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TMS3705A

The Texas Instruments TMS3705A is an LF Base Station IC designed for handheld RFID readers and vehicle immobilizers. It operates efficiently within the 129 kHz – 140 kHz frequency range.

✓ Total Stock: 12,053 pcs

$ Price Range: $0.99

TMS3705A Available from 1 distributor

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✓ Non-Authorised

Distributor		Stock	Pricing	MOQ	PKG	Lead Time	Date Code	On Order Quantity	On Order Delivery
Romaks Technologies ✓ Non-Authorised Inventory information	12,053 pcs On Request	12053 pcs	On Request	1	On Request	On Request	On Request	On Request	On Request

TMS3705A Specifications Quick View

Most important parameters for selection – full specs in datasheet.

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Category	New Products
Manufacturer Name	Texas Instruments
ESD Protection	-2000 V to +2000 V
Operating Temperature	-40°C to +85°C
Operating Voltage	4.5 V to 5.5 V
Storage Temperature	-40°C to +100°C

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TMS3705A Description

Short technical summary and product information.

The Texas Instruments TMS3705A is a Low Frequency (LF) Base Station Integrated Circuit (IC) designed for efficient development and production of handheld RFID readers and vehicle immobilizers. This IC drives the antenna of a TI-RFid transponder system, enabling it to send data modulated on the antenna signal and to detect and demodulate responses from the transponder.

Key functions include self-adaptation to transponders with resonance frequencies between 129 kHz and 140 kHz, support for all TI-RFid LF transponder functions, asynchronous and synchronous data transmission, power management for 5V operation, an internal full bridge antenna driver, a PLL for internal clock generation of 16 MHz, and overcurrent protection for the antenna driver. It is designed to minimize external component count.

The TMS3705A operates with a typical frequency of 134.2 kHz (FSK) and requires an operating voltage between 4.5V and 5.5V DC. It features a two-wire multifunctional serial interface for communication with a microcontroller at 15625 baud. The recommended antenna inductance is between 400µH and 700µH.

Packaged in an SO 16 (10 mm x 6 mm) surface-mount package, the TMS3705A is supplied on tape and reel with 2500 units per reel. It has an operating temperature range of -40°C to +85°C and ESD protection rated at -2000V to +2000V (MILSTD 883).

TMS3705A Quick Information

Product Type: RFID LF Base Station IC

Series: TMS3705

Canonical Name: LF Base Station IC TMS3705A

Subcategory: LF Base Station IC

TMS3705A Compliance

RoHS Status: RoHS Compliant

Moisture Sensitivity Level (MSL): 1 Unlimited

REACH Status: REACH Unaffected

TMS3705A Estimated Pricing

Qty	Low	High
1+	$0.99	$0.99

Estimated market price range - modelled values for guidance only, not live distributor offers.

TMS3705A Features

Drives TI-RFid transponder system antenna.
Self-adapts to transponders 129 kHz – 140 kHz.
Operates at typical 134.2kHz frequency.
4.5V to 5.5V DC operating voltage.
SO 16 package, tape and reel.

TMS3705A Applications

Ideal for RFID transponder reader systems.
Used in animal identification and tracking.
Suitable for access control and monitoring.
Applicable in industrial automation and logistics.

TMS3705A FAQs

7 frequently asked questions generated from this part’s specifications.

What is the operating voltage range of the TMS3705A?

4.5V to 5.5V DC.

What package is the TMS3705A available in?

SOIC-16 (10 mm x 6 mm).

What is the operating temperature range?

-40°C to +85°C.

What is the operating frequency of the TMS3705A?

134.2 kHz with FSK modulation.

What is the current consumption in sleep mode?

15 µA typical (without I/O currents).

What is the recommended antenna inductance?

400 µH to 700 µH.

What interface does the TMS3705A use to communicate with a microcontroller?

Two-wire multifunctional serial interface at 15625 baud.