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PDF NJ8821 Data sheet ( Hoja de datos )
| Número de pieza | NJ8821 | |
| Descripción | FREQUENCY SYNTHESISER | |
| Fabricantes | General Electric Company | |
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NJ8821
NJ8821
DS3278-1.3
FREQUENCY SYNTHESISER (MICROPROCESSOR INTERFACE)
WITH RESETTABLE COUNTERS
The 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-hold comparators, 10-bit programmable ‘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..
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.
The NJ8821 is available in Plastic DIL (DP) and Miniature
Plastic DIL (MP) packages, both with operating temperature
range of 230°C to 170°C. The NJ8821MA is available only in
Ceramic DIL package with operating temperature range of
240°C to 185°C.
FEATURES
s Low Power Consumption
s Microprocessor Compatible
s High Performance Sample and Hold Phase Detector
s >10MHz Input Frequency
ORDERING INFORMATION
NJ8821 BA DP Plastic DIL Package
NJ8821 BA MP Miniature Plastic DIL Package
NJ8821 MA DG Ceramic DIL Package
PDA 1
20 CH
PDB 2
19 RB
LD 3
18 MC
FIN 4
17 DS2
VSS 5
16 DS1
NJ8821
VDD 6
15 DS0
OSC IN 7
14 PE
OSC OUT 8
13 NC
D0 9
D1 10
12 D3
11 D2
DP20, MP20
DG20
Fig.1 Pin connections - top view
ABSOLUTE MAXIMUM RATINGS
Supply voltage, VDD2VSS
Input voltage
20·5V to 7V
Open drain output, pin 3
7V
All other pins
Storage temperature
VSS20·3V to VDD10·3V
265°C to 1150°C
(DG package, NJ8821MA)
Storage temperature
255°C to 1125°C
(DP and MP packages, NJ8821)
PROGRAM 14
ENABLE (PE)
OSC IN 7
OSC OUT 8
DATA
INPUTS
D0
D1
D2
D3
9
10
11
12
FIN 4
VDD 6
VSS 5
LATCH SELECT
LOGIC
DATA SELECT INPUTS
DS0 DS1 DS2
15 16 17
TO
INTERNAL
LATCHES
REFERENCE COUNTER
(11BITS)
42 fr
LATCH 6 LATCH 7 LATCH 8
LATCH 4 LATCH 5
‘A’ COUNTER
(7 BITS)
LATCH 1 LATCH 2 LATCH 3
‘M’ COUNTER
(10 BITS)
fv
CONTROL LOGIC
Fig.2 Block diagram
RB CH
19 20
SAMPLE/HOLD
PHASE
DETECTOR
1 PDA
FREQUENCY/
PHASE
DETECTOR
2 PDB
3 LOCK DETECT (LD)
VSS
18
MODULUS
CONTROL
OUTPUT (MC)
1 page  
NJ8821
HEADQUARTERS OPERATIONS
GEC PLESSEY SEMICONDUCTORS
Cheney Manor, Swindon,
Wiltshire SN2 2QW, United Kingdom.
Tel: (0793) 518000
Fax: (0793) 518411
GEC PLESSEY SEMICONDUCTORS
P.O. Box 660017
1500 Green Hills Road,
Scotts Valley, California 95067-0017,
United States of America.
Tel: (408) 438 2900
Fax: (408) 438 5576
CUSTOMER SERVICE CENTRES
• FRANCE & BENELUX Les Ulis Cedex Tel: (1) 64 46 23 45 Fax : (1) 64 46 06 07
• GERMANY Munich Tel: (089) 3609 06-0 Fax : (089) 3609 06-55
• ITALY Milan Tel: (02) 66040867 Fax: (02) 66040993
• JAPAN Tokyo Tel: (03) 5276-5501 Fax: (03) 5276-5510
• NORTH AMERICA Scotts Valley, USA Tel (408) 438 2900 Fax: (408) 438 7023.
• SOUTH EAST ASIA Singapore Tel: (65) 3827708 Fax: (65) 3828872
• SWEDEN Stockholm, Tel: 46 8 702 97 70 Fax: 46 8 640 47 36
• TAIWAN, ROC Taipei Tel: 886 2 5461260. Fax: 886 2 71900260
• UK, EIRE, DENMARK, FINLAND & NORWAY
Swindon Tel: (0793) 518510 Fax : (0793) 518582
These are supported by Agents and Distributors in major countries world-wide.
© GEC Plessey Semiconductors 1992
This publication is issued to provide information only which (unless agreed by the Company in writing) may not be used, applied or reproduced for any purpose nor form part of any order or contract nor to be regarded
as a representation relating to the products or services concerned. No warranty or guarantee express or implied is made regarding the capability, performance or suitability of any product or service. The Company
reserves the right to alter without prior knowledge the specification, design or price of any product or service. Information concerning possible methods of use is provided as a guide only and does not constitute
any guarantee that such methods of use will be satisfactory in a specific piece of equipment. It is the user's responsibility to fully determine the performance and suitability of any equipment using such information
and to ensure that any publication or data used is up to date and has not been superseded. These products are not suitable for use in any medical products whose failure to perform may result in significant injury
or death to the user. All products and materials are sold and services provided subject to the Company's conditions of sale, which are available on request.
5 Page | ||
| Páginas | Total 5 Páginas | |
| PDF Descargar | [ Datasheet NJ8821.PDF ] | |
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