CY7B9945V-2AC(2003) データシートの表示（PDF） - Cypress Semiconductor
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CY7B9945V-2AC Datasheet PDF : 10 Pages
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RoboClock
CY7B9945V
Capacitance
Parameter
CIN
Description
Input Capacitance
Test Conditions
TA = 25°C, f = 1 MHz, VCC = 3.3V
Min.
–
Max.
Unit
5
pF
Switching Characteristics Over the Operating Range [7, 8, 9, 10, 11]
CY7B9945V-2 CY7B9945V-5
Parameter
Description
Min. Max. Min. Max. Unit
fin
Clock Input Frequency
24 200 24 200 MHz
fout
Clock Output Frequency
24 200 24 200 MHz
tSKEWPR Matched-Pair Skew[12, 13],1Q[0:1],1Q[2:3],2Q[0:1],2Q[2:3],2Q[4:5]
– 200 – 200 ps
tSKEWBNK Intrabank Skew[12, 13]
– 250 – 250 ps
tSKEW0
Output-Output Skew (same frequency and phase, rise to rise, fall to fall)[12, 13] –
250
–
550
ps
tSKEW1
Output-Output Skew (same frequency and phase, other banks at
different frequency, rise to rise, fall to fall)[12, 13]
– 250 – 650 ps
tSKEW2
tCCJ1-3
Output-Output
tSKEW1)[12, 13]
Skew
(all
output
configurations
outside
of
tSKEW0
and
–
500
– 800 ps
Cycle-to-Cycle Jitter (divide by 1 output frequency, FB = divide by 1, 2, 3) – 150 – 150 ps
Peak-
Peak
tCCJ4-12
Cycle-to-Cycle Jitter (divide by 1 output frequency, FB = divide by 4, 5, –
100
–
100
ps
6, 8, 10, 12)
Peak-
Peak
tPD
Propagation Delay, REF to FB Rise
–250 250 –500 500 ps
TTB
Total Timing Budget window (same frequency and phase)[14, 15]
– 500 – 700 ps
tPDDELTA
tREFpwh
tREFpwl
tr/tf
Propagation Delay difference between two devices[16]
REF input (Pulse Width HIGH)[5]
REF input (Pulse Width LOW)[5]
Output Rise/Fall Time[17]
– 200 – 200 ps
2.0
–
2.0
–
ns
2.0
–
2.0
–
ns
0.15 2.0 0.15 2.0
ns
tLOCK
PLL Lock TIme From Power-Up
–
10
–
10
ms
tRELOCK1 PLL Relock Time (from same frequency, different phase) with Stable
–
500
–
500
µs
Power Supply
tRELOCK2
PLL Re-Lock Time (from different frequency, different phase) with Stable
Power Supply[18]
–
1000
–
1000
µs
tODCV
tPWH
tPWL
tPDEV
tOAZ
tOZA
Output duty cycle deviation from 50%[11]
–1.0 1.0 –1.0 1.0
ns
Output HIGH time deviation from 50%[19]
–
1.5
–
1.5
ns
Output LOW time deviation from 50%[19]
–
2.0
–
2.0
ns
Period deviation when changing from reference to reference[20]
– 0.025 – 0.025 UI
DIS[1:2] HIGH to output high-impedance from ACTIVE[12, 21]
1.0 10 1.0 10
ns
DIS[1:2] LOW to output ACTIVE from output is high-impedance[21, 22] 0.5
14
0.5
14
ns
Notes:
7. This is for non-three-level inputs.
8. Assumes 25 pF Max. Load Capacitance up to 185 MHz. At 200 MHz the max. load is 10 pF.
9. Both outputs of pair must be terminated, even if only one is being used.
10. Each package must be properly decoupled.
11. AC parameters are measured at 1.5V, unless otherwise indicated.
12. Test Load CL= 25 pF, terminated to VCC/2 with 50Ω up to185 MHz and 10-pF load to 200 MHz.
13. SKEW is defined as the time between the earliest and the latest output transition among all outputs for which the same phase delay has been selected when
all outputs are loaded with 25 pF and properly terminated up to 185 MHz. At 200 MHz the max load is 10 pF.
14. Tested initially and after any design or process changes that may affect these parameters.
15. TTB is the window between the earliest and the latest output clocks with respect to the input reference clock across variations in output frequency, supply
voltage, operating temperature, input clock edge rate, and process. The measurements are taken with the AC test load specified and include output-output
skew, cycle-cycle jitter, and dynamic phase error. TTB will be equal to or smaller than the maximum specified value at a given output frequency.
16. Guaranteed by statistical correlation. Tested initially and after any design or process changes that may affect these parameters.
17. Rise and fall times are measured between 2.0V and 0.8V.
18. fNOM must be within the frequency range defined by the same FS state.
19. tPWH is measured at 2.0V. tPWL is measured at 0.8V.
Document #: 38-07336 Rev. *D
Page 7 of 10
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