This data sheet introduces the technical information of MC145181 dual frequency synthesizer, including functions, features, application scenarios, etc.
The MC145181 is a dual‑frequency synthesizer that operates up to 550 MHz on the main loop and 60 MHz on the secondary loop. It integrates two 8‑bit DACs, a voltage multiplier for the phase/frequency detectors, and multiple low‑power standby modes, making it suitable for ReFLEX two‑way paging applications and transmit carrier generation.
The device is supplied in an LQFP‑32 plastic package (case 873C) and supports a supply voltage range of 1.8 V to 3.6 V. Detailed electrical characteristics, pin connections, and dynamic timing parameters are provided for system designers, along with recommended development hardware (MC145230EVK).
| Main Loop Operating Frequency | 100 to 550 MHz |
|---|---|
| Secondary Loop Operating Frequency | 10 to 60 MHz |
| Supply Voltage Range | 1.8 V to 3.6 V |
| Nominal Supply Current (both loops active) | 3 mA |
| DAC Supply Range | 1.8 V to 3.6 V |
| Package Type | LQFP‑32 (5 mm × 5 mm) |
The main loop can operate from 100 MHz up to 550 MHz.
It operates with a supply voltage between 1.8 V and 3.6 V.
The device includes two independent 8‑bit DACs.
It is supplied in an LQFP‑32 plastic package measuring 5 mm × 5 mm.