ꢀ ꢁ ꢂ ꢃ ꢄꢅ ꢆꢇ ꢈꢉꢄ ꢅ
ꢊ ꢋ ꢌꢍ ꢎꢏꢐ ꢑꢋ ꢒ ꢀ ꢎ ꢋ ꢓꢋ ꢀꢔꢕ ꢂ ꢋ ꢓꢒ ꢔꢕ ꢐ ꢖꢑ ꢇꢍꢂ ꢂꢑ ꢖ
SPRS080F − MARCH 1999 − REVISED OCTOBER 2008
bypass option
An external frequency can be used by injecting the frequency directly into CLKIN.
The external frequency injected must conform to specifications listed in the timing requirements table.
switching characteristics over recommended operating conditions [H = 0.5t
and the recommended operating conditions table)
] (see Figure 12
c(CO)
PARAMETER
MIN
10
4
TYP
MAX
UNIT
ns
t
Cycle time, CLKOUT
t
c(CO)
c(CI)
10
t
Delay time, CLKIN high/low to CLKOUT high/low
Fall time, CLKOUT
16
ns
d(CIH-CO)
t
2
2
ns
f(CO)
t
t
t
Rise time, CLKOUT
ns
r(CO)
Pulse duration, CLKOUT low
Pulse duration, CLKOUT high
H − 2
H − 2
H − 1
H − 1
H
H
ns
w(COL)
w(COH)
ns
timing requirements (see Figure 12)
MIN
MAX
UNIT
ns
†
t
t
t
Cycle time, CLKIN
Fall time, CLKIN
Rise time, CLKIN
10
c(CI)
f(CI)
r(CI)
8
8
ns
ns
†
This device utilizes a fully static design and therefore can operate with t
approaching 0 Hz.
approaching 1. The device is characterized at frequencies
c(CI)
t
f(CI)
t
r(CI)
t
c(CI)
CLKIN
t
d(CI-CO)
t
f(CO)
t
w(COH)
t
c(CO)
t
w(COL)
t
r(CO)
Unstable
CLKOUT
Figure 12. Timing Diagram for Bypass Mode
44
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