1
Precision Edge®
SY89312V
Micrel, Inc.
M9999-051006
hbwhelp@micrel.com or (408) 955-1690
DESCRIPTION
■Guaranteed AC performance over temperature and
voltage:
• > 4GHz fMAX input
• < 160ps tr/tf
• < 440ps tpd
■3.3V and 5V power supply operation
■100k ECL/PECL compatible I/O
■Internal 75KΩ input pull-down resistors
■Wide operating temperature range: –40°C to +85°C
■Available in ultra-small 8-pin MLF® (2mm x 2mm)
package
FEATURES
Precision Edge®
SY89312V
Rev.: C Amendment: /0
Issue Date: May 2006
The SY89312V is an integrated ÷2 divider with differential
clock inputs. It is functionally equivalent to the SY100EP32V
but in an ultra-small 8-lead MLF® package that features a
70% smaller footprint.
The VBB pin, an internally generated voltage supply, is
available for this device only. For single-ended input
conditions, the unused differential input is connected to VBB
as a switching reference voltage. VBB may also bias
AC-coupled inputs. When used, decouple VBB and VCC via
a 0.01µF capacitor and limit current sourcing or sinking to
0.5mA. When not used, VBB should be left open.
The reset pin is asynchronous and is asserted when it is
high. Upon power-up, the internal flip-flops will be in a
random state; the reset allows for the synchronous use of
multiple SY89312Vs in a system.
Precision Edge®
Precision Edge is a registered trademark of Micrel, Inc.
Micro
LeadFrame and MLF are registered trademarks of Amkor Technology, Inc.
3.3V/5V, 4GHz PECL/ECL
÷ 2 CLOCK GENERATOR
CLK /CLK RESET Q /Q
XXHLH
LFF
TRUTH TABLE(1)
Note:
1. F = Divide by 2 function
2
Precision Edge®
SY89312V
Micrel, Inc.
M9999-051006
hbwhelp@micrel.com or (408) 955-1690
PACKAGE/ORDERING INFORMATION
PIN DESCRIPTION
Pin Number Pin Name Type Pin Function
2, 3 CLK, /CLK 100K ECL/PECL Differential PECL/ECL Input: Internal 75kΩ pull-down resistor. If left open,
Input pin defaults LOW. See “Input Interface Applications” section for single-
ended inputs.
7, 6 Q, /Q 100K ECL/PECL Differential PECL/ECL Output: Output CLK input divided by 2. See “Output
Output Interface Applications” section for recommendations on terminations.
8 VCC Positive Positive Power Supply: Bypass with 0.1µF//0.01µF low ESR capacitors.
Power Supply
5 VEE, Negative Negative Power Supply: VEE and Exposed pad must be tied to most
Exposed Pad Power Supply negative supply. For PECL/LVPECL connect to ground.
4 VBB Reference Bias Reference Voltage: VCC–1.4V. Used as reference voltage for single-
Voltage Output ended inputs or AC-coupling to the CLK, /CLK inputs. Max sink/source is
±0.5mA. See “Input Interface Applications” section.
1 Reset 100k ECL/PECL Single-ended Input: PECL/ECL Asynchronous reset.
Input
RESET
CLK ÷ 2
R
/CLK
VBB
VCC
Q
/Q
VEE
1
2
3
4
8
7
6
5
TOP VIEW
8-Pin MLF®
Ultra-Small Outline (2mm x 2mm)
Ordering Information
Package Operating Package Lead
Part Number Type Range Marking Finish
SY89312VMITR MLF-8 Industrial 312 Sn-Pb
SY89312VMGTR(1) MLF-8 Industrial 312 with Pb-Free
Pb-Free bar-line indicator NiPdAu
Note:
1. Pb-Free package is recommended for new designs.
3
Precision Edge®
SY89312V
Micrel, Inc.
M9999-051006
hbwhelp@micrel.com or (408) 955-1690
Absolute Maximum Ratings(1)
Supply Voltage (|VCC–VEE|).........................................6.0V
Input Voltage (VIN) ......................................... –0.5V to VCC
LVPECL Output Current (IOUT)
Continuous .............................................................50mA
Surge....................................................................100mA
Current (VBB)
Source or sink current on VBB,(3) .............................. ±1.5mA
Lead Temperature (soldering, 20 sec.) ................... +260°C
Storage Temperature (TS) .......................–65°C to +150°C
Operating Ratings(2)
Supply Voltage (|VCC–VEE|)............................ 3.0V to 3.6V
................................................................ 4.5V to 5.5V
Ambient Temperature (TA).........................–40°C to +85°C
Package Thermal Resistance(4)
MLF® (θJA)
Still-Air.................................................................93°C/W
500lfpm ...............................................................87°C/W
MLF® (ΨJB)
Junction-to-Board................................................56°C/W
VCC = +3.3V ±10% or +5V ±10% and VEE = 0V; VCC = 0V and VEE = –3.3V ±10% or –5V ±10%; RL = 50Ω to VCC–2V; T A = –40°C to +85°C
unless otherwise stated.
Symbol Parameter Condition Min Typ Max Units
IEE Power Supply Current Max VCC, no load —30 42 mA
VOH Output HIGH Voltage VCC–1.145 —VCC–0.895 V
VOL Output LOW Voltage VCC–1.945 —VCC–1.695 V
VIH Input HIGH Voltage VCC–1.225 —VCC–0.88 V
VIL Input LOW Voltage VCC–1.945 —VCC–1.625 V
VIHCMR Input HIGH Voltage Note 5 VEE+2.0 —VCC V
Common Mode Range
VBB Bias Voltage VCC–1.525 VCC–1.425 VCC–1.325 V
IIH Input HIGH Current ——150 µA
IIL Input LOW Current CLK 0.5 ——µA
Input LOW Current /CLK –150 ——µA
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. Due to the limited drive capability use for input of the same package only.
4. Package thermal resistance assumes exposed pad is soldered (or equivalent) to the devices most negative potential on the PCB.
5. VIHCMR(min) varies 1:1 with VEE, (max) varies 1:1 with VCC.
PECL/ECL (100K) DC ELECTRICAL CHARACTERISTICS
4
Precision Edge®
SY89312V
Micrel, Inc.
M9999-051006
hbwhelp@micrel.com or (408) 955-1690
TIMING DIAGRAM
Q
CLK t
RR
RESET
PECL: VCC = +3.3V ±10% or +5V ±10% and V EE = GND; ECL: VEE = –3.3V ±10% or –5V ±10% and VCC = GND; RL = 50Ω to VCC–2V;
TA = –40°C to +85°C unless otherwise stated.
Symbol Parameter Condition Min Typ Max Units
fMAX Maximum Input Frequency 4 ——GHz
tpd Propagation Delay to Output ps
Differential RESET, CLK ➝ Q, /Q 250 275 440
tRR Set/Reset Recovery 200 100 —ps
tPW Minimum Pulse Width RESET 550 200 —ps
tJITTER Cycle-to-Cycle RMS Jitter —— 1ps
RMS
VPP Input Voltage Swing 150 800 1200 mV
(Differential)
trOutput Rise/Fall Times Q, /Q 50 100 160 ps
tf(20% to 80%)
Note:
6. Measured using a 750mV source, 50% duty cycle clock source.
AC ELECTRICAL CHARACTERISTICS(6)
5
Precision Edge®
SY89312V
Micrel, Inc.
M9999-051006
hbwhelp@micrel.com or (408) 955-1690
INPUT INTERFACE APPLICATIONS
Single-Ended
CLK
/CLK SY89312V
0.01µFV
BB
V
CC
Figure 1. Single-Ended LVPECL Input
(Terminating Unused Input)
LVPECL OUTPUT INTERFACE APPLICATIONS
Z
O
= 50Ω
R2
R1 R1
R2
R3
R4
V
CC
—2V
V
CC
—1.3V
V
CC
V
CC
V
CC
V
CC
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 2c. Terminating Unused I/O
R2R2
ZO = 50Ω
ZO = 50Ω
R1 R1
VCC —2V
VCC VCC
VCC
VCC = 3.3V; R1 = 130Ω, R2 = 82Ω
VCC = 5V; R1 = 83Ω, R2 = 125Ω
Figure 2a. Parallel Thevenin-Equivalent
Termination
Z
O
= 50Ω
Z
O
= 50Ω
R
pd
50Ω50Ω
C (Optional)
0.01µF
V
CC
V
CC
V
CC
= 3.3V; Rpd = 50Ω
V
CC
= 5V; Rpd = 100Ω
Figure 2b. Three Resistor
“Y Termination”
6
Precision Edge®
SY89312V
Micrel, Inc.
M9999-051006
hbwhelp@micrel.com or (408) 955-1690
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL + 1 (408) 944-0800 FAX + 1 (408) 474-100 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.
© 2006 Micrel, Incorporated.
8 LEAD ULTRA-SMALL EPAD-
Micro
LeadFrame® (MLF-8)
Package
EP- Exposed Pad
Die
CompSide Island
Heat Dissipation
Heavy Copper Plane
Heavy Copper Plane
VEE
VEE
Heat Dissipation
PCB Thermal Consideration for 8-Pin MLF® Package
Package Notes:
1. Package meets Level 2 qualification.
2. All parts are dry-packaged before shipment.
3. Exposed pads must be soldered to the most negative plane, equivalent to device VEE, for proper
thermal management.
