PMB2313T 데이터 시트보기 (PDF) - Infineon Technologies

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PMB2313T

Prescaler Circuit 1.1 GHz

Infineon Technologies 

PMB 2313T

Version 1.5

Overview

1

Overview – Prescaler Circuit 1.1 GHz

1.1

Functional Description/ Application

This IC is designed for use in mobile radio communication devices up to 1100 MHz.

Due to low power consumption and low phase noise generation, the PMB2313T is suitable for use in battery

powered handheld systems, e.g. GSM, cordless telephones and cordless consumer products, as well as in

basestations.

Low supply voltage down to 2.7V. It can be switched to a low-power standby mode. Internal current source at the

emitter follower output.

No external resistor needed in typical applications.

The divide ratio is 1:64/65 or 1:128/129 depending on the external circuit configuration.

The IC is board level compatible to the PMB 2312 prescaler.

1.2

Circuit Description

The differential inputs of the IC may be connected either balanced or single ended. In the latter case the unused

input must be RF-grounded with a capacitor (about 1.5 nF) with a low serial inductance.

Depending on the logic level at SW input the basic divide ratio of the ECL-stages is fixed to 1:64/65 or 1:128/129.

The MOD input determines whether modulus 1:n or 1:n+1 (n=64 or 128 according to SW-level) is active.

The IC can be switched to a low-power standby mode (input STB).

The MOD input is TTL/CMOS compatible.

The emitter follower output is CMOS compatible according to the application circuit on page 11. The minimum logic

swing is 0.8 Vpp.

Table 1 Function Table

Input pin

SW

MOD

STB

Logic level

HIGH = US-0.1 V to US

LOW = GND to 0.8 V or open

HIGH = 2.0 V to US or open

LOW = GND to 0.8 V

HIGH = US-0.1 V to US

LOW = GND to 0.8 V

Prescaler function

1:64/65

1:128/129

1:64/1:128

1:65/1:129

Divider

Q=HIGH, STANDBY-mode

Data Sheet

5

Version 1.2, 2003-12-01

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