U2781B Datasheet Frequency Synthesizer

Manufacturer: Atmel (now Microchip Technology)

Overview: U2781B Frequency Synthesizer.

Datasheet Details

Part number	U2781B
Manufacturer	Atmel (now Microchip Technology)
File Size	82.00 KB
Description	Frequency Synthesizer
Datasheet	U2781B_Atmel.pdf

General Description

The programmable frequency synthesizer IC U2781B for µP-controlled applications is realized with Atmel Wireless & Microcontrollers’ advanced UHF process which is very suitable for combinations of fast ECL logic and low-current I2L logic.

The benefits are high input sensitivity combined with low power consumption and therefore small packages (SSO20).

This makes the device a perfect choice for cordless phones and handheld cellular radio sets up to 1.1 GHz.

Key Features

D D D D D D D D D Very low current consumption (typ. 3 V/ 5 mA) Supply-voltage range: 2.7 to 5.5 V Max. input frequency: 1.1 GHz Programmable prescaler 64/ 65 or 128/ 129 Controlled by 3-wire bus with fclock up to 500 kHz Status output for PLL lock/ unlock condition Very fast phase detector SSO20 package ESD protection in accordance with MIL-STD. 883 method 3015 class 2 Benefits D Very low current consumption extends talk time D Few external components and SSO package save costs and space Bloc.

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