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250-mA high-speed buffer - see BUF634A for upgraded version


Package | PIN: SOIC (D) | 8
Temp: Q (-40 to 125)
Carrier: Partial Tube
Qty Price
1-9 $10.03
10-24 $9.02
25-99 $8.43
100-249 $7.56
250-499 $7.05
500-749 $6.14
750-999 $5.31
1000+ $5.20


  • A newer version of this device is now available: BUF634A
  • High output current: 250 mA
  • Slew rate: 2000 V/µs
  • Pin-selected bandwidth: 30 MHz to 180 MHz
  • Low quiescent current: 1.5 mA (30 MHz BW)
  • Wide supply range: ±2.25 to ±18 V
  • Internal current limit
  • Thermal shutdown protection
  • 8-pin PDIP, SOIC-8, 5-lead TO-220, 5-lead DDPAK-TO-263 surface-mount

All trademarks are the property of their respective owners.

Texas Instruments  BUF634U

The BUF634 is a high speed, unity-gain open-loop buffer recommended for a wide range ofapplications. The BUF634 can be used inside the feedback loop of op amps to increase outputcurrent, eliminate thermal feedback, and improve capacitive load drive.

For low power applications, the BUF634 operates on 1.5-mA quiescent current with 250-mAoutput,
2000-V/µs slew rate, and 30-MHz bandwidth. Bandwidth can be adjusted from 30 MHz to 180 MHzby connecting a resistor between V– and the BW Pin.

Output circuitry is fully protected by internal current limit and thermal shut-down,making the device rugged and easy to use.

The BUF634 is available in a variety of packages to suit mechanical and power dissipationrequirements. Types include 8-pin PDIP, SOIC-8 surface-mount, 5-lead TO-220, and a 5-leadDDPAK-TO-263 surface-mount plastic power package.

The upgraded device, BUF634Aoffers a wider bandwidth (210 MHz) and a higher slew rate (3750 V/µs) at 40% lowerquiescent current. See the Device Comparison Table for a selection ofunity-gain, open-loop buffers from Texas Instruments.