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參數(shù)資料
| 型號(hào)： | MB551 |
| 廠商： | Fujitsu Limited |
| 英文描述： | Prescaler with VCO (Dual-Modulus, 1.0 GHz)(帶壓控振蕩器的預(yù)定標(biāo)器) |
| 中文描述： | 與VCO的預(yù)分頻器（雙模量，1.0千兆赫）（帶壓控振蕩器的預(yù)定標(biāo)器） |
| 文件頁(yè)數(shù)： | 2/17頁(yè) |
| 文件大?。?/td> | 178K |
| 代理商： | MB551 |
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MB551
(Continued)
Pulse swallow method: Division-by-128/129 prescaler
Prescaler output with termination circuit: V l = 1.6 V
P
-
P
I
PIN ASSIGNMENT
I
TIMING DIAGRAM (Example of Dual-modulus, division-by-128/129 type)
M pin = High: Division by 128
M pin = Low: Division by 129
(V
IH
= 2.0 V min, V
Division plus one makes the high-to-low transition longer by one cycle of the frequency-divided signal.
Setup time (t
SET
) from input of the M signal to change in the divide ratio of the prescaler is 16 ns (typical).
IL
= 0.8 V max.)
(Top view)
(FPT-8P-M01)
f
VCO
V
CC
M
OUT
GND
E
C
B
8
7
6
5
1
2
3
4
Pin No.
1
2
3
4
5
6
7
8
Symbol
f
VCO
V
CC
M
OUT
B
C
E
GND
Function
VCO signal pin
Power supply pin
Module setting pin
Prescaler output pin
Oscillator transistor base pin
Oscillator transistor collector pin
Oscillator transistor emitter pin
Ground pin
64 cycles
65 cycles
64 cycles
64 cycles
64
64
65
64
65
64
64
129 cycles
128 cycles
t
SET
t
SET
64
64
64
64
IN
OUT
M
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