2-Cell Lithium-Ion Fuel Gauge and Protector: The bq28400 provides battery capacity and safety monitoring optimized specifically for 2-cell Li-Ion and Li-Pol applications. This single-chip fuel gauge and analog front end (AFE) provide a first level of protection against all cell fault conditions: over/undervoltage, overcurrent, temperature, and imbalance between cells.
Resources: Data sheet, application note

• High accuracy of internal 16-bit ADC assures maximum capacity utilization during pack discharge as well as maximum capacity restored during charge 
• Flexible fuel gauging algorithm with self-discharge compensation
• Applications: Tablet, netbook, digital video camera (DVC), medical equipment, and any 2-cell Li-Ion applications

bq28400: Price (1ku): $3.20 – $3.85

Dual-Supply SIM Card Voltage Translator Transceiver with Integrated LDO Voltage Regulator and ESD Protection: The TXS02324 is a complete dual-supply standby Smart Identity Module (SIM) card solution for interfacing wireless baseband processors with two individual SIM subscriber cards to store data for mobile handset applications.  It includes a high-speed level translator that supports Class-B (2.95-V) and Class-C (1.8-V) interfaces, an integrated fast-mode 400-kb/s slave I²C control register interface for configuration purposes, and a 32-kHz clock input for internal timing generation.
Resources: Data sheet

• Integrated LDO regulator with 50mA
• Complies with ISO/IEC Smartcard Interface requirements as well as GSM and 3G mobile standards
• Applications: Cell phones

TXS02324: Price (1ku): $1.30

3-Channel Integrated EMI Filter for SIM Interface: The TPD3F303 integrates EMI filtering and ESD protection of the highest standard (IEC 6100-4-2 level 4). It features the +B25 space-saving design of 1.7mm x 1.35mm and an extended temperature range of -40°C to +125°C.
Resources: Data sheet, IBIS Model

• Integrates bidirectional EMI/RFI filtering, line termination resistance values and ESP protection
• Breakdown voltage of 6V suppresses ESD strikes to manageable levels
• Applications: Mobile handsets, mobile internet devices, PDAs, tablets, video consoles, portable computers

TPD3F303: Price (1ku): $0.27

11-MHz, Single-Supply, Low-Noise, Precision, Rail-to-Rail Output, JFET Amp: The OPA4140 combines the benefit of high precision and FET input with very low noise and low operating voltage (down to 4.5V). The rail-to-rail output swing and input range that includes V– allow designers to take advantage of the low-noise characteristics of JFET amplifiers while also interfacing to modern, single-supply, precision ADCs and DACs.
Resources: Data sheet, noise diagram, TINA-TI™ Spice model, TINA-TI reference design

• Achieves 11-MHz unity-gain bandwidth and 20-V/µs slew rate while consuming only 1.8mA (typ) of quiescent current
• Offset voltage: 120µV (max); offset drift: 1µV/°C (max)
• Applications: Battery-powered instruments, medical instrumentation, process automation and control, precision data acquisition, automatic test equipment (ATE), photodiode amplifier

OPA4140: Price (1ku): $4.75 – $5.70

Low-Jitter, 2-Input Selectable 1:12 Universal-to-LVDS Buffer: The CDCLVD12xx/21xx family of LVDS buffers are highly versatile, low additive jitter buffers that provide customers 4, 8, 12 or 16 copies of LVDS clock outputs in small, flexible QFN packages.
Resources: Data sheet, block diagram, evaluation module, IBIS model

• Low output skew (20ps max)
• Universal inputs: LVCMOS, LVDS or LVPECL
• Applications: Router/switch, datacom/telecom, wireless infrastructure, medical, networking, general-purpose differential buffer

CDCLVD1212: Price (1ku): $4.75 – $5.50

Ultra Low-Power, Digital Temperature Sensor with 2-Wire Interface in Chip-Scale Package: The TMP103 is 85% smaller and 97% lower power than other solutions in the market. Designed to be easily placed in multiple locations, this device provides a thermal map of the system through a single command.
Resources: Data sheet, functional diagram, evaluation module, IBIS Model

• Quiescent current = 3µA (max); shutdown current = 1µA (max); supply
  range = 1.4V to 3.6V
• Footprint: 0.76mm x 0.76mm; profile: 0.625mm (max)
• Applications: Handsets, tablets, notebook PCs, environmental control systems

TMP103: Price (1ku): $0.39