TMS37157 Series

Passive Low Frequency Interface Device (PaLFI) With EEPROM and 134.2 kHz Transponder Interface

Catalog

Passive Low Frequency Interface Device (PaLFI) With EEPROM and 134.2 kHz Transponder Interface

Part	Supplier Device Package	Voltage - Supply [Max]	Voltage - Supply [Min]	Operating Temperature [Max]	Operating Temperature [Min]	Mounting Type	Interface	Type	Package / Case	Frequency
Texas Instruments TMS37157IRSARG4	16-QFN (4x4)	3.6 V	2 V	85 °C	-40 °C	Surface Mount	SPI	RFID Transponder	16-VQFN Exposed Pad	134.2 kHz

Catalog

Passive Low Frequency Interface Device (PaLFI) With EEPROM and 134.2 kHz Transponder Interface

Key Features

• Wide Supply Voltage Range 2 V to 3.6 VUltra Low Power ConsumptionActive Mode Max. 150 µAPower Down Mode 60 nA121 Free Bytes User MemoryLow Frequency Halb Duplex (HDX) InterfaceHDX Transponder Communication Achieving MaximumPerfomance and Highest Noise ImmunitySpecial Selective Addressing Mode AllowsAnti CollisionUp to 8 kbit/s LF Uplink Data Rate126 Byte EEPROM:121 Bytes Free Available EEPROM User Memory32 Bit Unique Serial Number8 Bit Selective AddressHigh EEPROM FlexibilityPages are Irreversible Lockable and ProtectableBattery Check and Battery Charge FunctionResonance Frequency: 134.2 kHzIntegrated Resonance Frequency TrimmingDownlink – Amplitude Shift KeyingUplink – Frequency Shift Keying3 Wire SPI Interface for Accessing the EEPROM andExchanging Data With the Microcontroller Throughthe LF Interface0.6mm Pitch, 4mm x 4mm VQFN PackageAPPLICATIONSWireless Batteryless Sensor Interface usingEnergy HarvestingMicrocontroller and Sensor can be Powered Through theLF LinkData is Directly Transmitted Over the LF Link From theBase Station via the TMS37157 to the Micrcontroller and ViceVersa.Batteryless Configuration MemoryMemory can be Written Without Battery SupportMicrocontroller can Read the Content of the Memory WhenIt Gets Connected to a Battery and Use It for ConfigurationMicrocontroller can Write the Memory, Which can be Read OutLater Through the LF LinkUltra Low Power Data Logger Memory (Smart Metering)Memory Can Be Written By a MicrocontrollerMemory Can Be Read Through LF Interface WithoutBattery SupportMulti Purpose LF Interface to a MicrocontrollerShort Range RF Interface to a Microcontroller WhereOther Frequencies are Not an OptionUltra Low Power Mode can Result in anOverall Power Consumption of 60 nARemote Control ApplicationCombination With an UHF Transmitter or IR Transmitter and a µCPower Management of the TMS37157 can Power Downthe MicrocontrollerThe Push Button Detection Circuit can Power Up aMicrocontrollerStand Alone LF-Transponder with MemoryRFID Transponder with Unique ID and 121Bytes Free Programmable EEPROM User MemoryOnly Few Additional Components NeededNo Battery RequiredWide Supply Voltage Range 2 V to 3.6 VUltra Low Power ConsumptionActive Mode Max. 150 µAPower Down Mode 60 nA121 Free Bytes User MemoryLow Frequency Halb Duplex (HDX) InterfaceHDX Transponder Communication Achieving MaximumPerfomance and Highest Noise ImmunitySpecial Selective Addressing Mode AllowsAnti CollisionUp to 8 kbit/s LF Uplink Data Rate126 Byte EEPROM:121 Bytes Free Available EEPROM User Memory32 Bit Unique Serial Number8 Bit Selective AddressHigh EEPROM FlexibilityPages are Irreversible Lockable and ProtectableBattery Check and Battery Charge FunctionResonance Frequency: 134.2 kHzIntegrated Resonance Frequency TrimmingDownlink – Amplitude Shift KeyingUplink – Frequency Shift Keying3 Wire SPI Interface for Accessing the EEPROM andExchanging Data With the Microcontroller Throughthe LF Interface0.6mm Pitch, 4mm x 4mm VQFN PackageAPPLICATIONSWireless Batteryless Sensor Interface usingEnergy HarvestingMicrocontroller and Sensor can be Powered Through theLF LinkData is Directly Transmitted Over the LF Link From theBase Station via the TMS37157 to the Micrcontroller and ViceVersa.Batteryless Configuration MemoryMemory can be Written Without Battery SupportMicrocontroller can Read the Content of the Memory WhenIt Gets Connected to a Battery and Use It for ConfigurationMicrocontroller can Write the Memory, Which can be Read OutLater Through the LF LinkUltra Low Power Data Logger Memory (Smart Metering)Memory Can Be Written By a MicrocontrollerMemory Can Be Read Through LF Interface WithoutBattery SupportMulti Purpose LF Interface to a MicrocontrollerShort Range RF Interface to a Microcontroller WhereOther Frequencies are Not an OptionUltra Low Power Mode can Result in anOverall Power Consumption of 60 nARemote Control ApplicationCombination With an UHF Transmitter or IR Transmitter and a µCPower Management of the TMS37157 can Power Downthe MicrocontrollerThe Push Button Detection Circuit can Power Up aMicrocontrollerStand Alone LF-Transponder with MemoryRFID Transponder with Unique ID and 121Bytes Free Programmable EEPROM User MemoryOnly Few Additional Components NeededNo Battery Required

Description

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. 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.