MICREL SY89830UK4G

Micrel, Inc.
2.5V/3.3/5V 2.5GHz 1:4 PECL/ECL
CLOCK DRIVER WITH 2:1
DIFFERENTIAL INPUT MUX
Precision Edge®
SY89830U
®
Precision Edge
SY89830U
FEATURES
■ Guaranteed AC parameters over temp/voltage:
• > 2.5GHz fMAX
• < 25ps within-device skew
• < 225ps tr/tf time
• < 450ps prop delay
■ Low jitter design:
• < 1psRMS cycle-to-cycle jitter
• < 15psPP total jitter
■ 2:1 Differential MUX input
■ Flexible supply voltage: 2.5V/3.3V/5V
■ Wide operating temperature range: –40°C to +85°C
■ 100K ECL compatible outputs
■ Inputs accept PECL/LVPECL/ECL/HSTL logic levels
■ Available in a 16-pin TSSOP package
Precision Edge®
DESCRIPTION
The SY89830U is a high-speed, 2.5GHz differential PECL
1:4 fanout buffer optimized for ultra-low skew applications.
Within device skew is guaranteed to be less than 25ps over
temperature and supply voltage. The wide supply voltage
operation allows this fanout buffer to operate in 2.5V, 3.3V,
and 5V systems.
The SY89830U features a 2:1 input MUX, making it an
ideal solution for redundant clock switchover applications.
If only one input pair is used, the other pair may be left
floating. In addition, this device includes a synchronous
enable pin that forces the outputs into a fixed logic state.
Enable or disable state is initiated only after the outputs are
in a LOW state, thus eliminating the possibility of a “runt”
clock pulse.
The SY89830U I/O are fully differential and 100K ECL
compatible. Differential 10K ECL logic can interface directly
into the SY89830U inputs.
The SY89830U is part of Micrel’s high-speed precision
edge timing and distribution family. For applications that
require a different I/O combination, consult the Micrel website
at www.micrel.com, and choose from a comprehensive
product line of high-speed, low-skew fanout buffers,
translators, and clock generators.
Precision Edge is a registered trademark of Micrel, Inc.
M9999-110705
[email protected] or (408) 955-1690
Rev.: E
1
Amendment: /0
Issue Date: November 2005
Precision Edge®
SY89830U
Micrel, Inc.
PACKAGE/ORDERING INFORMATION
Ordering Information(1)
Q0 1
16 VCC
/Q0 2
15 /EN
Q D
Q1 3
/Q1 4
1
Q2 5
Part Number
Package Operating
Type
Range
Package
Marking
Lead
Finish
SY89830UK4I
K4-16-1
Industrial
89830U
Sn-Pb
14 /IN1
SY89830UK4ITR(2)
K4-16-1
Industrial
89830U
Sn-Pb
13 IN1
SY89830UK4G(3)
K4-16-1
Industrial
89830U with
NiPdAu
Pb-Free bar line indicator Pb-Free
12 /IN0
SY89830UK4GTR(2, 3) K4-16-1
Industrial
89830U with
NiPdAu
Pb-Free bar line indicator Pb-Free
0
/Q2 6
11 IN0
Q3 7
10 IN_SEL
/Q3 8
9 VEE
Notes:
1. Contact factory for die availability. Dice are guaranteed at TA = 25°C, DC Electricals only.
2. Tape and Reel.
3. Pb-Free package is recommended for new designs.
16-Pin TSSOP (T32-1)
PIN DESCRIPTION
Pin Number
Pin Name
Pin Function
1, 2, 3, 4,
5, 6, 7, 8
Q0 to Q3
/Q0 to /Q3
(LV)PECL, (LV)ECL differential outputs: Terminate with 50Ω to VCC–2V. For
single-ended applications, terminate the unused output with 50Ω to VCC–2V.
9
VEE
Negative Power Supply: For LVPECL, PECL applications, connect to GND.
10
IN_SEL
(LV)PECL, (LV)ECL compatible 2:1 mux input signal select: When IN_SEL is LOW, the
IN0 input pair is selected. When IN_SEL is HIGH, the IN1 input pair is selected. Includes a
75kΩ pull-down. Default state is LOW and IN0 is selected.
11, 12, 13, 14
IN0, /IN0
IN1, /IN1
(LV)PECL, (LV)ECL, HSTL clock or data inputs.
Internal 75kΩ pull-down resistors on IN0, IN1. Internal 75kΩ pull-up and 75kΩ pull-down
resistors on /IN0, /IN1.
/IN0, /IN1 default condition is VCC/2 when left floating. IN0, IN1 default condition is LOW
when left floating.
15
/EN
(LV)PECL, (LV)ECL compatible synchronous enable: When /EN goes HIGH, QOUT will
go LOW and /QOUT will go HIGH on the next LOW input clock transition. Includes a 75kΩ
pull-down. Default state is LOW when left floating. The internal latch is clocked on the
falling edge of the input (IN0, IN1)
16
VCC
Positive Power Supply: Bypass with 0.1µF//0.01µF low ESR capacitors.
TRUTH TABLE(1)
IN0
IN1
IN_SEL
/EN
Q
L
X
L
L
L
H
X
L
L
H
X
L
H
L
L
X
H
H
L
H
X
L
H
L
H
H
L
X
Note:
1.
= negative edge
M9999-110705
[email protected] or (408) 955-1690
2
Precision Edge®
SY89830U
Micrel, Inc.
ABSOLUTE MAXIMUM RATINGS(1)
Symbol
Rating
VCC – VEE
Power Supply Voltage
VIN
Input Voltage (VCC = 0V, VIN not more negative than VEE)
Input Voltage (VEE = 0V, VIN not more positive than VCC)
IOUT
Output Current
TA
Operating Temperature Range
TLEAD
Lead Temperature (soldering, 20sec.)
Tstore
Storage Temperature Range
θJA
Package Thermal Resistance
(Junction-to-Ambient)
θJC
Package Thermal Resistance
(Junction-to-Case)
–Continuous
–Surge
–Still-Air (single-layer PCB)
–Still-Air (multi-layer PCB)
–500lfpm (multi-layer PCB)
Value
Unit
6.0
V
–6.0 to 0
+6.0 to 0
V
50
100
mA
–40 to +85
°C
260
°C
–65 to +150
°C
115
75
65
°C/W
21
°C/W
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.
DC ELECTRICAL CHARACTERISTICS(1)
TA = –40°C
Symbol
VCC
Parameter
Min.
Typ.
Power Supply Voltage
(PECL)
(LVPECL)
(ECL)
(LVECL)
4.5
2.375
–5.5
–3.63
5.0
3.3
–5.0
–3.3
TA = +25°C
Max.
Min.
Typ.
5.5
4.5
3.63 2.375
–4.5
–5.5
–2.375 –3.63
5.0
3.3
–5.0
–3.3
TA = +85°C
Max.
Min.
Typ.
Max.
5.5
4.5
3.63 2.375
–4.5
–5.5
–2.375 –3.63
5.0
3.3
–5.0
–3.3
5.5
3.63
–4.5
–2.375
Unit
Condition
V
ICC
Power Supply Current
—
—
70
—
50
72
—
—
75
mA
IIH
Input HIGH Current
—
—
150
—
—
150
—
—
150
µA
VIN = VIH
IIL
Input LOW Current
0.5
–150
—
—
—
—
0.5
–150
—
—
—
—
0.5
–150
—
—
—
—
µA
µA
VIN = VIL
VIN = VIL
CIN
Input Capacitance (TSSOP)
—
—
—
—
1.0
—
—
—
—
pF
IN
/IN
Note:
1. 100KEP circuits are designed to meet the DC specifications shown in the above table after thermal equilibrium has been established. The circuit is in a
test socket or mounted on a printed circuit board and traverse airflow greater than 500lfpm is maintained.
M9999-110705
[email protected] or (408) 955-1690
3
Precision Edge®
SY89830U
Micrel, Inc.
(100KEP) LVPECL DC ELECTRICAL CHARACTERISTICS(1)
VCC = 2.5V ±5%, VEE = 0V
TA = –40°C
Symbol
TA = +25°C
TA = +85°C
Parameter
Min.
Typ.
Max.
Min.
Typ.
Max.
Min.
Typ.
Max.
Unit
Condition
VIL
Input LOW Voltage
(Single-ended)
555
—
875
555
—
875
555
—
875
mV
VCC = 2.5V
VIH
Input HIGH Voltage
(Single-ended)
1275
—
1620
1275
—
1620
1275
—
1620
mV
VCC = 2.5V
VOL
Output LOW Voltage
555
680
805
555
680
805
555
680
805
mV
VCC = 2.5V
VOH
Output HIGH Voltage
1355
1480
1605
1355
1480
1605
1355
1480
1605
mV
VCC = 2.5V
VIHCMR
Input HIGH Voltage
Common Mode Range(2)
1.2
—
VCC
1.2
—
VCC
1.2
—
VCC
V
Notes:
1. 100KEP circuits are designed to meet the DC specifications shown in the above table after thermal equilibrium has been established. The circuit is in a
test socket or mounted on a printed circuit board and traverse airflow greater than 500lfpm is maintained. Input and output parameters vary 1:1 with VCC.
Output load is 50Ω to VCC –2V.
2. The VIHCMR range is referenced to the most positive side of the differential input signal.
(100KEP) LVPECL DC ELECTRICAL CHARACTERISTICS(1)
VCC = 3.3V ±10%, VEE = 0V
TA = –40°C
Symbol
Parameter
TA = +25°C
TA = +85°C
Min.
Typ.
Max.
Min.
Typ.
Max.
Min.
Typ.
Max.
Unit
Condition
VIL
Input LOW Voltage
(Single-Ended)
1355
—
1675
1355
—
1675
1355
—
1675
mV
VCC = 3.3V
VIH
Input HIGH Voltage
(Single-Ended)
2075
—
2420
2075
—
2420
2075
—
2420
mV
VCC = 3.3V
VOL
Output LOW Voltage
1355
1480
1605
1355
1480
1605
1355
1480
1605
mV
VCC = 3.3V
VOH
Output HIGH Voltage
2155
2280
2405
2155
2280
2405
2155
2280
2405
mV
VCC = 3.3V
VIHCMR
Input HIGH Voltage
Common Mode Range(2)
1.2
—
VCC
1.2
—
VCC
1.2
—
VCC
V
Notes:
1. 100KEP circuits are designed to meet the DC specifications shown in the above table after thermal equilibrium has been established. The circuit is in a
test socket or mounted on a printed circuit board and traverse airflow greater than 500lfpm is maintained. Input and output parameters vary 1:1 with VCC.
Output load is 50Ω to VCC –2V.
2. The VIHCMR range is referenced to the most positive side of the differential input signal.
(100KEP) PECL DC ELECTRICAL CHARACTERISTICS(1)
VCC = 5.0V ±10%, VEE = 0V
TA = –40°C
Symbol
TA = +25°C
TA = +85°C
Parameter
Min.
Typ.
Max.
Min.
Typ.
Max.
Min.
Typ.
Max.
Unit
Condition
VIL
Input LOW Voltage
(Single-Ended)
3055
—
3375
3055
—
3375
3055
—
3375
mV
VCC = 5.0V
VIH
Input HIGH Voltage
(Single-Ended)
3775
—
4120
3775
—
4120
3775
—
4120
mV
VCC = 5.0V
VOL
Output LOW Voltage
3055
3180
3305
3055
3180
3305
3055
3180
3305
mV
VCC = 5.0V
VOH
Output HIGH Voltage
3855
3980
4105
3855
3980
4105
3855
3980
4105
mV
VCC = 5.0V
VIHCMR
Input HIGH Voltage(2)
Common Mode Range
1.2
—
VCC
1.2
—
VCC
1.2
—
VCC
V
Notes:
1. 100KEP circuits are designed to meet the DC specifications shown in the above table after thermal equilibrium has been established. The circuit is in a
test socket or mounted on a printed circuit board and traverse airflow greater than 500lfpm is maintained. Input and output parameters vary 1:1 with VCC.
Output load is 50Ω to VCC –2V.
2. The VIHCMR range is referenced to the most positive side of the differential input signal.
M9999-110705
[email protected] or (408) 955-1690
4
Precision Edge®
SY89830U
Micrel, Inc.
(100KEP) LVECL DC ELECTRICAL CHARACTERISTICS(1)
VCC = 0V, VEE = –2.375V to –3.63V
TA = –40°C
Symbol
Parameter
Min.
Typ.
TA = +25°C
Max.
Min.
Typ.
TA = +85°C
Max.
Min.
Typ.
Max.
Unit
Condition
VIL
Input LOW Voltage
(Single-ended)
–1945
—
–1625 –1945
—
–1625 –1945
—
–1625
mV
VIH
Input HIGH Voltage
(Single-ended)
–1225
—
–880
—
–880
—
–880
mV
VOL
Output LOW Voltage
–1945 –1820 –1695 –1945 –1820 –1695 –1945 –1820 –1695
mV 50Ω to VCC–2V
VOH
Output HIGH Voltage
–1145 –1020
mV 50Ω to VCC–2V
VIHCMR
Input HIGH Voltage
Common Mode Range(2)
VEE +1.2
–895
—
0.0
–1225
–1145 –1020
VEE +1.2
–895
—
0.0
–1225
–1145 –1020
VEE +1.2
–895
—
0.0
V
Notes:
1. 100KEP circuits are designed to meet the DC specifications shown in the above table after thermal equilibrium has been established. The circuit is in a
test socket or mounted on a printed circuit board and traverse airflow greater than 500lfpm is maintained.
2. The VIHCMR range is referenced to the most positive side of the differential input signal.
(100KEP) ECL DC ELECTRICAL CHARACTERISTICS(1)
VCC = 0V, VEE = –4.5V to –5.5V
TA = –40°C
Symbol
Parameter
Min.
Typ.
TA = +25°C
Max.
Min.
Typ.
TA = +85°C
Max.
Min.
Typ.
Max.
Unit
Condition
VIL
Input LOW Voltage
(Single-ended)
–1945
—
–1625 –1945
—
–1625 –1945
—
–1625
mV
VIH
Input HIGH Voltage
(Single-ended)
–1225
—
–880
—
–880
—
–880
mV
VOL
Output LOW Voltage
–1945 –1820 –1695 –1945 –1820 –1695 –1945 –1820 –1695
mV 50Ω to VCC–2V
VOH
Output HIGH Voltage
–1145 –1020
mV 50Ω to VCC–2V
VIHCMR
Input HIGH Voltage
Common Mode Range(2)
VEE +1.2
–895
—
0.0
–1225
–1145 –1020
VEE +1.2
—
–895
0.0
–1225
–1145 –1020
VEE +1.2
—
–895
0.0
V
Notes:
1. 100KEP circuits are designed to meet the DC specifications shown in the above table after thermal equilibrium has been established. The circuit is in a
test socket or mounted on a printed circuit board and traverse airflow greater than 500lfpm is maintained.
2. The VIHCMR range is referenced to the most positive side of the differential input signal.
HSTL INPUT DC ELECTRICAL CHARACTERISTICS
VCC = 2.375V to 3.63V, VEE = 0V
TA = –40°C
Symbol
Parameter
TA = +25°C
TA = +85°C
Min.
Typ.
Max.
Min.
Typ.
Max.
Min.
Typ.
Max.
Unit
VIH
Input HIGH Voltage
1200
—
—
1200
—
—
1200
—
—
mV
VIL
Input LOW Voltage
—
—
400
—
—
400
—
—
400
mV
M9999-110705
[email protected] or (408) 955-1690
5
Precision Edge®
SY89830U
Micrel, Inc.
AC ELECTRICAL CHARACTERISTICS
LVPECL: VCC = 2.375V to 3.63V, VEE = 0V; PECL: VCC = 4.50V to 5.50V, VEE = 0V
LVECL: VCC = 0V, VEE = –2.375V to –3.63V; ECL: VCC = 0V, VEE = –4.50V to –5.5V
TA = –40°C
Symbol
fMAX(1)
tPD
Parameter
TA = +25°C
TA = +85°C
Min.
Typ.
Max.
Min.
Typ.
Max.
Min.
Typ.
Max.
Unit
Maximum Frequency
2.5
—
—
2.5
—
—
2.5
—
—
GHz
Propagation Delay to Output
LVPECL/LVECL
Diff. IN (150mV)
—
—
—
—
375
—
—
—
—
ps
Diff. IN (800mV)
300
350
450
300
350
450
300
350
450
ps
Single-Ended IN
—
—
—
—
375
—
—
—
—
ps
Diff. IN (150mV)
—
—
—
—
375
—
—
—
—
ps
Diff. IN (800mV)
275
350
425
275
350
425
275
350
425
ps
Single-Ended IN
—
—
—
—
355
—
—
—
—
ps
325
—
500
300
—
450
300
—
450
ps
PECL/ECL
HSTL
tSKEW(2)
Within-Device Skew (Diff.)
Part-to-Part Skew (Diff.)
—
—
15
100
25
150
—
—
15
100
25
150
—
—
15
100
25
150
ps
ps
tSW
Select to Valid Output
Switchover Time
—
—
450
—
400
450
—
—
450
ps
tS(3)
Set-Up Time
/EN to CLK
100
0
—
100
0
—
100
0
—
ps
Hold Time
/EN to CLK
200
50
—
200
50
—
200
50
—
ps
—
—
0.2
<15
1
—
—
—
0.2
<15
1
—
—
—
0.2
<15
1
—
psRMS
psPP
tH
(3)
tJITTER
Cycle-to-Cycle(4)
VID
Input Voltage Swing
150
800
1200
150
800
1200
150
800
1200
mV
t r, t f
Output Rise/Fall Times
(20% to 80%)
75
—
225
75
130
225
85
—
225
ps
Total Jitter (622MHz clock)(5)
Notes:
1. fMAX is defined as the maximum toggle frequency. Measured with 750mV input signal, 50% duty cycle, output swing ≥ 400mV (diff), all loading with 50Ω
to VCC–2V.
2. Skew is measured between outputs under identical transitions.
3. Set-up and hold times apply to synchronous applications that intend to enable/disable before the next cycle. For asynchronous applications, set-up and
hold time does not apply.
4. Cycle-to-cycle jitter definition: The variation in period between adjacent cycles over a random sample of adjacent cycle pairs. TJITTER_CC = Tn–Tn+1 where
T is the time between rising edges of the output signal.
5. Total jitter definition: with an ideal clock input applied to one channel of the MUX, no more than one output edge in 1012 output edges will deviate by more
than the specified peak-to-peak jitter value.
M9999-110705
[email protected] or (408) 955-1690
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Precision Edge®
SY89830U
Micrel, Inc.
TYPICAL OPERATING CHARACTERISTICS
VCC = 3.3V, VEE = GND, TA = 25°C, unless otherwise stated.
Propagation Delay
vs. Temperature
Output Swing
vs. Frequency
500
PROPAGATION DELAY (ps)
OUTPUT SWING (mV Diff.)
900
800
700
600
500
400
300
TA = 25°C
VCC = 3.3V
VIN = 800mV
200
100
0
0
475
450
425
400
375
350
325
300
-40 -20 0 20 40 60 80 100
TEMPERATURE (°C)
500 1000 1500 2000 2500
FREQUENCY (MHz)
Propagation Delay
vs. Differential Input Voltage
(Vdiff)
30
450
TA = 25°C
VCC = 3.3V
25
tSKEW (ps)
PROPAGATION DELAY (ps)
500
475
TA = 25°C
VCC = 3.3V
VIN = 800mV
425
400
375
20
t
SKEW
vs. Temperature
TA = 25°C
VCC = 3.3V
VIN = 800mV
15
10
350
5
325
0
-40 -20 0 20 40 60 80 100
TEMPERATURE (°C)
300
100 200 300 400 500 600 700 800
DIFFERENTIAL INPUT VOLTAGE (Vdiff, mV)
M9999-110705
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Precision Edge®
SY89830U
Micrel, Inc.
FUNCTIONAL CHARACTERISTICS
125MHz Output
1.5GHz Output
TA = 25°C
VCC = 3.3V
VEE GND
VIN = 800mV
/Q
Output Swing
(200mV/div.)
Output Swing
(200mV/div.)
TA = 25°C
VCC = 3.3V
VEE GND
VIN = 800mV
/Q
Q
Q
TIME (178ps/div.)
TIME (96ps/div.)
2.5GHz Output
Output Swing
(200mV/div.)
TA = 25°C
VCC = 3.3V
VEE GND
VIN = 800mV
/Q
Q
TIME (72ps/div.)
M9999-110705
[email protected] or (408) 955-1690
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Precision Edge®
SY89830U
Micrel, Inc.
TERMINATION RECOMMENDATIONS
+3.3V
+3.3V
ZO = 50Ω
R1
130Ω
R1
130Ω
R2
82Ω
R2
82Ω
+3.3V
ZO = 50Ω
Vt = VCC —2V
Figure 1. Parallel Termination–Thevenin Equivalent
Notes:
1. For +2.5V systems:
R1 = 250Ω
R2 = 62.5Ω
2. For +5.0V systems:
R1 = 82Ω
R2 = 130Ω
+3.3V
+3.3V
Z = 50Ω
Z = 50Ω
50Ω
50Ω
“source”
“destination”
50Ω
Rb
(Optional)
C1
0.01µF
Figure 2. Three-Resistor “Y–Termination”
Notes:
1. Power-saving alternative to Thevenin termination.
2. Place termination resistors as close to destination inputs as possible.
3. Rb resistor sets the DC bias voltage, equal to Vt. For +3.3V systems Rb = 46Ω to 50Ω. For +5V systems, Rb = 110Ω.
4. C1 is an optional bypass capacitor intended to compensate for any tr/tf mismatches.
+3.3V
+3.3V
Q
+3.3V
R1
130Ω
R1
130Ω
Vt = VCC —1.3V
R3
+3.3V
1kΩ
ZO = 50Ω
/Q
R4
1.6kΩ
Vt = VCC —2V
R2
82Ω
R2
82Ω
Figure 3. Terminating Unused I/O
Notes:
1. Unused output (/Q) must be terminated to balance the output.
2. For +2.5V systems: R1 = 250Ω, R2 = 62.5Ω, R3 = 1.25kΩ, R4 = 1.2kΩ.
M9999-110705
[email protected] or (408) 955-1690
9
Precision Edge®
SY89830U
Micrel, Inc.
16 LEAD TSSOP (K4-16-1)
Rev. 01
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131
TEL
+ 1 (408) 944-0800
FAX
+ 1 (408) 474-1000
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The information furnished by Micrel in this data sheet 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.
© 2005 Micrel, Incorporated.
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[email protected] or (408) 955-1690
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