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 reception sensitivity performance Low-power and thus energy-efficiency
Wide range of product offerings, such as receiver/transmitter ICs and receive-only ICs.

Features of the TB31372FNG and TB31373FNG

RF: 315-MHz band (TB31372FNG)/
433.92-MHz band (TB31373FNG)
I_F = 220kHz
Integrated I_F filter (BW = 300 kHz) and detector circuit
Integrated PLL/VCO (Divider: 1/32)
Fast response time thanks to a charger circuit
Small package: 24-pin SSOP
I_CC = 5.9 mA (ASK), 6.1mA (FSK): TB31372FNG
I_CC = 6.4mA (ASK), 6.6mA (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).

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

RF IC Lineup

Part Number	Functions Availability			Frequency(Hz)		FSK	ASK	Package	Status
Part Number	TX	RX	Local	RF	I_F	FSK	ASK	Package	Status
TA31273FNG		Y	X8 LO	315M/ 434M	10.7M		Y	SSOP20	MP
TA31275FNG		Y	X8 LO	315M/ 434M	10.7M	Y	Y	SSOP24	MP
TB31370FNG		Y	VCO +PLL	315M	220k (built in)	Y	Y	SSOP24	MP
TB31371FNG		Y	VCO +PLL	434M	220k (built in)	Y	Y	SSOP24	MP
TB31372FNG		Y	VCO +PLL	315M	220k (built in)	Y	Y	SSOP24	MP
TB31373FNG		Y	VCO +PLL	434M	220k (built in)	Y	Y	SSOP24	MP
TA32305FNG	Y	Y	X8 LO	315M/ 434M	80k (built in)	Y	Y	SSOP30	MP
TC32306FTG	Y	Y	VCO +PLL	315M to 915M	200k (built in)	Y	Y	QFN36	Under development

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