Monthly Archives: November 2015

High-Power NFC Frontend Solution

Near Field Communication is starting to become commonplace with recent devices. They make transactions so much easier and energy efficient that almost every mobile OS designers offer apps or features that use NFC. The PN5180A0ET is a high-power output NFC frontend IC that runs at 13.56MHz. It uses outstanding modulation and demodulation concept completely integrated for all kinds of wireless communications.

 The PN5180 ensures maximum interoperability for next generation of NFC enabled mobile phones. The PN5180 is optimized for point of sales terminal applications and implements a high-power NFC frontend functionality which allows to achieve EMV compliance on RF level without additional external active components.

Screen Shot 2015-11-27 at 5.10.15 PM

Where Used?

  • Payment terminals
  • Physical-access readers
  • eGov readers
  • Industrial readers
  • High-performance readers

Why Used?

  • Transmitter current up to 250 mA
  • Includes NXP ISO/IEC14443-A, Innovatron ISO/IEC14443-B and NXP MIFARE Crypto 1 rights
  • Full compliance with all standards to NFC, contactless operation and EMVCo
  • Automatic EMD handling for faster design of payment terminals
  • Active load modulation supports smaller antenna with Card Emulation Mode

Related Links:

Read More…

Quad GTL/GTL+ to LVTTL/TTL Bidirectional Non-Latched Translator

GTL or Gunning Transceiver Logic is a type of logic signalling that is used in backplane buses. The GTL2005PW operates as a quad GTL/GTL+sampling receiver as an LVTTL/TTL to GTL/GTL+driver. It is designed for 3.3V system interface and is tolerant up to 5.5V allowing direct access to TTL or 5V CMOS outputs.

Quad GTL/GTL+ to LVTTL/TTL

Quad GTL/GTL+ to LVTTL/TTL

Why Use?

  • Quad bidirectional bus interface
  • Live insertion/extraction permitted
  • Latch-up protection exceeds 500 mA per JESD78
  • ESD protection exceeds 2000 V HBM per JESD22-A114, 150 V MM per JESD22-A115, and 1000 V CDM per JESD22-CC101
  • Package offered: TSSOP14

Related Links

 

Read More…

Octal UART for 3.3 V and 5 V supply voltage

Fabricated using the Philips 1.0 micron CMOS technology, the SC28L198 is low cost, high density and low power, making it a great choice for all sorts of UART applications. Boasting 8 full-duplex asynchronous channels, the single chip CMOS-LSI SC28L198 offers significantly deeper 16 byte FIFOs, automatic in band flow control and address recognition.

With over 22 fixed baud rates to choose from, you can independently select the speed of each receiver and transmitter. The ability to independently program the operating speed of the receiver and transmitter makes the Octal UART particularly attractive for dual speed full duplex channel applications such as clustered terminal systems. A power down mode is available where power consumption is greatly reduced due to the oscillator being stopped but register contents are still maintained.

 

Octal UART for 3.3 V and 5 V supply voltage

Octal UART for 3.3 V and 5 V supply voltage

Why Used?

  • Sixteen byte receiver FIFOs for each UART
  • Flow control using CTSN RTSN hardware handshaking
  • Automatic address detection in multi-drop mode
  • Fast data bus, 30 ns data bus release time, 125 ns bus cycle time
  • Programmable interrupt priorities
  • Automatic identification of highest priority interrupt pending
  • Global interrupt and control registers ease setup and interrupt handling
  • False start bit detection
  • Line break detection and generation
  • Programmable channel mode

 

Where Used?

  • Statistical Multiplexers
  • Data Concentrators
  • Automotive, Cab and engine controls
  • Entertainment Systems
  • Terminal Servers
  • Computer-Printer/Plotter Links

Related Links:

Read More…

LM75B Digital Temperature Sensor and Thermal Watchdog

If you’re looking for a well built, versatile, digital temperature sensor, the LM75B might just be what you need. The LM75B employs an on-chip band gap temperature sensor and Sigma-Delta A-to-D conversion technique with an overtemperature detection output. Also equipped with numerous data registers, the LM75B is able to store device settings like device operation mode, OS operation mode, OS polarity, OS fault queue, and many more.

The LM75B has a number of modes of operation such as normal mode, shutdown mode, two modes for OS output namely OS comparator mode and OS interrupt mode, giving you a wide array of possible uses and applications. And most importantly, between -25℃ to +100℃ an accuracy of ±2℃ is maintained. Even going up to the maximum levels of -55℃ to +125℃, an accuracy of ±3℃ can still be expected.

Digital temperature sensor and thermal watchdog

Digital temperature sensor and thermal watchdog

Why Used?

  • I²C-bus interface with up to 8 devices on the same bus
  • Power supply range from 2.8 V to 5.5 V
  • 11-bit ADC that offers a temperature resolution of 0.125 °C
  • Programmable temperature threshold and hysteresis set points
  • Stand-alone operation as thermostat at power-up
  • Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA
  • Small 8-pin package types: SO8, TSSOP8, 3 mm x 2 mm XSON8U, and 2 mm x 3 mm HWSON8

Where Used?

  • System thermal management
  • Personal computers
  • Electronics equipment
  • Industrial controllers

Related Links

Level shifting techniques in I2C-bus design

 

Read More…

11-bit DDR2 SDRAM MUX/bus Switch

The CBTU4411EE is a 11-bit bus switch with each Host port pin multiplexed to one of four DIMM port pins. A decoder driven by three hardware select pins (S0, S1 and EN) control the selection of the DIMM port all of which are SSTL_18 compatible. The CBTU4411EE is designed to have only one DIMM port active at any time.

The part incorporates a very low crosstalk design. It has a very low skew between outputs (< 30 ps) and low skew (< 30 ps) for rising and falling edges. Each switch has been optimized for connection to 1- or 2-rank DIMMs. The low internal RC time constant of the switch allows data transfer to be made with minimal propagation delay.

The CBTU4411 is characterized for operation from 0 °C to +85 °C.

11-bit DDR2 SDRAM MUX/bus switch

Why Used?

  • Optimized for use in Double Data Rate 2 (DDR2) SDRAM applications
  • Suitable to be used with 400 Mbit/s to 800 Mbit/s, 200 MHz to 400 MHz DDR2 data bus
  • Switch ON-resistance is designed to eliminate the need for series resistor to DDR2 SDRAM
  • Controlled enable/disable times support fast bus turnaround
  • Pseudo-differential select inputs support accurate and low-skew control of switching times
  • Selectable built-in termination resistors on the Sn inputs
  • Internal 400 Ω pull-down resistors on xDPn port
  • VBIAS input for optimal DIMM-port pull-down when disabled

 

Where Used?

  • DDR2 Data bus applications

Read More…