NB2304A PDF даташит
Спецификация NB2304A изготовлена «ON Semiconductor» и имеет функцию, называемую «Zero Delay Clock Buffer». |
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Детали детали
Номер произв | NB2304A |
Описание | Zero Delay Clock Buffer |
Производители | ON Semiconductor |
логотип |
10 Pages
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NB2304A
3.3 V Zero Delay
Clock Buffer
The NB2304A is a versatile, 3.3 V zero delay buffer designed to
distribute high−speed clocks in PC, workstation, datacom, telecom
and other high−performance applications. It is available in an 8 pin
package. The part has an on−chip PLL which locks to an input clock
presented on the REF pin. The PLL feedback is required to be driven
to FBK pin, and can be obtained from one of the outputs. The
input−to−output propagation delay is guaranteed to be less than
250 ps, and the output−to−output skew is guaranteed to be less than
200 ps.
The NB2304A has two Banks of two outputs each. Multiple
NB2304A devices can accept the same input clock and distribute it. In
this case, the skew between the outputs of the two devices is
guaranteed to be less than 500 ps.
The NB2304A is available in two different configurations (Refer to
NB2304A Configurations Table). The NB2304Ax1* is the base part,
where the output frequencies equal the reference if there is no counter
in the feedback path. The NB2304Ax1H is the high−drive version of
the −1 and the rise and fall times on this device are much faster.
The NB2304Ax2 allows the user to obtain REF, 1/2 X and 2X
frequencies on each output Bank. The exact configuration and output
frequencies depend on which output drives the feedback pin.
Features
• Zero Input − Output Propagation Delay, Adjustable by Capacitive
Load on FBK Input
• Multiple Configurations − Refer to NB2304A Configurations Table
• Input Frequency Range: 15 MHz to 133 MHz
• Multiple Low−Skew Outputs
• Output−Output Skew < 200 ps
• Device−Device Skew < 500 ps
• Two Banks of Four Outputs
• Less than 200 ps Cycle−to−Cycle Jitter (−1, −1H, −5H)
• Available in Space Saving, 8 pin 150 mil SOIC Package
• 3.3 V Operation
• Advanced 0.35 m CMOS Technology
• Industrial Temperature Available
• These are Pb−Free Devices
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1
SOIC−8
D SUFFIX
CASE 751
MARKING
DIAGRAM*
8
XXXX
ALYW
G
1
XXXX = Device Code
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
G = Pb−Free Package
*For additional marking information, refer to
Application Note AND8002/D.
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 9 of this data sheet.
*x = C for Commercial; I for Industrial.
© Semiconductor Components Industries, LLC, 2006
November, 2006 − Rev. 5
1
Publication Order Number:
NB2304A/D
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NB2304A
FBK
REF
CLKA1
PLL
CLKA2
B2 Extra Divider (−2)
CLKB1
Figure 1. Basic Block Diagram
(see Figures 11 and 12 for device specific Block Diagrams)
CLKB2
Table 1. CONFIGURATIONS (x = C for Commercial; I for Industrial)
Device
Feedback From
Bank A Frequency
NB2304Ax1
Bank A or Bank B
Reference
NB2304Ax1H
Bank A or Bank B
Reference
NB2304Ax2
Bank A
Reference
NB2304Ax2
Bank B
2 X Reference
Bank B Frequency
Reference
Reference
Reference B2
Reference
REF 1
CLKA1 2
CLKA2 3
GND 4
NB2304A
8 FBK
7 VDD
6 CLKB2
5 CLKB1
Figure 2. Pin Configuration
Table 2. PIN DESCRIPTION
Pin # Pin Name
Description
1 REF (Note 1) Input reference frequency, 5 V
tolerant input.
2 CLKA1 (Note 2) Buffered clock output, Bank A.
3 CLKA2 (Note 2) Buffered clock output, Bank A.
4
GND
Ground.
5 CLKB1 (Note 2) Buffered clock output, Bank B.
6 CLKB2 (Note 2) Buffered clock output, Bank B.
7 VDD 3.3 V supply.
8 FBK PLL feedback input.
1. Weak pulldown.
2. Weak pulldown on all outputs.
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NB2304A
Table 3. MAXIMUM RATINGS
Parameter
Min Max Unit
Supply Voltage to Ground Potential
−0.5 +7.0
V
DC Input Voltage (Except REF)
DC Input Voltage (REF)
−0.5
−0.5
VDD + 0.5
7
V
V
Storage Temperature
−65 +150
°C
Maximum Soldering Temperature (10 sec)
260 °C
Junction Temperature
150 °C
Static Discharge Voltage (per MIL−STD−883, Method 3015)
> 2000
V
Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit
values (not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied,
damage may occur and reliability may be affected.
Table 4. OPERATING CONDITIONS FOR COMMERCIAL AND INDUSTRIAL TEMPERATURE DEVICES
Parameter
VDD
TA
Description
Supply Voltage
Operating Temperature (Ambient Temperature)
Commercial
Industrial
Min
3.0
0
−40
Max
3.6
70
85
CL Load Capacitance, 15 MHz to 100 MHz
CL Load Capacitance, from 100 MHz to 133 MHz
CIN Input Capacitance (Note 3)
3. Applies to both REF Clock and FBK.
30
15
7
Unit
V
°C
pF
pF
pF
Table 5. ELECTRICAL CHARACTERISTICS FOR COMMERCIAL TEMPERATURE DEVICES
Parameter
VIL
VIH
IIL
IIH
VOL
Description
Input LOW Voltage
Input HIGH Voltage
Input LOW Current
Input HIGH Current
Output LOW Voltage
VOH Output HIGH Voltage
IDD Supply Current
Test Conditions
Min
VIN = 0 V
VIN = VDD
IOL = 8 mA (−1, −2)
IOL = 12 mA (−1H)
IOH = −8 mA (−1, −2)
IOH = −12 mA (−1H)
Unloaded outputs 100 MHz REF
Select inputs at VDD or GND
Unloaded outputs, 66 MHz REF (−1, −2)
Unloaded outputs, 33 MHz REF (−1, −2)
2.0
2.4
Max
0.8
50.0
100.0
0.4
45
32
18
Unit
V
V
mA
mA
V
V
mA
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NB2304A | Zero Delay Clock Buffer | ON Semiconductor |
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