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Analog Devices Inc./Maxim Integrated MAX394EPP
- Part No.:
- MAX394EPP
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX394EPP.pdf
- Description:
- IC SWITCH SPDT X 4 35OHM 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,507
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Product details
Overview
MAX394EPP from Analog Devices is a precision quad SPDT analog switch optimized for rail-to-rail signal routing in portable and industrial systems. It operates from ±2.7V to ±8V bipolar or +2.7V to +15V single supply, delivers <35Ω max on-resistance with <2Ω channel matching, <4Ω on-resistance flatness, and <10pC charge injection-enabling low-distortion audio and test-signal switching in handheld instruments and communications equipment.
For engineers reviewing the MAX394EPP datasheet, MAX394EPP pinout, MAX394EPP application, or MAX394EPP equivalent, key selection criteria include guaranteed -40°C to +85°C operation, 20-pin plastic DIP package, break-before-make timing (10ns typ), sub-75ns turn-off, and TTL/CMOS-compatible logic inputs with rail-to-rail analog handling up to ±8V.
Technical Context
The MAX394EPP integrates four independent CMOS SPDT switches fabricated using low-voltage silicon-gate process, supporting both single- and dual-supply configurations without level-shifting circuitry. Its internal architecture guarantees matched on-resistance across channels and minimal variation over full analog signal range (V– to V+), critical for precision multiplexing and gain-switching applications.
Logic inputs are compatible with TTL and CMOS families across supply voltages: +0.8V to +2.4V for V+ ≤ +8V, extending to +0.8V to +4V for higher supplies. All analog pins (COM, NO, NC, IN) tolerate signals from V– –2V to V+ +2V, with internal clamping diodes limiting forward current to 30mA continuous.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | ±2.7V to ±8V (bipolar) or +2.7V to +15V (single); enables flexible power architecture in battery-powered and line-powered systems. |
| On-Resistance (max) | 35Ω at ±4.5V; ensures minimal signal attenuation and thermal drift in precision analog paths. |
| On-Resistance Match | <2Ω between channels; maintains consistent gain/attenuation across switched signal paths in multi-channel instrumentation. |
| Charge Injection | <10pC; reduces voltage glitch and settling error in sample-and-hold and data-acquisition circuits. |
| Turn-Off Time | <75ns (typ); supports high-speed signal routing in automated test equipment and digital comms front-ends. |
| ESD Rating | >2000V per Method 3015.7; provides robust handling during board assembly and field service without external protection. |
| Operating Temp | -40°C to +85°C; qualified for extended industrial and automotive under-hood environments. |
Pinout & Package
MAX394EPP is housed in a 20-pin plastic DIP (P20-4) package with through-hole mounting and 0.300" wide body. Pin 15 is not internally connected (N.C.). Substrate is tied to V+.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 10, 11, 20 | IN1–IN4 | Logic-level control inputs; TTL/CMOS compatible, drive SPDT state of corresponding switch. |
| 2, 9, 12, 19 | NO1–NO4 | Normally open switch terminals; connect to COM when IN = logic high. |
| 3, 8, 13, 18 | COM1–COM4 | Common poles; carry routed analog signal; support rail-to-rail swing from V– to V+. |
| 4, 7, 14, 17 | NC1–NC4 | Normally closed switch terminals; connect to COM when IN = logic low. |
| 5 | V– | Negative supply rail; must be applied before analog signals in dual-supply sequencing. |
| 6 | GND | Ground reference; common return for logic and analog sections. |
| 15 | N.C. | No internal connection; leave unconnected or grounded per layout best practice. |
| 16 | V+ | Positive supply rail; substrate tied to this pin; apply after V– in dual-supply startup. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail analog signal handling | Supports input/output signals from V– to V+ without clipping-essential for full-scale audio and sensor signal routing. |
| Break-before-make switching | 10ns typical delay prevents momentary short-circuit between NC and NO paths-critical for avoiding signal transients in sensitive measurement systems. |
| Guaranteed <2.5nA off-leakage at +85°C | Minimizes DC error in high-impedance sensor interfaces and precision integrators over full temperature range. |
| Low quiescent current (<1μA) | Enables always-on signal routing in battery-operated devices without compromising runtime. |
| Pin compatibility with MAX333/MAX333A | Allows drop-in replacement in legacy designs using earlier-generation quad SPDT switches without PCB revision. |
Applications
| Test Equipment | Communications Systems |
|---|---|
Use Scenario: Automated test fixture routing multiple sensor inputs to a shared ADC channel. IC Role / Device Role / Timing Role: Quad SPDT switch selects one of four differential sensor outputs while maintaining signal integrity and low crosstalk. Use Value: Guaranteed <4Ω on-resistance flatness ensures consistent gain across all channels; <10pC charge injection prevents baseline shift during multiplexed sampling. |
Use Scenario: Signal path selection in RF front-end module for multi-band transceiver calibration. IC Role / Device Role / Timing Role: Low-capacitance analog switch routes LO or IF signals between filters, amplifiers, and mixers under microcontroller control. Use Value: 12pF off-capacitance and 88dBm crosstalk at 1MHz minimize interference between adjacent signal paths during reconfiguration. |
| PBX/PABX Systems | Portable Instruments |
Use Scenario: Audio path management in enterprise VoIP phone base station with headset, speakerphone, and line interface. IC Role / Device Role / Timing Role: Four independent SPDT switches route analog voice signals between audio codecs, amplifiers, and jacks. Use Value: <35Ω on-resistance and rail-to-rail capability preserve dynamic range across 0–3.3V and ±5V audio rails; ESD >2000V withstands frequent connector insertion. |
Use Scenario: Battery-powered handheld multimeter with auto-ranging analog front-end. IC Role / Device Role / Timing Role: Precision switch configures input attenuators, shunt resistors, and reference paths under MCU control. Use Value: <2Ω channel matching eliminates calibration drift between ranges; <1μA quiescent current extends battery life in sleep mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad SPDT analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX333AEPP | Higher on-resistance (45Ω max), wider temp range (-55°C to +125°C), same 20-pin DIP package. | Better suited for military/aerospace where extended temperature and radiation tolerance are required. | Select MAX333AEPP only if operating beyond +85°C or requiring MIL-STD-883 screening; otherwise MAX394EPP offers lower RON and tighter matching. |
| ADG1414BRUZ | Lower on-resistance (1.8Ω typ), but requires ≥±4.5V dual supply or ≥9V single supply; 20-pin TSSOP only. | Preferred for high-precision, low-noise instrumentation where ultra-low RON and THD matter more than supply flexibility. | Choose ADG1414BRUZ when minimizing signal path resistance is critical and supply constraints allow; MAX394EPP better fits low-voltage portable designs. |
Compared with MAX333AEPP and ADG1414BRUZ, the MAX394EPP uniquely balances low on-resistance (<35Ω), wide supply range (+2.7V to +15V / ±2.7V to ±8V), and industrial temperature rating in a through-hole DIP package-making it optimal for cost-sensitive, field-serviceable, and mixed-supply embedded systems.
Availability
MAX394EPP is available at Aetrix Electronics and suitable for test equipment, communications infrastructure, PBX systems, and portable instrumentation requiring stable component supply across extended temperature and long production lifecycles.
Supply support for MAX394EPP 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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
The MAX394EPP belongs to Analog Devices' precision analog switch product line, engineered for low distortion, high channel matching, and robust operation in portable and industrial signal routing applications.
FAQ
What is the maximum supply voltage rating for MAX394EPP?
The MAX394EPP has an absolute maximum V+ to V– rating of 17V. For bipolar operation, it supports ±2.7V to ±8V supplies; for single-supply use, +2.7V to +15V is permitted. Exceeding these limits risks permanent damage. The MAX394EPP datasheet specifies that V+ must not exceed +17V relative to V–, and each supply rail must stay within -0.3V to +17V referenced to GND.
Does MAX394EPP support rail-to-rail analog signal switching?
Yes, the MAX394EPP supports true rail-to-rail analog signal handling: its COM, NO, and NC pins accept signals from V– to V+ without damage or performance degradation. This capability is enabled by internal level-shifting and clamping structures, and is explicitly guaranteed across the full -40°C to +85°C operating range of the MAX394EPP.
What is the guaranteed on-resistance matching between channels for MAX394EPP?
The MAX394EPP guarantees on-resistance matching of less than 2Ω between any two channels at +25°C, and less than 4Ω across the full -40°C to +85°C temperature range. This specification is measured under defined conditions (V+ = 5V, V– = –5V, ICOM = 10mA, VNO/VNC = ±3V) and is critical for gain-matched multiplexing in precision instrumentation using the MAX394EPP.
Can MAX394EPP operate from a single 3.3V supply?
Yes, the MAX394EPP operates from a single +2.7V to +15V supply, including +3.3V. At +3.3V, typical on-resistance rises to 75–185Ω (depending on signal voltage), and dynamic parameters such as tON increase to 400ns (typ). These values are fully characterized and guaranteed in the MAX394EPP datasheet's "Single +3.3V Supply" section.
Is MAX394EPP pin-compatible with other Maxim analog switches?
Yes, the MAX394EPP is pin-compatible with the MAX333 and MAX333A in the same 20-pin DIP package. This allows direct substitution in legacy designs without PCB changes. However, note that MAX333A has higher on-resistance (45Ω max) and different leakage specs-so functional equivalence depends on system-level tolerance for those parameters in the MAX394EPP application.
MAX394EPP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Switch Circuit:
- SPDT
- Multiplexer/Demultiplexer Circuit:
- 2:1
- Number of Circuits:
- 4
- On-State Resistance (Max):
- 35Ohm
- Channel-to-Channel Matching (ΔRon):
- 500mOhm
- Voltage - Supply, Single (V+):
- 2.7V ~ 15V
- Voltage - Supply, Dual (V±):
- ±2.7V ~ 8V
- Switch Time (Ton, Toff) (Max):
- 130ns, 75ns
- -3db Bandwidth:
- -
- Charge Injection:
- 5pC
- Channel Capacitance (CS(off), CD(off)):
- 12pF, 12pF
- Current - Leakage (IS(off)) (Max):
- 200pA
- Crosstalk:
- -88dB @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 20-PDIP
MAX394EPP FAQ
1.How can I place an order for MAX394EPP through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX394EPP 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 MAX394EPP reliable?
The price and inventory of MAX394EPP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX394EPP is usually 5 days.
3.What payment methods are accepted for MAX394EPP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX394EPP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX394EPP?
MAX394EPP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX394EPP 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 MAX394EPP?
For technical support, including MAX394EPP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX394EPP requirements.
6.How does Aetrix verify that MAX394EPP is sourced from the original manufacturer or authorized distributors?
All MAX394EPP 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 MAX394EPP meets industry standards.
7.What is the process for return or replacement of MAX394EPP?
All MAX394EPP units undergo pre-shipment inspection (PSI). If there is an issue with MAX394EPP, 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 MAX394EPP part is unused and in its original packaging.
Return procedure for MAX394EPP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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