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STMicroelectronics STA311BTR — DC-DC Power Modules
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RoHS Compliant · Lead-Free EIA-481 Standard
STMicroelectronics / DC-DC Power Modules

STA311BTR Fully Integrated Processor, 8-Channel Pre-Amp

MPN STA311BTR
End of Life Spot Stock · 24-48h Dispatch 100% Original Sealed

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.

In Stock: 1,996 pcs
MOQ: 1 pcs
Logistics: DHL / FedEx DAP (Global Express · 3-7d) Russia & CIS DDP (Door-to-Door Cleared)
Dispatch: Shenzhen / HK
Unit Price (USD)
$9.20 / pc
Direct Purchase Ready
Volume Pricing Breaks Confirmed upon quotation
1+ pcs
$9.20
10+ pcs
$8.28
30+ pcs
$7.54
100+ pcs
$6.81
500+ pcs
$6.35
1,000+ pcs
$5.98
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$9.20 / ea

1,996 in stock — maximum per order · 3–4 days lead time

$8.28 / ea from 10 pcs
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100% Original Sealed 45x Microscope QC 30-Day Warranty · COC USD T/T & PI · DAP/DDP
[SPEC] Essential Parameters Snapshot Full Specifications (10)
Package / Case 56-VFQFN Exposed Pad
Supply Voltage 3V ~ 3.6V

Full Technical Specifications

10 Parameters
STA311BTR specifications
Parameter / AttributeSpecification / Value
MountingSurface Mount
Supply 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
[DESK] Shenzhen Spot Allocation · 2h Response

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Factory lead times blocking production? We lock verified brand-new original stock in Shenzhen within 2 hours.

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[01] Emergency Shortage 24-48h Shenzhen Dispatch

Direct access to Shenzhen floor inventory, franchised allocation buffers, and factory bonded stock to resolve line-down shutdowns.

[02] Industrial Packaging Tape & Reel / Tray / Tube

Standard factory-sealed packaging compliant with EIA-481 standards for automated high-speed SMT pick-and-place lines.

[03] WhatsApp QC Proof 45x Microscope QC Photos

High-resolution photos of original reel labels, 2D DataMatrix, and pin coplanarity sent via WhatsApp/Telegram before you release wire payment.

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Technical Details & Description

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.

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