National Manuals

The LMV551/LMV552/LMV554 are high performance, low power operational amplifiers. They feature 3 MHz of bandwidth while consuming only 37 μA of current per amplifier, which is an exceptional bandwidth to power ratio in this op amp class. These amplifiers are unity gain stable and provide an excellent solution for low power applications requiring a wide bandwidth. The LMV551/LMV552/LMV554 have a rail-to-rail output stage and an input common mode range that extends below ground. The LMV551/LMV552/LMV554 have an operating supply voltage range from 2.7V to 5.5V. These amplifiers can operate over a wide temperature range (−40°C to 125°C) making them a great choice for automotive applications, sensor applications as well as portable instrumentation applications. The LMV551 is offered in the ultra tiny 5-Pin SC70 and 5-Pin SOT-23 package. The LMV552 is offered in an 8-Pin MSOP package. The LMV554 is offered in the 14-Pin TSSOP.

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The LM22674 is National Semiconductor's 500mA single-chip step-down switch power supply controller, which integrates the constant voltage controller, PWM generator, error amplifier, current detector and other functional circuits. It is suitable for power supply design with few external components.

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The LP3933 is a complete lighting management system designed for portable wireless applications. It contains a boost DC/DC converter, 4 white-LED drivers to drive the main LCD panel backlight, 2 white-LED drivers for the sub- LCD panel and two sets of RGB/FLASH LED drivers. Both backlight drivers have 8-bit constant current drivers that are separately adjustable and matched to 0.5% (typ.). The RGB LED drivers are PWM-driven with programmable color, intensity and blinking patterns. In addition, they feature a FLASH function to support picture taking with camera- enabled cellular phones. An efficient magnetic boost DC/DC converter provides the required bias for LEDs, operating from a single Li-Ion bat- tery. The DC/DC converter output voltage is user program- mable from 4.1V to 5.3V for adapting to different LED types and for efficiency optimization. All functions are software controllable through a SPI interface and 19 internal registers.

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The DS90CF363 is a 3.3V LVDS transmitter that converts 21 bits of CMOS/TTL data into three LVDS data streams. It supports clock frequencies from 20 to 65 MHz and resolutions up to VGA, SVGA, XGA, etc. The narrow bus design reduces cable size and cost, while the low EMI LVDS devices ensure reliable transmission.

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The LP8900 is a dual linear regulator capable of supplying 200mA output current per regulator. Designed to meet the requirements of RF/Analog circuits, the LP8900 provides low device noise, High PSRR, low quiescent current and superior line transient response figures. Using new innovative design techniques the LP8900 offers class-leading device noise performance without a noise by- pass capacitor. The LP8900 is designed to be stable with space saving ceramic capacitors as small as 0402 case size, enabling a solution size <4mm 2. Performance is specified for a -40°C to 125°C junction temperature range. Output voltage options are available between 1.2V and 3.6V, for availability please contact your local NSC sales office.

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The LM22671 series of regulators are monolithic integrated circuits which provide all of the active functions for a step- down (buck) switching regulator capable of driving up to 500 mA loads with excellent line and load regulation characteristics. High efficiency (>90%) is obtained through the use of a low ON-resistance N-channel MOSFET. The series consists of a fixed 5V output and an adjustable version. The SIMPLE SWITCHER® concept provides for an easy to use complete design using a minimum number of external components and National’s WEBENCH® design tool. National’s WEBENCH® tool includes features such as external component calculation, electrical simulation, thermal simulation, and Build-It boards for easy design-in. The switching clock frequency is provided by an internal fixed frequency oscillator which operates at 500 kHz. The switching frequency can also be adjusted with an external resistor or synchronized to an external clock up to 1 MHz. It is also possible to self- synchronize multiple regulators to share the same switching frequency. The LM22671 series also has built in thermal shutdown, current limiting and an enable control input that can power down the regulator to a low 25 µA quiescent current standby condition. An adjustable soft-start feature is provided by selecting an appropriate external soft-start capacitor.

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DS25CP102 is a 3.125Gbps 2x2 LVDS crosspoint switch optimized for high-speed signal routing and switching over lossy FR-4 printed circuit board backplanes and balanced cables.

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LM22679 5A SIMPLE SWITCHER® is a series of adjustable soft-start and current-limited step-down voltage regulators with a wide input voltage range, internal voltage mode control, stable low ESR ceramic capacitors, 100 mΩ N-channel MOSFET, output voltage options, and ±1.5% feedback.

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The ADC08L060 is a low-power, 8-bit, monolithic analog-to-digital converter with an on-chip track-and-hold circuit. Optimized for low cost, low power, small size, and ease of use, this product operates at conversion rates of 10 MSPS to 60 MSPS while consuming just 0.65 mW per MHz of clock frequency, or 39 mW at 60 MSPS. Raising the PD pin puts the ADC08L060 into a Power Down mode where it consumes about 1 mW. The unique architecture achieves 7.6 Effective Bits. The ADC08L060 is resistant to latch-up and the outputs are short-circuit proof. The top and bottom of the ADC08L060s reference ladder are available for connections, enabling a wide range of input possibilities. The digital outputs are TTL/ CMOS compatible with a separate output power supply pin to support interfacing with 1.8V to 3V logic. The output coding is straight binary and the digital inputs (CLK and PD) are TTL/ CMOS compatible. The ADC08L060 is offered in a 24-lead plastic package (TSSOP) and is specified over the industrial temperature range of −40°C to +85°C.

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The LM2734 regulator is a monolithic, high frequency, PWM step-down DC/DC converter in a 6-pin Thin SOT23 package. It provides all the active functions to provide local DC/DC conversion with fast transient response and accurate regulation in the smallest possible PCB area. With a minimum of external components and online design support through WEBENCH®, the LM2734 is easy to use. The ability to drive 1A loads with an internal 300mΩ NMOS switch using state-of-the-art 0.5µm BiCMOS technology results in the best power density available. The world class control circuitry allows for on-times as low as 13ns, thus supporting exceptionally high frequency conversion over the entire 3V to 20V input operating range down to the minimum output voltage of 0.8V. Switching frequency is internally set to 550kHz (LM2734Y) or 1.6MHz (LM2734X), allowing the use of extremely small surface mount inductors and chip capacitors. Even though the operating frequencies are very high, efficiencies up to 90% are easy to achieve. External shutdown is included, featuring an ultra-low stand-by current of 30nA. The LM2734 utilizes current-mode control and internal compensation to provide high-performance regulation over a wide range of operating conditions. Additional features include internal soft-start circuitry to reduce inrush current, pulse-by-pulse current limit, thermal shutdown, and output over-voltage protection.

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The DS25BR440 is a 3.125 Gbps Quad LVDS buffer opti- mized for high-speed signal routing and repeating over lossy FR-4 printed circuit board backplanes and balanced cables.

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The LM3224 is a step-up DC/DC converter from National Semiconductor with a 0.15Ω (typ.), 2.45A (typ.) internal switch and pin selectable operating frequency. With the ability to convert 3.3V to multiple outputs of 8V, -8V, and 23V, the LM3224 is an ideal part for biasing TFT displays. With the high current switch it is also ideal for driving high current white LEDs for flash applica- tions.

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LM1246 is a 150MHz I2C compatible RGB preamplifier with internal 512 character OSD ROM, 512 character RAM and 4 DACs

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LMV861/LMV862 are CMOS input, low power op amp IC's, providing a low input bias current, a wide tem- perature range of −40°C to +125°C and exceptional perfor- mance making them robust general purpose parts.

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The DS10BR254 is a 1.5 Gbps 1:4 LVDS repeater optimized for high-speed signal routing and distribution over FR-4 print- ed circuit board backplanes and balanced cables.

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The LM2673 series is a monolithic integrated circuit that provides all of the active functions for a step-down (buck) switching regulator capable of driving up to 3A loads with excellent line and load regulation characteristics. High efficiency (>90%) is obtained through the use of a low ON-resistance DMOS power switch. The series consists of fixed output voltages of 3.3V, 5V and 12V and an adjustable output version. The SIMPLE SWITCHER concept provides for a complete design using a minimum number of external components. A high fixed frequency oscillator (260KHz) allows the use of physically smaller sized components. The ability to reduce the input surge current at power-ON by adding a softstart timing capacitor to gradually turn on the regulator. The LM2673 series also has built-in thermal shutdown and resistor programmable current limit of the power MOSFET switch to protect the device and load circuitry under fault conditions. The output voltage is guaranteed to a ±2% tolerance. The clock frequency is controlled to within a ±11% tolerance.

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The LM4879 1.1 Watt Audio Power Amplifier is a high performance audio power amplifier specifically designed for demanding applications in mobile phones and other portable communication device applications. It can deliver 1.1 watt of continuous average power to an 8Ω BTL load with less than 1% distortion (THD+N) from a 5VDC power supply.

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The LM94023 is a precision analog output CMOS integrated-circuit temperature sensor that operates at a supply voltage as low as 1.5 Volts. It has a dual-gain structure and class AB output, suitable for driving heavy loads. It operates over a wide temperature range of -50°C to +150°C, delivering an output voltage inversely proportional to measured temperature. It has low supply current, making it ideal for battery-powered systems and general temperature sensing applications. The gain of the temperature-to-voltage output transfer function can be set using the gain select pin.

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The CP3UB17 is a reconfigurable connectivity processor from National Semiconductor Corporation. It features a powerful RISC core, on-chip SRAM and Flash memory, hardware communications peripherals, external bus, software resources, and so on.

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The CP3BT10 is a re-programmable connectivity processor from National Semiconductor Corporation with Bluetooth® and USB interfaces. The processor combines a powerful RISC core with on-chip SRAM and Flash memory for high computing bandwidth, communication peripherals for high I/O bandwidth, and an external bus for system expandability.

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