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Product Detailed Parameters
- Description：IC SWITCH SPST-NCX4 85OHM 16SOIC
- Series：-
- Mfr：Vishay Siliconix
- Package：Tape & Reel (TR)
- Switch Circuit：SPST - NC
- Multiplexer/Demultiplexer Circuit：1:01
- On-State Resistance (Max)：85Ohm
- Channel-to-Channel Matching (ΔRon)：1.7Ohm
- Voltage - Supply, Single (V+)：4V ~ 44V
- Voltage - Supply, Dual (V±)：±4V ~ 22V
- Switch Time (Ton, Toff) (Max)：200ns, 150ns
- -3db Bandwidth：-
- Charge Injection：1pC
- Channel Capacitance (CS(off), CD(off))：5pF, 5pF
- Current - Leakage (IS(off)) (Max)：500pA
- Crosstalk：-95dB @ 100kHz
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：16-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：16-SOIC
- Number of Circuits：4
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Overview
The DG309BDY-T1 is a quad single-pole single-throw (SPST) analog switch manufactured by Vishay Siliconix in a 16-pin Narrow SOIC package. It operates with dual supplies ranging from ±4 V to ±22 V or a single supply up to 44 V. The device features a maximum on-resistance of 85 Ω at room temperature and 100 Ω across the full temperature range, with a turn-on time of 200 ns and turn-off time of 150 ns. Supply current is limited to 5 µA maximum. It supports bi-directional signal handling and includes an epitaxial layer to prevent latchup.
Feature Summary
- Normally closed configuration where the switch connects the source and drain when the logic input is low.
- Proprietary silicon gate CMOS process provides low leakage currents and reduced power consumption.
- Improved charge injection compensation design minimizes switching transients for higher accuracy.
- Epitaxial layer integration prevents latchup during operation.
Applications
- Sample-and-hold circuits
- Industrial instrumentation
- Test equipment
Procurement Notes
Verify the specific suffix 'T1' indicates tape and reel packaging rather than tube distribution. Confirm RoHS compliance status as standard parts may vary; check for the '-E3' suffix if lead-free terminations are required. Ensure the narrow SOIC footprint matches the PCB layout constraints before ordering.
Selection Notes
Select this part over the DG308B variant specifically when a normally closed default state is required. Verify that the 85 Ω on-resistance meets the signal integrity requirements for the application. Ensure the operating voltage does not exceed the ±22 V absolute maximum rating to maintain reliability.
Part Context
This component belongs to the DG308B/DG309B series of improved quad CMOS analog switches. It serves as the normally closed counterpart to the DG308B, which is normally open. Both devices share identical electrical characteristics but differ in their logic control truth tables.
Replacement Considerations
DG309BDJ-E3
FAQ
What is the difference between DG308B and DG309B?
The DG308B is a normally open switch, while the DG309B is a normally closed switch. They share identical electrical specifications and pinouts.
Does the DG309BDY-T1 support single-supply operation?
Yes, it can operate with a single supply voltage ranging from 4 V to 44 V, although dual supplies are also supported.
What is the maximum analog signal range?
The analog signal range extends from the negative supply rail (V-) to the positive supply rail (V+), allowing signals up to ±22 V.
