SY89829UHGTR [MICROCHIP]
Low Skew Clock Driver, 89829 Series, 20 True Output(s), 0 Inverted Output(s), PQFP64, LEAD FREE, TQFP-64;
| 型号： | SY89829UHGTR |
| 厂家： | 
MICROCHIP |
| 描述： | Low Skew Clock Driver, 89829 Series, 20 True Output(s), 0 Inverted Output(s), PQFP64, LEAD FREE, TQFP-64 驱动 逻辑集成电路 |
| 文件： | 总10页 (文件大小：113K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
®
2.5V/3.3V HIGH-PERFORMANCE, DUAL 1:10
OR LVPECL CLOCK DRIVER w/ INTERNAL
TERMINATION AND REDUNDANT SWITCHOVER
®
Precision Edge
SY89829U
FEATURES
■ Dual 1:10 fanout buffer/translator
■ Accepts LVPECL or LVDS inputs
®
Precision Edge
■ Multiplexed inputs ideal for redundant clock
DESCRIPTION
switchover
■ Guaranteed AC parameters:
The SY89829U is a High Performance dual 1:10 or
single 1:20 LVPECL Clock Driver. The part is designed for
use in low voltage (2.5V/3.3V) applications which require a
large number of outputs to drive precisely aligned, ultra low
skew signals to their destination. The input is multiplexed
from either LVDS or LVPECL by the CLK_SEL pin. The
LVDS inputs include a 100Ω internal termination across
the input pair, thus eliminating any need for external
termination. The 2:1 input mux makes this device an ideal
choice for redundant clock applications that need to switch
between two reference clocks. The output enable (OE) is
synchronous so that the outputs will only be enabled/
disabled when they are already in the LOW state. This
eliminates any chance of generating a runt clock pulse
when the device is enabled/disabled as can happen with an
asynchronous control.
• > 1GHz fMAX (toggle)
• < 50ps ch-ch skew
■ LVDS input includes 100Ω internal termination
■ Low supply voltage: 2.5V, 3.3V
■ –40°C to +85°C temperature range
■ Output enable (OE) pin
■ Available in 64 EPAD-TQFP
APPLICATIONS
■ High-performance PCs
■ Workstations
The SY89829U features low pin-to-pin skew (50ps max.)
and low part-to-part skew (200ps max.)—performance
previously unachievable in a standard product having such
a high number of outputs. The SY89829U is available in a
single space saving package which provides a lower overall
cost solution. In addition, a single chip solution improves
timing budgets by eliminating the multiple device solution
with their corresponding large part-to-part skew.
■ Parallel processor-based systems
■ Other high-performance computing
■ Communications
■ Redundant LVPECL or LVDS bus clock switchover
Precision Edge is a registered trademark of Micrel, Inc.
Rev.: D
Amendment: /0
M9999-120205
hbwhelp@micrel.com or (408) 955-1690
1
Issue Date: November 2005
Precision Edge®
SY89829U
Micrel, Inc.
PACKAGE/ORDERING INFORMATION
Ordering Information(1)
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49
Package Operating
Package
Marking
Lead
Finish
1
2
3
4
5
6
7
8
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
VCCO
Q7
/Q7
Q8
/Q8
SEL2
LVDS_CLKB
/LVDS_CLKB
VCCI
LVDS_CLKA
/LVDS_CLKA
CLK_SEL1
LVPECL_CLKA
/LVPECL_CLKA
GND
Part Number
Type
H64-1
H64-1
H64-1
Range
SY89829UHI
Industrial
Industrial
Industrial
SY89829UHI
SY89829UHI
Sn-Pb
Sn-Pb
SY89829UHITR(2)
SY89829UHG(3)
Q9
/Q9
64-Pin
EPAD-TQFP
(Top View)
VCCO
VCCO
Q10
/Q10
Q11
/Q11
Q12
/Q12
VCCO
SY89829UHG with
Pb-Free
9
10
11
12
13
14
15
16
Pb-Free bar-line indicator NiPdAu
SY89829UHG with Pb-Free
Pb-Free bar-line indicator NiPdAu
OE1
SY89829UHGTR(2, 3)
H64-1
Industrial
LVPECL_CLKB
/LVPECL_CLKB
CLK_SEL2
OE2
SEL1
Notes:
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
1. Contact factory for die availability. Dice are guaranteed at TA = 25°C, DC electricals only.
2. Tape and Reel.
3. Pb-Free package recommended for new designs.
64-Pin TQFP (H64-1)
PIN NAMES
Pin
Function
LVDS_CLKA,
/LVDS_CLKA,
LVDS_CLKB,
/LVDS_CLKB
Differential LVDS Inputs with Internal 100Ω Termination.
LVPECL_CLKA,
/LVPECL_CLKA
LVPECL_CLKB,
/LVPECL_CLKB
Differential LVPECL Inputs. For DC-coupled input signals, terminate the input signal with 50Ω to VCC –2V.
For AC-coupled to VCC –2V. For AC-coupled terminate the input signal with 50Ω to VCC –3V.
CLK_SEL1,
CLK_SEL2
Input CLK Select (LVTTL).
SEL1, SEL2
Input Select (LVTTL).
OE1, OE2
Output Enable (LVTTL).
Q0 – Q19, /Q0 – /Q19
Differential LVPECL Outputs. Normally terminated with 50Ω to VCC –2V. Unused output pairs can be left
floating.
GND
VCCI
Ground.
Power Supply for Output Drivers.
M9999-120205
hbwhelp@micrel.com or (408) 955-1690
2
Precision Edge®
SY89829U
Micrel, Inc.
LOGIC SYMBOL
CLK_SEL1
SEL1
OE1
LVDS_CLKA
0
1
/LVDS_CLKA
10
10
0
1
Q0 – Q9
LVPECL_CLKA
/LVPECL_CLKA
/Q0 – /Q9
LEN
D
LVDS_CLKB
/LVDS_CLKB
Q
0
1
LVPECL_CLKB
/LVPECL_CLKB
0
1
10
10
Q10 – Q19
/Q10 – /Q19
CLK_SEL2
LEN
D
SEL2
Q
OE2
TRUTH TABLE
OE
CLK_SEL1
CLK_SEL2
SEL1 SEL2
Q0 – Q9
/Q0 – /Q9
Q10 – Q19
/Q10 – /Q19
1
1
1
1
0
0
0
0
0
0
0
0
0
0
1
1
0
1
0
1
LVDS_CLKA
LVDS_CLKA
LVDS_CLKB
LVDS_CLKB
/LVDS_CLKA
/LVDS_CLKA
/LVDS_CLKB
/LVDS_CLKB
LVDS_CLKA
LVDS_CLKB
LVDS_CLKA
LVDS_CLKB
/LVDS_CLKA
/LVDS_CLKB
/LVDS_CLKA
/LVDS_CLKB
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
1
0
1
LVDS_CLKA
LVDS_CLKA
/LVDS_CLKA
/LVDS_CLKA
LVDS_CLKA
LVPECL_CLKB
LVDS_CLKA
/LVDS_CLKA
/LVPECL_CLKB
/LVDS_CLKA
LVPECL_CLKB
LVPECL_CLKB
/LVPECL_CLKB
/LVPECL_CLKB
LVPECL_CLKB
/LVPECL_CLKB
1
1
1
1
1
1
1
1
0
0
0
0
0
0
1
1
0
1
0
1
LVPECL_CLKA
LVPECL_CLKA
LVDS_CLKB
/LVPECL_CLKA
/LVPECL_CLKA
/LVDS_CLKB
LVPECL_CLKA
LVDS_CLKB
/LVPECL_CLKA
/LVDS_CLKB
LVPECL_CLKA
LVDS_CLKB
/LVPECL_CLKA
/LVDS_CLKB
LVDS_CLKB
/LVDS_CLKB
1
1
1
1
1
1
1
1
1
1
1
1
0
0
1
1
0
1
0
1
LVPECL_CLKA
LVPECL_CLKA
LVPECL_CLKB
LVPECL_CLKB
/LVPECL_CLKA
/LVPECL_CLKA
/LVPECL_CLKB
/LVPECL_CLKB
LVPECL_CLKA
LVPECL_CLKB
LVPECL_CLKA
LVPECL_CLKB
/LVPECL_CLKA
/LVPECL_CLKB
/LVPECL_CLKA
/LVPECL_CLKB
0
X
X
X
X
LOW
HIGH
LOW
HIGH
M9999-120205
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3
Precision Edge®
SY89829U
Micrel, Inc.
ABSOLUTE MAXIMUM RATINGS(1)
Symbol
VCCI / VCCO
VIN
Rating
Value
–0.5 to +4.0
–0.5 to VCCI
–50
Unit
V
VCC Pin Potential to Ground Pin
Input Voltage
V
IOUT
DC Output Current (Output HIGH)
Lead Temperature (soldering, 20sec.)
Storage Temperature
mA
°C
°C
TLEAD
Tstore
+260
–65 to +150
θJA
Package Thermal Resistance (Junction-to-Ambient)
With exposed pad soldered to GND
– Still-Air (multi-layer PCB)
23
18
15
°C/W
°C/W
°C/W
– 200lfpm (multi-layer PCB)
– 500lfpm (multi-layer PCB)
Exposed pad not soldered to GND
– Still-Air (multi-layer PCB)
– 200lfpm (multi-layer PCB)
– 500lfpm (multi-layer PCB)
44
36
30
°C/W
°C/W
°C/W
θJC
Package Thermal Resistance
(Junction-to-Case)
4.3
°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 book. Exposure to absolute maximum rating conditions for extended
periods may affect device reliability.
M9999-120205
hbwhelp@micrel.com or (408) 955-1690
4
Precision Edge®
SY89829U
Micrel, Inc.
DC ELECTRICAL CHARACTERISTICS
Power Supply
TA = –40°C
TA = +25°C
TA = +85°C
Symbol
Parameter
Min.
Typ.
Max.
Min.
Typ.
Max.
Min.
Typ.
Max.
Unit
VCCI,
VCCO
Power Supply(1)
2.37
—
3.6
2.37
—
3.6
2.37
—
3.6
V
ICC
ICC Total Supply Current(2)
—
100
150
—
100
150
—
100
150
mA
NOTES:
1. V
and V
must be connected together on the PCB such that they remain at the same potential. V
and V are not internally connected on the
CCO
CCI
CCO
CCI
die.
2. No load. Outputs floating.
LVDS Input (VCC = 2.37V to 3.6V, GND = 0V)
TA = –40°C
TA = +25°C
TA = +85°C
Symbol
VIN
Parameter
Input Voltage Range
Differential Input Swing
Input Low Current(1)
Min.
0
Typ.
Max.
2.4
—
Min.
0
Typ.
Max.
2.4
—
Min.
Typ.
—
Max.
2.4
—
Unit
V
—
—
—
—
0
VID
100
–1.0
80
100
–1.0
80
100
–1.0
80
—
mV
mA
Ω
IIL
—
—
—
—
—
—
RIN
LVDS Differential Input Resistance
(LVDS_CLK to /LVDS_CLK)
100
120
100
120
100
120
NOTE:
1. For I , both LVDS inputs are grounded.
IL
LVPECL Input / Output (VCC = 2.37V to 3.6V, GND = 0V)
TA = –40°C
TA = +25°C
Min. Max.
TA = +85°C
Symbol
VIH
Parameter
Input HIGH Voltage
Input LOW Voltage
Min.
Max.
Min.
Max.
Unit
V
VCC – 1.165 VCC – 0.88 VCC – 1.165 VCC – 0.88 VCC – 1.165 VCC – 0.88
VCC – 1.945 VCC – 1.625 VCC – 1.945 VCC – 1.625 VCC – 1.945 VCC – 1.625
VIL
V
VPP
Minimum Input Swing(1)
LVPECL_CLK
600
—
600
—
600
—
mV
VCMR
Common Mode Range(2)
LVPECL_CLK
–1.5
–0.4
–1.5
–0.4
–1.5
–0.4
V
VOH
VOL
Output HIGH Voltage
Output LOW Voltage
Input HIGH Current
Input LOW Current
VCCO – 1.085 VCCO – 0.880 VCCO – 1.025 VCCO – 0.880 VCCO – 1.025 VCCO – 0.880
VCCO – 1.830 VCCO – 1.555 VCCO – 1.810 VCCO – 1.620 VCCO – 1.810 VCCO – 1.620
V
V
IIH
—
150
—
—
150
—
—
150
—
µA
µA
IIL
0.5
0.5
0.5
NOTES:
1. The V (min.) is defined as the minimum input differential voltage which will cause no increase in the propagation delay.
PP
2. V
is defined as the range within which the V level may vary, with the device still meeting the propagation delay specification. The numbers in
IH
CMR
the table are referenced to V . The V level must be such that the peak-to-peak voltage is less than 1.0V and greater than or equal to V (min.).
CCI
IL
PP
The lower end of the CMR range varies 1:1 with V . The V
(min) will be fixed at 3.3V – |V
(min)|.
CCI
CMR
CMR
LVCMOS/LVTTL Control Input (OE1, OE2, CLK_SEL1, CLK_SEL2)
TA = –40°C
TA = +25°C
TA = +85°C
Symbol
VIH
Parameter
Input HIGH Voltage
Input LOW Voltage
Input HIGH Current
Input LOW Current
Min.
2.0
—
Typ.
—
Max.
—
Min.
2.0
—
Typ.
—
Max.
—
Min.
2.0
—
Typ.
—
Max. Unit
—
V
V
VIL
—
0.8
—
0.8
—
0.8
IIH
+20
—
—
–250
–600
+20
—
—
–250
–600
+20
—
—
–250
–600
µA
µA
IIL
—
—
—
M9999-120205
hbwhelp@micrel.com or (408) 955-1690
5
Precision Edge®
SY89829U
Micrel, Inc.
AC ELECTRICAL CHARACTERISTICS(1)
VCC = 2.37V to 3.6V, GND = 0V
TA = –40°C
TA = +25°C
TA = +85°C
Symbol
fMAX
Parameter
Max Toggle Frequency(2)
Propagation Delay
Min.
Typ.
Max.
Min.
Typ.
Max.
Min.
Typ.
Max.
Unit
GHz
ns
1
—
—
1
—
—
1
—
—
tPD
(Differential)(3)
LVPECL IN 0.900
—
—
1.5
1.7
0.900
1.1
1.2
—
1.5
1.7
0.900
1.1
—
—
1.5
1.7
LVDS IN
1.1
tSKEW
Within-Device Skew(4)
Part-to-Part Skew(5)
OE Set-Up Time(6)
OE Hold Time(6)
—
—
100
—
35
200
—
—
—
20
100
—
35
200
—
—
—
—
100
—
35
200
—
ps
ps
ns
ns
ps
—
tS(OE)
tH(OE)
1.0
0.5
300
1.0
0.5
300
1.0
0.5
300
—
—
—
—
—
—
tr
tf
Output Rise/Fall Time
(20% – 80%)
—
600
450
600
—
600
t(switchover) Input Switchover
CLK_SEL-to-valid output
—
—
1.2
—
—
1.2
—
—
1.2
ns
NOTES:
1. Outputs loaded with 50Ω to V – 2V. Airflow ≥ 300lfpm.
CC
2. f
is defined as the maximum toggle frequency measured. Measured with a 800mV input signal, output swing ≥ 200mV, and all loading with 50Ω
MAX
to V –2V.
CC
3. Differential propagation delay is defined as the delay from the crossing point of the differential input signals to the crossing point of the differential
output signals.
4. The within-device skew is defined as the worst case difference between any two similar delay paths within a single device operating at the same
voltage and temperature.
5. The part-to-part skew is defined as the absolute worst case difference between any two delay paths on any two devices operating at the same
voltage and temperature. Part-to-part skew is the total skew difference; pin-to-pin skew + part-to-part skew.
6. Set-up and hold time applies to synchronous applications that intend to enable/disable before the next clock cycle. For asynchronous applications,
set-up and hold time does not apply. OE set-up time is defined with respect to the rising edge of the clock. OE HIGH to LOW transition ensures
outputs remain disabled during the next clock cycle. OE LOW to HIGH transition enables normal operation of the next input clock.
M9999-120205
hbwhelp@micrel.com or (408) 955-1690
6
Precision Edge®
SY89829U
Micrel, Inc.
LVDS/LVPECL INPUTS
LVPECL Input Stage
LVDS Input Stage
Figure 1. Simplified LVPECL & LVDS Input Stage
M9999-120205
hbwhelp@micrel.com or (408) 955-1690
7
Precision Edge®
SY89829U
Micrel, Inc.
TYPICAL CHARACTERISTICS
Frequency Response
vs. Output Amplitude @ 2.5V
Frequency Response
vs. Output Amplitude @3.3V
800
800
700
600
500
400
300
200
100
0
700
600
500
400
300
200
100
0
0
200 400 600 800 1000 1200
FREQUENCY (MHz)
0
200 400 600 800 1000 1200
FREQUENCY (MHz)
M9999-120205
hbwhelp@micrel.com or (408) 955-1690
8
Precision Edge®
SY89829U
Micrel, Inc.
LVPECL TERMINATION RECOMMENDATIONS
down resistor at the output of each driver. The emmiter follower
outputs requires a DC current path to GND. Unused outputs can be
left floating with minimal impact on skew and jitter.
Output Considerations
Be sure to properly terminate all outputs as shown below, or
equivalent.ForACcoupledapplications,besuretoincludeapull
+3.3V
R1
130Ω
R1
130Ω
+3.3V
+3.3V
Z
O = 50Ω
Z
O = 50Ω
R2
82Ω
R2
82Ω
V = VCC —2V
t
Figure 1. Parallel Termination–Thevenin Equivalent
Notes:
1. For +2.5V systems:
R1 = 250Ω
R2 = 62.5Ω
+3.3V
+3.3V
Z = 50Ω
Z = 50Ω
“source”
“destination”
50Ω
50Ω
46Ω to 49Ω
R
b
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. R resistor sets the DC bias voltage equal to V . For +3.3V systems R = 46Ω to 50Ω.
b
t
b
4. Precision, low-cost 3-Resistor networks are available from resistor manufacturers such as Thin Film Technology (www.thinfilm.com).
M9999-120205
hbwhelp@micrel.com or (408) 955-1690
9
Precision Edge®
SY89829U
Micrel, Inc.
64 LEAD EPAD-TQFP (DIE UP) (H64-1)
0.472 BSC SQ.
4
12.00
10.00
+0.05
–0.05
1.00
0.039
DETAIL "A"
+0.002
–0.002
6
7
0.394
BSC SQ.
0° MIN.
0.20 0.008
+0.05
0.09 0.004
4.50
0.177
–0.05
+0.012
–0.012
0.15 0.006
0.05 0.002
64
48
6
48
0°- 7°
+0.03
4.50 –0.03
+0.012
+0.15
0.60
0.024
–0.15
+0.006
0.177
–0.012
–0.006
1.00 0.039 REF.
33
16
17
32
5
SEE DETAIL "A"
0.50 0.020
BSC
0.047 MAX
0.01 0.004
1.20
7
+0.05
0.22
0.009
–0.05
Rev. 03
+0.002
–0.002
MICREL, INC. 2180 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 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.
M9999-120205
hbwhelp@micrel.com or (408) 955-1690
10
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