DG309CY+ - Quad SPST 100 Ohm Analog Switch | Analog Devices
部品番号: DG309CY+ ✓ 生産中DG309CY+ 概要
An analog switch is an interface IC that connects or isolates circuit nodes under digital control. It sits between signal sources and destination circuitry within a larger interface or signal-routing architecture. Unlike a mechanical relay, the DG309CY+ uses CMOS electronics to provide compact, fast, low-power switching, making it suitable for test equipment, data acquisition, instrumentation, and embedded control systems.
The DG309CY+ provides four analog switch channels, a 1:1 signal configuration, and 100 ohm on-resistance. Its normally closed operation allows a default signal path to remain connected before the control input is asserted. The 16-pin SOIC package is a surface-mount package that supports conventional PCB assembly, while the exposed package dimensions are not established by the listed product information.
The DG309CY+ is designed for single-pole, single-throw signal routing, not for power switching or high-voltage isolation. Its practical performance depends on the applied signal range, control logic levels, switch charge injection, off leakage, and the impedance of the connected circuit. Those electrical characteristics must be taken from the manufacturer datasheet before finalizing signal-integrity or timing budgets.
Typical uses include analog test-point selection, sensor signal routing, sample-and-hold interfacing, communication path selection, and control of multiple peripheral inputs. A normally closed switch is especially useful where loss of control power or a defined inactive state should preserve the original connection rather than isolate the signal path.
For PCB implementation, place the device close to the switched nodes to minimize trace resistance and coupling between adjacent channels. Confirm control-pin logic and signal limits against the manufacturer datasheet, and check continuity behavior during power-up. Do not assume that a low on-resistance makes the switch suitable for high-current loads.
This product record combines the exact catalog identity, package, switch configuration, and resistance data with practical guidance for routing, signal integrity, lifecycle review, sourcing, and drop-in replacement evaluation. It also distinguishes the verified device facts from specifications that must be checked in the manufacturer datasheet.
ドロップイン代替品: DG309CY+ — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: DG309CY+ （同一形状・フットプリント） — 相違点: Mounting Type, On-Resistance, Package, Switch Type, Technology.
DG309A
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
DG309CJ+
✅ ドロップイン ⚠️ 仕様未検証価格はお問い合わせください
データシートを見る →DG309DY
✅ ドロップイン📋 参考代替品（カタログ未掲載）
DG309DY-T1
✅ ドロップイン📋 参考代替品（カタログ未掲載）
DG309AD
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
DG309CY+ 最大定格＆電気的特性
| Number of Switches | 4 circuits |
| Switch Configuration | 1:1 |
| On-Resistance | 100 ohm |
| Switch Type | Quad SPST |
| Contact State | Normally closed |
| Technology | CMOS analog switch |
| ピン数 | 16 pins |
| パッケージ | 16-SOIC |
| 実装タイプ | Surface mount |
| Signal Paths | 4 independent switch channels |
| RoHS ステータス | unknown |
| REACH Status | unknown |
| AEC-Q100 Qualification | not_applicable |
DG309CY+ 16-soic ピン配置ガイド
DG309CY+ (16-soic パッケージ) のピン配置。 ピン番号、機能、接続図はメーカーのデータシートで定義されています。正確なフットプリントとはんだ付けのガイドラインについては、データシートを参照してください。
詳細なピン配置データはありません: DG309CY+.
詳細は データシート をご参照ください。
主な用途
DG309CY+ の用途: 6 件s: Analog Test-Point Multiplexing, Sensor Signal Routing, Communication Path Selection, Data-Acquisition Front Ends, Sample-and-Hold Interface Control, Peripheral and Control-Line Multiplexing.
Analog Test-Point Multiplexing
The DG309CY+ is well suited to routing a measured analog node toward a test instrument because it provides four independent, normally closed SPST paths in a 16-SOIC package. Its 100 ohm on-resistance adds a defined series impedance that should be included in the measurement-path error budget. The normally closed state can also preserve a connection during reset or until the controller explicitly changes the route. Place the IC near the test points to minimize trace capacitance, and verify control levels, leakage, charge injection, and settling time in the manufacturer datasheet.
おすすめ
Sensor Signal Routing
The DG309CY+ can route one conditioned sensor output among several analog destinations using its four normally closed channels. This arrangement supports programmable instrumentation, selectable inputs, and compact signal-path sharing without introducing mechanical relays. The documented 100 ohm on-resistance must be checked against the sensor source impedance and the allowable measurement error. Designers should also evaluate charge injection, off leakage, control logic, and settling behavior because they can affect low-level or high-impedance sensor measurements.
おすすめ
Communication Path Selection
The DG309CY+ supports 1:1 routing of low-voltage communication or control lines when the system requires four selectable paths with a normally closed default. A closed default can maintain a link during startup or provide a defined fallback when a controller is inactive. The CMOS switch architecture avoids the mechanical delay and wear associated with a relay, but the design must remain within the verified signal-voltage and bandwidth limits. Confirm switching time, charge injection, and off-channel isolation before using it for high-speed or high-isolation links.
おすすめ
Data-Acquisition Front Ends
The DG309CY+ can select among multiple external inputs in a compact data-acquisition front end, allowing several conditioned channels to reach a common converter path. Its four normally closed SPST switches provide local routing while the 16-SOIC package keeps the implementation in a standard surface-mount footprint. Because the switch contributes 100 ohm on-resistance, the selected source should have sufficiently low impedance or appropriate gain correction. Input capacitance, channel leakage, switching transients, and control timing must be included in the acquisition error analysis.
おすすめ
Sample-and-Hold Interface Control
The DG309CY+ can provide selectable connections around a sample-and-hold or measurement-gain stage when the design needs multiple normally closed paths. Keeping the selected route connected by default may simplify reset behavior and reduce ambiguity in fault conditions. The 100 ohm on-resistance should be combined with the switch's effective capacitance when calculating settling time for the connected network. Validate charge injection, control-logic thresholds, and maximum signal amplitude with the manufacturer datasheet before selecting component values around the switch.
おすすめ
Peripheral and Control-Line Multiplexing
The DG309CY+ is useful for sharing a peripheral input among several control or monitoring sources through four normally closed SPST paths. The normally closed behavior allows a primary source to remain connected until another route is deliberately selected, which can simplify firmware state handling. Because this is an IC signal switch rather than a power device, loads must remain within the verified current and voltage limits. Review off leakage, logic thresholds, switching transients, and package pin assignments in the manufacturer datasheet.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: DG309CY+ — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | DG309A | DG309C | DG309DY | DG309DY-T1 | DG309AD |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Vishay Siliconix | Analog Devices |
| Package | 16-SOIC | 16-SOIC | 16-SOIC | 16-SOIC | 16-SOIC | 16-SOIC |
| Number of Switches | 4 circuits | 4 circuits | 4 circuits | 4 circuits | 4 circuits | 4 circuits |
| Switch Configuration | 1:1 | 1:1 | 1:1 | 1:1 | 1:1 | 1:1 |
| Switch Type | Quad SPST | Quad SPST | Quad SPST | Quad SPST | Quad SPST | Quad SPST |
| Contact State | Normally closed | Normally closed | Normally closed | Normally closed | Normally closed | Normally closed |
| Mounting Type | Surface mount | Surface mount | Surface mount | Surface mount | Surface mount | Surface mount |
主な差別化要因
- Normally closed signal paths （vs DG309DY-T1)
- Four independent 1:1 routing channels （vs DG308A)
- Compact 16-SOIC implementation （vs DG309U)
設計ノート
Include the documented 100 ohm on-resistance in the complete source-impedance and gain-error calculation. For a high-impedance sensor or receiver, the switch resistance may be negligible; for a low-impedance source, it can create measurable attenuation or interaction with downstream loading. Also check the switch capacitance, charge injection, and off leakage in the manufacturer datasheet before setting bandwidth and accuracy targets.
Place the DG309CY+ close to the switched nodes and minimize the length of both signal and common traces. Long PCB runs can add resistance, parasitic capacitance, coupling, and ground inductance that degrade the behavior of the nominal 100 ohm switch. Use a continuous ground reference, keep control routing away from sensitive analog paths where practical, and follow the manufacturer layout and bypass recommendations.
Do not treat the DG309CY+ as a general-purpose power switch. Its verified catalog description identifies an IC analog switch with 100 ohm on-resistance, while current, voltage, power, and absolute maximum limits are not established by the listed summaries. Verify signal amplitude, load current, control levels, and temperature limits in the manufacturer datasheet. Also avoid assuming that the four channels have identical application behavior if the routed signals differ substantially in amplitude or frequency.
Define the expected state of every normally closed path during reset, startup, and loss of control activity. If a default connection is intentional, the control circuit must not create an unintended transition or back-power the routed node. Conversely, if isolation is required during reset, use an external pull device or another isolation stage because the switch's default state must be checked against the complete system requirements.
コンプライアンス情報
The listed product summaries do not explicitly identify RoHS, REACH, lead-free, halogen-free, or conflict-minerals status. Confirm these attributes using the manufacturer product documentation and the traceable lot documentation supplied with a quotation.