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STMicroelectronics STA311BTR — DC-DC Power Modules

STA311BTR Fully Integrated Processor, 8-Channel Pre-Amp

MPNSTA311BTR
End of Life

STMicroelectronics STA311BTR Fully Integrated Processor, 8-Channel Pre-Amplifier, I²C, I²S Interface, 3V ~ 3.6V Supply, -40°C ~ 125°C, 56-VFQFPN (8x8), Tape & Reel.

$9.2Ref. price · indicative, final on quote
STMicroelectronics STA311BTR datasheet (PDF)
Packaging56-VFQFN Exposed Pad
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STA311BTR specifications
ParameterValue
MountingSurface Mount
Voltage3V ~ 3.6V
InterfaceI²C, I²S
Operating temperature-40°C ~ 125°C (TJ)
PackageTape & Reel (TR); Cut Tape (CT)
FunctionFully Integrated Processor
ApplicationsPre-Amplifier
Case56-VFQFN Exposed Pad
SpecificationsFull Flexible Amplification
Channels8

Product details

The STMicroelectronics STA311BTR is a fully integrated processor designed for pre-amplifier stages in multi-channel audio systems. It handles source selection, volume control, tone shaping, and signal routing across eight analog input channels, all managed through an I²C control bus. This part targets automotive infotainment head units, home theater receivers, soundbars, and professional mixing consoles where a single-chip analog front-end simplifies the BOM and board layout.

The industrial temperature range is -40°C to 125°C.

Lifecycle and sourcing — active, no LTB pressure

ROHS3 compliance covers the latest EU substance restrictions, so the part ships globally without exemption paperwork.

Frequently asked questions

Can the STA311BTR replace the older STA311B directly?

The STA311BTR is the Tape & Reel variant of the STA311B. The suffix 'TR' indicates the packaging format — the silicon and function are identical. If your existing design uses the STA311B in a different reel or tube format, verify the reel orientation and leader length for your pick-and-place feeder. Otherwise, it is a drop-in replacement.

Does the STA311BTR require an external DAC for audio output?

No. The STA311BTR is a fully integrated processor that handles analog audio routing and pre-amplification directly. It accepts analog inputs on its eight channels and outputs a conditioned analog signal — no external DAC is needed for the pre-amp stage. If you are feeding a digital power amplifier, the I²S output can connect directly to the amp's digital input.

How does the STA311BTR compare to the TAS5754M audio processor?

The STA311BTR is a pre-amplifier processor with eight analog input channels, I²C control, and I²S output. The TAS5754M is a digital-input power amplifier with integrated Class-D output stages. The STA311BTR handles signal routing and gain before the power amp; the TAS5754M takes a digital audio stream and drives speakers directly. They are complementary — not direct substitutes. A typical chain would use the STA311BTR for source selection and volume control, then feed the TAS5754M for final amplification.