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BUF634U

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Texas Instruments Operational Amplifier, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentamplifiers-comparatorsbuf634ufactory-2.0.0extractor-text

Verified BUF634U

by Ray · last 5 Nov 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

5 Nov 2026RayPublished by the parts factory: tier mfr, 8 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: BUF634U · SOIC-8 · 8 pins
  • ✓copper: 8 copper pads, none touching another net
  • ✓datasheet: all 8 pin names found in the 40-page datasheet
  • ✓distributor: lcsc C4366746, digikey BUF634U-ND, mouser 595-BUF634U
  • ✓family: SOIC-8_3.9x4.9mm_P1.27mm
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-cjqnbmcq/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • •package_fit (skip): no component.package_dims on the page: the model is unchecked against the datasheet drawing
  • ✓pads: 8 pins = 8 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 8 pins agree
  • ✓symbol_text: no pin names collide
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ buf634u.kicad_sym✓ buf634u.kicad_mod✓ buf634u.step
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Ray Publish 0.1.0 d7d18b0 6d ago

BUF634U

Texas Instruments · Operational Amplifier · SOIC-8

BUF634U from Texas Instruments, in a SOIC-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 BW input Bandwidth adjust pin; a resistor connected between V- and BW sets the bandwidth from 30MHz to 180MHz.
2 NC unconnected No internal connection.
3 VIN power_in Signal input of the unity-gain open-loop buffer.
4 V- power_in Negative power supply; supply voltage is ±2.25 V to ±18 V, with VS = (V+) - (V-).
5 NC unconnected No internal connection.
6 VO output Output pin that delivers up to ±250-mA continuous output current, with internal current limit at approximately ±350 mA.
7 V+ power_in Positive power supply; supply voltage is ±2.25 V to ±18 V, with VS = (V+) - (V-).
8 NC unconnected No internal connection.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOIC-8
Category Amplifiers/Comparators
Pins 8

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Input offset voltage VOS 36 65 mV TA = 25℃ 7
Input offset voltage VOS 36 65 mV TA = 25℃ 8
Input bias current IB 0.25 2 µA VIN = 0 V 7
Input bias current IB 0.03 0.25 µA VIN = 0 V 8
Linear input voltage range -13 13 V RL = 1 kΩ, IB < 10 µA 7
Linear input voltage range -13 13 V RL = 1 kΩ, IB < 10 µA 8
Gain G 0.95 0.99 V/V VO = ±10 V, RL = 1 kΩ 7
Gain G 0.95 0.99 V/V VO = ±10 V, RL = 1 kΩ 8
Gain G 0.93 0.95 V/V VO = ±10 V, RL = 100 Ω 7
Gain G 0.93 0.95 V/V VO = ±10 V, RL = 100 Ω 8
Gain G 0.91 0.93 V/V VO = ±10 V, RL = 67 Ω 7
Gain G 0.91 0.93 V/V VO = ±10 V, RL = 67 Ω 8
Output headroom to supplies 1.6 1.8 V IO = ±10 mA 7
Output headroom to supplies 1.6 1.8 V IO = ±10 mA 8
Output headroom to supplies 2 2.2 V IO = ±100 mA 7
Output headroom to supplies 2 2.2 V IO = ±100 mA 8
Output headroom to supplies 2.2 2.5 V IO = ±150 mA 7
Output headroom to supplies 2.2 2.5 V IO = ±150 mA 8
Current output, continuous IO -250 250 mA 7
Current output, continuous IO -250 250 mA 8
Short-circuit current ISC 375 550 mA 7
Short-circuit current ISC 350 550 mA 8
Operating voltage range VS 2.25 18 V VS = ±2.25 V to ±18 V 7
Operating voltage range VS 2.25 18 V VS = ±2.25 V to ±18 V 8
Quiescent current IQ 8.5 12 mA IO = 0 mA 7
Quiescent current IQ 1.5 2.3 mA IO = 0 mA 8
Power-supply rejection ratio PSRR 64 75 dB VS = ±2.25 V to ±18 V 7
Power-supply rejection ratio PSRR 64 80 dB VS = ±2.25 V to ±18 V 8
Input offset voltage drift 175 µV/℃ TA = -40℃ to 125℃ 7
Input offset voltage drift 175 µV/℃ TA = -40℃ to 125℃ 8
Slew rate SR 3750 V/µs VO = 20-V step, VIN-SR = 4000 V/µs 7
Slew rate SR 3750 V/µs VO = 20-V step, VIN-SR = 4000 V/µs 8
Output impedance ZO 5 Ω DC, IO = 10 mA 7
Output impedance ZO 7 Ω DC, IO = 10 mA 8
Thermal shutdown temperature 180 ℃ 7
Thermal shutdown temperature 180 ℃ 8
Supply voltage 18 V 4
Operating temperature -40 125 °C 4
Junction temperature 150 °C 4
Lead temperature (soldering, 10 s) 300 °C 10 s 4
Storage temperature Tstg -55 125 °C 4
Supply voltage VS 2.25 15 18 V VS = (V+), (V-) 4
Operating temperature TA -40 25 85 °C 4
Junction-to-ambient thermal resistance RθJA 123 °C/W D (SOIC) 8 pins 4
Junction-to-case (top) thermal resistance RθJC(top) 55 °C/W D (SOIC) 8 pins 4
Junction-to-board thermal resistance RθJB 68 °C/W D (SOIC) 8 pins 4
Junction-to-top characterization parameter ψJT 12 °C/W D (SOIC) 8 pins 4
Junction-to-board characterization parameter ψJB 67 °C/W D (SOIC) 8 pins 4
Electrostatic discharge, HBM V(ESD) -2500 2500 V BUF634U in D (SOIC) package, human-body model per JS-001 4
Electrostatic discharge, CDM V(ESD) -1000 1000 V BUF634U in D (SOIC) package, charged-device model per JESD22-C101 4

CAD (KiCad official)

  • Symbol: BUF634U
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOIC-8 (KiCad packages3D, STEP)
  • 3D model files: buf634u-etched.step / buf634u-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); buf634u.step / buf634u.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Texas Instruments datasheet (40 pp, sha256 176bed1f5b021018, retrieved 2026-11-05, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF