TMS37126 Datasheet, PDF (1/10 Pages) Texas Instruments – REMOTE ACCESS IDENTIFICATION DEVICEWITH INTEGRATED 3D WAKEUP RECEIVER AND IMMOBILIZER INTERFACE

TMS37126
www.ti.com
SCBS880 – MAY 2012
REMOTE ACCESS IDENTIFICATION DEVICE
WITH INTEGRATED 3D WAKEUP RECEIVER AND IMMOBILIZER INTERFACE
Check for Samples: TMS37126
FEATURES
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• Low-Frequency (LF) Immobilizer Interface
– Integrated Batteryless Immobilizer Interface
– Half Duplex (HDX) Immobilizer
Communication Achieves up to 4 inch (10
cm) Read Range
– Special Selective Addressing Mode Allows
Reliable Learn-In Sequence
– 80-Bit Authentication Key Length
– 80-Bit DST80 Security Authentication
Coprocessor
– Up to 8-kbit/s Uplink Data Rate
– 5-/3-Byte Challenge/Response Algorithm
– Fast Authentication Within 42 ms
– Fast Mutual Authentication Within 65 ms
– 133-Byte EEPROM
– 91-Byte Available EEPROM User
Memory
– 32-Bit Unique Serial Number
– High EEPROM Security and Flexibility
– Write-Only Authentication Keys
– Pages Are Irreversibly Lockable and
Protectable
– Protected Pages Programmable Only
Through Mutual Authentication
– Battery Check and Charge Functions
– Each User Page is Lockable
– Resonant Frequency: 134.2 kHz
– Integrated Resonant Frequency Trimming
• Low-Frequency 3D Wakeup Receiver
– Highest Communication Range of More
Than Three Meters
– High Input Sensitivity: 3.7 mV_pp (Typ)
– High Q System
– Integrated Resonant Circuit Trimming
Compensates for Component Offsets
– Received Signal Strength Indicator (RSSI)
Output for Each Channel
– Resonant Circuit Usable as Clock
Reference for Microcontroller (134.2 kHz)
– Frequency Range: 120 kHz to 140 kHz
– Ultra-Low Standby Current: 3.8 μA (Typ)
– Interface to up to Three External Antennas
– Two Different Programmable Wake Patterns
– Selectable Wake Pattern Length:
0, 4, 8 or 16 Bits
– Two Separate Adjustable Wake-Up Levels
– Digital Channel Sensitivity Adjustment for
Each Antenna
DESCRIPTION
The TMS37126 Remote Access Identification Device (RAID) IC combines two functions in one device:
• 3D wakeup receiver
• DST80 immobilizer interface
The RAID has an SPI interface to connect it to an external microcontroller. RAID is ideally suited for passive
entry applications. The 3D low-frequency (LF) wakeup receiver offers high sensitivity to receive LF signals
between 120 kHz and 140 kHz and has several other features such as received signal strength indicator (RSSI)
measurement and bidirectional LF signaling.
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2012, Texas Instruments Incorporated