My Inquiry
My Account
Vishay Siliconix DG2749DN-T1-E4
- Part No.:
- DG2749DN-T1-E4
- Manufacturer:
- Vishay Siliconix
- Package:
- 8-UFQFN
- Datasheet:
-
DG2749DN-T1-E4.pdf
- Description:
- IC SWITCH SPST 600MOHM 8MINIQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,089
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
DG2749DN-T1-E4 from Vishay Siliconix is a dual SPST analog switch with break-before-make topology, designed for high-fidelity signal routing in low-voltage portable systems. It delivers 0.4 Ω typical on-resistance at 2.7 V, -72 dB off-isolation at 100 kHz, and 93 MHz -3 dB bandwidth, enabling clean audio and data path switching in space-constrained applications like GPS receivers and cellular handsets.
For engineers reviewing the DG2749DN-T1-E4 datasheet, DG2749DN-T1-E4 pinout, DG2749DN-T1-E4 application, or DG2749DN-T1-E4 equivalent, key selection criteria include its NC/NO terminal configuration, 1.4 V logic-high threshold compatible with 1.8 V/2.5 V controllers, and guaranteed 0.1 Ω RON flatness across 0–1.5 V analog swing - critical for THD-sensitive audio paths.
Technical Context
The DG2749DN-T1-E4 implements a dual independent SPST switch with break-before-make timing to prevent signal shorting during state transitions. Its control logic accepts 1.4 V high-level inputs across 1.6–4.3 V supply range, and internal ESD protection exceeds 7 kV HBM.
Each channel features separate COM/NC/NO terminals, supporting bidirectional analog signal routing up to V+ amplitude. The device achieves 0.03 % total harmonic distortion (20 Hz–20 kHz) and -100 dB crosstalk at 100 kHz, confirming suitability for stereo audio and precision sensor multiplexing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance | 0.4 Ω typ. at 2.7 V - enables minimal voltage drop and power loss in battery-powered signal paths |
| RON Flatness | 0.1 Ω max. at 2.7 V - ensures consistent gain and linearity across full analog input range (0–1.5 V) |
| Off-Isolation | -72 dB at 100 kHz - suppresses leakage between inactive channels in multi-source audio routing |
| Crosstalk | -100 dB at 100 kHz - prevents audible interference between left/right audio channels |
| -3 dB Bandwidth | 93 MHz - supports high-speed digital signals including USB 1.1 and low-rate LVDS |
| Logic Threshold | VINH = 1.4 V min. at V+ = 3 V - interfaces directly with 1.8 V GPIO without level shifters |
| Supply Range | 1.6 V to 4.3 V - operates from single-cell Li-ion (3.0–4.2 V) or dual-cell NiMH (2.4 V) |
Pinout & Package
The DG2749DN-T1-E4 is housed in a miniQFN-8L package (1.4 × 1.4 × 0.55 mm), RoHS-compliant with lead-free terminations. Exposed thermal pad (Pin 8) must be soldered to PCB ground for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - V+ | Positive supply rail | Accepts 1.6–4.3 V; powers internal CMOS switch core and level-shifting logic |
| 2 - NC1 | Normally closed terminal, Channel 1 | Internally connected to COM1 when IN1 = LOW; open when IN1 = HIGH |
| 3 - COM1 | Common terminal, Channel 1 | Bidirectional analog I/O node; supports signals from 0 V to V+ amplitude |
| 4 - IN1 | Control input, Channel 1 | Active-HIGH logic: ≥1.4 V enables connection between COM1 and NC1 |
| 5 - IN2 | Control input, Channel 2 | Active-HIGH logic: ≥1.4 V enables connection between COM2 and NO2 |
| 6 - COM2 | Common terminal, Channel 2 | Bidirectional analog I/O node; electrically isolated from COM1 when both switches OFF |
| 7 - NC2 | Normally closed terminal, Channel 2 | Internally connected to COM2 when IN2 = LOW; open when IN2 = HIGH |
| 8 - GND | Ground reference | Reference for all analog and digital signals; thermal pad must be connected to PCB ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Break-before-make switching | Guaranteed non-overlapping conduction between NC and NO paths prevents momentary shorts in audio/data routing |
| Ultra-low RON flatness | 0.1 Ω over 0–1.5 V analog swing preserves signal integrity in high-resolution audio codecs |
| High off-isolation | -72 dB at 100 kHz ensures >250:1 signal rejection between inactive channels in multi-input systems |
| Low charge injection | 10 pC typical minimizes voltage glitches on high-impedance nodes (e.g., sensor front-ends) |
| 1.4 V logic-compatible input | Direct interface with 1.8 V microcontrollers eliminates external level-shifting circuitry |
Applications
| Cellular Handset Audio Routing | Portable Media Player Signal Switching |
|---|---|
|
Use Scenario: Selecting between earpiece, speaker, and headset outputs in a smartphone audio subsystem. IC Role / Device Role / Timing Role: Dual SPST analog switch providing break-before-make isolation between competing audio paths. Use Value: 0.4 Ω RON and 0.03 % THD preserve SNR across all output configurations without requiring post-switch amplification. |
Use Scenario: Multiplexing line-in, microphone, and DAC outputs in a handheld music player with shared codec resources. IC Role / Device Role / Timing Role: Bidirectional analog switch enabling flexible signal path reconfiguration under firmware control. Use Value: -100 dB crosstalk at 100 kHz prevents audible bleed between left/right channels during simultaneous playback and recording. |
| GPS Receiver Front-End Switching | Medical Sensor Multiplexer |
|
Use Scenario: Isolating GPS antenna input from auxiliary RF test ports during calibration and normal operation. IC Role / Device Role / Timing Role: Low-capacitance analog switch minimizing insertion loss (<0.1 dB) in 1.575 GHz L1-band signal path. Use Value: 93 MHz -3 dB bandwidth supports harmonics up to 3rd order, ensuring minimal phase distortion in baseband IF stages. |
Use Scenario: Routing ECG, SpO₂, and temperature sensor outputs to a shared ADC in a wearable health monitor. IC Role / Device Role / Timing Role: Precision analog switch with <10 pC charge injection preventing baseline drift in high-gain biopotential amplifiers. Use Value: 0.1 Ω RON flatness maintains consistent gain scaling across all sensor channels, reducing calibration overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4677EUA+ | Single SPST, 0.6 Ω RON, no break-before-make, 1.8 V logic threshold | Lacks dual-channel integration and NC/NO flexibility of DG2749DN-T1-E4 | Use where only one switch is needed and higher RON is acceptable |
| ADG849BRMZ | Dual SPST, 0.5 Ω RON, 1.65 V logic threshold, no NC/NO distinction (COM/NO only) | Does not support break-before-make topology; requires external timing control | Prefer when compact layout and lower THD are prioritized over guaranteed break-before-make |
Compared with MAX4677EUA+ and ADG849BRMZ, the DG2749DN-T1-E4 uniquely integrates NC/NO terminals per channel with factory-guaranteed break-before-make timing, eliminating risk of signal shorting in audio and sensor routing - a design advantage not replicated by either alternative.
Availability
DG2749DN-T1-E4 is available at Aetrix Electronics and suitable for cellular handsets, portable media players, GPS receivers, medical wearables, and PCMCIA card designs requiring stable component supply and long-term production continuity.
Supply support for DG2749DN-T1-E4 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
Vishay Siliconix is a global semiconductor manufacturer specializing in discrete components and analog ICs, with leadership in MOSFETs, diodes, optoelectronics, and precision analog switches.
The DG2749DN-T1-E4 belongs to Vishay's low-voltage analog switch family engineered for portable electronics, emphasizing ultra-low RON, sub-1 V logic compatibility, and miniature QFN packaging to maximize board area efficiency.
FAQ
What is the maximum analog signal voltage supported by the DG2749DN-T1-E4?
The DG2749DN-T1-E4 supports analog signals from 0 V to V+, meaning the maximum signal amplitude equals the positive supply voltage. With a 4.3 V maximum V+, it can pass up to 4.3 V peak-to-peak signals bidirectionally without clipping or damage, provided input voltages remain within the absolute maximum rating of (V+ + 0.3 V).
Does the DG2749DN-T1-E4 require external pull-up or pull-down resistors on its IN1 and IN2 pins?
No, the DG2749DN-T1-E4 does not require external biasing on IN1 or IN2. Its control inputs are CMOS-compatible with defined thresholds: logic HIGH is ≥1.4 V and logic LOW is ≤0.4 V at V+ = 3 V. Direct connection to 1.8 V or 2.5 V GPIO outputs is sufficient, and internal input leakage remains below ±1 µA across temperature.
How does the break-before-make behavior of the DG2749DN-T1-E4 improve system reliability?
The DG2749DN-T1-E4 guarantees break-before-make timing between NC and NO paths in each channel, preventing momentary short circuits during switching transitions. This eliminates risk of signal contention in audio routing or sensor multiplexing, avoiding pop/click artifacts and potential damage to downstream amplifiers or ADC inputs - a critical feature absent in standard SPST switches.
Can the DG2749DN-T1-E4 be used in automotive infotainment systems?
The DG2749DN-T1-E4 is specified for -40 °C to +85 °C operation and meets JEDEC JESD78 latch-up immunity (>250 mA), but it is not AEC-Q200 qualified. For non-safety-critical infotainment functions such as auxiliary audio input selection or display interface switching, it may be deployed with customer validation; however, Vishay does not guarantee automotive-grade reliability or qualification for this part number.
What is the thermal resistance (θJA) of the DG2749DN-T1-E4 in its miniQFN-8L package?
The DG2749DN-T1-E4 has a junction-to-ambient thermal resistance (θJA) of 125 °C/W when mounted on a standard 2-layer PCB with 1 in² copper pour connected to the exposed thermal pad (Pin 8). Derating begins above 70 °C ambient at 2.4 mW/°C, and maximum power dissipation is 190 mW at TA = 25 °C.
DG2749DN-T1-E4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Siliconix
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Switch Circuit:
- SPST - NO/NC
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 2
- On-State Resistance (Max):
- 600mOhm
- Channel-to-Channel Matching (ΔRon):
- 30mOhm (Max)
- Voltage - Supply, Single (V+):
- 1.6V ~ 4.3V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- 25ns, 25ns
- -3db Bandwidth:
- 93MHz
- Charge Injection:
- 10pC
- Channel Capacitance (CS(off), CD(off)):
- 75pF, 55pF
- Current - Leakage (IS(off)) (Max):
- 2nA
- Crosstalk:
- -90dB @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-miniQFN (1.4x1.4)
DG2749DN-T1-E4 FAQ
1.How can I place an order for DG2749DN-T1-E4 through Aetrix?
Please submit a Request for Quotation (RFQ) for DG2749DN-T1-E4 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 DG2749DN-T1-E4 reliable?
The price and inventory of DG2749DN-T1-E4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG2749DN-T1-E4 is usually 5 days.
3.What payment methods are accepted for DG2749DN-T1-E4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG2749DN-T1-E4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG2749DN-T1-E4?
DG2749DN-T1-E4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG2749DN-T1-E4 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 DG2749DN-T1-E4?
For technical support, including DG2749DN-T1-E4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG2749DN-T1-E4 requirements.
6.How does Aetrix verify that DG2749DN-T1-E4 is sourced from the original manufacturer or authorized distributors?
All DG2749DN-T1-E4 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 DG2749DN-T1-E4 meets industry standards.
7.What is the process for return or replacement of DG2749DN-T1-E4?
All DG2749DN-T1-E4 units undergo pre-shipment inspection (PSI). If there is an issue with DG2749DN-T1-E4, 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 DG2749DN-T1-E4 part is unused and in its original packaging.
Return procedure for DG2749DN-T1-E4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DG2749DN-T1-E4 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
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
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 …
