Da t a S h ee t , V e rs i on 1. 2 , D ec e m be r 2 00 3
P re s c a l e r C i rc u i t 2 . 1 G H z
P M B 2 31 4 T
V e r s i o n 1. 5
W i re l e s s In f r a s tr u c t ur e
N e v e r
s t o p
t h i n k i n g .
Edition 2003-12-04
Published by Infineon Technologies AG,
St.-Martin-Strasse 53,
81669 München, Germany
©
Infineon Technologies AG 2003.
All Rights Reserved.
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The information herein is given to describe certain components and shall not be considered as a guarantee of
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Terms of delivery and rights to technical change reserved.
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circuits, descriptions and charts stated herein.
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Prescaler Circuit 2.1 GHz
Revision History:
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2003-12-04
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Version 1.2
Subjects (major changes since last revision)
Updated Format
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PMB 2314T
Version 1.5
Table of Contents
1
2
3
4
5
6
7
8
9
Overview
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Pin Assignment
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Block Diagram
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Absolute Maximum Ratings
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Operating Range
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
AC/DC Characteristics
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Test Circuit
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Application Circuit
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Diagrams
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
- Definition of Modulus Set-Up Time
- Input Dynamic Range
Package Outlines
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
10
Data Sheet
<Doc_Subtype>
4
Version 1.2, 2003-12-04
PMB 2314T
Version 1.5
Overview
1
1.1
Overview – Prescalar Circuit 2.1 GHz
Functional Description/ Application
The IC is designed for use in mobile radio communication devices up to 2100 MHz and upconversion systems up
2500 MHz.
Due to low power consumption and low phase noise generation, the PMB2314T 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.
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 10 pF) 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 12. The minimum logic
swing is 0.8 V
pp
.
Table 1
Function Table
Input pin
SW
MOD
STB
Logic level
HIGH = U
S
-0.1 V to U
S
LOW = GND to 0.8 V or open
HIGH = 2.0 V to U
S
or open
LOW = GND to 0.8 V
HIGH = U
S
-0.1 V to U
S
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, 2003-12-04
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