MC44864 |
RFQ for MC44864 Required Field |
 |
| Product | Manufacturers | Pack | D/C |
| MC44864 | - | N/A | N/A |
The MC44864 is a tuning circuit for TV applications. This device contains a PLL section and a DAC section and is MCU controlled through an I2C Bus.
The PLL section contains all the functions required to control the VCO of a TV tuner. The IC generates the tuning voltage and the additional control signals, such as band switching voltages.
The D/A section generates three additional varactor voltages to feed all of the varactors of the tuner with individually optimized control voltages (automatic tuner adjustment). The MC44864 is manufactured on a single silicon chip using Motorola's high density bipolar process, MOSIACETM (Motorola Oxide SelfAligned Implanted Circuits).
Features |
| • Complete Single Chip System for MPU Control• Selectable ÷8 Prescaler Accepts Frequencies up to 1.3 GHz• 15 Bit Programmable Divider Accepts Input Frequencies up to 165 MHz• Programmable Reference Divider• 3State Phase/Frequency Comparator• Operational Amplifier for Direct Varactor Control with Low Saturation Voltage• Four Output Buffers (15 mA)• Output Options for 62.5 kHz, Reference Frequency and the Programmable Divider• The HF Input is Symmetrical• Three 6 Bit DACs for Automatic Tuner Adjustment Allowing Use of NonMatched Varactors• Better Tuner Performances Through Optimum Filter Response• I2C Bus Controlled• Four Chip Addresses for the PLL Section• Four Chip Addresses for the D/A Section• ESD Protected to MILSTD883C, Method 3015.7 (2,000 V, 1.5 k, 150 pF) |
|
Rating |
Pin |
Value |
Unit |
| Power Supply Voltage (VCC1) |
9 |
6.0 |
V |
| Band Buffer "Off" Voltage |
14 17 |
15 |
V |
| Band Buffer "On" Current |
14 17 |
20 |
mA |
| Operational Amplifier Power Supply Voltage (VCC2) |
4 |
36 |
V |
| Operational Amplifier Short Circuit Duration (0 to VCC2) |
5 8 |
Continuous |
S |
| Storage Temperature |
- |
65 to +150 |
|
| Operating Temperature Range |
- |
0 to +70 |
