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STMicroelectronics STG3820BJR
- Part No.:
- STG3820BJR
- Manufacturer:
- STMicroelectronics
- Package:
- 30-WFBGA, FCBGA
- Datasheet:
-
STG3820BJR.pdf
- Description:
- IC SW DPDTX4 5.8OHM FLIPCHIP 30
- Quantity:
- Payment:
- Shipping:
Inventory:4,503
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Product details
Overview
STG3820BJR from STMicroelectronics is a low-voltage, high-bandwidth quad DPDT analog switch fabricated in C2MOS technology, operating from 1.65 V to 4.3 V. It delivers 5.4 Ω ON-resistance at 4.3 V, 800 MHz bandwidth, and ultralow 1 µA quiescent current - enabling USB 2.0 high-speed (480 Mbps) signal routing in space-constrained mobile phones.
For engineers reviewing the STG3820BJR datasheet, STG3820BJR pinout, STG3820BJR application, or STG3820BJR equivalent, key selection criteria include its fail-safe overvoltage protection during power-off, break-before-make timing (4 ns min), and 4.3 V-tolerant/1.8 V-compatible control inputs for mixed-voltage system interfacing.
Technical Context
The STG3820BJR implements eight independent SPDT switch pairs (four DPDT units), each controlled by one of four SEL pins driving two switches in complementary states: SEL high connects S1 to D, SEL low connects S2 to D. Its fail-safe architecture maintains high-impedance isolation when VCC = 0 V, preventing signal leakage or damage during hot-insertion or power sequencing events.
All channels feature matched ON-resistance (ΔRON ≤ 0.3 Ω at 3.0 V), low charge injection (6.4 pC max), and tight channel-to-channel skew (26 ps), ensuring signal integrity for differential USB 2.0 data lanes and high-fidelity audio switching without crosstalk-induced distortion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.65 V to 4.3 V - supports single-supply operation across Li-ion battery discharge curve (3.0–4.2 V) and 1.8 V/3.3 V logic domains. |
| ON Resistance (RON) | 5.4 Ω at VCC = 4.3 V, TA = 25 °C - minimizes insertion loss and voltage drop for analog signals up to ±128 mA per channel. |
| Bandwidth (-3 dB) | 800 MHz at VCC = 3.0–4.3 V - enables full USB 2.0 high-speed (480 Mbps) data transmission with <130 ps total jitter. |
| Quiescent Current (ICC) | 1 µA max at TA = 85 °C - extends battery life in always-on mobile interface paths without compromising switching speed. |
| Break-Before-Make Delay | 4 ns min at VCC = 4.3 V - prevents momentary short-circuit between S1 and S2 during state transitions in bidirectional signal paths. |
| Off Isolation | -78 dB at 1 MHz, -57 dB at 10 MHz - suppresses interference between active and inactive channels in multi-source audio/video routing. |
| ESD Rating | 2000 V HBM (JESD22-A114-A) - protects I/O pins against electrostatic discharge during board handling and end-user operation. |
Pinout & Package
STG3820BJR uses a Flip Chip 30 package (2.0 × 2.4 × 0.625 mm, 0.4 mm pitch) with 30 solder bumps arranged in a 6×5 array. The package supports fine-pitch PCB assembly and provides low-inductance signal paths essential for RF and high-speed digital switching.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1, A3, B1, B3, D1, D3, E1, E3 | Independent Switch Input (S1/S2) | Eight dedicated analog input terminals - four S1 and four S2 ports per DPDT unit, enabling dual-path selection per channel. |
| A2, B2, D2, E2, A5, B5, D5, E5 | Common Switch Output (D1–D8) | Eight common output terminals - each serves as shared node for one DPDT pair, supporting bidirectional signal flow. |
| C1, C3, C4, C6 | Select Control Input (SEL1–2, SEL3–4, SEL5–6, SEL7–8) | Four logic-level inputs - each controls two complementary switches (e.g., SEL1-2 drives switches 1 & 2), reducing GPIO count. |
| C2 | Positive Supply (VCC) | Single supply rail - powers all internal circuitry and defines analog signal swing range (0 to VCC). |
| C5 | Ground Reference (GND) | Return path for supply and signal currents - must be low-impedance to maintain RON stability and noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Fail-safe overvoltage protection | Maintains high-impedance isolation on all switches when VCC = 0 V - prevents back-driving or latch-up during power-down sequences. |
| USB 2.0 high-speed compliance | Meets 480 Mbps timing requirements with 130 ps total jitter and 26 ps channel skew - validated for full-speed data lane switching. |
| Low ON-resistance flatness | 1.6 Ω max variation across 0–VCC analog range at 4.3 V - ensures consistent signal amplitude regardless of DC bias point. |
| 4.3 V-tolerant / 1.8 V-compatible control | Accepts 1.8 V logic high while powered from 2.3–3.0 V - eliminates level shifters in mixed-voltage mobile SoC interfaces. |
| Latch-up immunity | Exceeds 100 mA per JESD78 Class II - guarantees robust operation under transient overcurrent conditions in portable systems. |
Applications
| Mobile Phone Audio Routing | USB 2.0 Data Line Switching |
|---|---|
|
Use Scenario: Dynamic reconfiguration of headset, speaker, and microphone paths in smartphones with multiple audio codecs. IC Role / Device Role: Quad DPDT analog switch managing four independent bidirectional audio signal pairs. Use Value: Enables zero-crossing switching with <15 ns turn-on time and <14 ns turn-off time, eliminating audible pop/click artifacts. |
Use Scenario: Sharing a single USB 2.0 PHY between host and peripheral modes in dual-role OTG devices. IC Role / Device Role: High-bandwidth signal router isolating D+ and D− lines during mode transition. Use Value: Delivers 800 MHz bandwidth and -78 dB off-isolation at 1 MHz to preserve eye diagram integrity and meet USB-IF compliance. |
| Camera Module Interface Multiplexing | Portable Diagnostic Equipment Signal Path Selection |
|
Use Scenario: Selecting between front/rear cameras or switching between MIPI CSI-2 and parallel camera interfaces. IC Role / Device Role: Low-capacitance (6 pF enabled, 2 pF disabled) analog switch minimizing signal degradation on high-speed video lines. Use Value: Achieves 6 pF Sn port capacitance at 240 MHz - reduces rise-time degradation and maintains >100 MHz effective bandwidth for raw image data. |
Use Scenario: Routing sensor outputs (ECG, SpO₂, temperature) to ADC inputs in handheld medical monitors. IC Role / Device Role: Precision analog multiplexer with 0.3 Ω RON matching across channels and <20 nA OFF-leakage. Use Value: Ensures <0.01% gain error contribution and <1 µV offset shift across 8-channel scans, critical for clinical-grade accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TS5A3159DRYR | Single SPDT, 0.75 Ω RON at 3.3 V, 200 MHz bandwidth, SC70-6 package | Lower channel count and bandwidth - suitable only for baseband audio or low-speed data, not USB 2.0. | Choose when footprint and cost are prioritized over multi-channel integration and high-speed performance. |
| ADG732BRUZ | 32-channel CMOS mux, 4 Ω RON, 125 MHz bandwidth, TSSOP-48 package | Higher channel density but lower bandwidth and no fail-safe power-off protection. | Prefer for complex multi-signal routing in industrial test equipment where USB speed is irrelevant. |
Compared with TS5A3159DRYR and ADG732BRUZ, the STG3820BJR uniquely combines quad DPDT topology, 800 MHz bandwidth, fail-safe operation, and sub-1 µA quiescent current - making it irreplaceable for compact, battery-powered USB/audio co-routing in mobile platforms.
Availability
STG3820BJR is available at Aetrix Electronics and suitable for mobile phone design, USB OTG implementation, portable medical diagnostics, and high-fidelity audio routing requiring stable component supply across extended production lifecycles.
Supply support for STG3820BJR 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, designing and manufacturing microcontrollers, power ICs, sensors, and analog components for automotive, industrial, and consumer markets.
The STG3820 belongs to ST's high-speed analog switch product line, engineered specifically for low-voltage, high-bandwidth signal routing in battery-powered portable electronics where power efficiency, small footprint, and USB 2.0 compliance are mandatory.
FAQ
Does STG3820BJR support bidirectional signal flow?
Yes, all eight switch paths (S1/D and S2/D per DPDT unit) are fully bidirectional. The device has no intrinsic directionality - analog signals pass equally well from S1 to D or D to S1, provided voltage remains within 0 to VCC. This enables flexible use in both source-selection and load-switching configurations without signal inversion or added latency.
What is the maximum analog signal voltage that can be applied when VCC = 0 V?
When VCC = 0 V, the STG3820BJR enters fail-safe mode: all switches present high-impedance isolation (>1 GΩ) between S and D terminals, and analog inputs tolerate up to ±0.5 V beyond GND without damage or leakage. This allows safe hot-plug operation of USB or audio cables before system power-up.
How does the break-before-make timing prevent signal corruption?
The minimum 4 ns break-before-make delay ensures that one switch path (e.g., S1→D) fully opens before the complementary path (S2→D) closes. This eliminates momentary short-circuits between independent signal sources - critical for avoiding DC shorts in audio mixing or data-line contention in USB OTG mode switching.
Can STG3820BJR be used with 1.2 V logic control inputs?
No. The control inputs require VIH ≥ 0.65×VCC (min. 1.2 V at VCC = 2.3 V), and absolute VIH must reach at least 1.2 V for reliable high-state recognition. At VCC = 1.65 V, VIH(min) = 1.07 V; however, 1.2 V logic drivers may not guarantee margin under process/voltage/temperature variation. Use only with ≥1.65 V supply and compatible 1.8 V or higher logic families.
STG3820BJR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Switch Circuit:
- DPDT
- Multiplexer/Demultiplexer Circuit:
- 2:2
- Number of Circuits:
- 4
- On-State Resistance (Max):
- 5.8Ohm
- Channel-to-Channel Matching (ΔRon):
- 300mOhm
- Voltage - Supply, Single (V+):
- 1.65V ~ 4.3V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- 15ns, 13ns
- -3db Bandwidth:
- 800MHz
- Charge Injection:
- 6.4pC
- Channel Capacitance (CS(off), CD(off)):
- 2pF
- Current - Leakage (IS(off)) (Max):
- 20nA
- Crosstalk:
- -78dB @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- FlipChip 30
STG3820BJR FAQ
1.How can I place an order for STG3820BJR through Aetrix?
Please submit a Request for Quotation (RFQ) for STG3820BJR 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 STG3820BJR reliable?
The price and inventory of STG3820BJR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STG3820BJR is usually 5 days.
3.What payment methods are accepted for STG3820BJR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STG3820BJR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STG3820BJR?
STG3820BJR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STG3820BJR 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 STG3820BJR?
For technical support, including STG3820BJR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STG3820BJR requirements.
6.How does Aetrix verify that STG3820BJR is sourced from the original manufacturer or authorized distributors?
All STG3820BJR 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 STG3820BJR meets industry standards.
7.What is the process for return or replacement of STG3820BJR?
All STG3820BJR units undergo pre-shipment inspection (PSI). If there is an issue with STG3820BJR, 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 STG3820BJR part is unused and in its original packaging.
Return procedure for STG3820BJR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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