Rev. 3.5

RI-RFM-006A

Page 3 of 19

! Overview

RI-RFM-006A is a CMOS-technology based RF-module IC which integrates all transmitter-receiver

functions required for constructing a TIRIS Read-Write System into one single chip.

RI-RFM-006A consists of a transmitter signal control logic which generates signals for power

transmission and for sending the data you wrote to a remote TIRIS transponder, and a receiver which

amplifies and demodulates frequency shift keyed (FSK) signals received from this transponder.

Therefore, RI-RFM-006A is beneficially usable for constructing, in particular, a compact TIRIS Read-

Write System at a reduced cost. Furthermore, demodulation of the FSK signals received in its receiver

from a remote transponder is entirely digitized; this completely eliminates the need of regulations and

lessens the number of required external parts, thus enhancing the operational reliability of the system.

! Features

The TIRIS RF-Module IC for Automotive Application, RI-RFM-006A, provides the following features

amongst others:

• It incorporates a transmitter circuit with power selector and an open drain transmission power pre-

driver.

• Also incorporated are a receiver signal amplifier and a digitized FSK signal demodulator.

• I/O specifications: Conform to TIRIS standard RF-module specifications, with available signals of

TXCT-, RXDT-(*) and RXCK only.

(*) For RXDT- signals, this RF-module has a reverse polarity in relation to TIRIS standard

RF-modules. See the section “Description of Pins” for more information.

• Operating supply voltage: 4.5 V to 5.5 V

• Operating temperature range: -40 °C to +85 °C

• Package: 16-pin SO package

• Structure: CMOS process

! TIRIS System Configuration (Schematic Diagram)

TIRIS transponder

Controller

Serial

transmission

TIRIS RF-module

RI45538NS

TIRIS Read-Write System

Transmitter-receiver

Antenna

FSK

ASK

TIRIS System Configuration