CXA1999N

CXA1999N IF Amplifier for M-ary FSK Pagers Description The CXA1999N is a low current consumption FM IF amplifier which employs the newest bipolar process. It is suitable for M-ary FSK pagers. Features Low current consumption: 1.16 mA (typ. at VCC = 1.4 V) Low voltage operation: VCC = 1.1 to 4.0 V Small package 20-pin SSOP Second mixer and oscillator Needless of IF decoupling capacitor Reference power supply for operational amplifier and comparator IF input, VCC standard Applications M-ary FSK pagers Double conversion pagers Structure Bipolar silicon monolithic IC 20 pin SSOP (Plastic) Absolute Maximum Ratings Supply voltage Operating temperature Storage temperature Allowable power dissipation Operating Condition Supply voltage VCC 7.0 V Topr –20 to +75 °C Tstg –65 to +150 °C PD 375 mW VCC1 1.1 to 4.0 V Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits. —1— E95517C8Y Block Diagram and Pin Configuration 20 REG OUT REG CONT LVA OUT NRZ OUT CHARGE LEVEL COMPARATOR L.C. OUT 19 18 17 16 15 14 13 12 LPF OUT 11 LPF IN MIX IN GND MIXER REGULATOR ALARM NRZ COMPARATOR QUICK CHARGE —2— IF LIM MIX OUT VCC IF...