My Inquiry
My Account
Vishay Siliconix DG2748DN-T1-E4
- Part No.:
- DG2748DN-T1-E4
- Manufacturer:
- Vishay Siliconix
- Package:
- 8-UFQFN
- Datasheet:
-
DG2748DN-T1-E4.pdf
- Description:
- IC SW SPST-NCX2 600MOHM 8MINIQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,288
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
DG2748DN-T1-E4 from Vishay Siliconix is a dual SPST analog switch in miniQFN-8L package, designed for low-voltage signal routing with 0.4 Ω typical on-resistance at 2.7 V, -100 dB crosstalk at 100 kHz, and 93 MHz -3 dB bandwidth. It operates from 1.6 V to 4.3 V supply, supports bidirectional signal switching up to V+, and targets high-fidelity audio paths in space-constrained portable systems.
For engineers reviewing the DG2748DN-T1-E4 datasheet, DG2748DN-T1-E4 pinout, DG2748DN-T1-E4 application, or DG2748DN-T1-E4 equivalent, key selection criteria include its NC/NC dual open configuration, logic-compatible 1.4 V input threshold, ultra-low charge injection (10 pC), and RoHS-compliant miniQFN-1.4×1.4 mm footprint.
Technical Context
The DG2748DN-T1-E4 implements two independent normally-closed (NC) switches with no common connection between channels - pins 3 and 4 are NC1 and NC2, respectively, while COM1 and COM2 serve as dedicated output terminals. Its sub-micron CMOS process enables flat on-resistance (0.1 Ω) and low THD (0.03 %) across audio band (20 Hz–20 kHz).
Control logic accepts 1.4 V high-level inputs compatible with 1.8 V/2.5 V digital interfaces, and internal ESD protection exceeds 7 kV HBM. The device exhibits <25 ns switching times (tON/tOFF), 75 pF source-off capacitance, and maintains <±10 nA channel leakage over -40 °C to +85 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-resistance (RDS(on)) | 0.4 Ω typ. at 2.7 V - ensures minimal signal attenuation in audio and sensor paths |
| Crosstalk | -100 dB at 100 kHz - prevents audible interference between adjacent analog channels |
| -3 dB bandwidth | 93 MHz - supports high-speed data routing beyond USB 1.1 and I²S clock domains |
| Supply voltage range | 1.6 V to 4.3 V - enables direct interface with Li-ion battery rails and low-power microcontrollers |
| Charge injection | 10 pC - limits glitch-induced DC offset in precision ADC front-ends |
| Logic high threshold (VINH) | 1.4 V at V+ = 3 V - guarantees reliable activation from 1.8 V GPIO without level-shifting |
| Off-isolation | -72 dB at 100 kHz - suppresses coupling from powered-down sections into active signal chains |
Pinout & Package
The DG2748DN-T1-E4 is housed in a lead-free miniQFN-8L package measuring 1.4 × 1.4 × 0.55 mm, with wettable flank leads for automated optical inspection. Thermal pad (Pin 5) must be soldered to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for analog and digital domains; connects to thermal pad |
| 2 | V+ | Positive supply rail (1.6–4.3 V); powers internal logic and switch FETs |
| 3 | NC1 | No-connect terminal for Channel 1 - must remain unconnected per datasheet |
| 4 | NC2 | No-connect terminal for Channel 2 - electrically isolated, not internally tied |
| 5 | IN1 | Logic control input for Channel 1 - high = open circuit (NC1–COM1 disconnected) |
| 6 | IN2 | Logic control input for Channel 2 - high = open circuit (NC2–COM2 disconnected) |
| 7 | COM1 | Common output for Channel 1 - connects to NC1 when IN1 = low |
| 8 | COM2 | Common output for Channel 2 - connects to NC2 when IN2 = low |
Key Features
| Feature | Design Value |
|---|---|
| Dual NC-only topology | Provides fail-safe closed-path default state for safety-critical signal gating |
| 0.1 Ω RON flatness | Maintains consistent gain and linearity across full analog signal swing (0–V+) |
| 75 pF source-off capacitance | Minimizes capacitive loading on driving source during channel disable |
| 100 % RoHS-compliant terminations | Enables compliance with EU WEEE and China RoHS without material substitution |
| 2.4 mW/°C derating above 70 °C | Supports sustained operation up to +85 °C ambient in sealed handheld enclosures |
Applications
| Cellular Phone Audio Routing | Portable Media Player Signal Switching |
|---|---|
Use Scenario: Selecting between earpiece, speaker, and headset outputs in multi-mode mobile handsets. IC Role / Device Role / Timing Role: Dual NC analog switch isolating competing audio paths while maintaining low-THD signal integrity. Use Value: Eliminates mechanical relays and reduces BOM count by consolidating three discrete switching functions into one 1.4 mm² package. | Use Scenario: Dynamically routing line-in, DAC output, and microphone signals in flash-based audio players. IC Role / Device Role / Timing Role: Bidirectional analog gate enabling shared ADC/DAC resources across multiple transducers. Use Value: Achieves <0.03 % THD and -100 dB crosstalk to preserve CD-quality playback fidelity during real-time path reconfiguration. |
| GPS Receiver Front-End Protection | Medical Sensor Signal Conditioning |
Use Scenario: Isolating GPS antenna input from LNA during RF calibration or standby mode. IC Role / Device Role / Timing Role: High-isolation NC switch blocking RF leakage while preserving low-noise figure. Use Value: Delivers -72 dB off-isolation at 100 kHz and 93 MHz bandwidth to prevent LO feedthrough and maintain SNR > 45 dB. | Use Scenario: Gating ECG electrode inputs during lead-off detection or multi-channel multiplexing. IC Role / Device Role / Timing Role: Low-leakage (<±10 nA) analog switch preventing DC offset drift in high-impedance biopotential circuits. Use Value: Ensures baseline stability and eliminates >10 µV error sources in 24-bit medical ADC front-ends. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual SPST analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Texas Instruments TS5A23157DCUR | 0.9 Ω RDS(on) at 3 V; 500 MHz bandwidth; 1.65–5.5 V operation | Better RF performance but higher on-resistance degrades audio SNR | Select when wideband RF routing dominates over audio fidelity |
| Analog Devices ADG849YRMZ-REEL7 | 0.5 Ω RDS(on) at 3 V; -85 dB crosstalk at 100 kHz; 1.8–5.5 V supply | Higher logic threshold (1.7 V) requires level-shifting for 1.8 V controllers | Choose when tighter RON matching is critical and system uses ≥2.5 V logic |
Compared with TS5A23157DCUR and ADG849YRMZ-REEL7, the DG2748DN-T1-E4 delivers superior audio-grade performance (0.4 Ω, -100 dB crosstalk, 0.03 % THD) at 1.6 V minimum supply, making it optimal for battery-powered devices where power efficiency and signal purity are co-prioritized.
Availability
DG2748DN-T1-E4 is available at Aetrix Electronics and suitable for cellular phones, portable media players, GPS receivers, and medical sensor modules requiring stable component supply across long production lifecycles.
Supply support for DG2748DN-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 DG2748DN-T1-E4 belongs to Vishay's low-voltage analog switch family engineered for portable electronics, emphasizing ultra-low on-resistance, miniature packaging, and compatibility with single-cell Li-ion and coin-cell power sources.
FAQ
What is the function of NC1 and NC2 pins on the DG2748DN-T1-E4?
The NC1 and NC2 pins on the DG2748DN-T1-E4 are no-connect terminals - they are not internally connected to any circuitry and must remain unconnected in the PCB layout. This distinguishes DG2748DN-T1-E4 from DG2747 (SPST-NO) and DG2749 (break-before-make), confirming its dual normally-closed topology where COM1 and COM2 are the only functional output nodes.
Does the DG2748DN-T1-E4 support bidirectional analog signal routing?
Yes, the DG2748DN-T1-E4 supports fully bidirectional analog signal routing between COM1/COM2 and their respective NC paths. Signals up to the full V+ rail (e.g., 3.3 V or 4.3 V) can pass in either direction with symmetrical on-resistance and THD performance, as confirmed by the datasheet's "signals with amplitudes of up to VCC to be transmitted in either direction" specification.
What is the maximum continuous current rating for the DG2748DN-T1-E4 switch path?
The DG2748DN-T1-E4 supports ±300 mA continuous current through its COM/NC switch paths, as specified in the Absolute Maximum Ratings table. This rating applies under derated conditions: power dissipation must not exceed 190 mW, and thermal derating of 2.4 mW/°C applies above 70 °C ambient temperature.
Is the DG2748DN-T1-E4 pin-compatible with other devices in the DG2747/DG2748/DG2749 family?
No, the DG2748DN-T1-E4 is not pin-compatible with DG2747DN-T1-E4 or DG2749DN-T1-E4. While all three share the same miniQFN-8L package, their pin functions differ significantly: DG2747 uses NO1/NO2 outputs, DG2749 implements break-before-make with NC/NO pairs, and DG2748DN-T1-E4 assigns Pins 3 and 4 exclusively to NC1 and NC2 - requiring unique PCB layout.
How does the DG2748DN-T1-E4 achieve 1.4 V logic compatibility?
The DG2748DN-T1-E4 achieves 1.4 V logic compatibility via optimized input threshold design: its VINH parameter is guaranteed at 1.4 V (min) across -40 °C to +85 °C when V+ = 3 V, allowing direct interfacing with 1.8 V and 2.5 V digital controllers without external level shifters - a feature verified in the Truth Table and Electrical Characteristics tables of Document Number 69977.
DG2748DN-T1-E4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Siliconix
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Switch Circuit:
- SPST - 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)
DG2748DN-T1-E4 FAQ
1.How can I place an order for DG2748DN-T1-E4 through Aetrix?
Please submit a Request for Quotation (RFQ) for DG2748DN-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 DG2748DN-T1-E4 reliable?
The price and inventory of DG2748DN-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 DG2748DN-T1-E4 is usually 5 days.
3.What payment methods are accepted for DG2748DN-T1-E4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG2748DN-T1-E4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG2748DN-T1-E4?
DG2748DN-T1-E4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG2748DN-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 DG2748DN-T1-E4?
For technical support, including DG2748DN-T1-E4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG2748DN-T1-E4 requirements.
6.How does Aetrix verify that DG2748DN-T1-E4 is sourced from the original manufacturer or authorized distributors?
All DG2748DN-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 DG2748DN-T1-E4 meets industry standards.
7.What is the process for return or replacement of DG2748DN-T1-E4?
All DG2748DN-T1-E4 units undergo pre-shipment inspection (PSI). If there is an issue with DG2748DN-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 DG2748DN-T1-E4 part is unused and in its original packaging.
Return procedure for DG2748DN-T1-E4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DG2748DN-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 …
