National Manuals (Industrial)

The MM5452 is a monolithic integrated circuit utilizing CMOS metal gate, low threshold enhancement mode devices. It can drive up to 32 segments of LCD and can be paralleled to increase this number. The chip is capable of driving a 41⁄2-digit 7-segment display with minimal interface between the display and the data source. The MM5452 stores display data in latches after it is clocked in, and holds the data until new display data is received. Features include serial data input, no load signal required, DATA ENABLE (MM5452), wide power supply operation, TTL compatibility, 32 or 33 outputs, alphanumeric and bar graph capability, cascaded operation capability.

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LMK01000/LMK01010/LMK01020 is a high performance clock buffer, divider and distributor that provides an easy way to divide and distribute high performance clock signals throughout the system. The device provides best-in-class noise performance and is designed to be pin-to-pin and footprint compatible with LMK03000/LMK02000 family of precision clock conditioners. The LMK01000/LMK01010/LMK01020 family features two programmable clock inputs (CLKin0 and CLKin1) that allow the user to dynamically switch between different clock domains. Each device features 8 clock outputs with independently programmable dividers and delay adjustments. The outputs of the device can be easily synchronized by an external pin (SYNC*).

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The LM3150 is a simple step-down power controller from National Semiconductor that can provide up to 12A of output current in a typical application. It features an adjustable output voltage down to 0.6V, an input voltage range of 6V-42V, and a switching frequency that can be adjusted up to 1MHz. The LM3150 uses a proprietary Emulated Ripple Mode (ERM) control that allows for the use of low ESR output capacitors, which reduces overall solution size and output voltage ripple.

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This datasheet provides detailed information on the LME49870, a high performance, high fidelity audio operational amplifier with low distortion, low noise, and high slew rate.

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The LMV851/LMV852/LMV854 are National’s low power, CMOS input, EMI hardened operational amplifiers. They offer low input bias current, a wide temperature range of -40 °C to +125 °C and exceptional performance, making them robust general purpose parts. Additionally, the LMV851/LMV852/LMV854 are EMI hardened to minimize any interference so they are ideal for EMI sensitive applications. The unity gain stable LMV851/LMV852/LMV854 feature 8 MHz of bandwidth while consuming only 0.4 mA of current per channel. These parts also maintain stability for capacitive loads as large as 200 pF. The LMV851/LMV852/ LMV854 provide superior performance and economy in terms of power and space usage. This family of parts has a maximum input offset voltage of 1 mV, a rail-to-rail output stage and an input common-mode voltage range that includes ground. Over an operating supply range from 2.7V to 5.5V the LMV851/LMV852/LMV854 provide a CMRR of 92 dB, and a PSRR of 93 dB. The LMV851/LMV852/LMV854 are offered in the space saving 5-Pin SC70 package, the 8-Pin MSOP and the 14-Pin TSSOP package.

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LM2794/LM2795 Current Regulated Switched Capacitor LED Supply with Analog and PWM Brightness Control

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The LM3524D is a pulse width modulator with ±1% precision 5V reference. The output drive transistor current carrying capability has been increased to 200 mA while reducing VCEsat and increasing VCE breakdown to 60V. The error-amp common mode voltage range has been increased to 5.5V to eliminate the need for a resistive divider from the 5V reference. In the LM3524D, the circuit bias line has been isolated from the shutdown pin. This prevents the oscillator pulse amplitude and frequency from being disturbed by shutdown. Additionally, at high frequencies (~300 kHz), the max. duty cycle per output has been improved to 44% compared to 35% max. duty cycle in other 3524s. In addition, the LM3524D can now be synchronized externally, through pin 3. A latch has also been added to insure one pulse per period even in noisy environments. The LM3524D includes double pulse suppression logic that insures when a shutdown condition is removed the state of the T-flip-flop will change only after the first clock pulse has arrived. This feature prevents the same output from being pulsed twice in a row, thus reducing the possibility of core saturation.

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The LM4904 is an audio power amplifier primarily designed for demanding applications in mobile phones and other portable communication device applications. It is capable of delivering 1 watt of continuous average power to an 8Ω BTL load with less than 1% distortion (THD+N) from a 5VDC power supply. The LM4904 does not require output coupling capacitors or bootstrap capacitors, and therefore is ideally suited for mobile phone and other low voltage applications where minimal power consumption is a primary requirement. It features a low-power consumption shutdown mode and an internal thermal shutdown protection mechanism.

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The LMH0356 is a 3Gbps HD/SD SDI Reclocker that supports a 4:1 input multiplexer and FR4 EQs. It complies with the SMPTE 424M, SMPTE 292M, and SMPTE 259M (C) standards and supports data rates of 270Mbps, 1.483Gbps, 1.485Gbps, 2.967Gbps, and 2.97Gbps. It also supports DVB-ASI operation at 270Mbps.

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DS92001 is a 3.3V B/LVDS-BLVDS buffer that accepts a BLVDS input signal and provides a BLVDS output signal. The device can accept LVPECL, CML as well as LVDS signals, and has TRI-STATE outputs, a receiver input threshold of less than ±100 mV, a propagation delay of 1.4 ns (typical), and very low jitter.

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The LM22676 3A SIMPLE SWITCHER® is a step-down voltage regulator with precision enable function. It has a wide input voltage range of 4.5V to 42V and can output 5V or 1.285V. It has internal compensation voltage mode control, high stability, can use low ESR ceramic capacitors, and has 120mΩ N-channel MOSFET TO-263 THIN package and 100mΩ N-channel MOSFET PSOP-8 package. It has ±1.5% feedback reference accuracy and a switching clock frequency of 500kHz.

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The LM3590 series white LED driver is a white LED constant current driver capable of supplying up to 3 white LEDs connected in series with 20mA. This device operates over a wide 6V-12.6V input voltage range. The output can accomodate LEDs with a combined forward voltage of up to 11.5V, from a 12V input supply. The LED drive current is programmed by using an external resistor on the ISET pin. LED brightness can be linearly varied up to the programmed LED current by applying a Pulse Width Modulated (PWM) signal to the EN pin of the device. The LED output current of the LM3590 is tightly controlled over temperature and voltage. LED Current matching is guaranteed due to the series configuration of the LEDs. The series topology also simpli- fies the connection between the White LEDs in the display module and the LM3590 since only one connection is re- quired. The LM3590 typically draws only 50µA when operating in the no-load condition and draws less than 0.1µA when the de- vice is shut down. The LM3590 is available in a small 5-pin SOT23 package.

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The FPD87352CXA is an integrated FPD-Link™ + RSDS + TFT-LCD Timing Controller, suitable for TFT-LCD monitors and TVs. It has an RTC feature that improves the intra-gray level response time of an LCD panel, resulting in a dramatically improved motion picture image quality of video content displayed on the LCD panel.

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The LM34 series are precision integrated-circuit temperature sensors, whose output voltage is linearly proportional to the Fahrenheit temperature. The LM34 does not require any external calibration or trimming to provide typical accuracies of ±1⁄2˚F at room temperature and ±11⁄2˚F over a full −50 to +300˚F tempera- ture range.

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The LM117 series of adjustable 3-terminal positive voltage regulators is capable of supplying in excess of 1.5A over a 1.2V to 37V output range. They are exceptionally easy to use and require only two external resistors to set the output voltage. Further, both line and load regulation are better than standard fixed regulators. Also, the LM117 is packaged in standard transistor packages which are easily mounted and handled. In addition to higher performance than fixed regulators, the LM117 series offers full overload protection available only in IC's. Included on the chip are current limit, thermal overload protection and safe area protection. All overload protection circuitry remains fully functional even if the adjustment terminal is disconnected. Normally, no capacitors are needed unless the device is situated more than 6 inches from the input filter capacitors in which case an input bypass is needed. An optional output capacitor can be added to improve transient response. The adjustment terminal can be bypassed to achieve very high ripple rejection ratios which are difficult to achieve with standard 3-terminal regulators. Besides replacing fixed regulators, the LM117 is useful in a wide variety of other applications. Since the regulator is “floating” and sees only the input-to-output differential voltage, supplies of several hundred volts can be regulated as long as the maximum differential voltage is not exceeded.

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The LM2738 is a high frequency, low power, 1.5A step-down DC/DC converter from TI that is available in an 8-pin LLP or 8-pin eMSOP package. It provides all the active functions for local DC/DC conversion with fast transient response and accurate regula- tion in the smallest possible PCB area. With a minimum of external components, the LM2738 is easy to use.

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The LM3595 is a parallel white-LED driver that can drive four white LEDs. It can supply a total output current of 100mA over an input voltage range of 3.0V to 5.5V. The amount of constant current sourced to the outputs is user selectable using one external sense resistor. LM3595 typically draws 0.03µA when placed in shutdown, and 200µA when operating in the no-load condition. If any of the outputs are not used, leave the pin(s) unconnected. Brightness can be controlled by both analog and PWM techniques. A voltage between 0V and 3V may be applied to the BRGT pin to vary the current. Output current will linearly track the voltage applied to the BRGT pin. An active-low level must be present on the BR-ON pin for analog brightness control to be disabled. Alternatively, a PWM signal can be applied to the EN pin to vary the perceived brightness of the LED. The LM3595 uses an active-high enable level. The LM3595 is available in National’s LLP-10 package.

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This is a description document about the ADC12030/ADC12H030 series of self-calibrating 12-bit plus sign serial I/O A/D converters.

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The LM3509 is a high efficiency current mode boost converter designed for driving white LED's and/or OLED displays. It offers dual current sinks and I2C compatible brightness control. The LM3509 can be configured as a constant current sink for driving series white LED's or as a feedback pin to set a constant output voltage for powering OLED panels. When configured as a dual output white LED bias supply, it adaptively regulates the supply voltage of the LED strings to maximize efficiency and ensure the current sinks remain in regulation. The maximum current per output can be set via a single external low power resistor. The LED current in each output can be independently adjusted from 0 to max current in 32 exponential steps using the I2C compatible interface. When configured as a white LED + OLED bias supply, the LM3509 can independently and simultaneously drive up to 5 white LED strings and provide a constant output voltage of up to 21V for OLED panels. Output over-voltage protection shuts down the device if VOUT rises above 21V, allowing for the use of small sized low voltage output capacitors. The LM3509 is offered in a small 10-pin thermally enhanced LLP package and operates over the -40°C to +85°C temperature range.

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LMH0302 3Gbps HD/SD SDI Cable Driver is a chip designed for use in SMPTE 424M, SMPTE 292M, SMPTE 344M and SMPTE 259M serial digital video applications. It drives 75Ω transmission lines (Belden 1694A, Belden 8281 or equivalent) at data rates up to 2.97 Gbps. The chip provides two selectable slew rates for SMPTE 259M and SMPTE 424M / 292M compliance. The output driver can be powered down via the output driver enable pin. The chip is powered by a single 3.3V supply. Power consumption is typically 125 mW (SD mode) and 165 mW (HD mode). The chip is available in a 16-pin LLP package.

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