Pha-Aligned Clock Multiplier
CY2303
Features
•3-multiplier configuration (1x, 2x, 4x Ref)
•10 MHz to 166.67 MHz operating range (reference input from 10 MHz to 41.67 MHz)•Pha Alignment •80 ps typical period jitter •Output enable pin •3.3V operation •5V Tolerant input
•8-pin 150-mil SOIC package
•Commercial and Industrial Temperature available
Functional Description
The CY2303 is a 3 output 3.3V pha-aligned system clock designed to distribute high-speed clocks in PC, workstation,datacom, telecom, and other high-performance applications.The part allows ur to obtain 1x, 2x, and 4x Ref output frequencies on respective output pins.
The CY2303 has an on-chip PLL, which locks to an input clock prented on the REFIN pin. The PLL feedback is internally connected to the REF output. The input-to-output skew is guaranteed to be less than ±200 ps, and output-to-output skew is guaranteed to be less than 200 ps.
Multiple CY2303 devices can accept the same input clock and distribute it in a system. In this ca, the skew between the outputs of two devices is guaranteed to be less than 400 ps. The CY2303 is available in commercial and industrial temper-ature ranges.
Selector Guide
Part Number Outputs
Input Frequency Range Output Frequency Range Specifics
CY2303SC,CY2303SXC 310 MHz–41.67 MHz 10 MHz–166.67 MHz
Commercial Temperature
CY2303SI,CY2303SXI
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10 MHz–41.67 MHz
10 MHz–166.67 MHz Industrial Temperature
PLL
REF
REFx2REFx4
OE
x1
x2
x4
12345876REF GND REFIN N/C
V DD OE REFx2
Top View
8-pin SOIC
REFx4REFIN
Block Diagram
Pin Configuration
FBK
Maximum Ratings
Supply Voltage to –0.5V to +7.0V DC Input Voltage (Except Ref)...............
–0.5V to V DD + 0.5V DC Input –0.5 to 7V Storage Temperature .................................–65°C to +150°C 150°C Static Discharge Voltage
(per MIL-STD-883, Method 3015) (2000)
Pin Description
三星手机截屏Pin Signal[1]Description
1REF REF output (1x Reference input)
2GND Ground
3REFIN Input reference frequency, 5V tolerant input
4N/C No Connect
5REFx22x Reference input
6REFx44x Reference input
7VDD 3.3V Supply
8OE Output Enable (weak pull-up)
不用诉离殇
Operating Conditions for CY2303SC Commercial Temperature Devices
Parameter Description Min.Max.Unit V DD Supply Voltage 3.0 3.6V T A Operating Temperature (Ambient Temperature)070°C C L Load Capacitance, Fout < 133.33 MHz–18pF
Load Capacitance, 133.33 MHz < Fout < 166.67 MHz–12pF C IN Input Capacitance–7pF t PU Power-up time for all VDDs to reach minimum specified voltage (power
ramps must be monotonic)
0.0550ms
Electrical Characteristics for CY2303SC Commercial Temperature Devices Parameter Description Test Conditions Min.Max.Unit V IL Input LOW Voltage–0.8V V IH Input HIGH Voltage 2.0–V I IL Input LOW Current V IN = 0V–100µA I IH Input HIGH Current V IN = V DD–50µA V OL Output LOW Voltage[2]I OL = 8 mA –0.4V V OH Output HIGH Voltage[2]I OH = –8 mA 2.4–V I DD Supply Current Unloaded outputs, REFIN = 41.67 MHz–45mA
Unloaded outputs, REFIN = 25 MHz –32mA
Unloaded outputs, REFIN = 10 MHz–18mA Notes:
1.Weak pull-down on all outputs.
2.Parameter is guaranteed by design and characterization. It is not 100% tested in production.
Switching Characteristics for CY2303SC Commercial Temperature Devices
Parameter Name Test Conditions Min.Typ.Max.Unit 1/t1Output Frequency18-pF load10–133.33MHz
12-pF load––166.67MHz Duty Cycle[3] = t2÷ t1Measured at V DD/2405060% t3Ri Time[3]Measured between 0.8V and 2.0V–– 1.20ns t4Fall Time[3]Measured between 0.8V and 2.0V–– 1.20ns
t5Output to Output Skew on rising
edges[3]All outputs equally loaded
Measured at V DD/2
––200ps
t6Delay, REFIN Rising Edge to
REF Rising Edge[3]Measured at V DD/2 from REFIN to any
output
––±200ps
t7Device to Device Skew[3]Measured at V DD/2 on the REF pin of the
device (pin 1)
––400ps
t J Period Jitter[3]Measured at Fout < 133.33 MHz, loaded
outputs, 18-pF load
–80±175ps
t LOCK PLL Lock Time[3]Stable power supply, valid clocks prented
on REFIN
–– 1.0ms Operating Conditions for CY2303SI Industrial Temperature Devices
Parameter Description Min.Max.Unit V DD Supply Voltage 3.0 3.6V
T A Operating Temperature (Ambient Temperature)–4085°C
C L Load Capacitance, Fout <133.33 MHz–15pF
Load Capacitance, 133.33 MHz < Fout < 166.67 MHz,–10pF
t PU Power-up time for all VDDs to reach minimum specified voltage
(power ramps must be monotonic)
0.0550ms Electrical Characteristics for CY2303SI Industrial Temperature Devices
Parameter Description Test Conditions Min.Max.Unit V IL Input LOW Voltage–0.8V
V IH Input HIGH Voltage 2.0–V
I IL Input LOW Current V IN = 0V–100µA
I IH Input HIGH Current V IN = V DD–50µA
V OL Output LOW Voltage[2]I OL = 8 mA –0.4V
V OH Output HIGH Voltage[2]I OH = –8 mA 2.4–V
I DD Supply Current Unloaded outputs, REFIN = 41.67 MHz–48mA
Unloaded outputs, REFIN = 25 MHz–35mA
Unloaded outputs, REFIN = 10 MHz–20mA Note:
3.All parameters are specified with loaded outputs.
Switching Characteristics for CY2303SI Industrial Temperature Devices
Parameter Name
Test Conditions
Min.Typ.Max.Unit 1/t 1
Output Frequency 15-pF load 10–133.33MHz 10-pF load ––166.67MHz Duty Cycle [3] = t 2 ÷ t 1
Measured at V DD /2
405060%t 3Ri Time [3]Measured between 0.8V and 2.0V –– 1.20ns t 4Fall Time [3]
Measured between 0.8V and 2.0V
–– 1.20ns t 5Output to Output Skew on rising edges [3]All outputs equally loaded Measured at V DD /2––200ps t 6Delay, REFIN Rising Edge to REF Rising Edge [3]Measured at V DD /2 from REFIN to any output
––±200ps t 7Device to Device Skew [3]Measured at V DD /2 on the REF pin of the device (pin 1)
––400ps t J Period Jitter [3]Measured at Fout < 133.33 MHz, loaded outputs, 15-pF load
–80±175ps t LOCK
PLL Lock Time [3]
Stable power supply, valid clocks prented on REFIN
–
–
1.0
ms
Switching Waveforms
Duty Cycle Timing
t 1
庙底沟遗址
形容比赛的成语t 2
V DD /2
All Outputs Ri/Fall Time
OUTPUT
t 3
3.3V 0V
0.8V 2.0V 2.0V 0.8V
公意t 4
Output-Output Skew
V DD /2
t 5
OUTPUT
OUTPUT
V DD /2
Test Circuits
Switching Waveforms (continued)
Input-Output Propagation Delay
V DD /2
中山美食攻略t 6
INPUT
FBK
V DD /2
V DD /2
t 7
FBK, Device 1
FBK, Device 2
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Device-Device Skew
V DD /2
0.1µF
V DD
CLK OUT C LOAD
OUTPUTS
GND
Test Circuit # 1Ordering Information
Ordering Code Package Type
Operating Range
CY2303SC 8-Pin 150-mil SOIC
Commercial CY2303SCT 8-Pin 150-mil SOIC - Tape and Reel Commercial CY2303SI 8-Pin 150-mil SOIC
Industrial CY2303SIT 8-Pin 150-mil SOIC - Tape and Reel
Industrial
Lead-free
CY2303SXC 8-Pin 150-mil SOIC
Commercial CY2303SXCT 8-Pin 150-mil SOIC - Tape and Reel Commercial CY2303SXI 8-Pin 150-mil SOIC
Industrial CY2303SXIT
8-Pin 150-mil SOIC - Tape and Reel
Industrial
