Micrel, Inc.
ENHANCED DIFFERENTIAL
RECEIVER
Precision Edge
®
SY89250V
Precision Edge
®
SY89250V
FEATURES
s
3.3V and 5V power supply options
s
250ps propagation delay
s
Very high voltage gain
s
Ideal for Pulse Amplifier and Limiting Amplifier
applications
s
Data synchronous Enable/Disable (/EN) on Q
HG
and
/Q
HG
provides for complete glitchless gating of the
outputs
s
Ideal for gating timing signals
s
Complete solution for high quality, high frequency
crystal oscillator applications
s
Available in an ultra-small 8-pin (2mm
×
2mm)
MLF™ package
Precision Edge
®
DESCRIPTION
The SY89250V is a differential PECL/ECL receiver/buffer
in a space saving (2mm
×
2mm) MLF™ package. The device
is functionally equivalent to the SY100EL16VC, but features
a 70% smaller footprint. It provides a V
BB
output for either
single-ended application or as a DC bias for AC-coupling to
the device.
The SY89250V provides an /EN input which is synchro-
nized with the data input (D) signal in a way that provides
glitchless gating of the Q
HG
and /Q
HG
outputs. When the /EN
signal is LOW, the input is passed to the outputs and the data
output equals the data input. When the data input is HIGH and
the /EN goes HIGH, it will force the Q
HG
LOW and the /Q
HG
HIGH on the next negative transition of the data input. If the
data input is LOW when the /EN goes HIGH, the next data
transition to a HIGH is ignored and Q
HG
remains LOW and
/Q
HG
remains HIGH. The next positive transition of the data
input is not passed on to the data outputs under these
conditions. The Q
HG
and /Q
HG
outputs remain in their dis-
abled state as long as the /EN input is held HIGH. The /EN
input has no influence on the /Q output and the data input is
passed on (inverted) to this output whether /EN is HIGH or
LOW. This configuration is ideal for crystal oscillator applica-
tions, where the oscillator can be free running and gated on
and off synchronously without adding extra counts to the
output.
All support documentation can be found on Micrel’s web
site at www.micrel.com.
APPLICATIONS
s
Oscillator modules
BLOCK DIAGRAM
FUNCTIONAL CROSS REFERENCE
Micrel Part Number
SY89250V
PECL/ECL
100k
Functional Cross
SY100EL16VC
/Q
1
D
2
V
BB
3
V
BB
LEN Q
LATCH
OE
8
7
6
5
V
CC
Q
HG
/Q
HG
V
EE
/EN
4
D
Precision Edge is a registered trademark of Micrel, Inc.
MicroLeadFrame
and MLF are trademarks of Amkor Technology, Inc.
M9999-052505
hbwhelp@micrel.com or (408) 955-1690
Rev.: B
Amendment: /0
1
Issue Date: May 2005
Micrel, Inc.
Precision Edge
®
SY89250V
PACKAGE/ORDERING INFORMATION
/Q
D
VBB
/EN
1
2
3
4
8
7
6
5
VCC
QHG
/QHG
VEE
Ordering Information
(1)
Part Number
SY89250VMI
SY89250VMITR
(2)
SY89250VMG
SY89250VMGTR
(2)
Package
Type
MLF-8
MLF-8
MLF-8
MLF-8
Operating
Range
Industrial
Industrial
Industrial
Industrial
Package
Marking
250
250
250 with
Pb-Free bar-line indicator
250 with
Pb-Free bar-line indicator
Lead
Finish
Sn-Pb
Sn-Pb
Pb-Free
NiPdAu
Pb-Free
NiPdAu
8-Pin MLF™
(Ultra-Small Outline)
Notes:
1. Contact factory for die availability. Dice are guaranteed at T
A
= 25°C, DC electricals only.
2. Tape and Reel.
PIN DESCRIPTION
Pin Number
1
2
Pin Name
/Q
D
Type
100k
100k
Pin Function
Single-Ended PECL/ECL Feedback Output.
Single-Ended PECL/ECL Input: The signal input includes an internal 75kΩ
pull-down ECL Input resistor. If input is left open, Q output will default to
LOW. See “Input Interface Applications” section for single-ended inputs.
Bias Voltage: V
CC
–1.3V. Used as reference voltage when AC-coupling to
the D input. Max sink/source is
±0.5mA.
/EN Input which is synchronized with data input (D) signal in a way that
provides glitchless gating of Q
HG
and /Q
HG
outputs. Includes internal 75kΩ
pull-down resistor. Default is LOW
Negative Power Supply: V
EE
and exposed pad must be tied to most
negative supply. For PECL/LVPECL connect to ground.
Differential PECL/ECL Output: Defaults to LOW if D inputs left open.
See “Output Interface Applications” section for recommendations on
terminations.
Positive Power Supply: Bypass with 0.1µF//0.01µF low ESR capacitors.
3
4
VBB
/EN
Reference
Output Voltage
Enable Input
5
6, 7
VEE,
Exposed Pad
/QHG, QHG
Negative
Power Supply
100k
ECL Output
Positive
Power Supply
8
VCC
TRUTH TABLE
/EN
0
1
Data
Logic Low
Q
HG
Output
M9999-052505
hbwhelp@micrel.com or (408) 955-1690
2
Micrel, Inc.
Precision Edge
®
SY89250V
Absolute Maximum Ratings
(1)
Power Supply Voltage (V
CC
) ....................... –0.5V to +6.0V
ECL Input Voltage (V
IN
) ............................ 0V to V
CC
+0.5V
Voltage Applied to Output at HIGH State
(V
OUT
) ........................................................ –0.5V to V
CC
Current Applied to Output at LOW State
(I
OUT
) .......................................... Twice the rated I
OL
mA
Lead Temperature (soldering, 20 sec.) ..................... 260°C
Storage Temperature (T
S
) ....................... –65°C to +150°C
Operating Ratings
(2)
Power Supply Voltage
|V
CC
–V
EE
| ....
3.3V
±10%
or 5V
±10%
Ambient Temperature (T
A
) ......................... –40°C to +85°C
Package Thermal Resistance,
(3)
MLF™
(θ
JA
)
Still-Air ............................................................. 93°C/W
MLF™
(ψ
JB
), ....................................................... 60°C/W
DC ELECTRICAL CHARACTERISTICS
T
A
= –40°C to +85°C; unless otherwise stated.
Symbol
V
EE
I
EE
I
IH
V
BB
Parameter
Power Supply
Power Supply Current
Input HIGH Current
Output Reference Voltage
Condition
|V
CC
–V
EE
|
|V
CC
–V
EE
|
Min
3.0
4.5
Typ
3.3
5.0
Max
3.6
5.5
46
150
V
CC
–1.38 V
CC
–1.32 V
CC
–1.26
Units
V
V
mA
µA
V
DC ELECTRICAL CHARACTERISTICS
V
CC
= +3.3V
±10%
or +5V
±10%
and V
EE
= 0V; V
CC
= 0V and V
EE
= –3.3V
±10%
or –5V
±10%;
T
A
= –40°C to +85°C; unless otherwise stated.
Symbol
V
OH
V
OL
V
IH
V
IL
V
BB
V
PP
I
IH
I
IL
Notes:
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.
2. The data sheet limits are not guaranteed if the device is operated beyond the operating ratings.
3. Package thermal resistance assumes exposed pad is soldered (or equivalent) to the devices most negative potential on the PCB.
4. Output loaded with 50Ω to V
CC
–2V.
Parameter
Output HIGH Voltage
Output LOW Voltage
Input HIGH Voltage
Input LOW Voltage
Output Reference Voltage
Minimum Input Swing
Input HIGH Current
Input LOW Current
Condition
Note 4
Note 4
Min
V
CC
–1.085
V
CC
–1.830
V
CC
–1.165
V
CC
–1.810
V
CC
–1.38
150
Typ
Max
V
CC
–0.880
V
CC
–1.555
V
CC
–0.880
V
CC
–1.475
V
CC
–1.26
150
Units
V
V
V
V
V
mV
µA
µA
0.5
M9999-052505
hbwhelp@micrel.com or (408) 955-1690
3
Micrel, Inc.
Precision Edge
®
SY89250V
AC ELECTRICAL CHARACTERISTICS
V
EE
= V
EE
(min) to V
EE
(max); V
CC
= GND; T
A
= –40°C to +85°C; unless otherwise stated.
Symbol
t
pd
Parameter
Propagation Delay to:
Q, /Q Output
QHG, /QHG Output
t
S
t
H
t
SKEW
V
PP
V
CMR
t
r
, t
f
Notes:
5. Duty cycle skew is the difference between a t
pd
propagation delay through a device.
6. Minimum input swing for which AC parameters are guaranteed. The device has a DC gain of
≈
40 to Q, /Q outputs and a DC gain of
≈
200 or higher
to /Q
HG
, Q
HG
outputs.
7. The CMR range is referenced to the most positive side of the differential input signal. Normal operation is obtained if the HIGH level falls within the
specified range and the peak-to-peak voltage lies between V
PP
(min) and 1V. The lower end of the CMR range varies 1:1 with V
EE
. The numbers in
the spec table assume a nominal V
EE
= –3.3V. Note for PECL operation, the V
CMR
(min) will be fixed at 3.3V – |V
CMR
(min)|.
Condition
D (Diff)
D (SE)
D (Diff)
D (SE)
/EN
/EN
(Diff)
/EN
/EN
Note 5
Note 6
Note 7
At full output swing
Min
Typ
Max
380
430
730
780
Units
ps
ps
ps
ps
ps
ps
Set-Up Time
Hold Time
Duty Cycle Skew
Minimum Input Swing
Common Mode Range
Output Q Rise/Fall Times
(20% to 80%)
150
150
5
150
–1.3
100
225
–0.4
350
20
ps
mV
V
ps
TIMING DIAGRAM
D
t
S
t
H
/EN
Q
Q
HG
M9999-052505
hbwhelp@micrel.com or (408) 955-1690
4
Micrel, Inc.
Precision Edge
®
SY89250V
OUTPUT INTERFACE APPLICATIONS
V
CC
V
CC
R1
Z
O
= 50Ω
Z
O
= 50Ω
V
CC
—2V R2
V
CC
= 3.3V; R1 = 130Ω, R2 = 82Ω
V
CC
= 5V; R1 = 83Ω, R2 = 125Ω
R1
V
CC
V
CC
Z
O
= 50Ω
Z
O
= 50Ω
50Ω
50Ω
R
pd
V
CC
R2
V
CC
= 3.3V; Rpd = 50Ω
V
CC
= 5V; Rpd = 100Ω
C (Optional)
0.01µF
Figure 1a. Parallel Thevenin-Equivalent Termination
V
CC
V
CC
V
CC
R1
R1
Z
O
= 50Ω
V
CC
—2V
Figure 1b. Three Resistor “Y Termination”
R3
V
CC
R2
R2
R4
V
CC
—1.3V
V
CC
= 3.3V; R1 = 130Ω, R2 = 82Ω, R3 = 1kΩ, R4 = 1.6kΩ,
V
CC
= 5V; R1 = 83Ω, R2 = 125Ω, R3 = 1kΩ, R4 = 2.8kΩ,
Figure 1c. Terminating Unused I/O
RELATED PRODUCT AND SUPPORT DOCUMENTATION
Part Number
SY89306/316V
SY89206/216V
HBW Solutions
Function
3.3V/5V 2.5GHz PECL/ECL
Differential Receiver/Buffer
3.3V/5V 1GHz PECL/ECL
Differential Receiver/Buffer
New Products and Applications
Data Sheet Link
www.micrel.com/product-info/products/sy89306-316v.shtml
www.micrel.com/product-info/products/sy89206-216v.shtml
www.micrel.com/product-info/products/solutions.shtml
M9999-052505
hbwhelp@micrel.com or (408) 955-1690
5
京公网安备 11010802033920号
EEWORLD
