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參數(shù)資料
| 型號： | TSX88915TMW100 |
| 廠商： | E2V TECHNOLOGIES PLC |
| 元件分類： | 時鐘及定時 |
| 英文描述： | PLL BASED CLOCK DRIVER, 7 TRUE OUTPUT(S), 1 INVERTED OUTPUT(S), CQCC28 |
| 封裝： | CERAMIC, LCC-28 |
| 文件頁數(shù)： | 3/20頁 |
| 文件大?。?/td> | 168K |
| 代理商： | TSX88915TMW100 |
TS88915T
11/20
5. APPLICATION INFORMATION
5.1. General AC specification notes
1. Several specifications can only be measured when th TS88915T is in phase–locked operation. TS88915T units were
fabricated with key transistor properties intentionally varied to create a 14 cell designed experimental matrix.
2. These two specs (tRISE/FALL and tPULSE WIDTH 2X_Q output) guarantee that the TS88915T meets the 33MHz TS68040
P–Clock input specification (at 66MHz). For these two specs to be guaranteed by TCS, the termination scheme shown
below in Figure 5 must be used.
Z0 (CLOCK TRACE)
Rp
Rs
Rs=Z0–7
W
Rp=1.5Z0
TS88915
2X_Q
Output
TS68040
P–Clock
Input
Figure 5 : TS68040 P–Clock input termination scheme
3 To meet the 25 MHz TS68040 P–clock input specification (2 x Q tpulse width at 50 Mhz) FREQ–SEL must be low. This
configuration improve the accuracy of the 88915T duty cycle.
4. The wiring diagrams and explanations in Figure 8, 9 and 10 demonstrate the input and output frequency relationships for
three possible feedback configurations. The allowable SYNC input range for each case is also indicated. There are two
allowable SYNC frequency ranges, depending whether FREQ_SEL is high or low. Although not shown, it is possible to feed
back the Q5 output, thus creating a 180
° phase shift between the SYNC input and the ”Q” outputs. Table 3 below
summarizes the allowable SYNC frequency range for each possible configuration.
FREQ_SEL
Level
FEEDBACK
Output
Allowable SYNC Input
Frequency Range (MHz)
Corresponding VCO
Frequency Range
Phase Relation-
ships of the ”Q”
Outputs to Rising
SYNC Edge
HIGH
Q/2
5 to (2X_Q FMAX Spec)/4
20 to (2X_Q FMAX Spec)
0
°
HIGH
any ”Q” (Q0–Q4)
(_
)
10 to (2X_Q FMAX Spec)/2
(_
)
20 to (2X_Q FMAX Spec)
0°
HIGH
Q5
10 to (2X_Q FMAX Spec)/2
20 to (2X_Q FMAX Spec)
180°
HIGH
2X_Q
20 to (2X_Q FMAX Spec)
0°
LOW
Q/2
any ”Q” (Q0–Q4)
Q5
2X_Q
2.5 to (2X_Q FMAX Spec)/8
5 to (2X_Q FMAX Spec)/4
10 to (2X_Q FMAX Spec)/2
20 to (2X_Q FMAX Spec)
0
°
0°
180°
0°
Table 3 : Allowable SYNC input frequency range for different feedback configurations
相關(guān)PDF資料 |
PDF描述 |
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| TT-SMD-FREQ-17-3OT-EXT-T-STBY1-TOL2 | QUARTZ CRYSTAL RESONATOR, 30.1 MHz - 90 MHz |
| TT-SMD-FREQ-20-3OT-T-STBY1-TOL1 | QUARTZ CRYSTAL RESONATOR, 30.1 MHz - 90 MHz |
| TT-SMD-FREQ-20-EXT-T-STBY1-TOL2 | QUARTZ CRYSTAL RESONATOR, 3.579545 MHz - 30 MHz |
| TT-SMD-FREQ-12-3OT-EXT-T-STBY1-TOL2 | QUARTZ CRYSTAL RESONATOR, 30.1 MHz - 90 MHz |
| TT-SMD-FREQ-14-3OT-EXT-T-STBY2-TOL1 | QUARTZ CRYSTAL RESONATOR, 30.1 MHz - 90 MHz |
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