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Texas Instruments LMH6643MMX — Logic ICs

Texas Instruments LMH6643MMX Dual Voltage Feedback Op-Amp

MPNLMH6643MMX
End of Life

Texas Instruments LMH® series LMH6643MMX, dual voltage feedback op-amp, 135 V/µs slew rate, 130 MHz -3dB bandwidth, rail-to-rail output, 8-VSSOP package.

$1.0Ref. price · indicative, final on quote
Packaging8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
StockContact for availability
MOQ1 pcs
  • 100% new & originalTraceable channels only — no refurbs, no pulls, no remarked parts.
  • Date & lot codes on quoteStated per line before you commit; label photos on request.
  • MSL-compliant ESD packingMoisture-sealed bags with indicator cards; reels photo-verified.
  • PayPal buyer protectionPay by T/T, PayPal or Payoneer — card payments covered end to end.

Specifications

LMH6643MMX Technical Specifications
ParameterValue
SeriesLMH®
Output typeRail-to-Rail
Mounting typeSurface Mount
Amplifier typeVoltage Feedback
Voltage - input offset1 mV
Voltage - supply span12.8 V
Current - supply2.7mA (x2 Channels)
Current - input bias1.6 µA
Current - output (Channel)75 mA
Operating temperature-40°C ~ 85°C
-3db bandwidth130 MHz
PackageBulk
Slew rate135V/µs
Case8-TSSOP, 8-MSOP (0.118\", 3.00mm Width)
Number of circuits2

Product details

Dual high-speed op-amp for bandwidth-limited signal chains

Each channel draws 2.7 mA quiescent current, keeping the total power budget under 8 mW per amplifier at 3 V.

At 135 V/µs, this part slews a 5 Vpp output in about 37 ns, cleanly passing composite video (NTSC/PAL) and high-speed pulse trains without slew-induced distortion. For a 10-bit ADC sampling at 20 MSPS, the full-power bandwidth clears the third Nyquist zone — something a general-purpose 5 V/µs op-amp cannot touch. The trade-off: 1.6 µA input bias current and 1 mV input offset voltage are higher than CMOS-input precision amps, so DC-coupled high-gain stages need offset trimming or accept the error.

Package and footprint notes

Supplied in an 8-VSSOP (3.00 mm width MSOP) — a compact footprint for dense mixed-signal boards. The surface-mount package is MSL 1 out of the bag per the LMH® series typical rating; no bake needed before reflow if the moisture barrier pouch is intact. The bulk shipping medium means parts come loose in a bag, not on tape — plan for manual pick-and-place or tube feeding if your line is set up for reels.

Frequently asked questions

What are the alternatives to LMH6643MMX?

For a lower-speed, lower-power dual op-amp with wider temperature range, the TLV9362IDDFR (10.6 MHz, 25 V/µs, 2.6 mA per channel, -40°C to 125°C) is a functional alternative. For a single-channel part with higher bandwidth, the THS4215 (350 MHz, 970 V/µs) handles faster signals but at higher supply current. Neither is pin-compatible; the LMH6643MMX sits in the 135 V/µs performance tier with no exact second-source.

Is LMH6643MMX rail-to-rail?

Yes, the output type is rail-to-rail. The input common-mode range is not rail-to-rail — it extends to 1.1 V below the positive rail in typical operation, so it cannot sense at the top rail in single-supply configurations. The output swings cleanly to within tens of millivolts of both rails under light load.