Cypress CY2291 - Manual (Page 9)

CY2291
Document #: 38-07189 Rev. *C Page 9 of 12
t
6
Output Enable
Time Time for output to leave three-state mode after
SHUTDOWN/OE goes HIGH 10 15 ns
t
7
Skew Skew delay between any identical or related outputs [3,
12, 15]
< 0.25 0.5 ns
t
8
CPUCLK Slew Frequency transition rate 1.0 20.0 MHz/ms
t
9A
Clock Jitter
[14] Peak-to-peak period jitter (t
9A
Max. – t
9A
min.),% of
clock period (f
OUT
< 4 MHz)
< 0.5 1 %
t
9B
Clock Jitter [14] Peak-to-peak period jitter (t
9B
Max. – t
9B
min.) (4 MHz
< f
OUT
< 16 MHz)
< 0.7 1 ns
t
9C
Clock Jitter
[14] Peak-to-peak period jitter
(16 MHz < f
OUT
< 50 MHz)
< 400 500 ps
t
9D
Clock Jitter [14] Peak-to-peak period jitter (f
OUT
> 50 MHz) < 250 350 ps
t
10A
Lock Time for
CPLL Lock Time from Power Up < 25 50 ms
t
10B
Lock Time for
UPLL and SPLL Lock Time from Power Up < 0.25 1 ms
Slew Limits CPU PLL Slew Limits CY2291I 8 66.6 MHz
CY2291FI 8 60 MHz
Switching Waveforms
Switching Characteristics, Industrial 3.3V (continued)
Parameter Name Description Min. Typ. Max. Unit
t
1
OUTPUT
t
2
t
3
t
4
Figure 2. All Outputs, Duty Cycle and Rise/Fall Time
Figure 3. Output Three-State Timing [4]
t
5
OE
ALL
THREE-STATE
OUTPUTS
t
6
t
7
CLK
OUTPUT
RELATED
CLK
t
9A
Figure 4. CLK Outputs Jitter and Skew
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