RF Devices

RF devices are commonly used in a remote keyless entry (RKE) system, which allows one to remotely lock and unlock automobile doors. RF devices are also used to receive information from a tire pressure monitoring system (TPMS) for display on the instrument cluster. This helps further improve automobile safety.

Remote Keyless Entry System

This is the block diagram of the Remote Keyless Entry System.

RF IC Series

Toshiba offers a suite of wireless ICs for reception and transmission using an RF frequency.

Provides industry-leading receiver sensitivity performance. Low-power and thus energy-efficiency
Wide range of product offerings, such as transceiver ICs and receive-only ICs.

Features of Toshiba’s RF ICs

Receiver ICs (TB31372FNG/TB31373FNG)

RF: 315-MHz band (TB31372FNG)/
434-MHz band (TB31373FNG)
IF = 220 kHz
On-chip IF filter (BW = 300 kHz) and detector circuit
On-chip PLL/VCO (Divider: 1/32)
Fast response time thanks to a charger circuit
Small package: 24-pin SSOP
I_CC = 5.9 mA (ASK), 6.1 mA (FSK): TB31372FNG
I_CC = 6.4 mA (ASK), 6.6 mA (FSK): TB31373FNG
Operating voltage range: 3.6 to 5.5 V
High sensitivity (12-dB SINAD): -115 dBm
(FSK mode/dev = ±40 kHz)

This is the block diagram of the RF-IC(TB31372FNG/TB31373FNG).

Block Diagram of the RF-IC (TB31372FNG/TB31373FNG)

Transceiver IC (TC32306FTG)

Operating supply voltage range: 2.0 to 5.5 V
Current consumption: When Vdd = 3.0 V (FSK modulation)
Receive mode: 9.7 mA
Transmit mode: 12 mA (at +10 dBm output)
BS mode: 0 µA
TX output: 0 dBm, +5 dBm, +8 dBm, +10 dBm (Adjustable in steps of approx. 0.5 dB)
High receiver sensitivity (12-dB SINAD) -117 dBm@IFBW = 270 kHz 【FSK, Data Rate = 600 Hz, fdev = ±40 kHz】
Multi-band operation: 315 MHz / 434 MHz / 868 MHz / 915 MHz
Data rate (TX / RX) = 300 Hz to 10 kHz, on-chip digital bit rate filter
Multi-channel (Fractional-N PLL, 5-kHz frequency step width)
Transmitter modulation: FSK, OOK (ASK)
IF filter bandwidth selection: BW = 270 kHz / 320 kHz, IF = 280 kHz / 230 kHz
Auto signal detectors: Preamble decoder, noise detector, RSSI comparator
Fast response (on-chip digital high-speed comparator)
Serial control: Read/Write mode, 4-wire serial interface (SPI)

This is the Block Diagram of the Transceiver IC (TC32306FTG)

Block Diagram of the Transceiver IC (TC32306FTG)

RF IC Lineup

Part Number	Functions Availability			Frequency(Hz)		FSK	ASK	Package	Status
Part Number	TX	RX	Local	RF	IF	FSK	ASK	Package	Status
TA31273FNG(*)		Y	X8 LO	315 M/ 434 M	10.7 M		Y	SSOP20	MP
TA31275FNG(*)		Y	X8 LO	315 M/ 434 M	10.7 M	Y	Y	SSOP24	MP
TB31370FNG		Y	VCO +PLL	315 M	220 k (on-chip)	Y	Y	SSOP24	MP
TB31371FNG		Y	VCO +PLL	434 M	220 k (on-chip)	Y	Y	SSOP24	MP
TB31372FNG		Y	VCO +PLL	315 M	220 k (on-chip)	Y	Y	SSOP24	MP
TB31373FNG		Y	VCO +PLL	434 M	220 k (on-chip)	Y	Y	SSOP24	MP
TA32305FNG(*)	Y	Y	X8 LO	315 M/ 434 M	80 k (on-chip)	Y	Y	SSOP30	MP
TC32306FTG	Y	Y	VCO +PLL	315 M to 915 M	230 k/280 k (on-chip)	Y	Y	QFN36	D
TB32302FG(*)	Y	Y	VCO +PLL	426 M / 429 M	1st: 21.7 M 2nd: 455 k	Y	Y	QFP52	MP

MP: Mass production / D: Under development
*: Intended for consumer applications. Contact Toshiba if you want to use this device for automotive applications.

* Bluetooth® is owned by Bluetooth SIG, Inc. and licensed to Toshiba Corporation.

* System and product names mentioned herein may be trademarks or registered trademarks of respective companies or organizations.