DG309BDQ

$1.27

Description：IC SW SPST-NCX4 85OHM 16TSSOP
Series：-

SKU:405a51b4f2a8 Category: Analog Switches, Multiplexers, Demultiplexers Brand: Vishay Siliconix

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Product introduction

Product Detailed Parameters

Description：IC SW SPST-NCX4 85OHM 16TSSOP
Series：-
Mfr：Vishay Siliconix
Package：Tube
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-TSSOP (0.173", 4.40mm Width)
Supplier Device Package：16-TSSOP
Number of Circuits：4

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DG309BDQ

Overview

The DG309BDQ is a quad single-pole single-throw (SPST) analog switch manufactured by Vishay Siliconix in a 16-pin TSSOP package. It operates with dual supplies up to ±22 V or single supplies up to 44 V, supporting analog signals within the supply range. The device features a maximum on-resistance of 85 Ω at room temperature and 100 Ω across the full -40 °C to +85 °C operating range. Switching times are rated at a maximum of 200 ns for turn-on and 150 ns for turn-off. Supply current is limited to 5 µA maximum, and it includes charge injection compensation.

Feature Summary

Normally closed configuration where the switch conducts when the logic input is low and blocks when high.
Proprietary silicon gate CMOS process provides low leakage and reduced power consumption.
Epitaxial layer design prevents latchup during operation.
Improved charge injection compensation minimizes switching transients.

Applications

Sample-and-hold circuits
Industrial instrumentation
Test equipment

Procurement Notes

Verify the specific suffix 'DQ' confirms the 16-lead Thin Shrink Small Outline Package (TSSOP). Confirm RoHS compliance status if required, as non-compliant versions exist without the '-E3' designation. Ensure the ordering code matches the normally closed function of the DG309B series rather than the normally open DG308B.

Selection Notes

Select this component for applications requiring a normally closed analog path controlled by standard CMOS logic levels. Verify that the maximum on-resistance of 85 Ω meets signal integrity requirements. Ensure the operating voltage does not exceed the ±22 V absolute maximum rating to prevent permanent damage.

Part Context

This part belongs to the DG308B/DG309B family of improved quad CMOS analog switches. It serves as the normally closed counterpart to the DG308BDQ. Both devices share identical electrical characteristics and pinouts but differ in their default logic states.

Replacement Considerations

DG309BDJ-E3

FAQ

What is the default state of the DG309BDQ switches?

The DG309BDQ is a normally closed switch; the channels conduct when the logic input is low (≤ 3.5 V) and block when the input is high (≥ 11 V).

Does the DG309BDQ support single-supply operation?

Yes, the device supports single-supply operation with a maximum voltage of 44 V, though on-resistance values increase compared to dual-supply configurations.