My Inquiry
My Account
STMicroelectronics STG3157CTR
- Part No.:
- STG3157CTR
- Manufacturer:
- STMicroelectronics
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
STG3157CTR.pdf
- Description:
- IC SWITCH SPDTX1 15OHM SOT323-6L
- Quantity:
- Payment:
- Shipping:
Inventory:24,913
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
STG3157CTR from STMicroelectronics is a high-speed CMOS SPDT analog switch with break-before-make timing, designed for signal routing in portable and low-voltage systems. It operates from 1.65 V to 5.5 V, delivers <0.3 ns propagation delay at 4.5 V, achieves ≤7 Ω on-resistance at 4.5 V/85 °C, and consumes ≤1 μA quiescent current - enabling battery-powered USB 2.0 data switching and audio path selection.
For engineers reviewing the STG3157CTR datasheet, STG3157CTR pinout, STG3157CTR application, or STG3157CTR equivalent, key selection criteria include verified break-before-make delay (0.5 ns), channel-to-channel crosstalk (-54 dB at 10 MHz), off-isolation (-57 dB), 250 MHz -3 dB bandwidth, and SOT323-6L package compatibility with space-constrained PCB layouts.
Technical Context
The STG3157CTR implements a silicon-gate CMOS SPDT switch architecture with TTL-compatible control input (VIH = 2 V min at VCC = 2.7–3.6 V) and dual independent channel control logic: IN high enables S1→D path while disabling S2→D, and IN low enables S2→D while disabling S1→D. Its break-before-make timing prevents signal shorting during state transitions.
It features integrated ESD protection on all pins (exceeding JESD17 latch-up >150 mA), rail-to-rail analog signal handling (VO = 0 to VCC), and guaranteed operation across -55 °C to +125 °C. The device maintains <9 Ω RON at 3.0 V supply and exhibits flat on-resistance (<3 Ω variation over full voltage range at 5 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 5.5 V single supply - supports Li-ion, 3.3 V, and 5 V system rails without level shifting |
| tPD (max) | 0.3 ns at VCC = 4.5 V - enables sub-nanosecond signal routing for USB 2.0 and high-speed audio |
| RON (max) | 7 Ω at VCC = 4.5 V, TA = 85 °C - minimizes insertion loss and distortion in analog paths |
| OIRR | -57 dB at f = 10 MHz - ensures strong channel isolation in multiplexed sensor or audio applications |
| Q (Charge injection) | 23 pC at VCC = 5 V - limits glitch amplitude in precision ADC/DAC interface switching |
| ICC (max) | 1 μA at TA = 85 °C - extends battery life in always-on wearable and IoT edge nodes |
| Break-before-make | 0.5 ns - guarantees no overlap between S1 and S2 conduction, preventing signal contention |
| Bandwidth | 250 MHz (-3 dB) - supports video, RF front-end, and wideband instrumentation signal paths |
Pinout & Package
SOT323-6L: ultra-compact 6-pin surface-mount package (2.2 mm × 1.35 mm × 1.1 mm), lead-free and RoHS-compliant, optimized for high-density portable PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3 | S1, S2 | Independent source inputs - routed to common D port based on IN logic state; bidirectional analog signal paths |
| 4 | D | Common drain/output port - connects to MCU ADC input, codec line-in, or USB transceiver data line |
| 6 | IN | CMOS/TTL-compatible digital control - direct drive from GPIO or logic gate without pull-ups or level shifters |
| 5 | VCC | Single positive supply - powers internal switch matrix and input buffer; decoupling required within 2 mm |
| 2 | GND | Analog/digital ground reference - shared return path for all channels; must connect to low-impedance ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Break-before-make timing | Guaranteed 0.5 ns delay prevents momentary short-circuit between S1 and S2 during switching |
| Ultra-low ICC | ≤1 μA max at 85 °C enables always-on signal routing in energy-harvesting and coin-cell devices |
| Low RON flatness | ≤3 Ω variation over 0–VCC range at 5 V - ensures consistent gain and THD across signal swing |
| High ESD immunity | Latch-up robustness >150 mA per JESD17 - survives handling and board-level transient events |
| TTL threshold compatibility | VIH = 2 V min at 2.7–3.6 V VCC - interoperates directly with 3.3 V microcontrollers and FPGAs |
Applications
| USB 2.0 Data Switching | Portable Audio Multiplexing |
|---|---|
Use Scenario: Dynamic selection between two USB peripheral sources (e.g., camera and keyboard) sharing one host controller port in handheld diagnostic equipment. IC Role / Device Role / Timing Role: SPDT analog switch providing break-before-make signal routing of D+ and D− differential pairs. Use Value: 0.3 ns tPD and 250 MHz bandwidth preserve USB 2.0 eye diagram integrity; 7 Ω RON minimizes impedance mismatch-induced reflections. |
Use Scenario: Routing microphone or line-in signals from multiple sensors (ECG, SpO₂, ambient noise) to a shared ADC in wearable health monitors. IC Role / Device Role / Timing Role: Low-distortion analog multiplexer enabling sequential sampling without cross-talk contamination. Use Value: -54 dB crosstalk and -57 dB off-isolation prevent signal bleed between biometric channels; 23 pC charge injection avoids ADC offset errors. |
| Industrial Sensor Signal Conditioning | Low-Power IoT Edge Node |
Use Scenario: Selecting among four temperature, pressure, and humidity sensor outputs using cascaded STG3157CTR devices in programmable logic controllers. IC Role / Device Role / Timing Role: Precision analog switch with rail-to-rail operation and stable RON across 1.65–5.5 V supply range. Use Value: ≤9 Ω RON at 3.0 V ensures minimal gain error in 16-bit sensor front-ends; wide VCC range simplifies power domain consolidation. |
Use Scenario: Enabling/disabling sensor bias paths and communication interfaces (BLE, LoRa) in battery-operated environmental sensors deployed for 10+ years. IC Role / Device Role / Timing Role: Ultra-low-power signal gate controlling analog sensor excitation and digital I/O routing. Use Value: 1 μA ICC at 85 °C reduces standby current budget by >95% vs. standard analog switches; SOT323-6L footprint saves >40% board area. |
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 TS3A227E | Higher RON (12 Ω typ at 3.3 V), no break-before-make guarantee, 1.65–3.6 V only | Not suitable for 5 V systems or timing-critical USB/audio; requires external timing control | Prefer STG3157CTR where 5 V operation, sub-ns timing, or guaranteed break-before-make is required |
| Analog Devices ADG719BRM | Lower bandwidth (100 MHz), higher charge injection (35 pC), SOT23-6 package | Acceptable for DC/low-frequency sensor mux but degrades high-speed signal fidelity and ADC accuracy | Choose STG3157CTR for >100 MHz signal paths or precision data acquisition requiring <25 pC charge injection |
Compared with TS3A227E and ADG719BRM, the STG3157CTR uniquely combines 5 V tolerance, guaranteed 0.5 ns break-before-make, 250 MHz bandwidth, and 1 μA ICC - making it the only option qualified for simultaneous high-speed, low-power, and wide-supply analog switching in portable medical and industrial edge devices.
Availability
STG3157CTR is available at Aetrix Electronics and suitable for USB 2.0 interface routing, portable audio multiplexing, and industrial sensor signal conditioning requiring stable component supply across automotive-grade temperature ranges and long-lifecycle production programs.
Supply support for STG3157CTR 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, specializing in smart power, analog, MEMS, and microcontroller technologies for industrial, automotive, and consumer markets.
The STG3157CTR belongs to ST's high-speed analog switch product line, engineered specifically for low-voltage, low-power, and high-fidelity signal routing in space-constrained portable and IoT applications.
FAQ
What is the maximum operating temperature range for the STG3157CTR?
The STG3157CTR is fully specified from -55 °C to +125 °C, with all electrical parameters (including RON, tPD, and OIRR) guaranteed across this extended industrial temperature range. This enables deployment in under-hood automotive modules, outdoor industrial sensors, and high-reliability medical equipment without derating.
Does the STG3157CTR support bidirectional analog signal flow?
Yes - the STG3157CTR is a fully bidirectional analog switch: signals pass equally well from S1/S2 to D or from D to S1/S2. Its symmetrical CMOS structure and rail-to-rail voltage handling (0 V to VCC on all ports) ensure matched performance in either direction, critical for sensor excitation and feedback paths.
Is external decoupling required for stable operation?
Yes - a 100 nF ceramic capacitor placed within 2 mm of the VCC (pin 5) and GND (pin 2) terminals is mandatory to suppress supply transients caused by fast switching (tPD < 0.3 ns). Without proper local decoupling, propagation delay variation and increased crosstalk may occur, especially at 4.5–5.5 V operation.
Can the STG3157CTR be used in 5 V logic-controlled systems?
Yes - the IN control pin accepts TTL/CMOS logic levels up to 5.5 V, and the device operates reliably at VCC = 5.5 V. VIH is guaranteed ≥2 V at VCC = 2.7–3.6 V, and the input structure tolerates 0–5.5 V regardless of VCC, allowing direct interfacing with 5 V microcontrollers even when VCC = 3.3 V.
STG3157CTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Switch Circuit:
- SPDT
- Multiplexer/Demultiplexer Circuit:
- 2:1
- Number of Circuits:
- 1
- On-State Resistance (Max):
- 15Ohm
- Channel-to-Channel Matching (ΔRon):
- 100mOhm
- Voltage - Supply, Single (V+):
- 1.65V ~ 4.3V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- 15ns, 10ns
- -3db Bandwidth:
- 250MHz
- Charge Injection:
- 23pC
- Channel Capacitance (CS(off), CD(off)):
- 5pF
- Current - Leakage (IS(off)) (Max):
- 100nA
- Crosstalk:
- -55dB @ 10MHz
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323-6L
STG3157CTR FAQ
1.How can I place an order for STG3157CTR through Aetrix?
Please submit a Request for Quotation (RFQ) for STG3157CTR 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 STG3157CTR reliable?
The price and inventory of STG3157CTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STG3157CTR is usually 5 days.
3.What payment methods are accepted for STG3157CTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STG3157CTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STG3157CTR?
STG3157CTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STG3157CTR 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 STG3157CTR?
For technical support, including STG3157CTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STG3157CTR requirements.
6.How does Aetrix verify that STG3157CTR is sourced from the original manufacturer or authorized distributors?
All STG3157CTR 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 STG3157CTR meets industry standards.
7.What is the process for return or replacement of STG3157CTR?
All STG3157CTR units undergo pre-shipment inspection (PSI). If there is an issue with STG3157CTR, 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 STG3157CTR part is unused and in its original packaging.
Return procedure for STG3157CTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STG3157CTR Tags
-
SN74LVC1G3157DBVR
Texas Instruments
-
SN74LVC1G66DBVR
Texas Instruments
-
SN74LVC1G66DCKR
Texas Instruments
-
SN74LVC1G3157DSFR
Texas Instruments
-
1P1G3157QDCKRQ1
Texas Instruments
-
SN74LVC2G66DCUR
Texas Instruments
-
SN74LV4052APWR
Texas Instruments
-
74HC4051D,653
Nexperia USA Inc.
-
SN74LV4051APWR
Texas Instruments
-
CD74HC4052PWR
Texas Instruments
-
CD74HC4051PWR
Texas Instruments
-
TS5A3166DBVR
Texas Instruments
Tech Hub
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
