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Analog Devices Inc./Maxim Integrated MAX338ETE+T
- Part No.:
- MAX338ETE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
MAX338ETE+T.pdf
- Description:
- IC MUX 8:1 400OHM 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,783
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Product details
Overview
The MAX338ETE+T from Maxim Integrated is an 8-channel single-ended CMOS analog multiplexer designed to route one of eight bidirectional analog inputs to a common COM terminal under 3-bit binary address control (A0–A2), with TTL/CMOS-compatible enable (EN) and address inputs. It operates from ±4.5V to ±20V dual supplies or +4.5V to +30V single supply, features 400Ω max on-resistance, <20pA NO-off leakage at +25°C, and 1.5pC typical charge injection-enabling precision signal routing in data-acquisition and test equipment.
For engineers reviewing the MAX338ETE+T datasheet, MAX338ETE+T pinout, MAX338ETE+T application, or MAX338ETE+T equivalent, key selection criteria include rail-to-rail analog signal handling (±15V), guaranteed low leakage across -40°C to +85°C, TQFN-EP package thermal performance, and compatibility with legacy DG508A layouts while delivering improved ESD robustness (>2000V).
Technical Context
The MAX338ETE+T implements a monolithic silicon-gate CMOS switch architecture with integrated decode logic, supporting both multiplexing and demultiplexing modes. Its bidirectional conduction, break-before-make switching (10–140ns), and rail-to-rail signal range (V− to V+) allow seamless integration into bipolar and single-supply systems without level-shifting.
All digital inputs-including EN, A0, A1, and A2-are TTL-compatible over full temperature and supply ranges (±4.5V to ±18V), and internal clamping diodes protect NO/COM terminals against signals exceeding V+ or V−. The device is fabricated using Maxim's 44V process, enabling operation with unbalanced supplies (e.g., +24V/−5V) as long as |V+ − V−| ≤ 44V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance | 400Ω max at TA = +25°C (ensures minimal voltage drop and gain error in precision sensor or DAC/ADC interfaces) |
| NO-Off Leakage Current | <20pA at +25°C (preserves high-impedance node integrity in sample-and-hold and high-resolution data acquisition) |
| Charge Injection | 1.5pC typ (limits voltage glitch on sampled capacitors, critical for low-distortion ADC front-ends) |
| Transition Time | <500ns (supports >1MHz multiplexed signal bandwidth in real-time test instrumentation) |
| Analog Signal Range | ±15V with ±15V supplies (enables direct interfacing with industrial ±10V sensors and military-grade signal chains) |
| ESD Protection | >2000V per Method 3015.7 (reduces board-level transient suppression requirements in ruggedized equipment) |
| Supply Range | ±4.5V to ±20V dual or +4.5V to +30V single (allows flexible power architecture design without external regulators) |
Pinout & Package
The MAX338ETE+T is housed in a 16-pin TQFN-EP package (5mm × 5mm) with exposed pad (EP) that must be connected to V+ for optimal thermal performance and EMI suppression.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | V− | Negative supply rail input; sets lower bound of analog signal range and bias for internal switches |
| 2–5 | NO1–NO4 | Bidirectional analog input channels; routed to COM when selected by A0–A2 and EN = high |
| 6 | COM | Common analog I/O terminal; serves as output in mux mode or input in demux mode |
| 7–10 | NO8–NO5 | Bidirectional analog input channels; numbered in reverse physical order to match functional truth table |
| 11 | V+ | Positive supply rail input; sets upper bound of analog signal range and powers internal logic |
| 12 | GND | Digital ground reference for TTL/CMOS control inputs; separate from analog return paths |
| 13 | A2 | MSB address input; determines channel group selection in 3-bit binary decoding |
| 14 | A1 | Mid-bit address input; used with A0/A2 to select one of eight channels |
| 15 | A0 | LSB address input; completes 3-bit channel selection code (000–111) |
| 16 | EN | Active-high enable; disables all switches when low, placing NOx and COM in high-impedance off-state |
| EP (Exposed Pad) | Thermal & Electrical Reference | Must be soldered to V+ plane; improves thermal dissipation (derating: 20.8mW/°C above +70°C) and reduces ground bounce |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail signal handling | Supports analog signals from V− to V+ without clipping-enables direct connection to ±10V industrial sensors and op-amp outputs |
| Guaranteed low charge injection (1.5pC typ) | Minimizes sampling errors in precision S/H circuits and reduces need for post-switching settling delay |
| TTL/CMOS-compatible control inputs | Operates reliably with standard microcontroller GPIOs across full temperature and supply ranges-no level shifters required |
| Pin-compatible upgrade for DG508A | Direct PCB replacement for legacy designs, preserving layout while improving leakage, ESD, and charge injection specs |
| Low on-resistance matching (≤10Ω) | Ensures consistent gain and offset across channels in multi-sensor scanning systems |
Applications
| Data-Acquisition Systems | Test Equipment |
|---|---|
Use Scenario: Scanning multiple thermocouple or strain-gauge inputs into a single high-resolution ADC. IC Role / Device Role / Timing Role: Analog multiplexer providing low-leakage, low-charge-injection signal routing between sensors and ADC front-end. Use Value: Sub-20pA off-leakage prevents DC offset drift; 400Ω RON ensures <0.01% gain error at 10kΩ source impedance. |
Use Scenario: Automated test fixture routing calibrated reference voltages and DUT signals to measurement instruments. IC Role / Device Role / Timing Role: Precision analog switch enabling fast, repeatable channel selection under microcontroller control. Use Value: <500ns transition time supports >1MHz test sequencing; rail-to-rail range accommodates ±12V instrument I/O standards. |
| Military Radios | Guidance and Control Systems |
Use Scenario: Selecting between multiple RF front-end calibration paths or antenna diversity inputs in wide-temperature radios. IC Role / Device Role / Timing Role: High-reliability analog mux operating across -40°C to +85°C with ESD-hardened I/O. Use Value: >2000V HBM ESD rating reduces field failures; extended temp grade ensures stable RON and leakage in avionics bays. |
Use Scenario: Multiplexing inertial sensor outputs (gyros, accelerometers) into navigation processor ADCs. IC Role / Device Role / Timing Role: Low-noise, low-distortion analog switch preserving signal fidelity in closed-loop guidance loops. Use Value: 1.5pC charge injection prevents step-induced errors in integrator-based attitude estimation; 10Ω RON matching maintains channel-to-channel coherence. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX328ESE+ | Lower NO-off leakage (5pA max) and charge injection (0.5pC typ), but higher on-resistance (1200Ω max) | Better for ultra-high-Z sample-and-hold; unsuitable for low-impedance sensor arrays requiring <500Ω RON | Select MAX328ESE+ only when leakage dominates system error budget and source impedance is >100kΩ. |
| DG508ACJ+ | Legacy industry-standard pinout; higher leakage (100pA), no ESD rating, no guaranteed charge injection spec | Acceptable for non-critical commercial test gear; lacks MIL-STD-883 qualification and thermal robustness | Choose DG508ACJ+ only for cost-sensitive, non-ruggedized designs where MAX338ETE+T's enhanced specs provide no measurable benefit. |
Compared with MAX328ESE+, the MAX338ETE+T trades leakage performance for lower on-resistance and faster switching-making it preferable for medium-impedance, bandwidth-constrained applications. Against DG508ACJ+, it delivers verified ESD protection, tighter parametric guarantees, and extended temperature support without PCB redesign.
Availability
MAX338ETE+T is available at Aetrix Electronics and suitable for data-acquisition systems, automated test equipment, and military radio subsystems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX338ETE+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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and aerospace markets.
The MAX338 series belongs to Maxim's precision analog switch product line, engineered for low-leakage, low-charge-injection signal routing in demanding measurement and control applications where accuracy and reliability are critical.
FAQ
What is the maximum allowable voltage difference between V+ and V− for the MAX338ETE+T?
The MAX338ETE+T specifies an absolute maximum |V+ − V−| of 44V. This allows operation with unbalanced supplies-for example, +24V and −5V-as long as their difference remains within this limit. Exceeding 44V risks permanent damage, regardless of individual rail ratings. The MAX338ETE+T datasheet confirms this in the Absolute Maximum Ratings table on page 2.
Can the MAX338ETE+T operate with a single +12V supply, and how should V− be connected?
Yes, the MAX338ETE+T supports single-supply operation from +4.5V to +30V. When using +12V, connect V− to GND (not left floating). This configures the analog signal range from 0V to +12V and enables rail-to-rail switching. The device's internal logic remains fully functional, and all control inputs retain TTL compatibility. This configuration is explicitly validated in the "Electrical Characteristics-Single Supply" section (page 4) of the MAX338ETE+T datasheet.
Is the exposed pad (EP) on the MAX338ETE+T electrically connected, and how must it be handled on the PCB?
Yes, the exposed pad (EP) on the MAX338ETE+T is internally connected to V+. It must be soldered to a PCB copper area tied directly to the V+ net-not left floating or grounded. Doing so improves thermal resistance by ~30°C/W and reduces high-frequency noise coupling. The MAX338ETE+T datasheet states "Connect EP to V+" in the Pin Description table (page 6) and specifies thermal derating (20.8mW/°C) based on this connection.
Does the MAX338ETE+T support break-before-make switching, and what is its typical interval?
Yes, the MAX338ETE+T guarantees break-before-make operation to prevent momentary shorting between channels. Its break-before-make interval (tOPEN) is specified as 10ns to 140ns at +25°C, ensuring reliable isolation during channel transitions. This behavior is confirmed in the "Dynamic" section of the Electrical Characteristics table (page 2) and illustrated in Figure 4 of the MAX338ETE+T datasheet.
How does the on-resistance (RON) of the MAX338ETE+T vary with temperature and supply voltage?
The MAX338ETE+T's on-resistance increases with temperature and decreases with higher supply voltages. At ±15V and +25°C, RON is 220Ω typ / 400Ω max; at −55°C it drops to ~180Ω, and at +125°C it rises to ~500Ω. With +12V single supply, RON is 460Ω typ. These dependencies are plotted in Figures TOC-01, TOC-02, and TOC-03 of the MAX338ETE+T datasheet, confirming monotonic variation across operating conditions.
MAX338ETE+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Switch Circuit:
- -
- Multiplexer/Demultiplexer Circuit:
- 8:1
- Number of Circuits:
- 1
- On-State Resistance (Max):
- 400Ohm
- Channel-to-Channel Matching (ΔRon):
- 4Ohm
- Voltage - Supply, Single (V+):
- 4.5V ~ 30V
- Voltage - Supply, Dual (V±):
- ±4.5V ~ 20V
- Switch Time (Ton, Toff) (Max):
- 500ns, 500ns
- -3db Bandwidth:
- -
- Charge Injection:
- 1.5pC
- Channel Capacitance (CS(off), CD(off)):
- 3pF, 11pF
- Current - Leakage (IS(off)) (Max):
- 20pA
- Crosstalk:
- -92dB @ 100kHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TQFN (5x5)
MAX338ETE+T FAQ
1.How can I place an order for MAX338ETE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX338ETE+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 MAX338ETE+T reliable?
The price and inventory of MAX338ETE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX338ETE+T is usually 5 days.
3.What payment methods are accepted for MAX338ETE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX338ETE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX338ETE+T?
MAX338ETE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX338ETE+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 MAX338ETE+T?
For technical support, including MAX338ETE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX338ETE+T requirements.
6.How does Aetrix verify that MAX338ETE+T is sourced from the original manufacturer or authorized distributors?
All MAX338ETE+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 MAX338ETE+T meets industry standards.
7.What is the process for return or replacement of MAX338ETE+T?
All MAX338ETE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX338ETE+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 MAX338ETE+T part is unused and in its original packaging.
Return procedure for MAX338ETE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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