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STMicroelectronics STG3155DTR
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- Part No.:
- STG3155DTR
- Manufacturer:
- STMicroelectronics
- Package:
- 6-UFDFN
- Datasheet:
-
STG3155DTR.pdf
- Description:
- IC SWITCH SPDT X 1 600MOHM 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:10,472
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Product details
Overview
STG3155DTR from STMicroelectronics is a high-speed, low-voltage CMOS single-pole double-throw (SPDT) analog switch with break-before-make timing, 0.5Ω typical ON-resistance at 4.3V, 1.5ns propagation delay, and 1.65V–4.3V single-supply operation-designed for signal routing in portable audio, battery-powered sensor interfaces, and USB 2.0 data path switching.
For engineers reviewing the STG3155DTR datasheet, STG3155DTR pinout, STG3155DTR application, or STG3155DTR equivalent, key selection criteria include guaranteed break-before-make delay (≤28ns), ultra-low quiescent current (≤0.2µA at 85°C), 4.3V-tolerant control inputs at 2.3–3.0V supply, and DFN6L package thermal performance for space-constrained PCB layouts.
Technical Context
The STG3155DTR implements a silicon gate C2MOS SPDT switch architecture with independent S1/S2 channels and a single SEL control input that determines conduction path: SEL = HIGH connects S1 to common D; SEL = LOW connects S2 to D. Its break-before-make behavior prevents signal shorting during state transitions.
It operates across 1.65V–4.3V VCC with rail-to-rail analog signal handling (0V to VCC), exhibits <0.30Ω RON flatness over full signal range at 4.3V, and delivers –74dB off-isolation and –72dB crosstalk at 100kHz-enabling high-fidelity signal integrity in multiplexed audio and precision ADC front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ON Resistance (RON) | 0.5Ω max at VCC = 4.3V, TA = 25°C - enables <10mV voltage drop at 200mA load, critical for low-loss sensor signal routing |
| Propagation Delay (tPD) | 1.5ns typ. at VCC = 3.0V - supports >300MHz digital control timing for real-time channel switching |
| Break-Before-Make Delay | 4ns min. at VCC = 4.3V - ensures no overlap between S1-D and S2-D conduction, preventing signal contention |
| Supply Current (ICC) | 0.2µA max at TA = 85°C - extends battery life in always-on wearable devices by minimizing standby power |
| Analog Bandwidth | 70MHz at RL = 50Ω - preserves signal fidelity up to video baseband frequencies in portable display interfaces |
| Off Isolation (OIRR) | –74dB at f = 100kHz - suppresses leakage from inactive channel, essential for multi-sensor ADC multiplexing |
| ESD Rating | HBM >2kV on analog channels vs. GND - eliminates need for external ESD protection in handheld device I/O stages |
Pinout & Package
STG3155DTR uses a 6-pin DFN6L package (1.45mm × 1.0mm, 0.5mm pitch) with exposed thermal pad for enhanced power dissipation in compact layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SEL) | Digital Control Input | Active-HIGH logic selects S1→D path; 4.3V-tolerant and 1.8V-compatible threshold enables mixed-voltage system interfacing |
| 2 (VCC) | Positive Supply Rail | Single 1.65–4.3V supply powers both analog and digital sections-no separate AVDD/DVDD required |
| 3 (D) | Common Analog Port | Shared connection point for bidirectional analog signals; supports rail-to-rail voltage swing (0V to VCC) |
| 4 (S2) | Secondary Analog Channel | Connects to D when SEL = LOW; matched RON and capacitance to S1 ensures symmetric channel performance |
| 5 (GND) | Ground Reference | Low-impedance return path for analog and digital currents; ties to thermal pad for thermal stability |
| 6 (S1) | Primary Analog Channel | Connects to D when SEL = HIGH; specified RON flatness ≤0.30Ω ensures minimal distortion across full signal range |
Key Features
| Feature | Design Value |
|---|---|
| Break-Before-Make Switching | Guaranteed 4ns minimum dead time prevents momentary short-circuit between S1 and S2 during transition |
| Rail-to-Rail Analog Operation | Supports 0V to VCC signal swing without distortion-enables direct interface with Li-ion battery-powered sensors |
| Ultra-Low Charge Injection | 53pC max at VCC = 4.3V-minimizes transient glitches in precision sampling circuits and ADC front-ends |
| Low ON-Resistance Flatness | 0.25Ω max variation across full analog range at 4.3V-ensures consistent gain and linearity in audio paths |
| High Off-Isolation | –74dB at 100kHz-reduces crosstalk between multiplexed sensor channels in medical diagnostic equipment |
Applications
| Portable Audio Signal Routing | USB 2.0 Data Path Switching |
|---|---|
|
Use Scenario: Selecting between stereo headphone output and mono speaker output in Bluetooth earbuds. IC Role / Device Role / Timing Role: SPDT analog switch routing audio DAC output to either transducer path with sub-30ns break-before-make timing. Use Value: 0.5Ω RON minimizes insertion loss (<0.05dB), while –72dB crosstalk prevents audible bleed between left/right channels. |
Use Scenario: Sharing a single USB 2.0 PHY between host and peripheral modes in dual-role OTG devices. IC Role / Device Role / Timing Role: Bidirectional 480Mbps data path selector controlled by system mode signal, operating at 3.3V supply. Use Value: 70MHz bandwidth exceeds USB 2.0 fundamental (240MHz), and 1.5ns tPD ensures timing margin for packet arbitration. |
| Battery-Powered Sensor Multiplexing | Medical Instrument Front-End |
|
Use Scenario: Scanning four temperature/pressure sensor outputs into a single SAR ADC in handheld diagnostic tools. IC Role / Device Role / Timing Role: Low-leakage (±20nA OFF-state) analog multiplexer enabling accurate DC-coupled measurements. Use Value: 0.2µA ICC at 85°C extends 10-year battery life; matched RON (±21mΩ) ensures consistent channel gain calibration. |
Use Scenario: Isolating ECG electrode inputs during lead-off detection and signal acquisition phases. IC Role / Device Role / Timing Role: High-isolation SPDT switch disconnecting unused electrodes to prevent noise coupling and patient leakage current. Use Value: –74dB off-isolation suppresses 50Hz mains interference; HBM >2kV ESD rating meets IEC 60601-1 patient safety requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPDT analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Texas Instruments TS5A23157DCKR | Higher RON (0.9Ω @ 3.3V), no break-before-make guarantee, 1.65–5.5V supply | Lacks timing-controlled switching-unsuitable for systems requiring guaranteed channel isolation during transition | Prefer when supply voltage flexibility > timing control; verify system-level short-circuit risk during switching |
| Analog Devices ADG849YRMZ-REEL7 | Lower RON (0.35Ω @ 3.3V), 1.8–5.5V supply, but only 10ns break-before-make min | Higher bandwidth (115MHz) but higher charge injection (120pC)-may degrade precision sampling accuracy | Prefer for high-frequency RF routing where bandwidth outweighs charge injection sensitivity |
Compared with TS5A23157DCKR and ADG849YRMZ-REEL7, STG3155DTR uniquely balances sub-30ns break-before-make timing, <0.6Ω RON, and <50pC charge injection-making it optimal for battery-powered medical and audio systems where signal integrity and power efficiency are co-constrained.
Availability
STG3155DTR is available at Aetrix Electronics and suitable for portable audio routing, USB OTG data path switching, and battery-powered sensor multiplexing requiring stable component supply across extended product lifecycles.
Supply support for STG3155DTR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, delivering automotive, industrial, and consumer ICs with emphasis on energy efficiency and reliability.
STG3155DTR belongs to ST's low-voltage analog switch product line, engineered specifically for ultra-low-power, high-fidelity signal routing in space- and battery-constrained portable electronics.
FAQ
What is the maximum allowable analog signal voltage range for STG3155DTR?
The STG3155DTR supports rail-to-rail analog signals from 0V to VCC. When VCC = 3.3V, the valid signal range is 0V to 3.3V; at VCC = 1.8V, it is 0V to 1.8V. Exceeding VCC on any analog pin violates absolute maximum ratings and risks latch-up or permanent damage.
Does STG3155DTR require external pull-up or pull-down resistors on the SEL pin?
No. The SEL input has CMOS-compatible thresholds (VIH = 0.65×VCC, VIL = 0.25×VCC) and internal protection diodes. It can be driven directly from 1.8V or 3.3V GPIO without external biasing-provided the driving source meets VIH/VIL specifications across temperature and voltage corners.
How does the DFN6L package affect thermal performance in continuous operation?
The DFN6L (1.45mm × 1.0mm) package features an exposed thermal pad soldered to PCB copper, enabling θJA ≈ 180°C/W. At 200mA load and 0.5Ω RON, power dissipation is 20mW-resulting in <4°C junction rise above ambient, making it suitable for sealed portable enclosures without forced airflow.
Can STG3155DTR be used in bidirectional analog signal paths?
Yes. STG3155DTR is fully bidirectional: analog signals may flow from D to S1/S2 or from S1/S2 to D with identical RON, bandwidth, and distortion characteristics. This enables flexible use in both multiplexer (S1/S2 → D) and demultiplexer (D → S1/S2) configurations.
STG3155DTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Switch Circuit:
- SPDT
- Multiplexer/Demultiplexer Circuit:
- 2:1
- Number of Circuits:
- 1
- On-State Resistance (Max):
- 600mOhm
- Channel-to-Channel Matching (ΔRon):
- 21mOhm
- Voltage - Supply, Single (V+):
- 1.65V ~ 4.3V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- 55ns, 30ns
- -3db Bandwidth:
- 70MHz
- Charge Injection:
- 53pC
- Channel Capacitance (CS(off), CD(off)):
- 6.6pF
- Current - Leakage (IS(off)) (Max):
- 20nA
- Crosstalk:
- -72dB @ 100kHz
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-DFN (1.45x1)
STG3155DTR FAQ
1.How can I place an order for STG3155DTR through Aetrix?
Please submit a Request for Quotation (RFQ) for STG3155DTR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for STG3155DTR reliable?
The price and inventory of STG3155DTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STG3155DTR is usually 5 days.
3.What payment methods are accepted for STG3155DTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STG3155DTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STG3155DTR?
STG3155DTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STG3155DTR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for STG3155DTR?
For technical support, including STG3155DTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STG3155DTR requirements.
6.How does Aetrix verify that STG3155DTR is sourced from the original manufacturer or authorized distributors?
All STG3155DTR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STG3155DTR meets industry standards.
7.What is the process for return or replacement of STG3155DTR?
All STG3155DTR units undergo pre-shipment inspection (PSI). If there is an issue with STG3155DTR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The STG3155DTR part is unused and in its original packaging.
Return procedure for STG3155DTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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