| nr | name | cat | description | manufacturer | 
| 250 | ADXL250 |  | The ADXL250(dual axis) accelerometers offer lower noise and superior signal to noise ratio over the ADXL50, data | AD | 
| 250 | AL250 | tv | NTSC*/PAL* to VGA | Averlogic* | 
| 250 | OP250 | amp | Dual* CMOS* Single-Supply Rail-to-Rail Input/Output Operational Amplifier, data | AD | 
| 2500 | SAA2500 | audio | MPEG audio decoder | Philips | 
| 2500 | SAA2500 | video | ISO/MPEG layer 1,2 audio source decoder | Philips | 
| 25008 | X25F008 | flash,spi | 1k*8 SPI serial Flash with block lock, Data | Xicor* | 
| 2501 | AT25C01 | eeprom,spi | 1Kbit EEPROM | Atmel | 
| 2501 | DS2501 | mem | UniqueWare Add-Only Memory, PS (54 Kb) | Dallas* | 
| 2501 | SAA2501 | video | Improved ISO/MPEG audio source decoder | Philips | 
| 2501 | TDA2501 | tv | PAL*/NTSC* encoder DIL16 | Philips | 
| 25010 | X25010 | eeprom,spi | 128*8 SPI serial EEPROM, | Xicor* | 
| 25016 | X25F016 | flash,spi | 2k*8 SPI serial Flash with block lock, Data | Xicor* | 
| 2502 | AT25C02 | eeprom,spi | 2Kbit EEPROM | Atmel | 
| 2502 | COM2502 | uart | UART | SMC, GI:AY5-1013, Signetics:2536, WD:TR1402 | 
| 2502 | DS2502 | mem | 1Kbit Add-Only Memory, PS (386 Kb) | Dallas* | 
| 2502 | DS2502-UNW | mem | UniqueWare Add-Only Memory, | Dallas* | 
| 2502 | SAA2502 | audio | Improved ISO/MPEG audio source decoder | Philips | 
| 2502 | X25C02 | eeprom,spi | 2Kbit EEPROM | Xicor | 
| 2502 | X25C02 | eeprom,spi | 256*8 SPI serial EEPROM, Data | Xicor* | 
| 2502 | x25c02 |  | 256*8 SPI Serial EEPROM, pinout | Xicor | 
| 25020 | X25020 | eeprom,spi | 2Kbit EEPROM | Xicor | 
| 25020 | X25020 | eeprom,spi | 256*8 SPI serial EEPROM with block lock, Data | Xicor* | 
| 25020 | x25020 |  | 256*8 SPI Serial EEPROM with Block Lock Protection, pinout | Xicor | 
| 25021 | X25021 | eeprom,spi | 256*8 SPI serial EEPROM with block lock, Data | Xicor* | 
| 25021 | x25021 |  | 256*8 SPI Serial EEPROM with Block Lock Protection, pinout | Xicor | 
| 25032 | X25F032 | flash,spi | 4k*8 SPI serial flash with block lock, Data | Xicor* | 
| 2504 | AT25C04 | eeprom,spi | 4Kbit EEPROM | Atmel | 
| 2504 | NM25C04 | eeprom,spi | 4Kbit EEPROM | NS | 
| 25040 | X25040 | eeprom,spi | 4Kbit EEPROM | Xicor | 
| 25040 | X25040 | eeprom,spi | 512*8 SPI serial EEPROM with block lock, Data | Xicor* | 
| 25040 | x25040 |  | 512*8 SPI Serial EEPROM with Block Lock Protection, pinout | Xicor | 
| 250401 | FM2504(0/1) | fram,spi | 4Kbit   FRAM | Ramtron | 
| 25041 | X25041 | eeprom,spi | 512*8 SPI serial EEPROM with block lock, Data | Xicor* | 
| 25041 | x25041 |  | 512*8 SPI Serial EEPROM with Block Lock Protection, pinout | Xicor | 
| 25043 | X25043 | eeprom,spi | 4Kbit EEPROM    with reset supervisor | Xicor | 
| 25043 | X25043 | eeprom,spi | 512*8 SPI serial EEPROM with programmable watchdog timer, Data | Xicor* | 
| 25043 | x25043 |  | 512*8 Programmable Watchdog Supervisory EEPROM, pinout | Xicor | 
| 2505 | DS2505 | mem | 16Kbit Add-Only Memory, PS (419 Kb) | Dallas* | 
| 2506 | DS2506 | mem | 64Kbit Add-Only Memory, PS (464 Kb) | Dallas* | 
| 2506 | TDA2506 | tv | SECAM* encoder DIL24 | Philips | 
| 25064 | X25F064 | flash,spi | 8k*8 SPI serial Flash with block lock, Data | Xicor* | 
| 2507 | TDA2507 | radio | FM* modulator controller DIL16 | Philips | 
| 2508 |  | eprom | 1k*8 NMOS* EPROM* | TI | 
| 25080 | X25080 | eeprom,spi | 8Kbit EEPROM | Xicor | 
| 25080 | X25080 | eeprom,spi | 1k*8 SPI serial EEPROM with block lock, Data | Xicor* | 
| 25080 | x25080 |  | 1k*8 SPI Serial EEPROM with Block Lock Protection, pinout | Xicor | 
| 2509 | 2509 |  | www.icst.com/pdf/2509.pdf | ICS* | 
| 251 | AL251 | tv | NTSC*/PAL* to VGA | Averlogic* | 
| 251 | MCS251 | mcu | MCU (=8051+) 1K*8 RAM, 16K*8 ROM, 16 Bit 80x51FX Prelim, DIP40 | Intel | 
| 2510 | 2510 |  | www.icst.com/pdf/2510.pdf | ICS* | 
| 2510 | MK2510 | clock,modem | 16 pin for AT&T 28.8 modems and Ethernet | MicroClock* | 
| 2510 | SAA2510 | video | Video-CD MPEG-Audio/Video decoder circuit | Philips | 
| 2511 | HM2511 |  | 1024 x 1  TTL SRAM*, pinout | Hitachi | 
| 25128 | X25128 | eeprom,spi | 128Kbit EEPROM | Xicor | 
| 25128 | X25128 | eeprom,spi | 16k*8 SPI serial EEPROM with block lock, Data | Xicor* | 
| 25128 | X25F128 | flash,spi | 16k*8 SPI serial Flash with block lock, Data | Xicor* | 
| 25128 | x25128 |  | 16k*8 SPI Serial EEPROM with Block Lock Protection, pinout | Xicor | 
| 2514 | TS2514 | consumer | The SmartPortTS2514 is a microcontroller based smart card interface solution that is designed to be quickly customized to unique and legacy smart card systems | Tritheim* | 
| 2516 |  | eprom | 2k*8 NMOS* EPROM* | TI | 
| 2516 | TMS2516 | eprom | 2k*8 EPROM* 450ns 5V | 
| 25160 | X25160 | eeprom,spi | 16Kbit EEPROM | Xicor | 
| 25160 | X25160 | eeprom,spi | 2k*8 SPI serial EEPROM with block lock, Data | Xicor* | 
| 25160 | x25160 |  | 2k*8 SPI Serial EEPROM with Block Lock Protection, pinout | Xicor | 
| 251601 | FM2516(0/1) | fram,spi | 16Kbit   FRAM | Ramtron | 
| 2518 | 2518 | shift | 32x6 SR* | 
| 2518 | TDA2518 | i2c | I2C chip | Philips* | 
| 2520 | SAA2520 | audio | Stereo filter codec | Philips | 
| 2521 | MK2521 | clock,modem | 16 pin for Rockwell 14.4 and 28.8 with DSVD or Ethernet | MicroClock* | 
| 2521 | SAA2521 | audio | Masking threshold processor | Philips | 
| 2525 | UC2525A |  | Regulating Pulse Width Modulator, pinout | Unitrode | 
| 2527 | UC2527A |  | Regulating Pulse Width Modulator, pinout | Unitrode | 
| 2530 | HCPL2530 |  | OptoIsolator, pinout | Texas Instruments | 
| 2530 | MK2530 | clock,modem | for new Rockwell 28.8/33.6kbps modems, DSVD, and sound. Has 50.6, 50.8, and 56.4 MHz output clocks. SO16 | MicroClock* | 
| 2531 | HCPL2531 |  | OptoIsolator, pinout | Texas Instruments | 
| 2531 | spr2531deb | led | led pin point indic red | Stanley | 
| 2532 |  | eprom | 4k*8 NMOS* EPROM* | Motorola, TI | 
| 2532 | 2532 |  | EPROM*, pinout | many | 
| 25320 | X25320 | eeprom,spi | 32Kbit EEPROM | Xicor | 
| 25320 | X25320 | eeprom,spi | 4k*8 SPI serial EEPROM with block lock, Data | Xicor* | 
| 25320 | x25320 |  | 4k*8 SPI Serial EEPROM with Block Lock Protection, pinout | Xicor | 
| 2536 | 2536 | uart | UART | Signetics, GI:AY5-1013, SMC:COM2502 | 
| 25401 | X25401 | eeprom,spi | 256bit NOVRAM | Xicor | 
| 25401 | X25401 | novram,spi | 16*16 SPI serial NOVRAM with AUTOSTORE, Data | Xicor* | 
| 25401 | x25401 |  | 16*16 SPI Serial AUTOSTORE NOVRAM, pinout | Xicor | 
| 25407 | TDA2540N7 | tv | 16 pins,     IF + AFC processor | 
| 2541 | MB2541 | driver | dual octal buffer/line drivers | Philips | 
| 2543 | MB2543 | xcvr | dual octal latched transceiver | Philips | 
| 2543 | TLC2543 | adc,spi | ADC, 12-bit 11-channel with internal oscillator and self-test | TI | 
| 2543 | TLC2543 | adc | 12 bit ADC 10us 11ch serial | TI | 
| 2545 | TDA2545A | audio | Quasi-split-sound circuit DIL16 | Philips | 
| 2546 | TDA2546A | audio | Quasi-split-sound circuit DIL8 | Philips | 
| 2549 | TDA2549 | tv | IF amplifier and demodulator for multistandard TV DIL14 | Philips | 
| 2552 | PML2552-35 | pl | CMOS* programmable macro logic (EPLD) | Philips | 
| 2552 | PML2552-50 | pl | CMOS* programmable macro logic (EPLD) | Philips | 
| 2555 | TDA2555 | tv | dual TV sound demodulator DIL18 | Philips | 
| 2556 | TDA2556 | audio | Quasi-split-sound circuit DIL24 | Philips | 
| 25564 | 2n5564 | fet | jfet matched pair n channel to71 | Siliconix | 
| 2557 | TDA2557 | tv,audio | dual TV sound demodulator DIL18 | Philips | 
| 256 | CTS256A-AL2 |  | CODE-TO-SPEECH-PROCESSOR (FOR SP0256), pinout | GENERAL INSTRUMENT | 
| 256 | CTS256A-AL2 | speech | text to speech controller $5, Ask Ashok Mahadevan <amahadev@oakland.edu> for more info More | GI | 
| 256 | SPO256-AL2 | speech | voice synthesizer, Ask Ashok Mahadevan <amahadev@oakland.edu> for more info More | GI | 
| 2560 | ISD2560_75_90_120 |  | Single-Chip Record/Playback Device, pinout | ChipCoder | 
| 2560 | MK2560 | clock,modem | Motorola modem clocks of 1.8432 and 36.864 MHz, zero ppm error. 8 pin SOIC | MicroClock* | 
| 2564 |  | eprom | 8k*8 EPROM*, pinout | TI | 
| 25640 | X25640 | eeprom,spi | 64Kbit EEPROM | Xicor | 
| 25640 | X25640 | eeprom,spi | 8k*8 SPI serial EEPROM with block lock, Data | Xicor* | 
| 25640 | x25640 |  | 8k*8 SPI Serial EEPROM with Block Lock Protection, pinout | Xicor | 
| 25642 | X25642 | eeprom,spi | 8k*8 SPI serial EEPROM with block lock, Data | Xicor* | 
| 25642 | x25642 |  | 8k*8 SPI Serial EEPROM with Block Lock Protection, pinout | Xicor | 
| 2569 |  | sensor | Touch/Proximity Memory Chip, | Dallas* | 
| 2572 | 2572 |  | www.icst.com/pdf/2572.pdf | ICS* | 
| 2575 |  | volt | Simple switcher 1 Amp* Step-Down Voltage Regulator, More | NS* | 
| 2575 | LM2575-ADJ | vreg | Simple Switcher reg to 1.5A, step-down, step-up possible, pos/neg, variable output voltage | order from Barend | 
| 2576 |  | ? | Buck regulator (=~2575) | NS* | 
| 2576 | LM2576-ADJ | vreg | Variable, 3A, same case (TO220-5 pins) | order from Barend | 
| 2576 | TDA2576 | tv | 16 pins,     Sync* proc | 
| 2577 |  | switch | Simple switcher | NS | 
| 2577 | TDA2577A | tv | TV sync circuit with veri. oscillator DIL18 | Philips | 
| 2578 | TDA2578A | tv | TV sync circuit with veri. oscillator DIL18 | Philips | 
| 2579 | TDA2579 | tv | 18 pins,     Sync* + Vrt + Hrz processor | 
| 2579 | TDA2579B | tv | Horizontal/vertical sync circuit DIL18 | Philips | 
| 2579 | TDA2579C | tv | Horizontal/vertical sync circuit DIL18 | Philips | 
| 258 | LM258 |  | Low Power Dual* Operational Amplifier, pinout | National Semiconductor | 
| 258 | LM258 | amp | dual low-power opamp DIL8 | Philips | 
| 2580 |  | amp | Low Noise Servo Preamplifier | NS | 
| 2582 | TDA2582 | tv | 16 pins,     Chopper ctrl + Stripper | 
| 2582 | TDA2582 | power | Control circuit for power supplies DIL16 | Philips | 
| 2582 | TDA2582Q | power | Control circuit for power supplies QIL16 | Philips | 
| 2585 | UDN2585 | driver | 7-bit 50V 500mA TTL-input PNP (high-side) darlington driver, pinout | 
| 2593 | TDA2593 | tv | Horizontal combination DIL16 | Philips | 
| 2595 | 2595 |  | www.icst.com/pdf/2595.pdf | ICS* | 
| 2595 | TDA2595 | tv | Horizontal combination DIL18 | Philips | 
| 2598 | TS2598 | consumer | The SmartPortTS2598 is a certified and low cost serial smart card interface solution for PCs, phones, PAs vending machines, cable boxes, and any other intelligent appliance | Tritheim* |