Description
CXA1691AM/AS is a one-chip FM/AM radio IC designed for radio-cassette tape recorders.

FEATUREs
• Small number of peripheral components.
• Low current consumption (VCC=3 V)
   For FM : ID=5.8 mA (Typ.)
   For AM : ID=4.7 mA (Typ.)
• Built-in FM/AM select switch.
• Large output of AF amplifier.
   VCC=6 V, EIAJ output=450 mW (Typ.) when load impedance 8 Ω

Function
FM section
• RF amplifier, Mixer and OSC (incorporating AFC variable capacitor).
• IF amplifier
• Quadrature detection
• Tuning LED driver

AM section
• RF amplifier, Mixer and OSC (with RF AGC)
• IF amplifier (with IF AGC)
• Detector
• Tuning LED driver

AF section
• Electronic volume control
• FM muting