Details, datasheet, quote on part number: MC44829
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Features, Applications

The is a tuning circuit for TV and VCR tuner applications. It contains, on one chip, all the functions required for PLL control of a VCO. This integrated circuit also contains a high frequency prescaler and thus can handle frequencies to 1.3 GHz. The circuit has a band decoder that provides the band switching signal for the mixer/oscillator circuit. The decoder is controlled by the buffer bits. The MC44829 has programmable 512/1024 reference dividers and is manufactured on a single silicon chip using Motorola's high density bipolar process, MOSAICTM (Motorola Oxide Self Aligned Implanted Circuits).


Complete Single Chip System for MPU Control (I2C Bus) Divide­by­8 Prescaler Accepts Frequencies to 1.3 GHz 15 Bit Programmable Divider Reference Divider: Programmable for Division Ratios 512 and 1024 3­State Phase/Frequency Comparator Operational Amplifier for Direct Tuning Voltage Output (30 V) Four Programmable Chip Addresses Integrated Band Decoder for the Mixer/Oscillator Circuit Band Buffers with Low "On" Voltage (0.4 V Maximum at 5.0 mA) Fully ESD Protected to MIL­STD­883C, Method k, 150 pF)

Rating Power Supply Voltage (VCC1) Band Buffer "Off" Voltage Band Buffer "On" Current Operational Amplifier Power Supply (VCC2) RF Input Level 10 MHz to 1.3 GHz Storage Temperature Operating Temperature Range Bus Input Voltage (Positive) Bus Input Voltage (Negative) Pin Value 7.0 ­0.5 Unit mA V Vrms °C V

RL Bands Out V 5 DEC 12 Mixer/Oscillator Band Decoder Fout Fref Test Logic DTB1 V Operational Amplifier Latches T10, T11 P­On Reset DTB2 POR CA SDA SCL 10 I2C Bus Receiver CL Data RL DTF 3 Shift Register 15 Bit 7 512/1024 Latches Fout Fref Phase Comp PHO CL

Preamp ÷8 Prescaler Program Divider 15 Bit Fout Latch Control

Characteristic VCC1 Supply Voltage Range VCC1 Supply Current 5.0 V) Band Buffer Leakage Current when "Off" 12 V Band Buffer Saturation Voltage when "On" 5.0 mA Data/Clock Current 0 V (Acknowledge "Off") Data/Clock Current 5.0 V (Acknowledge "Off") Data/Clock Input Voltage Low Data/Clock Input Voltage High Data Saturation Voltage 3.0 mA (Acknowledge "On") Decoder "High" Level Sourcing 100 µA Decoder "Medium" Level Sourcing 15 µA Decoder "Low" Level Sinking 20 µA Clock Frequency Range Oscillator Frequency Range Operational Amplifier Internal Reference Voltage Operational Amplifier Input Current DC Open Loop Gain (RL 22 k) Gain Bandwidth Product (CL = 0.5 nF) Vout Low (RL 22 k) Phase Detector Tri­State Current Charge Pump Current of Phase Comparator = 0) Charge Pump Current of Phase Comparator 1) VCC2 Supply Voltage Range Pin Min Typ Max VCC1 Unit V µA kHz MHz V nA V/V MHz µA V

Pin Function VTUN/VCC2 Gnd B6 CA SCL SDA DEC Xtal PHO Description Output of the tuning voltage amplifier. Needs an external pull­up resistor to drive the varicaps Ground Symmetric HF inputs from local oscillator Supply voltage. Typical 5.0 V Band buffer outputs Chip address selection pin Clock input of the I2C bus Data input Band decoder output for the mixer/oscillator circuit Crystal input Input of tuning voltage amplifier


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