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Analog Devices Inc./Maxim Integrated DG309CY
- Part No.:
- DG309CY
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DG309CY.pdf
- Description:
- IC SW SPST-NCX4 100OHM 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,728
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Product details
Overview
DG309CY from Maxim Integrated is a quad SPST analog switch with normally closed (NC) configuration, designed for precision signal routing in bipolar or single-supply systems. It delivers 60Ω typical on-resistance, <120ns turn-on time, <90ns turn-off time, and ±44V breakdown voltage, enabling reliable 30VPP analog switching in test equipment and military radios.
For engineers reviewing the DG309CY datasheet, DG309CY pinout, DG309CY application, or DG309CY equivalent, key selection criteria include NC logic behavior, CMOS-compatible control inputs, 16-pin narrow SO package compatibility, leakage performance below ±100nA at TMAX, and operation across -40°C to +85°C industrial temperature range.
Technical Context
The DG309CY implements monolithic low-power CMOS architecture with substrate-connected V+ pin, supporting dual-supply (±5V to ±20V) or single-supply (+5V to +30V) operation while maintaining logic-level compatibility. Its NC topology ensures default conduction path closure without active drive.
Switching performance is defined by charge injection ≤10pC, off-isolation ≥78dB at 500kHz, and channel capacitance of 11pF (CS(OFF)) / 27pF (CD(ON)+CS(ON)). Analog signal range spans -15V to +15V under ±15V supplies, with leakage currents tightly specified across temperature extremes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Configuration | Quad SPST, normally closed (NC) - all four channels conduct when control input is logic low |
| rDS(ON) | 60Ω typical - enables low insertion loss in signal-path applications up to 10mA per channel |
| tON/tOFF | 130ns/90ns max - supports high-speed multiplexing in automated test equipment sampling paths |
| VBREAKDOWN | ±44V - allows safe blocking of 30VPP signals with 4.5V margin under worst-case transients |
| ILEAKAGE | ±100nA max at TMAX - preserves accuracy in high-impedance sample-and-hold circuits |
| Supply Range | ±5V to ±20V (bipolar) or +5V to +30V (single) - eliminates need for level-shifting in mixed-signal systems |
| Logic Compatibility | CMOS-input - draws <1µA at VINH/VINL, reducing loading on FPGA or microcontroller GPIOs |
Pinout & Package
Package: 16-pin narrow SO (Small Outline) - 7.5mm body width, 1.27mm pitch, RoHS-compliant, surface-mount compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN1–IN4 (Pins 1,8,9,16) | CMOS logic control inputs | Active-low enables NC state; compatible with 3.3V/5V logic without external resistors |
| S1–S4 (Pins 3,6,11,14) | Analog source terminals | Input side of NC switches; referenced to V− in bipolar operation |
| D1–D4 (Pins 2,7,10,15) | Analog drain terminals | Output side of NC switches; connects to load or next stage when INx = low |
| V+ (Pin 13) | Positive supply / substrate connection | Must be tied to highest potential rail; internally connected to substrate for latch-up immunity |
| V− (Pin 4) | Negative supply | Required for bipolar operation; sets lower bound of analog signal range |
| GND (Pin 5) | Circuit ground reference | Return path for logic inputs and supply currents; separate from analog ground in mixed-signal layouts |
| N.C. (Pin 12) | No-connect terminal | Not bonded internally; must remain unconnected to avoid parasitic coupling |
Key Features
| Feature | Design Value |
|---|---|
| Monolithic CMOS construction | Eliminates discrete transistor matching errors and enables consistent rDS(ON) tracking across all four channels |
| Low charge injection (≤10pC) | Minimizes voltage step errors in sample-and-hold amplifiers using DG309CY as hold switch |
| High off-isolation (≥78dB) | Prevents crosstalk between adjacent channels in multi-channel communication system front-ends |
| Bipolar/single-supply flexibility | Reduces BOM count by supporting both ±15V instrumentation and +12V embedded control systems |
| Extended temperature range (-40°C to +85°C) | Validated for use in PBX line cards and military radio chassis without derating |
Applications
| Sample-and-Hold Circuits | Test Equipment |
|---|---|
Use Scenario: Capturing transient analog waveforms in automated test systems with sub-microsecond aperture time requirements. IC Role / Device Role / Timing Role: NC switch placed in hold path to maintain capacitor voltage during acquisition phase; controlled by precision timing generator. Use Value: 10pC charge injection and 60Ω rDS(ON) limit droop error to <0.5mV over 10ms hold period with 1nF capacitor. |
Use Scenario: Signal routing matrix in benchtop multimeters and oscilloscope front-end calibration modules. IC Role / Device Role / Timing Role: Quad SPST switch selecting between reference voltages, sensor inputs, or internal calibration sources under microcontroller command. Use Value: 78dB off-isolation prevents measurement contamination when routing mV-level signals alongside 10V ranges. |
| Communications Systems | Military Radios |
Use Scenario: Antenna diversity switching and IF signal path selection in SDR transceivers operating from HF to UHF bands. IC Role / Device Role / Timing Role: NC configuration provides fail-safe signal continuity during power-up or control failure; CMOS inputs interface directly with baseband ASIC. Use Value: ±44V breakdown rating accommodates 30VPP RF envelope peaks without clamping diodes or external protection. |
Use Scenario: Audio path switching in manpack and vehicular radios requiring MIL-STD-810G environmental compliance. IC Role / Device Role / Timing Role: Isolating microphone preamp outputs from speaker drivers during PTT transitions to prevent pop noise. Use Value: -40°C to +85°C qualification ensures stable rDS(ON) and leakage performance across desert and arctic operational profiles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADG201AKRZ | Quad SPST NO (not NC), 90Ω rDS(ON), ±15V supply only, 16-lead SOIC package | Requires inverted logic drive; higher on-resistance increases gain error in precision gain-setting networks | Select when NC behavior is not required and system uses only ±15V rails |
| TS5A23157DCUR | Single-pole double-throw (SPDT), 0.9Ω rDS(ON), +1.65V to +5.5V supply, 8-pin VSSOP | SPDT topology enables signal inversion or dual-path routing; incompatible pinout and logic polarity | Choose for low-voltage battery-powered designs where ultra-low on-resistance outweighs quad-channel density |
Compared with ADG201AKRZ and TS5A23157DCUR, DG309CY uniquely provides NC functionality in a quad configuration with wide supply range and proven military-grade reliability-making it irreplaceable in fail-safe signal routing and high-voltage test instrumentation.
Availability
DG309CY is available at Aetrix Electronics and suitable for test equipment, communications systems, military radios, and guidance and control systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for DG309CY 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
Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and defense markets.
The DG309CY belongs to Maxim's legacy analog switch family engineered for robust signal integrity in harsh environments-designed specifically for applications demanding guaranteed NC behavior, high breakdown voltage, and wide supply flexibility.
FAQ
What is the logic polarity of DG309CY control inputs?
The DG309CY features active-low logic control: when INx is logic low (≤0.8V), the corresponding Sx–Dx path is closed (NC behavior); when INx is logic high (≥2.4V), the path opens. This fail-safe design ensures signal continuity during microcontroller reset or power-loss events, making DG309CY ideal for critical signal routing where interruption cannot be tolerated.
Can DG309CY operate from a single +12V supply?
Yes, DG309CY supports single-supply operation from +5V to +30V. With +12V applied to V+, GND tied to V−, and analog signals referenced to GND, the device maintains full functionality. However, rDS(ON) increases slightly versus bipolar operation, and analog range is limited to 0V to +12V-verified in the Electrical Characteristics table for DG30_C/D grade parts.
What is the maximum peak current rating for DG309CY drain/source terminals?
DG309CY supports 70mA peak current (1ms pulse, 10% duty cycle max) per S or D terminal, as specified in Absolute Maximum Ratings. This allows brief surge handling during hot-swap events or capacitor charging transients, but continuous current must remain ≤20mA per channel to avoid thermal runaway or parametric shift in the DG309CY's CMOS switch structure.
How does DG309CY handle analog signals exceeding supply rails?
DG309CY does not tolerate analog signals beyond its supply rails: Absolute Maximum Ratings specify that analog voltage must stay within V− and V+. Exceeding these limits risks latch-up or permanent damage. For overvoltage-tolerant switching, external clamping diodes or dedicated fault-protected switches-not DG309CY-are required to protect the device.
Is DG309CY pin-compatible with DG308ACY?
No-DG309CY and DG308ACY share identical pinout and package but differ in logic function: DG308ACY is normally open (NO), while DG309CY is normally closed (NC). Swapping them requires inverting all four control signals. Both parts use the same 16-pin narrow SO footprint, but functional substitution demands firmware or hardware logic modification to maintain correct signal path behavior.
DG309CY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Switch Circuit:
- SPST - NC
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 4
- On-State Resistance (Max):
- 100Ohm
- Channel-to-Channel Matching (ΔRon):
- -
- Voltage - Supply, Single (V+):
- 5V ~ 30V
- Voltage - Supply, Dual (V±):
- ±5V ~ 20V
- Switch Time (Ton, Toff) (Max):
- 250ns, 150ns
- -3db Bandwidth:
- -
- Charge Injection:
- -10pC
- Channel Capacitance (CS(off), CD(off)):
- 11pF, 8pF
- Current - Leakage (IS(off)) (Max):
- 5nA
- Crosstalk:
- -
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
DG309CY FAQ
1.How can I place an order for DG309CY through Aetrix?
Please submit a Request for Quotation (RFQ) for DG309CY 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 DG309CY reliable?
The price and inventory of DG309CY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG309CY is usually 5 days.
3.What payment methods are accepted for DG309CY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG309CY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG309CY?
DG309CY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG309CY 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 DG309CY?
For technical support, including DG309CY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG309CY requirements.
6.How does Aetrix verify that DG309CY is sourced from the original manufacturer or authorized distributors?
All DG309CY 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 DG309CY meets industry standards.
7.What is the process for return or replacement of DG309CY?
All DG309CY units undergo pre-shipment inspection (PSI). If there is an issue with DG309CY, 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 DG309CY part is unused and in its original packaging.
Return procedure for DG309CY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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