ꢀ ꢁ ꢂ ꢃ ꢄꢅ ꢆ ꢇ ꢄꢈꢈ ꢉ ꢀꢁ ꢂꢃ ꢄ ꢅ ꢆꢇ ꢄ ꢈꢈ ꢊ
ꢋ ꢌ ꢍꢎꢏ ꢐꢑ ꢒꢌ ꢓ ꢀ ꢏ ꢌ ꢔꢌ ꢀꢕꢖ ꢂ ꢌ ꢔꢓ ꢕꢖ ꢑ ꢗꢒ ꢆꢎꢂ ꢂꢒ ꢗꢂ
SPRS073L − AUGUST 1998 − REVISED JUNE 2005
INPUT AND OUTPUT CLOCKS (CONTINUED)
†
timing requirements for ECLKIN (see Figure 16)
−150
−167
NO.
UNIT
MIN
MAX
1
2
3
4
t
t
t
t
Cycle time, ECLKIN
10
4.5
4.5
ns
ns
ns
ns
c(EKI)
Pulse duration, ECLKIN high
Pulse duration, ECLKIN low
Transition time, ECLKIN
w(EKIH)
w(EKIL)
t(EKI)
2.2
†
The reference points for the rise and fall transitions are measured at V MAX and V MIN.
IL IH
1
4
2
ECLKIN
3
4
Figure 16. ECLKIN Timings
द
switching characteristics over recommended operating conditions for ECLKOUT
(see Figure 17)
−150
−167
NO.
PARAMETER
UNIT
MIN
E − 0.7
MAX
1
2
3
4
5
6
t
t
t
t
t
t
Cycle time, ECLKOUT
E + 0.7
ns
ns
ns
ns
ns
ns
c(EKO)
Pulse duration, ECLKOUT high
EH − 0.7 EH + 0.7
EL − 0.7 EL + 0.7
2
w(EKOH)
w(EKOL)
Pulse duration, ECLKOUT low
Transition time, ECLKOUT
t(EKO)
Delay time, ECLKIN high to ECLKOUT high
Delay time, ECLKIN low to ECLKOUT low
1
1
7
7
d(EKIH-EKOH)
d(EKIL-EKOL)
‡
§
¶
The reference points for the rise and fall transitions are measured at V
E = ECLKIN period in ns
EH is the high period of ECLKIN in ns and EL is the low period of ECLKIN in ns.
MAX and V MIN.
OH
OL
ECLKIN
6
1
4
4
2
5
3
ECLKOUT
Figure 17. ECLKOUT Timings
48
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