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DG445CY
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Product Detailed Parameters
- Description：IC SWITCH SPST-NOX4 85OHM 16SOIC
- Series：-
- Mfr：Analog Devices Inc./Maxim Integrated
- Package：Tube
- Switch Circuit：SPST - NO
- Multiplexer/Demultiplexer Circuit：1:01
- On-State Resistance (Max)：85Ohm
- Channel-to-Channel Matching (ΔRon)：4Ohm (Max)
- Voltage - Supply, Single (V+)：10V ~ 30V
- Voltage - Supply, Dual (V±)：±4.5V ~ 20V
- Switch Time (Ton, Toff) (Max)：250ns, 170ns
- -3db Bandwidth：-
- Charge Injection：5pC
- Channel Capacitance (CS(off), CD(off))：4pF, 4pF
- Current - Leakage (IS(off)) (Max)：500pA
- Crosstalk：-100dB @ 1MHz
- Operating Temperature：0°C ~ 70°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 DG445CY is a quad, single-pole/single-throw (SPST) analog switch manufactured by Analog Devices Inc./Maxim Integrated. It features four normally open switches with an on-resistance of 85 ohms maximum and an on-resistance match between channels of 4 ohms maximum. The device operates from a single +10V to +30V supply or bipolar ±4.5V to ±20V supplies. Key electrical characteristics include a turn-on time of less than 250ns, a turn-off time of less than 70ns, charge injection of 10pC maximum, and off-leakage current of less than 5nA at +85°C. It is housed in a 16-pin Narrow SO package and supports an operating temperature range of 0°C to +70°C.
Feature Summary
- Features improved on-resistance matching between channels and guaranteed on-resistance flatness over the signal range.
- Offers low power consumption and electrostatic discharge tolerance of 2000V minimum per Method 3015.7.
- Provides rail-to-rail signal handling capability with TTL/CMOS-logic compatibility.
Applications
- Sample-and-Hold Circuits
- Test Equipment
- Heads-Up Displays
- Guidance and Control Systems
Procurement Notes
Verify the specific ordering suffix against official manufacturer documentation to confirm package type and temperature range. Ensure that the component meets all required environmental standards for the intended application environment before finalizing procurement decisions.
Selection Notes
Select this component when a quad SPST configuration with normally open logic is required. Consider the narrow SOIC package constraints and the specified bipolar or unipolar supply voltage ranges during circuit design to ensure optimal performance within the defined operational limits.
Part Context
This part belongs to the DG444/DG445 family of improved quad SPST analog switches. The DG445 variant specifically provides four normally open switches, whereas the DG444 offers four normally closed switches. Both share similar electrical characteristics and fabrication processes.
Replacement Considerations
The DG445CJ serves as a direct pin-compatible alternative in a Plastic DIP package. Other variants such as the DG445DJ and DG445DY offer extended temperature ranges but utilize different packaging options compared to the Narrow SO format.
FAQ
What is the difference between the DG444 and DG445?
The DG444 contains four normally closed switches, while the DG445 contains four normally open switches. All other electrical specifications remain identical.
How does the DG445CY handle overvoltage protection?
Signals on S, D, or IN exceeding V+ or V- are clamped by internal diodes. For proper sequencing, V+ should be powered on first, followed by VL, V-, and logic inputs.
