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Vishay Siliconix DG221BDY-E3
- Part No.:
- DG221BDY-E3
- Manufacturer:
- Vishay Siliconix
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DG221BDY-E3.pdf
- Description:
- IC SWITCH SPST-NCX4 90OHM 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,948
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Product details
Overview
DG221BDY-E3 from Vishay Siliconix is a quad SPST CMOS analog switch with integrated latches, designed for precision signal routing in µP-based systems. It features 60 Ω typical on-resistance, ±15 V analog signal range, 150 ns minimum write pulse width, and operates across –40 °C to +85 °C. Used in data acquisition and communication systems where latch-controlled channel selection is required.
For engineers reviewing the DG221BDY-E3 datasheet, DG221BDY-E3 pinout, DG221BDY-E3 application, or DG221BDY-E3 equivalent, key selection criteria include bidirectional analog switching capability, WR-controlled latch behavior, 20 mA continuous channel current rating, and SOIC-16 packaging with RoHS-compliant terminations.
Technical Context
The DG221BDY-E3 implements four independent SPST switches, each with transparent latching controlled by a shared WR (Write) input. Each switch responds to logic-level INx inputs (0 V or 2.4 V) while maintaining state when WR is high.
It integrates an on-chip 5 V regulator for TTL-compatible digital interface operation across wide supply ranges, and uses epitaxial isolation to prevent latchup. True bidirectional conduction in the on-state supports AC/DC analog signal routing without polarity constraints.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Analog Signal Range | ±15 V - supports full-rail bipolar signal switching without clipping |
| On-Resistance (rDS(on)) | 60 Ω typical - ensures minimal voltage drop and signal distortion at 10 mA load |
| Continuous Channel Current | 20 mA - defines max sustained analog path current per switch |
| Write Pulse Width (tW) | 150 ns - enables direct interfacing with fast microprocessor bus cycles |
| Off-Isolation (OIRR) | 70 dB at 100 kHz - suppresses crosstalk between inactive and active channels |
| Charge Injection | 20 pC - limits voltage glitch on sampled-hold nodes during switching |
| Supply Current (I+, I–) | 1.5 mA / –0.4 mA - low power consumption suitable for battery-backed systems |
Pinout & Package
Package: 16-pin narrow SOIC (JEDEC MS-012), RoHS-compliant lead finish, body dimensions 9.9 mm × 3.9 mm × 1.5 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN1–IN4 | Digital control inputs | Set latch state for corresponding switch; logic 0 = ON, logic 1 = OFF when WR = 0 |
| WR | Global write enable | Low pulse latches INx states; high holds previous switch configuration |
| S1–S4 | Analog source terminals | Bidirectional analog inputs/outputs; connect to signal sources or loads |
| D1–D4 | Analog drain terminals | Bidirectional analog inputs/outputs; paired with Sx for SPST switching path |
| V+, V– | Analog supply rails | Provide ±15 V (or ±10 V) analog operating range; define signal swing limits |
| GND | Digital ground reference | Reference for TTL-compatible logic inputs; isolated from analog supplies |
Key Features
| Feature | Design Value |
|---|---|
| Latch-controlled switching | Enables memory-mapped µP interface: one byte writes configure all four switches simultaneously |
| On-chip 5 V regulator | Allows direct connection to 5 V logic buses without external level-shifting circuitry |
| Epitaxial isolation | Prevents latchup under overvoltage transients up to ±34 V (V+ to V–) |
| True bidirectional conduction | Supports AC-coupled signals and bidirectional data paths without polarity restrictions |
| Low charge injection (20 pC) | Minimizes sampling error in precision ADC front-ends and sample-and-hold circuits |
Applications
| Medical Instrumentation | Automatic Test Equipment |
|---|---|
Use Scenario: Multiplexing sensor inputs (ECG, EEG, temperature) into a single ADC channel in portable diagnostic devices. IC Role / Device Role / Timing Role: Quad SPST analog switch with latched control enables static channel selection during measurement cycles. Use Value: 60 Ω on-resistance and 70 dB off-isolation preserve signal fidelity across 0.1–100 Hz biomedical bands. | Use Scenario: Routing calibration references and DUT signals in modular ATE backplanes. IC Role / Device Role / Timing Role: Latch-based switching allows deterministic signal path setup prior to test execution without bus contention. Use Value: 150 ns write pulse width synchronizes with high-speed pattern generators; ±15 V range accommodates industrial-grade reference voltages. |
| Communication Systems | Data Acquisition Systems |
Use Scenario: Selecting between multiple RF front-end gain stages or filter banks in baseband processing modules. IC Role / Device Role / Timing Role: Bidirectional analog switch routes differential analog signals with matched path impedance. Use Value: 29 pF channel-on capacitance and <340 ns turn-off time support >1 MHz modulation bandwidths. | Use Scenario: Configuring programmable gain amplifier (PGA) feedback networks and input attenuation dividers. IC Role / Device Role / Timing Role: Simultaneous latch update via WR pin sets multi-ratio attenuation in single bus cycle. Use Value: Integrated 5 V regulator ensures stable logic interface despite ±15 V analog rail noise coupling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4617ESE+ | Single-supply operation (2.7–12 V), no negative rail required; 65 Ω on-resistance; no internal latches | Preferred for low-voltage, single-rail embedded systems lacking dual supplies | Select when system lacks ±15 V rails and latch functionality is implemented externally |
| ADG426BRUZ | 16-channel, serial SPI interface; 35 Ω on-resistance; requires external latch or controller | Used in high-channel-count systems where space and serial configurability outweigh latch convenience | Choose for scalable channel expansion beyond four paths, accepting added firmware overhead |
Compared with DG221BDY-E3, MAX4617ESE+ eliminates need for V– but sacrifices latch integration and bipolar signal handling; ADG426BRUZ offers higher channel density and digital interface flexibility at the cost of discrete latch management and larger package footprint.
Availability
DG221BDY-E3 is available at Aetrix Electronics and suitable for medical instrumentation, automatic test equipment, and communication systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant SOIC packaging.
Supply support for DG221BDY-E3 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 MOSFETs, diodes, optoelectronics, and precision analog components.
The DG221B series was developed for µP-controlled analog signal routing in instrumentation and process control, emphasizing latch-based determinism, dual-supply robustness, and low-distortion switching.
FAQ
What is the maximum analog signal voltage range supported by the DG221BDY-E3?
The DG221BDY-E3 supports an analog signal range of ±15 V when operated with V+ = +15 V and V– = –15 V. This range is confirmed in the Absolute Maximum Ratings table and Specification section of the datasheet. The device maintains specified on-resistance and leakage performance across this full range, enabling bipolar signal switching in precision instrumentation applications. Operation at reduced ranges (e.g., ±10 V) is also supported with proportional performance retention.
Does the DG221BDY-E3 require external latching circuitry?
No, the DG221BDY-E3 does not require external latching circuitry. It integrates four independent on-chip latches, each controlled by the shared WR (Write) pin. When WR is pulsed low, the states of IN1–IN4 are latched and applied to the corresponding switches. While WR is high, the switch states remain static regardless of INx changes. This internal latch architecture eliminates the need for external flip-flops or memory elements in µP-based control designs.
What is the function of the on-chip 5 V regulator in the DG221BDY-E3?
The on-chip 5 V regulator in the DG221BDY-E3 powers the internal digital logic circuitry, ensuring TTL-compatible input thresholds (0.8 V low, 2.4 V high) even when analog supplies vary. It decouples digital interface operation from analog rail stability, allowing reliable control across wide V+/V– tolerances without external level shifters. This regulator is intrinsic to the DG221BDY-E3 design and requires no external components or bypass capacitors beyond standard power supply decoupling.
Can the DG221BDY-E3 be used with single-supply systems?
The DG221BDY-E3 is designed for dual-supply operation (V+, V–, GND) and requires both positive and negative analog rails to achieve its specified ±15 V signal range and internal biasing. While it may function with V– = 0 V in limited cases, doing so violates Absolute Maximum Ratings (e.g., "Voltages Referenced V+ to V–" limit of 34 V) and degrades key parameters including off-leakage, on-resistance matching, and charge injection. For true single-supply applications, alternative parts like the MAX4617ESE+ should be selected instead of the DG221BDY-E3.
What is the thermal derating behavior of the DG221BDY-E3 in SOIC package?
The DG221BDY-E3 in SOIC package has a power dissipation derating of 7.7 mW/°C above +75 °C ambient, as specified in Note c of the datasheet. Its maximum rated power dissipation is 600 mW at ≤+75 °C. Above that temperature, allowable power must be linearly reduced: for example, at +100 °C ambient, maximum dissipation drops to 600 mW – (25 °C × 7.7 mW/°C) = 407.5 mW. This derating ensures safe junction temperature operation and long-term reliability under sustained thermal stress.
DG221BDY-E3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Siliconix
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Last Time Buy
- Switch Circuit:
- SPST - NC
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 4
- On-State Resistance (Max):
- 90Ohm
- Channel-to-Channel Matching (ΔRon):
- -
- Voltage - Supply, Single (V+):
- 13V ~ 18V
- Voltage - Supply, Dual (V±):
- ±7V ~ 18V
- Switch Time (Ton, Toff) (Max):
- 550ns, 340ns
- -3db Bandwidth:
- -
- Charge Injection:
- 20pC
- Channel Capacitance (CS(off), CD(off)):
- 8pF, 9pF
- Current - Leakage (IS(off)) (Max):
- 5nA
- Crosstalk:
- -90dB @ 100kHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
DG221BDY-E3 FAQ
1.How can I place an order for DG221BDY-E3 through Aetrix?
Please submit a Request for Quotation (RFQ) for DG221BDY-E3 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 DG221BDY-E3 reliable?
The price and inventory of DG221BDY-E3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG221BDY-E3 is usually 5 days.
3.What payment methods are accepted for DG221BDY-E3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG221BDY-E3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG221BDY-E3?
DG221BDY-E3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG221BDY-E3 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 DG221BDY-E3?
For technical support, including DG221BDY-E3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG221BDY-E3 requirements.
6.How does Aetrix verify that DG221BDY-E3 is sourced from the original manufacturer or authorized distributors?
All DG221BDY-E3 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 DG221BDY-E3 meets industry standards.
7.What is the process for return or replacement of DG221BDY-E3?
All DG221BDY-E3 units undergo pre-shipment inspection (PSI). If there is an issue with DG221BDY-E3, 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 DG221BDY-E3 part is unused and in its original packaging.
Return procedure for DG221BDY-E3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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