ECG1254, CB Radio PLL Frequency Synthesizer IC ~ 24 Pin DIP (NTE1254, UDP861C)

ECG1254, CB Radio PLL Frequency Synthesizer IC ~ 24 Pin DIP Replaces NTE1254, SK3880, UDP861C & MPD861C

This device is designed for use in frequency synthesizers and phase locked loop applications for CB transceivers.

FEATURES:

• ECG1254, CB Radio PLL Frequency Synthesizer IC
• PLL (Phase Lock Loop) Frequency Synthesizer IC For CB Radio Applications
• Programmable Divider – Divided by 3 to 255
• 10-Bit Divider
• Phase Detector
• Reference Oscillation Circuit
• On-Chip Filter Amplifier
• Code Converter
• Only two or three crystals required for CB radio AM frequency selection
• Unlocked signals are detected at instant stop IS terminal
• Two type program mode can be selected to change input mode level
  M: Low level . Binary code input enables, divided by 3 to 255
  M: High level . BCD code enables that the data at P1 to P6 port is offset 90 by code converter
• Internal active filter amplifier has a long holding time due to very high input impedance characteristicsof the CMOS-this is to obtain very good spurious response.
• Output signal of the I can be used to stop the spurious radiation when the channel selectormakes misprogramming such as rotary switchs lose contact.
• High speed and low power consumption due to CMOS
• Single power supply and fully TTL compatible: VDD = 5 0.5 Volts
• Operating Temperature: TA = -30 to 65C
• Pull down resistors installed in program and mode switch inputs
• Package/Case: 24 Pin DIP
• Replaces: NTE1254, SK3880, UDP861C & MPD861C