MICREL SY89321L

3.3V DIFFERENTIAL
LVPECL-to-LVTTL
TRANSLATOR
Micrel, Inc.
Precision Edge®
®
SY89321L
Precision Edge
SY89321L
FEATURES
■
■
■
■
■
■
■
3.3V power supply
1.9ns typical propagation delay
275MHz fMAX
Differential LVPECL inputs
24mA LVTTL outputs
Flow-through pinouts
Internal input resistors: pulldown on IN, pulldown
and pullup on /IN
■ Q output will default LOW with inputs open
■ VBB output
■ Available in ultra-small 8-pin MLF® (2mm x 2mm)
package
Precision Edge®
DESCRIPTION
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 MLF® 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.
VBB allows a differential, single-ended, or AC-coupled
interface to the device. If used, the VBB output should be
bypassed to VCC with 0.01µF capacitor.
Under open input conditions, the /IN will be biased at
a VCC/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.
BLOCK DIAGRAM
LVPECL
IN
Q
/IN
LVTTL
Precision Edge is a registered trademark of Micrel, Inc.
MicroLeadFrame and MLF are registered trademarks of Amkor Technology, Inc.
M9999-051006
[email protected] or (408) 955-1690
Rev.: C
1
Amendment: /0
Issue Date: May 2006
Precision Edge®
SY89321L
Micrel, Inc.
PACKAGE/ORDERING INFORMATION
Ordering Information
NC
IN
1
8
LVTTL
2
VCC
7
Q
6
NC
LVPECL
/IN
3
VBB
4
5
Package
Type
Operating
Range
SY89321LMITR
MLF-8
Industrial
321
Sn-Pb
SY89321LMGTR(1)
MLF-8
Industrial
321 with
Pb-Free bar-line indicator
Pb-Free
NiPdAu
Part Number
GND
8-Pin MLF®
Ultra-Small Outline (2mm x 2mm)
Package
Marking
Lead
Finish
Note:
1. Pb-Free package is recommended for new designs.
PIN DESCRIPTION
Pin Number
Pin Name
1,6
NC
2
IN
100K LVPECL
Input
Differential PECL Input: Internal 75kΩ pull-down resistor. If left open, pin
defaults LOW. Q output will be LOW. See “Input Interface Applications”
section for single-ended inputs.
3
/IN
100K LVPECL
Input
Differential PECL Input: Internal 75kΩ pull-up and pull-down resistors.
If left floating, pin defaults to VCC/2. When not used, this input can be left
open. See “Input Interface Applications” section for single-ended inputs.
4
VBB
Reference
Voltage Output
Bias Reference Voltage: VCC–1.3V. Used as reference voltage for singleended inputs or AC-coupling to the IN, /IN inputs. Limit sink / source ≤ 0.5mA.
5
GND,
Exposed Pad
Ground
7
Q
LVTTL Output
Single-ended LVTTL Output: Defaults to LOW if IN inputs left open.
8
VCC
Positive
Power Supply
Positive Power Supply: Bypass with 0.1µF//0.01µF low ESR capacitors.
M9999-051006
[email protected] or (408) 955-1690
Type
Pin Function
No connection.
GND and Exposed pad must be tied to ground plane.
2
Precision Edge®
SY89321L
Micrel, Inc.
Absolute Maximum Ratings(Note 1)
Operating Ratings(Note 2)
Supply Voltage (VCC) .................................. –0.5V to +3.8V
Input Voltage (VIN) ......................................... –0.5V to VCC
LVTT Output Current (IOUT)
Continuous ............................................................. 50mA
Surge .................................................................... 100mA
Current (VBB)
Source or sink current on VBB, Note 3 ................ ±1.5mA
Lead Temperature (soldering, 20 sec.) ................... +260°C
Storage Temperature (TS) ....................... –65°C to +150°C
Supply Voltage (VCC) ...................................... 3.0V to 3.6V
Ambient Temperature (TA) ......................... –40°C to +85°C
Package Thermal Resistance, Note 4
MLF® (θJA)
Still-Air ................................................................. 93°C/W
500lfpm ............................................................... 87°C/W
MLF® (ΨJB)
Junction-to-Board ................................................ 60°C/W
LVTTL DC ELECTRICAL CHARACTERISTICS
VCC = +3.3V ±10%
Symbol
Parameter
Condition
Min
Typ
Max
Units
IOS
Output Short Circuit Current
VOUT = 0V, Note 5
–80
—
–275
mA
ICC
Power Supply Current
—
14
20
mA
VOH
Output HIGH Voltage
IOH = –3.0mA
2.0
—
—
V
VOL
Output LOW Voltage
IOL = 24mA
—
—
0.5
V
LVPECL DC ELECTRICAL CHARACTERISTICS
VCC = +3.3V ±10%; TA = –40°C to +85°C unless otherwise noted.
Symbol
Parameter
VIH
Condition
Min
Typ
Max
Units
Input HIGH Voltage
VCC–1.165
—
VCC–0.880
V
VIL
Input LOW Voltage
VCC–1.810
—
VCC–1.475
V
VBB
Bias Voltage
VCC–1.38 VCC–1.32 VCC–1.26
V
IIH
Input HIGH Current
—
—
150
µA
IIL
Input LOW Current IN
0.5
—
—
µA
Input LOW Current /IN
–300
—
—
µA
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!
M9999-051006
[email protected] or (408) 955-1690
3
Precision Edge®
SY89321L
Micrel, Inc.
AC ELECTRICAL CHARACTERISTICS
VCC = +3.3V ±10%; CL = 20pF, TA = –40°C to +85°C unless otherwise noted.
Symbol
Parameter
Condition
Min
Typ
Max
Units
fMAX
Maximum Input Frequency
Note 6
275
—
—
MHz
tpd
Propagation Delay
1.5
1.9
2.5
ns
tskpp
Part-to-Part Skew
—
—
0.5
ns
VCMR
Common Mode Range
1.2
—
VCC
V
VPP
Minimum Peak-to-Peak Input
100
—
—
mV
tr
tf
Output Rise/Fall Time
(1.0V to 2.0V)
0.5
—
1.0
ns
tJITTER
Cycle-to-cycle (rms)
Note 9
2
psRMS
Total jitter (pk-pk)
Note 10
15
psPP
Note 6.
VIN ≥ 100mV, Note 7
Note 8
The fMAX value is specified as the minimum guaranteed maximum frequency (While maintaining TTL swing of 0.8V to 2.0V). Actual operational maximum frequency may be greater.
Note 7.
Part-to-Part Skew considering HIGH-to-HIGH transitions at common VCC level.
Note 8.
VPP(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, Tn – Tn–1,where T is the time between rising edges of the
output signal.
Note 10. Total jitter definition: with an ideal clock input of frequency ≤ fMAX, no more than one output edge in 1012 output edge will deviate by more than
the specified peak-to-peak jitter value.
INPUT INTERFACE APPLICATIONS
SY89321L
IN
VCC
/IN
0.01µF
VBB
Single-Ended Input
(Terminating unused input)
M9999-051006
[email protected] or (408) 955-1690
4
Precision Edge®
SY89321L
Micrel, Inc.
8 LEAD ULTRA-SMALL EPAD-MicroLeadFrame® (MLF-8)
Package
EP- Exposed Pad
Die
CompSide Island
Heat Dissipation
Heat Dissipation
VEE
Heavy Copper Plane
VEE
Heavy Copper Plane
PCB Thermal Consideration for 8-Pin MLF® 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.
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131
TEL
+ 1 (408) 944-0800
FAX
+ 1 (408) 474-1000
WEB
USA
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.
© 2006 Micrel, Incorporated.
M9999-051006
[email protected] or (408) 955-1690
5