SPRS292A − OCTOBER 2005 − REVISED NOVEMBER 2005
INPUT AND OUTPUT CLOCKS (CONTINUED)
timing requirements for ECLKIN† (see Figure 25)
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| ZDPA−167 |
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| −200 | UNIT |
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| −250 |
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| MIN MAX |
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| 1 | tc(EKI) | Cycle time, ECLKIN |
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| 10 | ns | |||||||
| 2 | tw(EKIH) | Pulse duration, ECLKIN high |
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| 4.5 | ns | |||||||
| 3 | tw(EKIL) | Pulse duration, ECLKIN low |
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| 4.5 | ns | |||||||
| 4 | tt(EKI) | Transition time, ECLKIN |
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| 3 | ns | |||||||
| †The | reference points for the rise and fall transitions are measured at V | MAX and V MIN. |
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| IL |
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| IH |
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| 1 |
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| 4 |
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| ECLKIN |
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| 2 |
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Figure 25. ECLKIN Timings
switching characteristics over recommended operating conditions for ECLKOUTद (see Figure 26)
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| ZDPA−167 |
| |
NO. |
| PARAMETER | −200 | UNIT | |
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| −250 |
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| MIN | MAX |
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1 | tc(EKO) | Cycle time, ECLKOUT | E − 0.9 | E + 0.9 | ns |
2 | tw(EKOH) | Pulse duration, ECLKOUT high | EH − 0.9 | EH + 0.9 | ns |
3 | tw(EKOL) | Pulse duration, ECLKOUT low | EL − 0.9 | EL + 0.9 | ns |
4 | tt(EKO) | Transition time, ECLKOUT |
| 2 | ns |
5 | Delay time, ECLKIN high to ECLKOUT high | 1 | 6.5 | ns | |
6 | Delay time, ECLKIN low to ECLKOUT low | 1 | 6.5 | ns |
‡The reference points for the rise and fall transitions are measured at VOL MAX and VOH MIN.
§E = ECLKIN period in ns
¶EH is the high period of ECLKIN in ns and EL is the low period of ECLKIN in ns.
ECLKIN
6 | 2 | 1 | 4 | 4 |
5 | 3 |
ECLKOUT
Figure 26. ECLKOUT Timings
70 | POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443 |