CSP1027 Datasheet, PDF (56/64 Pages) Agere Systems – CSP1027 Voice Band Codec for Cellular Handset and Modem Applications

CSP1027 Voice Band Codec for
Cellular Handset and Modem Applications
Data Sheet
December 1999
11 Timing Characteristics and Requirements (continued)
11.1 Clock Generation
VIH–
CLK^* _VIL–
VOH–
CKO1^† _VOL–
VOH–
CKO2^‡ _VOL–
t1
t3
t2
t7
t8
* OSCEN = 0 shown.
† CDIV0 = 2, CDIV1 = 1 configuration shown (see Table 8 on page 27).
‡ CDIV2 = 4 option shown (see Table 8 on page 27).
Figure 39. Clock Timing Diagram
5-7618 (F)
Table 24. Timing Requirements for Input Clock
Abbreviated
Reference
t1
t2
t3
Parameter
Clock In Period (high to high)
Clock In Low Time (low to change)
Clock In High Time (high to change)
* Device is fully static, t1 is tested at 500 ns.
Table 25. Timing Characteristics for Output Clocks
Abbreviated
Reference
Parameter
t7
Clock Out 1 Delay (valid to valid)
t8
Clock Out 2 Delay (valid to valid)
5.0 V
3.3 V
3.0 V
Unit
Min Max Min Max Min Max
25 —* 42 —* 60 —* ns
11 — 19 — 27 —
ns
11 — 19 — 27 —
ns
5.0 V
3.3 V
3.0 V
Unit
Min Max Min Max Min Max
— 30 — 54 — 66 ns
— 20 — 40 — 50 ns
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Lucent Technologies Inc.