NJM2537_1 Datasheet, PDF (1/10 Pages) New Japan Radio – FM IF IC FOR PAGERS

NJM2537
FM IF IC FOR PAGERS
■ GENERAL DESCRIPTION
The NJM2537 is a low power FM IF IC for pagers.
It is capable of designing dual conversion pager system because
of including a mixer circuit. Also it includes RSSI function, so that it is
easy to design automatic gain control (AGC) which improves
interberence when strong signal is received.
■PACKAGE OUTLINE
NJM2537V
■ FEATURES
● Low Operating Voltage
● Low Operating Current
● RF Input Frequency
● 2nd Mixer
● Package Outline
1.1 to 4.0V
1.2mA typ.at V⁺=1.4V
10 to 50MHz
SSOP20
■ PIN FUNCTION AND BLOCK DIAGRAM
1. OSC IN
2. OSC OUT
3. MIXER OUT
4. V⁺
5. IF IN
6. DECOUPLING
7. FSK REF
8. QUAD IN
9 AF OUT
10. RSSI
11. LPF IN
12. LPF OUT
13. BS
14. CHARGE
15. FSK OUT
16. VALM
17. REG CONT
18. REG OUT
19. GND
20. MIXER IN
Ver.2003-12-09
-1-