TMS37157
Passive Low Frequency Interface Device (PaLFI) With EEPROM and 134.2 kHz Transponder Interface
TMS37157
- Wide Supply Voltage Range 2 V to 3.6 V
- Ultra Low Power Consumption
- Active Mode Max. 150 µA
- Power Down Mode 60 nA
- 121 Free Bytes User Memory
- Low Frequency Halb Duplex (HDX) Interface
- HDX Transponder Communication Achieving Maximum
Perfomance and Highest Noise Immunity - Special Selective Addressing Mode Allows
Anti Collision - Up to 8 kbit/s LF Uplink Data Rate
- 126 Byte EEPROM:
- 121 Bytes Free Available EEPROM User Memory
- 32 Bit Unique Serial Number
- 8 Bit Selective Address
- High EEPROM Flexibility
- Pages are Irreversible Lockable and Protectable
- Battery Check and Battery Charge Function
- Resonance Frequency: 134.2 kHz
- Integrated Resonance Frequency Trimming
- Downlink – Amplitude Shift Keying
- Uplink – Frequency Shift Keying
- HDX Transponder Communication Achieving Maximum
- 3 Wire SPI Interface for Accessing the EEPROM and
Exchanging Data With the Microcontroller Through
the LF Interface - 0.6mm Pitch, 4mm x 4mm VQFN Package
- APPLICATIONS
- Wireless Batteryless Sensor Interface using
Energy Harvesting- Microcontroller and Sensor can be Powered Through the
LF Link - Data is Directly Transmitted Over the LF Link From the
Base Station via the TMS37157 to the Micrcontroller and Vice
Versa.
- Microcontroller and Sensor can be Powered Through the
- Batteryless Configuration Memory
- Memory can be Written Without Battery Support
- Microcontroller can Read the Content of the Memory When
It Gets Connected to a Battery and Use It for Configuration - Microcontroller can Write the Memory, Which can be Read Out
Later Through the LF Link
- Ultra Low Power Data Logger Memory (Smart Metering)
- Memory Can Be Written By a Microcontroller
- Memory Can Be Read Through LF Interface Without
Battery Support
- Multi Purpose LF Interface to a Microcontroller
- Short Range RF Interface to a Microcontroller Where
Other Frequencies are Not an Option - Ultra Low Power Mode can Result in an
Overall Power Consumption of 60 nA
- Short Range RF Interface to a Microcontroller Where
- Remote Control Application
- Combination With an UHF Transmitter or IR Transmitter and a µC
- Power Management of the TMS37157 can Power Down
the Microcontroller - The Push Button Detection Circuit can Power Up a
Microcontroller
- Stand Alone LF-Transponder with Memory
- RFID Transponder with Unique ID and 121
Bytes Free Programmable EEPROM User Memory - Only Few Additional Components Needed
- No Battery Required
- RFID Transponder with Unique ID and 121
- Wireless Batteryless Sensor Interface using
The TMS37157 combines a Low Frequency Transponder Interface with an SPI Interface and Power Management for a connected microcontroller. It is the ideal device for any Configuration, Data Logger-, Sensoror Remote Control Application. The Transponder memory is accessible through SPI and LF and, in the second case, operates without the need for a battery. The use of the Low Frequency Band ensures a communication in a defined direction and harsh environments.
The TMS37157 manages the Transponder communication and push button interaction. During sleep state the devices enters a special low power mode with only 60 nA current consumption.
The EEPROM memory is accessible over the LF interface without support from the battery or through SPI by a microcontroller if a battery is connected. The TMS37157 offers a special battery charge mode.
The external resonance circuit with a LF coil and a resonance capacitor can be trimmed to the correct resonance frequency with the integrated trimming capability achieving an easy way to eliminate part tolerances.
The small RSA 16-pin package together with only a few external components results in a cost efficient design.
Limited design support from TI available
Existing projects using this product have limited design support from TI. If available, you will find relevant collateral, tools and software on this page. Existing designs using this product have limited design support from TI. Request limited design support in the TI E2E™ support forums.
Technical documentation
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | Passive Low Frequency Interface Device With EEPROM and 134.2 kHz Transponder datasheet (Rev. A) | 05 Nov 2009 | |
| Application note | TMS37157 Passive Low-Frequency Interface IC Performance With Neosid Antennas (Rev. A) | 19 Apr 2013 | ||
| Application note | Low-Power Battery-Less Wireless Temperature and Humidity Sensor for TMS37157 | 19 Dec 2011 | ||
| Application note | Using the SPI Library for TMS37157 | 19 Dec 2011 | ||
| Application note | Communicating With the RFID Base Station | 21 Sep 2011 | ||
| Application note | Low-Frequency RFID in a Nutshell | 21 Sep 2011 | ||
| Application note | LF HDX System Parameter Calculation for TMS37157 (PaLFI) | 15 Jul 2010 | ||
| More literature | eZ430-TMS37157 Development Tool FAQ (Rev. A) | 15 Mar 2010 | ||
| Product overview | MSP430 Ultra-Low-Power MCUs and TI-RFid Devices | 03 Apr 2009 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| VQFN (RSA) | 16 | Ultra Librarian |
Ordering & quality
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- Ongoing reliability monitoring
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- Assembly location
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