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Analog Devices Inc./Maxim Integrated MAX395EWG+T
- Part No.:
- MAX395EWG+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX395EWG+T.pdf
- Description:
- IC SW SPST-NOX8 100OHM 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,804
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Product details
Overview
MAX395EWG+T from Maxim Integrated is an 8-channel, serially controlled, single-pole/single-throw (SPST) CMOS analog switch with rail-to-rail signal handling, 100Ω max on-resistance (±5V supplies), 5Ω max channel-to-channel on-resistance match, and <0.1nA off-leakage at +25°C. It operates from ±2.7V to ±8V dual supplies or +2.7V to +16V single supply, and is used in precision serial data-acquisition and audio signal routing systems.
For engineers reviewing the MAX395EWG+T datasheet, MAX395EWG+T pinout, MAX395EWG+T application, or MAX395EWG+T equivalent, key selection criteria include SPI/QSPI/Microwire™ compatibility, daisy-chainable serial interface, guaranteed on-resistance flatness (≤15Ω over ±3V signal range), -40°C to +85°C industrial temperature rating, and 24-pin wide SOIC (WG) package with verified pinout and thermal derating (941mW at +70°C).
Technical Context
The MAX395EWG+T implements an 8-bit shift register interface synchronized to SCLK rising edges, with CS-controlled latching on its rising edge-fully compliant with SPI Mode 0 (CPOL=0, CPHA=0) and Microwire™ standards. Its internal logic drives eight independent SPST switches via parallel latch outputs, supporting asynchronous RESET for global switch-off and shift-register reset.
All NO/COM terminals are bidirectional and electrically interchangeable; analog signals pass equally well in either direction. The device features >2kV HBM ESD protection, TTL/CMOS-compatible digital inputs (0.8V–2.4V thresholds with ±5V or +5V supplies), and guaranteed break-before-make timing (15ns typical) to prevent signal shorting during channel transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance (RON) | 100Ω max at ±5V supplies - ensures minimal signal attenuation and gain error in precision analog paths |
| On-Resistance Match (∆RON) | 5Ω max between channels - enables accurate channel-to-channel signal balancing in multiplexer applications |
| On-Resistance Flatness (RFLAT) | 15Ω max over ±3V signal range - maintains consistent insertion loss across full analog input swing |
| Off-Leakage Current | 0.1nA max at +25°C - preserves high-impedance node integrity in sample-and-hold or sensor front-ends |
| Supply Range | ±2.7V to ±8V dual or +2.7V to +16V single - supports legacy ±5V, modern low-voltage (3V), and high-voltage industrial rails |
| Switch Turn-On/Off Time | 200ns/90ns typical (dual ±5V) - enables sub-microsecond channel switching for high-speed data acquisition |
| ESD Protection | >2kV per Method 3015.7 - provides robust handling in manufacturing and field-deployed instrumentation |
Pinout & Package
MAX395EWG+T is housed in a 24-pin Wide SOIC (SO) package (WG suffix), with 1.27mm pitch, 7.5mm body width, and specified thermal derating of 11.76mW/°C above +70°C (941mW max at +70°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCLK (Pin 1) | Serial clock input | Synchronizes DIN data into internal 8-bit shift register on rising edge; compatible with SPI/QSPI/Microwire™ |
| V+ (Pin 2) | Positive analog supply | Sets upper analog signal limit; must be ≥ VCOM/NO voltage + 0.3V to avoid ESD diode conduction |
| DIN (Pin 3) | Serial data input | Accepts 8-bit control word; D7 is MSB and first bit shifted in during CS low period |
| GND (Pin 4) | Digital ground reference | Reference for all digital inputs (SCLK, DIN, CS, RESET); analog signals float between V+ and V- |
| NO0–NO7 (Pins 5,7,9,11,14,16,18,20) | Normally open switch terminals | Bidirectional analog I/O; interchangeable with COMx pins; each pairs with corresponding COMx for SPST operation |
| COM0–COM7 (Pins 6,8,10,12,13,15,17,19) | Common switch terminals | Bidirectional analog I/O; paired with NOx to form eight independent SPST switches |
| V- (Pin 21) | Negative analog supply | Sets lower analog signal limit; connect to GND for single-supply operation (+2.7V to +16V) |
| DOUT (Pin 22) | Serial data output | Shift register Q7 output; enables daisy-chaining multiple MAX395EWG+T devices without external logic |
| RESET (Pin 23) | Asynchronous reset input | Active-low; forces all switches OFF and clears shift register regardless of CS/SCLK state |
| CS (Pin 24) | Chip-select input | Active-low; latches 8-bit shift register contents to parallel switch control on rising edge |
Key Features
| Feature | Design Value |
|---|---|
| SPI/QSPI/Microwire™-compatible interface | Eliminates need for parallel address/data buses; reduces PCB trace count and microcontroller GPIO usage |
| Rail-to-rail analog signal handling | Supports full-swing signals from V− to V+, enabling direct interfacing with op-amps, ADCs, and DACs without level-shifting |
| Pin compatibility with MAX335 | Enables drop-in replacement in existing designs using industry-standard 24-pin SOIC footprint and signal mapping |
| Daisy-chainable DOUT output | Allows cascading of multiple MAX395EWG+T devices with single SCLK/DIN/CS lines-reducing system-level wiring complexity |
| Guaranteed break-before-make timing | 15ns typical delay prevents momentary short-circuit between channels during reconfiguration-critical for fault-tolerant routing |
| TTL/CMOS logic compatibility | 0.8V–2.4V input thresholds ensure reliable operation with both 3.3V and 5V microcontrollers without external level translators |
Applications
| Serial Data-Acquisition Systems | Industrial Process Control |
|---|---|
Use Scenario: Multiplexing 8 sensor inputs (thermocouples, RTDs) into a single high-resolution ADC in PLC modules. IC Role / Device Role / Timing Role: Precision SPST analog switch providing low-on-resistance, low-leakage signal path selection under microcontroller serial control. Use Value: 100Ω RON and <0.1nA leakage preserve measurement accuracy; daisy-chaining supports scalable multi-slot backplane architectures. |
Use Scenario: Routing analog setpoint and feedback signals in closed-loop motor drive cabinets with ±15V power rails. IC Role / Device Role / Timing Role: Rail-to-rail SPST switch enabling bipolar signal switching without external biasing or clamping networks. Use Value: ±2.7V to ±8V dual-supply operation matches industrial power domains; 2kV ESD withstand protects against field-induced transients. |
| Avionics Signal Management | Professional Audio Routing |
Use Scenario: Configurable signal path selection in flight data recorder analog front-end with strict -55°C to +125°C qualification requirements. IC Role / Device Role / Timing Role: High-reliability SPST switch with extended temperature grade (MAX395MRG variant), though EWG+T supports -40°C to +85°C for non-military avionics subsystems. Use Value: Guaranteed RON flatness (≤15Ω) ensures consistent channel gain across wide temperature range; RESET pin enables fail-safe signal isolation. |
Use Scenario: Digital-console-controlled analog audio matrix routing (mic preamp → EQ → dynamics → output bus). IC Role / Device Role / Timing Role: Low-distortion SPST switch with <−90dB crosstalk and −90dB off-isolation minimizing inter-channel bleed. Use Value: 100Ω RON and matched channels maintain balanced line-level integrity; SPI interface allows real-time reconfiguration via FPGA or ARM host. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-channel serial SPST switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX395CWG+ | 0°C to +70°C commercial temperature range; identical pinout, electrical specs, and SOIC-24 package | Not qualified for industrial environments requiring -40°C startup or sustained +85°C operation | Select MAX395EWG+T when operating ambient exceeds 70°C or requires extended temperature margin |
| MAX335EWP+ | Pin-compatible but parallel-input (not serial); 8-channel SPST with TTL/CMOS-compatible enable inputs; no shift register or DOUT | Lacks daisy-chaining, SPI interface, and software-configurable sequencing-requires more GPIOs and board space | Choose MAX335EWP+ only if system lacks serial interface resources and prioritizes deterministic parallel control over routing flexibility |
Compared with MAX395CWG+, the MAX395EWG+T adds industrial temperature support without sacrificing performance or footprint; versus MAX335EWP+, it trades parallel simplicity for serial scalability, reduced pin count, and dynamic reconfiguration capability-making it optimal for space-constrained, software-defined signal routing.
Availability
MAX395EWG+T is available at Aetrix Electronics and suitable for serial data-acquisition systems, industrial process-control cabinets, and professional audio routing platforms requiring stable component supply, long-term lifecycle assurance, and verified second-source alternatives.
Supply support for MAX395EWG+T 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 fabless semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, automotive, communications, and computing markets.
The MAX395 belongs to Maxim's precision analog switch product line, designed specifically for applications demanding low on-resistance, ultra-low leakage, rail-to-rail operation, and serial configurability in harsh or space-constrained environments.
FAQ
What is the maximum supply voltage range supported by the MAX395EWG+T?
The MAX395EWG+T supports dual supplies from ±2.7V to ±8V or a single supply from +2.7V to +16V. Absolute maximum ratings allow V+ up to +17V and V− down to −17V, but continuous operation beyond ±8V or +16V is not specified. Operation at ±5V yields optimal on-resistance (100Ω max) and leakage (<0.1nA at +25°C), making it ideal for standard industrial and test equipment rails.
Does the MAX395EWG+T support daisy-chaining with other MAX395 devices?
Yes, the MAX395EWG+T supports daisy-chaining via its DOUT pin (Pin 22), which outputs the Q7 bit of the internal 8-bit shift register on SCLK falling edges. By connecting DOUT of one MAX395EWG+T to DIN of the next and tying all CS and SCLK lines together, up to N devices can be configured with a single 8×N-bit serial stream-enabling synchronized switching across large-scale analog matrices without additional logic.
How does the RESET pin function on the MAX395EWG+T?
The RESET pin (Pin 23) is an asynchronous active-low input that forces all eight SPST switches to the OFF state and resets the internal shift register to zero, regardless of CS or SCLK state. It must be driven between GND and V+ (not beyond), and is typically tied to a system supervisor or microcontroller GPIO. This feature provides deterministic fail-safe behavior during power-up, brownout, or fault recovery sequences in the MAX395EWG+T.
Is the MAX395EWG+T pin-compatible with the MAX335?
Yes, the MAX395EWG+T is explicitly stated as pin-compatible with the industry-standard MAX335 in the datasheet. Both use the same 24-pin SOIC (WG) package, identical pin assignments for SCLK, DIN, CS, RESET, V+, V−, GND, DOUT, and all NOx/COMx terminals. This allows direct substitution in legacy MAX335 designs-adding serial control and daisy-chaining capability without PCB layout changes.
What is the guaranteed on-resistance match between channels in the MAX395EWG+T?
The MAX395EWG+T guarantees ≤5Ω maximum difference in on-resistance (∆RON = RONmax − RONmin) between any two channels under ±5V supply conditions and ±3V analog signal range. This tight matching ensures uniform gain and offset across all eight switched paths-critical for precision multiplexing, calibration routines, and differential signal routing where channel consistency directly impacts measurement fidelity in the MAX395EWG+T.
MAX395EWG+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Switch Circuit:
- SPST - NO
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 8
- On-State Resistance (Max):
- 100Ohm
- Channel-to-Channel Matching (ΔRon):
- 5Ohm (Max)
- Voltage - Supply, Single (V+):
- 2.7V ~ 16V
- Voltage - Supply, Dual (V±):
- ±2.7V ~ 8V
- Switch Time (Ton, Toff) (Max):
- 400ns, 400ns
- -3db Bandwidth:
- -
- Charge Injection:
- 2pC
- Channel Capacitance (CS(off), CD(off)):
- 2pF, 2pF
- Current - Leakage (IS(off)) (Max):
- 100pA
- Crosstalk:
- -90dB @ 100kHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SOIC
MAX395EWG+T FAQ
1.How can I place an order for MAX395EWG+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX395EWG+T 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 MAX395EWG+T reliable?
The price and inventory of MAX395EWG+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX395EWG+T is usually 5 days.
3.What payment methods are accepted for MAX395EWG+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX395EWG+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX395EWG+T?
MAX395EWG+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX395EWG+T 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 MAX395EWG+T?
For technical support, including MAX395EWG+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX395EWG+T requirements.
6.How does Aetrix verify that MAX395EWG+T is sourced from the original manufacturer or authorized distributors?
All MAX395EWG+T 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 MAX395EWG+T meets industry standards.
7.What is the process for return or replacement of MAX395EWG+T?
All MAX395EWG+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX395EWG+T, 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 MAX395EWG+T part is unused and in its original packaging.
Return procedure for MAX395EWG+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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