Island
Heat Dissipation
Heavy Copper Plane
Heavy Copper Plane
V
EE
V
EE
Heat Dissipation
PCB Thermal Consideration for 8-Pin MLFTM Package
Package Notes:
Note 1.
Package meets Level 2 qualification.
Note 2.
All parts are dry-packaged before shipment.
Note 3.
Exposed pads must be soldered to a ground for proper thermal management.
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