GENERAL DESCRIPTION
 The XR16M25501 (M2550) is a high performance dual universal asynchronous receiver and transmitter (UART) with 16 bytes TX and RX FIFOs.
The device operates from 1.62 to 3.63 volts and is pin-to-pin and software compatible to the ST16C2550, XR16L2550, and XR16V2550.
It supports Exar’s enhanced features of selectable FIFO trigger level, automatic hardware (RTS/CTS) and software flow control, and a complete modem interface.
Onboard registers provide the user with operational status and data error flags. An internal loopback capability allows system diagnostics.
Independent programmable baud rate generators are provided in each channel to select data rates up to 16 Mbps at 3.3 Volt with 4X sampling clock.
The M2550 is available in 48-pin TQFP and 32-pin QFN packages.

FEATURES
* 1.62 to 3.63 Volt Operation
* Pin-to-pin and software compatible to ST16C2550 in the 48-TQFP package
* Pin-to-pin and software compatible to XR16L2550 and XR16V2550
* Two independent UART channels
- Register set is 16550 compatible
- Data rate of up to 16 Mbps at 3.3 V
- Data rate of up to 12.5 Mbps at 2.5 V
- Data rate of up to 8 Mbps at 1.8V
- Fractional Baud Rate Generator
- Transmit and Receive FIFOs of 16 bytes
- Selectable TX and RX FIFO Trigger Levels
- Automatic Hardware (RTS/CTS) Flow Control
- Automatic Software (Xon/Xoff) Flow Control
- Wireless Infrared (IrDA 1.0) Encoder/Decoder
- Automatic sleep mode
- Full modem interface
* Device Identification and Revision
* Crystal oscillator (up to 24MHz) or external clock (up to 64MHz) input
* 48-TQFP and 32-QFN packages

APPLICATIONS
* Portable Appliances
* Telecommunication Network Routers
* Ethernet Network Routers
* Cellular Data Devices
* Factory Automation and Process Controls

XR16M2550IL32
XR16M2550IM48

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DESCRIPTION
 The DG469/470 are high voltage SPDT switches, with a typical on resistance of 3.6 Ω and typical flatness of 0.4 Ω.
The DG469 and DG470 are identical, except the DG470 provides an enable input.
When the enable input is activated, both sides of the switch are in a high impedance mode (Off), maintaining a "Safe State" at power up.
This function can also be used as a quick "disconnect" in the event of a fault condition.
For audio switching, the enable pin provides a mute function.
These are high voltage switches that are fully specified with dual supplies at ± 4.5 V and ± 15 V and a single supply of 12 V over an operating temperature range from - 40 °C to + 125 °C.
Fast switching speeds coupled with high signal bandwidth makes these parts suitable for video switching applications.
All digital inputs have 0.8 V and 2.4 V logic thresholds ensuring low voltage TTL/CMOS compatibility.
Each switch conducts equally well in both directions when on and can handle an input signal range that extends to the supply voltage rails.
They exhibit breakbefore- make switching action to prevent momentary shorting when switching between channels.
The DG469 and DG470 are offered in a MSOP 8 and SOIC 8 package.

FEATURES
* Low on resistance (3.6 Ω typical)
* On resistance flatness (0.4 Ω typical)
* 44 V supply maximum rating
* ± 15 V analog signal range
* Fully specified at supply voltages of ± 4.5 V, 12 V and ± 15 V
* TTL/CMOS compatible
* Break before make switching guaranteed
* Total harmonic distortion 0.0145 %

APPLICATIONS
* Audio and video signal switching
* Precision automatic test equipment
* Precision data acquisition
* Relay replacement
* Communications systems
* Automotive applications
* Sample and hold systems
* Power routing applications
* Telecom signal switching
* Medical equipment
* Portable and battery power systems

DG469EQ-T1-E3
DG470EQ-T1-E3
DG469EY-T1-E3
DG470EY-T1-E3

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Description
 The M25P40 is a 4 Mbit (512 K × 8) Serial Flash memory, with advanced write protection
mechanisms, accessed by a high speed SPI-compatible bus.
The memory can be programmed 1 to 256 bytes at a time, using the Page Program instruction.
The memory is organized as 8 sectors, each containing 256 pages.
Each page is 256 bytes wide.
Thus, the whole memory can be viewed as consisting of 2048 pages, or 524,288 bytes.
The whole memory can be erased using the Bulk Erase instruction, or a sector at a time,
using the Sector Erase instruction.
In order to meet environmental requirements, Numonyx offers the M25P40 in ECOPACK®
packages.
ECOPACK® packages are Lead-free and RoHS compliant.

Features
* 4 Mbit of Flash memory
* 2.3 V to 3.6 V single supply voltage
* SPI bus compatible serial interface
* 50 MHz clock rate (maximum)
* Page Program (up to 256 bytes) in 1.5 ms (typical)
* Sector Erase (512 Kbit) in 1 s (typical)
* Bulk Erase (4 Mbit) in 4.5 s (typical)
* Deep Power-down mode 1 μA (typical)
* Hardware Write Protection: protected area size defined by three non-volatile bits (BP0, BP1 and BP2)
* Electronic signatures
– JEDEC standard two-byte signature (2013h)
– RES instruction, one-byte, signature (12h), for backward compatibility
* Packages
– ECOPACK® (RoHS compliant)

M25P40-VMN6TP/X
M25P40-VMP3G/X

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General Description
• The LA317 is an adjustable 3-terminal positive voltage regulator with a very low dropout of 1.2V at 1A output current.
Using 2 external resistors, the LA317 can provide an adjustable output voltage down to 1.25V.
• The LA317 is available in standard SOT-223, D-PACK, TO-220 and D2-PACK packages.

Features
• Typical 1% output voltage tolerance
• Typical 0.01%/V line reglation
• Typical 0.2% Load Regulation
• Very low dropout voltage: 1.2V at 1A output current
• Trimmed current limit
• On-chip thermal protection
• RoHS Compliance

Applications
• PC Motherboard
• LCD Monitor
• Graphic Card
• DVD Player
• Network Interface Card/Switch
• Telecom Equipment
• Printer and other Peripheral Equipment

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GENERAL DESCRIPTION
 The AMS3100-1.2 are two-terminal micropower band-gap voltage reference that feature a very low dynamic impedance and good temperature coefficient, operating over a 10μA to 20mA current range.
AMS3100-1.2 is trimmed at wafer test level to optimize the temperature coefficient and tight output voltage tolerance.
The advanced process technology used, makes the AMS3100-1.2 exceptionally tolerant of capacitive loading, making it easy to use in almost any reference application.
The wide dynamic operating range allows its use with widely varying supplies with excellent regulation.
The extremely low power drain, makes these reference diodes useful for micropower circuitry. These voltage references can be used to make portable meters, regulators or general purpose analog circuitry with battery life approaching shelf life.
Further more, the wide operating current allows it to replace older references with a tight tolerance part.
Pin to pin compatible with other standard industry references, the AMS3100-1.2 offers the advantage of long term stability at low cost.

FEATURES
* ±6 mV (±0.5%) max. initial tolerance (A grade)
* Operating Current 10mA to 20mA
* Low Voltage Reference 1.240
* Max. 0.5W Dynamic Impedance (A grade)
* Low Temperature Coefficient
* SOT-23 Package Available
* Low cost

APPLICATIONS
* Battery Powered Systems
* Instrumentation
* A/D, D/A Converters
* Temperature measurement
* Current sources
* Notebook/Personal Computer
* Monitors/ VCR/ TV
* Pagers

AMS3100-1.2AM
AMS3100-1.2BM
AMS3100-1.2CM

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Overview
 AN34001A is a nine-output power supply IC, consisting of five linear regulator (one adjustable) and four voltage followers.
Seven ofthe outputs are controlled by three control switches.

Features
* Thermal protection circuit.
* Short circuit protection circuit
* Over voltage protection circuit
* Operating supply voltage range: 6.6 V to 18.0 V (13.2 V typical)
* High maximum operating voltage: 26 V

Application
* Voltage supply for car audio system

Package
* 16 pin plastic zigzag inline package with heat sink (ZIP type)

Type
* Silicon monolithic bipolar IC

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GENERAL DESCRIPTION
 The A25L16P is a 16 Mbit (2M x 8) Serial Flash Memory, with advanced write protection mechanisms, accessed by a high speed SPI-compatible bus.
The memory can be programmed 1 to 256 bytes at a time, using the Page Program instruction. The memory is organized as 32 sectors, each containing 256 pages.
Each page is 256 bytes wide.
Thus, the whole memory can be viewed as consisting of 8192 pages, or 2,097,152 bytes.
The whole memory can be erased using the Bulk Erase instruction, or a sector at a time, using the Sector Erase instruction.

FEATURES
* 16 Mbit of Flash Memory
* Flexible Sector Architecture (4/4/8/16/32)KB/64x31 KB
* Bulk Erase (16 Mbit) in 20s (typical)
* Sector Erase (512 Kbit) in 1s (typical)
* Page Program (up to 256 Bytes) in 1.5ms (typical)
* 2.7 to 3.6V Single Supply Voltage
* SPI Bus Compatible Serial Interface
* 85MHz Clock Rate (maximum)
* Fast Read Dual Operation Instruction (3Bh/BBh)
* Deep Power-down Mode 1μA (typical)
* Top or Bottom Boot Block Configuration Available
* Electronic Signature
- JEDEC Standard Two-Byte Signature (2015h, Bottom; or 2025, Top)
- RES Instruction, One-Byte, Signature (14h)
* Package Options
- 8-pin SOP (209mil), 16-pin SOP, or 8-pin QFN
- All Pb-free (Lead-free) products are ROHS complaint

A25L16PTN-UF
A25L16PTQ-UF
A25L16PUN-F
A25L16PUQ-F

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The S-T111 Series is a positive voltage regulator with a low dropout voltage, high output voltage accuracy, and low current consumption developed based on CMOS technology.
A built-in low on-resistance transistor provides a low dropout voltage and large output current, and a builtin overcurrent protector prevents the load current from exceeding the current capacitance of the output transistor.
An ON/OFF circuit ensures a long battery life.
Compared with the voltage regulators using the conventional CMOS process, a larger variety of capacitors are available, including small ceramic capacitors.
A small SOT-23-5 package realizes highdensity mounting.

Features
• Output voltage: 1.5 V to 5.5 V, selectable in 0.1 V steps.
• High-accuracy output voltage: ±1.0%
• Low dropout voltage: 190 mV typ. (3.0 V output product, IOUT = 100 mA)
• Low current consumption: During operation: 50 μA typ., 90 μA max.
                                        During shutdown: 0.1 μA typ., 1.0 μA max.
• High peak current capability: 150 mA output is possible (at VIN ≥ VOUT(S) + 1.0 V)*1
• Built-in ON/OFF circuit: Ensures long battery life.
• Low ESR capacitor can be used: A ceramic capacitor of 0.1 μF or more can be used for the output capacitor.
• High ripple rejection: 80 dB typ. (at 1.0 kHz)
• Built-in overcurrent protector: Overcurrent of output transistor can be restricted.
• Small package: SOT-23-5
• Lead-free products
*1. Attention should be paid to the power dissipation of the package when the output current is large.

Applications
• Power supply for battery-powered devices
• Power supply for personal communication devices
• Power supply for home electric/electronic appliances
• Power supply for cellular phones

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Description
The SE5117 is an efficient linear voltage regulator. It has extra low dropout voltage.
At light loads the typical dropout voltage is 5.5mV, and at full load the typical dropout voltage is
650mV. The output voltage accuracy is better than 2%.
The SE5117 has low ground current, so it can help prolong battery life. The SE5117 is specially
designed for hand-held, battery-powered devices.

Features
Typical 90mV dropout voltage at 150mA. Guaranteed 1A output over the full operating temperature range.
650mV typical dropout voltage at full load.
Extremely tight load and line regulation.
Low temperature coefficient.
Current and thermal limiting.
No-load stability.
Standard SOT-223 package.

Application
Active SCSI terminators.
Post regulators for switching supplies.
Battery chargers.
High-efficiency linear power supplies.
Computer motherboard, display, graphic card DC/DC converter, such as 3.3V to 2.8V or 3.3V to 2.5V.

SE5117ASG
SE5117BSG

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Two New LED Drivers from National’s PowerWise Energy-Efficient Product Family Feature Constant Current, Low Feedback Voltage

LEDs 2007, SAN DIEGO, Calif. – October 22, 2007 -
National Semiconductor Corporation (NYSE:NSM) today added two new light-emitting diode (LED) drivers to its PowerWise® energy-efficient product family.  National’s LM3401 and LM3405A LED drivers power 1W to 5W, high-brightness LEDs found in industrial and automotive applications as well as general illumination applications such as solid state and signage.  Each offers a wide input voltage range and provides a constant current to regulate the LED brightness and low feedback voltage to minimize power dissipation.

Featuring a voltage range from 4.5V to 35V, National’s high-efficient LM3401 LED driver includes a scalable current drive of greater than 3A and a 100 percent duty cycle.  A low feedback voltage of 0.2V and accuracy within 3 percent provides a constant current to provide constant color output from an LED. 

The LM3405A LED driver features a voltage range from 3V to 22V and is able to regulate from a loosely coupled 12V AC rail found in industrial and commercial lighting applications.  The small SOT-23 package allows LEDs to be placed into small-form factor light bulbs to offer higher efficiency versus the traditional halogen and incandescent sources for illumination.

National’s two new LED drivers will be shown in National’s booth #26 at the LEDs 2007 conference in San Diego from Oct. 24 to 27.
 
Technical Features of the LM3401 LED Driver
The LM3401 is a high-efficiency hysteretic PFET switching controller that provides a high-performance, constant current drive to a string of LEDs resulting in a constant color output.  An adjustable hysteretic window allows for flexibility in component selection and overall design simplicity.  No external compensation is required.  The regulated LED current is sensed and is compared to the reduced feedback of 0.2V for current sensing which eliminates the need for an output capacitor.  Offered in an 8-pin mini SOIC package, the LM3401 has programmable over current voltage protection and a DIM input pin for PWM inputs to control dimming.  For more information on the LM3401 or to order samples and an evaluation board, visit http://www.national.com/pf/LM/LM3401.html

Technical Features of the LM3405A LED Driver
The new LM3405A extends the voltage range of National’s previously announced LM3405 up to 22V.  Offered in a tiny 6-pin SOT-23 package, the LM3405A constant-current buck regulator delivers up to 1A of current to drive 3W or 5W LEDs.  With a 0.2V reference voltage for constant-current feedback control, internal compensation and a fixed 1.6 MHz switching frequency, the LM3405A provides a simple, highly-efficient solution for driving LEDs.  The LM3405A also includes an EN/DIM pin for pulse-width-modulation (PWM) dimming.  The LM3405A drives general illumination for industrial and commercial lighting applications from the 12V AC and 12V DC rail. 
For more information on the LM3405A and LM3405 or to order samples and an evaluation board, visit http://www.national.com/pf/LM/LM3405A.html
and http://www.national.com/pf/LM/LM3405.html.

For more information on National’s lighting solutions, visit http://www.national.com/led.

About National’s Power Management Products
National solves power management design problems in space- and energy-constrained applications from feature-rich handheld devices through large line-powered systems. From the novice power designer to the power expert, National’s products, people and design tools enable customers to design green-powered systems with complex power supplies in the shortest amount of time. High-performance products include switching regulators such as National’s flagship SIMPLE SWITCHER® family, and application-specific products including white-LED drivers and Power-over-Ethernet controllers. More information about National’s power management products is available at http://www.national.com/power.

Availability and Pricing
Available now, the LM3401 is priced at 75 cents each and the LM3405A is $1.30 in 1,000-unit quantities.

Note to editors:  To view a high-resolution downloadable photo of these products, visit National's photo gallery at http://www.national.com/company/pressroom/gallery/power.html.

About National’s PowerWise Brand
National’s PowerWise brand reflects the company’s energy-efficient product portfolio.  It signifies products with outstanding performance-to-power at the component level, as well as products that provide an outstanding, energy-efficient solution when coupled with other National parts.  National’s PowerWise family of products features energy-efficient power management, operational amplifiers, interface and data conversion products.  For more information about National’s PowerWise brand, visit: http://national.com/powerwise
.

About National Semiconductor
National Semiconductor, the industry's premier analog company, creates high-value analog devices and subsystems. National's leading-edge products include power management circuits, display drivers, audio and operational amplifiers, interface products and data conversion solutions. National's key analog markets include wireless handsets, displays, communications infrastructure, medical, automotive, industrial, and test and measurement applications. Headquartered in Santa Clara, Calif., National reported sales of $1.93 billion for fiscal 2007, which ended May 27, 2007. Additional company and product information is available at http://www.national.com.

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