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參數(shù)資料
| 型號(hào)： | UMA1005 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Dual low-power frequency synthesizer |
| 中文描述： | 雙低功耗頻率合成器 |
| 文件頁(yè)數(shù)： | 9/24頁(yè) |
| 文件大?。?/td> | 88K |
| 代理商： | UMA1005 |
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November 1994
9
Philips Semiconductors
Preliminary specification
Dual low-power frequency synthesizer
UMA1005T
Table 2
Selection of prescaler ratio
Notes
1.
2.
X = don’t care.
When the fractional accumulator overflows.
The total division ratio from prescaler to the phase detector expressions are given in Table 3.
Table 3
Total division from prescaler to phase detector expressions
Note
1.
When the fractional accumulator overflows.
When the prescaler ratio is R2 = R1 + 1 the total division ratio N
′
= N + 1.
Table 4
Modulus prescaler
COUNTER
STATUS
(
NM1
1) to 0
(
NM1
1) to
1
1 to NM2
0 to NM2
0 to NM3
0 to NM4
FB1
FB2
PRESCALER RATIO
(1)
1
1
0
0
0
1
0
0
0
0
1
1
R1
R1
(2)
R2
R2
(2)
R3; if PR = 1X
R4; if PR = 11 or 00
CONDITION
EXPRESSION
PR = 01
N = (NM1 + 2)
×
R1 + NM2
×
R2
N
′
= (NM1 + 1)
×
R1 + (NM2 + 1)
×
R2; note 1
N = (NM1 + 2)
×
R1 + NM2
×
R2 + (NM3 + 1)
×
R3
N
′
= (NM1 + 1)
×
R1 + (NM2 + 1)
×
R2 + (NM3 + 1)
×
R3; note 1
N = (NM1 + 2)
×
R1 + NM2
×
R2 + (NM3 + 1)
×
R3 + (NM4 + 1)
×
R4
N
′
= (NM1 + 1)
×
R1 + (NM2 + 1)
×
R2 + (NM3 + 1)
×
R3 + (NM4 + 1)
×
R4; note 1
N = (NM1 + 2)
×
R1 + NM2
×
R2 + (NM4 + 1)
×
R4
N
′
= (NM1 + 1)
×
R1 + (NM2 + 1)
×
R2 + (NM4 + 1)
×
R4; note 1
PR = 10
PR = 11
PR = 00
PR
MODULUS PRESCALER
BIT CAPACITY
NM1
NM2
NM3
4
4
NM4
00
01
10
11
4
2
3
4
12
12
12
12
4
8
4
4
4
4
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| UMA1005T | 制造商:PHILIPS-SEMI 功能描述: |
| UMA1005TD | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Serial-Input Frequency Synthesizer |
| UMA1005TD-T | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Serial-Input Frequency Synthesizer |
| UMA100A | 制造商:MICROSEMI 制造商全稱:Microsemi Corporation 功能描述:ULTRAMITE SURFACE MOUNT 500 Watt Transient Voltage Suppressor 5.0 to 170 V |
| UMA100CA | 制造商:MICROSEMI 制造商全稱:Microsemi Corporation 功能描述:ULTRAMITE SURFACE MOUNT 500 Watt Transient Voltage Suppressor 5.0 to 170 V |
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