Obsolescence Notice
This product is obsolete. This information is available for your convenience only. For more informa...
Obsolescence Notice
This product is obsolete. This information is available for your convenience only. For more information on Zarlink’s obsolete products and replacement product lists, please visit
http://products.zarlink.com/obsolete_products/
THIS DOCUMENT IS FOR MAINTENANCE PURPOSES ONLY AND IS NOT RECOMMENDED FOR NEW DESIGNS
NJ8820
DS3277-1.2
NJ8820
FREQUENCY SYNTHESISER (PROM INTERFACE)
The NJ8820 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 read from an external memory, with the necessary timing signals generated internally. 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 NJ8820 is available in Plastic DIL (DP) and Miniature Plastic DIL (MP) packages, both with operating temperature range of 230°C to 170°C. The NJ8820MA is available only in Ceramic DIL package with operating temperature range of 240°C to 185°C.
PDA PDB LD FIN VSS VDD OSC IN OSC OUT D0 D1 1 2 3 4 5 20 19 18 17 16 CH RB MC DS2 DS1 DS0 PE ME D3 D2
NJ8820
6 7 8 9 10 15 14 13 12 11
DP20, MP20, DG20
FEATUR...