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NJ8821BADP

更新时间： 2024-01-11 18:05:27
品牌 Logo 应用领域
通用电气 - GE 计数器微处理器光电二极管
页数 文件大小 规格书
5页 110K
描述
FREQUENCY SYNTHESISER (MICROPROCESSOR INTERFACE) WITH RESETTABLE COUNTERS

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中文翻译

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NJ8821BADP 技术参数

生命周期：Transferred包装说明：,
Reach Compliance Code：unknown风险等级：5.72
Is Samacsys：NBase Number Matches：1

NJ8821BADP 数据手册

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DS3278-1.3  
NJ8821  
FREQUENCY SYNTHESISER (MICROPROCESSOR INTERFACE)  
WITH RESETTABLE COUNTERS  
T
he NJ8821 is a synthesiser circuit fabricated on the GPS  
CMOS process and is capable of achieving high sideband  
attenuation and low noise performance. It contains a reference  
oscillator, 11-bit programmable reference divider, digital and  
sample-and-holdcomparators,10-bitprogrammable‘M’counter,  
7-bit programmable ‘A’ counter and the necessary control and  
latch circuitry for accepting and latching the input data.  
Data is presented as eight 4-bit words under external control  
from a suitable microprocessor..  
20  
19  
18  
17  
16  
15  
14  
13  
12  
11  
1
2
3
4
5
6
7
8
9
10  
PDA  
PDB  
LD  
CH  
RB  
MC  
DS2  
DS1  
DS0  
PE  
F
IN  
V
SS  
NJ8821  
It is intended to be used in conjunction with a two-modulus  
prescaler such as the SP8710 series to produce a universal  
binary coded synthesiser.  
V
DD  
OSC IN  
OSC OUT  
D0  
The NJ8821 is available in Plastic DIL (DP) and Miniature  
Plastic DIL (MP) packages, both with operating temperature  
NC  
D3  
range of 230  
Ceramic DIL package with operating temperature range of  
240 C to 185 C.  
°C to 170°C. The NJ8821MA is available only in  
DP20, MP20  
DG20  
D1  
D2  
°
°
FEATURES  
Low Power Consumption  
■ Microprocessor Compatible  
Fig.1 Pin connections - top view  
■
ABSOLUTE MAXIMUM RATINGS  
Supply voltage, VDD2VSS  
Input voltage  
20·5V to 7V  
■
■
High Performance Sample and Hold Phase Detector  
>10MHz Input Frequency  
7V  
Open drain output, pin 3  
V
SS20·3V to VDD10·3V  
All other pins  
ORDERING INFORMATION  
Storage temperature  
265°C to 1150°C  
NJ8821 BA DP Plastic DIL Package  
NJ8821 BA MP Miniature Plastic DIL Package  
NJ8821 MA DG Ceramic DIL Package  
(DG package, NJ8821MA)  
255°C to 1125°C  
(DP and MP packages, NJ8821)  
Storage temperature  
DATA SELECT INPUTS  
DS0 DS1 DS2  
RB  
19  
CH  
20  
15 16 17  
TO  
INTERNAL  
LATCHES  
14  
LATCH SELECT  
LOGIC  
PROGRAM  
ENABLE (PE)  
f
REFERENCE COUNTER  
(11BITS)  
r
7
8
SAMPLE/HOLD  
PHASE  
DETECTOR  
42  
OSC IN  
1
PDA  
OSC OUT  
LATCH 6 LATCH 7 LATCH 8  
FREQUENCY/  
PHASE  
DETECTOR  
2
3
PDB  
9
D0  
10  
11  
12  
DATA  
INPUTS  
D1  
D2  
D3  
LOCK DETECT (LD)  
V
SS  
LATCH 4 LATCH 5  
LATCH 1 LATCH 2 LATCH 3  
f
4
v
‘A’ COUNTER  
(7 BITS)  
‘M’ COUNTER  
(10 BITS)  
F
IN  
6
V
DD  
MODULUS  
CONTROL  
18  
CONTROL LOGIC  
5
OUTPUT (MC)  
V
SS  
Fig.2 Block diagram  
12345

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