ECG1253, PLL Frequency Synthesizer IC for CB Radio ~ 22 Pin DIP (NTE1253, KM5624)

FEATURES:

• ECG1253, PLL Frequency Synthesizer IC for CB Radio
• High speed operation with low power consumption
• Open drain INMOS) Included for the lowpass fitter – the dynamic range of the VCO is Increased using a HV supply separate from the logic section
• Buffer terminal provided for the reference (10.24 MHz) oscillator
• Detection circuit for misprogramming and the unlock period (stopping the Tx output)
• Programmable Input, (PI), and -divider Input, (IT), have AC amplifiers, and will operate at 100 mV, 4 mW Input
• Program Input terminals, P1 … P6, have pull down resistors and pull-up resistors provided at the Tx/Rx termlnals
• Reference oscillator circuit: 10.24 MHz w/external crystal
• 11 bit divider, 10 bit and 11 bit w/changeover switch
• Programmable divider: BCD channel code
• Phase detector, CP
• Code converter for Tx/Rx changeover
• 1/2-divider for SSB
• This is a CMOS LSI, PLL frequency synthesizer that has been designed for use In 40 channel CB transceivers,
• Package/Case: 22 Pin DIP
• Replaces: NTE1253, KM5624