Buf03
Overview
Product sourcing insights & recommendations
The BUF03 is a high-speed monolithic voltage follower, originally manufactured by Analog Devices and now classified as obsolete Analog. While no longer in mass production, it remains a "cult classic" in the high-end audio community for its transparency and high slew rate (up to 300 V/µs) AnalogDiyaudio.
Market Analysis & Trends
- Legacy Status: The BUF03 is now primarily found through specialty distributors or the secondary market (B2B/eBay) for repairs and boutique DIY projects SierraicEbay.
- Industry Alternatives: Analog Devices recommends the AD811 as a modern replacement, while high-performance buffers like the BUF634 from Texas Instruments serve similar high-drive roles in current designs AnalogTi.
- Broad Market Context: The active electronic components market is projected to reach $500.93 billion by 2030, driven by miniaturization and AI integration, shifting away from legacy monolithic buffers toward more integrated System-on-Chip (SoC) solutions GrandviewresearchLinkedin.
I have compiled a list of available buffer ICs and related components found on B2B platforms in the deliverable below.
You can explore modern alternatives and market opportunities for high-speed buffers here:
Buf03 Buffer Ic
Products · Top picks & verified manufacturers
CY29940ACT 1 18 Clock Buffer LQFP-32 IC Chips
Shenzhen Kzsources Electronics Co., Ltd.🇨🇳CN7 yrs
IC Buffer, Non-Inverting 2 Element 4 Bit per Element 3-State Output 20-TSSOP SN74HC244QPWRG4Q1
Shenzhen Kaisheng Century Electronics Co., Ltd.verified🇨🇳CN3 yrs
NB3N121KMNG IC CLK BUFFER 1 21 400MHZ 52QFN 2026 New Original
IC BUFFER/DRIVER Interface BOM IC In Stock Wholesale Electronic Components 55501EFJ
Huibaina (Shenzhen) Industrial Co., Ltd.verified🇨🇳CN3 yrs
SY CHIPS SI5340B-D-GM Electronic Components Integrated Circuit RTC Real Time Clock Buffer IC Chip SI5340B-D-GM
Shenzhen Sy Chips Technology Co., Ltd.🇨🇳CN8 yrs
ADATE209BBCZ IC BUFFER -4.73V/6.65V 49-CSPBGA Brand New Original IC Chip In Stock
Zhiyucheng (shenzhen) Technology Co., Ltd.🇨🇳CN3 yrs
IC SN75477DR Logic Buffers Drivers Transceivers
Shenzhen Mygroup Electronics Limited🇨🇳CN10 yrs
74AUP2G07GM,115 IC BUFFER NON-INVERT 3.6V 6XSON
Shenzhen Yongdeli Electronics Co., Ltd.verified🇨🇳CN4 yrs
BOM IC In Stock BUF634P Chip IC BUFFER 1 CIRCUIT 8DIP 8 DIP (0.300", 7.62mm) Price List For Electronic Components
Components Electronic 8 SOlC BUF634U Chip BOM IC In Stock
Shenzhen Asia Ocean Electronics Co., Ltd.🇨🇳CN4 yrs
BUF634AIDR SOIC-8 210MHz, 250mA High Speed Buffer Chip
Shenzhen Dongjiang Chuangfu Technology Co., Ltd.🇨🇳CN1 yr
Integrated Circuits SY100EP11UZG IC CLK BUFFER 1:2 3GHZ 8SOIC hot sale
Shenzhen Ali Xin Chao Technology Co., Ltd.🇨🇳CN1 yr
BUF634AIDR SOIC-8 210MHz, 250mA High Speed Buffer Chip
100% brand new and high quality MC74HC368ADR2G IC BUFFER INVERT 6V 16SOIC
Shenzhen Yuzens Technologies Co. Ltd.🇨🇳CN12 yrs
Manufacturer Channel BUF634U/2K5 8 SOlC Chip Buy Online Electronic Components
Shenzhen Zhike Electronics Co., Ltd.🇨🇳CN4 yrs
Electronic Circuit Components 8 SOlC BUF634U/2K5 Chip BOM IC In Stock
Shenzhen Cico Technology Co., Ltd.🇨🇳CN10 yrs
Components Electronic Chip 8 SOlC BUF634U In Stock
Shenzhen Jiayousheng Electronics Co., Ltd.verified🇨🇳CN9 yrs
Authorized Distributor Chip 8 SOlC BUF634U/2K5 Electronic Chips Component
Shenzhen Wisdtech Technology Co., Ltd.🇨🇳CN4 yrs
Electronic Chips Component 8 SOlC BUF602ID Chip Original
Op Amps IC video buffer amplifier SXQ3 IC part BUF634U Integrated Circuit
Shenzhen Sinosky Electronics Co., Ltd.verified🇨🇳CN9 yrs
1pcs XY-017 UART Serial Port to RS485 Converter Board Module RS485 to TTL Converter Module SCM Automatic Flow Control Module
Shenzhen Bizon Tech Co., Ltd.🇨🇳CN10 yrsElectronic Circuit Components 8 SOlC BUF634U/2K5 Chip BOM IC In Stock
New Original CDCLVC1102PWR TSSOP-8 Clock Buffer IC Chip
Components Electronic Chip 8 SOlC BUF634U In Stock
Authorized Distributor Chip 8 SOlC BUF634U/2K5 Electronic Chips Component
Electronic Chips Component 8 SOlC BUF602ID Chip Original
Op Amps IC video buffer amplifier SXQ3 IC part BUF634U Integrated Circuit
SACOH High Quality Original IC Chips Suppliers USBUF01W6
ICMICRO In Stock New Original Integrated Circuit Electronic Component Suppliers KSZ8851-16MLLU-TR
1pcs XY-017 UART Serial Port to RS485 Converter Board Module RS485 to TTL Converter Module SCM Automatic Flow Control Module
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Sources & References
21 sources cited · Verified industry data & reports
BUF03 Datasheet and Product Info
Analog Devices
The BUF03 is the first very high-speed monolithic voltage follower. Featuring performance previously unobtainable in monolithic unit, it offers combination ...
Buf-03
diyAudio
I believe that it's now an obsolete part. One would need to find an old PMI (Precision Monolithics Incorporated) databook or an Analog Devices ...
Project files: BUF-03 revisited - theslowdiyer - WordPress.com
theslowdiyer
PSU connector has been uprated to a screw clamp type which is easier to work with. Also, there is now only one PSU entry instead of two. The ...
BUF-03 Datasheet(PDF) - Analog Devices
ALLDATASHEET.COM
Part #: BUF-03. Download. File Size: 1MbKbytes. Page: 7 Pages. Description: High-Speed Voltage Follwer/Buffer. Manufacturer: Analog Devices.
BUF-03 buffer IC and it's power supply PCB
thlaudio.com
The BUF-03 is the first very high-speed monolithic voltage follower. Featuring performance previously unobtainable in a monolithic unit.
1 Pieces BUF03BJ High Speed Voltage Follower/Buffer ...
eBay
Find many great new & used options and get the best deals for 1 Pieces BUF03BJ High Speed Voltage Follower/Buffer BUF03 at the best online prices at eBay!