DESCRIPTION
The SA637 is a low-voltage high performance monolithic digital system with high-speed RSSI incorporating a mixer, oscillator with buffered output, two limiting intermediate frequency amplifiers, fast logarithmic
received signal strength indicator (RSSI), voltage regulator, RSSI op amp and power down pin. The SA637 is available in SSOP (shrink small outline package).

FEATURES
•VCC= 2.7 to 5.5V
•Low power receiver (3.8mA @ 3V)
•Power down mode (ICC= 110µA)
•Fast RSSI rise and fall times
•Extended RSSI range with temperature compensation
•RSSI op amp
•2MHz limiter small signal bandwidth
•455kHz filter matching (1.5kΩ)
•Differential limiter output
•Oscillator buffer
•SSOP-20 package

APPLICATIONS
•ADC (American Digital Cellular)
•Digital receiver systems
•Cellular radio