This is one of my data sheet directories.

Selected National Semiconductor Data Sheets

Here are some selected data sheets from National Semiconductor, which holds all of the data sheet copyrights.

AN-74: LM139/LM239/LM339 A Quad of Independently Functioning Comparators
AN-214: Transmission Line Drivers and Receivers for TIA/EIA Standards RS-422 and RS-423
AN-216: Summary of Well Known Interface Standards
AN-256: Circuitry for Inexpensive Relative Humidity Measurement
AN-299: Audio Applications of Linear Integrated Circuits
AN-409: Transceivers and Repeaters Meeting the EIA RS-485 Interface Standard
AN-457: High Speed, Low Skew RS-422 Drivers and Receivers Solve Critical System Timing Problems
AN-694: A DMOS 3A, 55V, H-Bridge: The LMD18200
AN-759: Comparing EIA-485 and EIA-422-A Line Drivers and Receivers in Multipoint Applications
AN-805: Calculating Power Dissipation for Differential Line Drivers
AN-806: Data Transmission Lines and Their Characteristics
AN-807: Reflections: Computations and Waveforms
AN-808: Long Transmission LInes and Data Signal Quality
AN-828: Increasing the High Speed Torque of Bipolar Stepper Motors
AN-847: FAILSAFE Biasing of Differential Buses
AN-903: A Comparison of Differential Termination Techniques
AN-916: A Practical Guide to Cable Selection
AN-972: Inter-Operation of Interface Standards
AN-979: The Practical Limits of RS-485
AN-1031: TIA/EIA-422-B Overview
AN-1057: Ten Ways to Bulletproof RS-485 Interfaces
DP8390D/NS32490D: Network Interface Controller
DS1489/DS1489A: Quad Line Receiver
DS26LS31C/DS26LS31M: Quad High Speed Differential Line Driver
DS26LS32{C/MA/C}/DS26LS33{C/M/AC}: Quad Differential Line Receivers
DS36277: Dominant Mode Multipoint Transceiver
DS3695/DS3696/DS3697: Multipoint RS485/RS422 Transceivers/Repeaters
DS8921/DS8921A/DS8921AT: Differential Line Driver and Receiver Pair
DS96172/DS96174: Quad RS-422/RS-485 Differential Line Drivers
DS96173/DS96175: Quad RS-422/RS-485 Differential Line Receivers
DS96176: Dual RS-422 Transceiver in 8-pin DIP
DS96177: RS-485/RS-422 Differential Bus Repeater
LM117/LM317/LM317A: 3-Terminal Adjustable Regulator
LM124/LM224/LM324/LM2902: Low Power Quad Operational Amplifiers
LM1117: 800mA Low Dropout Linear Regulator
LM139/LM239/LM339/LM2901/LM3302: Low Power Low Offset Voltage Quad Comparators
LM1458/LM1558: Dual Operation Amplifier
LM1575/LM2575/LM2575HV: SIMPLE SWITCHER^® 1A Step-Down Voltage Regulator
LM2595: SIMPLE SWITCHER^® Power Convert 150kHz 1A Step-Down Voltage Regulator
LM2598: SIMPLE SWITCHER^® Power Convert 150 KHz 1A Step-Down Voltage Regulator, with Features
LM2672: SIMPLE SWITCHER^® Power Converter High Efficiency 1A Step-Down Voltage Regulator with Features
LM2675: SIMPLE SWITCHER^® Power Converter High Efficiency 1A Step-Down Voltage Regulator
LM2940/LM2940C: 1A Low Dropout Regulator
LM317L: 3-Terminal Adjustable Regulator
LM119/LM219/LM319: Dual Comparator
LM341/LM78Mxx Series: 3-Terminal Positive Voltage Regulators
LM148/LM248/LM348/LM149: Quad 741 Op Amps
LM741: xxx
LM78xx Series: Voltage Regulators
LM78S40: Universal Switching Regulator Subsystem (also see Motorola AN920.)
LM79xx Series: 3-Teriminal Negative Regulators
LMD18200: 3A, 55V H-Bridge
LMD18201: 3A, 55V H-Bridge
LMD18245: 3A, 55V DMOS Full-Bridge Motor Driver