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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:2,430
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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 output under 3-bit binary address control (A0–A2), with TTL/CMOS-compatible enable (EN) and address inputs. It features 400Ω max on-resistance, <20pA NO-off leakage at +25°C, 1.5pC typical charge injection, and operates from ±4.5V to ±20V dual supplies or +4.5V to +30V single supply. It is used in precision data-acquisition systems where low leakage and rail-to-rail signal handling are critical.
For engineers reviewing the MAX338ETE-T datasheet, MAX338ETE-T pinout, MAX338ETE-T application, or MAX338ETE-T equivalent, key selection criteria include guaranteed low off-leakage (<20pA), tight on-resistance matching (<10Ω), ESD protection >2000V, and compatibility with legacy DG508A layouts in TQFN-EP packaging.
Technical Context
The MAX338ETE-T implements a monolithic silicon-gate CMOS switch matrix with integrated decode logic for 3-bit address selection and global enable gating. Its architecture supports bidirectional current flow, rail-to-rail analog signal handling (±15V with ±15V supplies), and break-before-make switching with 10ns–140ns interval.
All digital inputs (A0, A1, A2, EN) maintain TTL compatibility across full temperature range (−40°C to +85°C) and supply ranges (±4.5V to ±18V), while internal clamping diodes protect NO/COM terminals against overvoltage up to (V− − 2V) and (V+ + 2V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance | 400Ω max at ±15V supplies - ensures minimal voltage drop and gain error in precision signal paths |
| NO-Off Leakage | <20pA at +25°C - preserves high-impedance sensor node integrity in data-acquisition front-ends |
| Charge Injection | 1.5pC typ - limits voltage glitch on sampled-hold capacitors, enabling sub-12-bit settling accuracy |
| Transition Time | <500ns - supports multiplexing rates up to ~2MHz in automated test equipment |
| Supply Range | ±4.5V to ±20V dual or +4.5V to +30V single - allows direct interfacing with industrial ±15V and automotive 12V/24V rails |
| ESD Protection | >2000V per Method 3015.7 - reduces need for external transient suppression in field-deployed systems |
| On-Resistance Match | <10Ω - minimizes channel-to-channel gain mismatch in multi-sensor scanning applications |
Pinout & Package
The MAX338ETE-T is housed in a 16-pin TQFN-EP package (5mm × 5mm) with exposed pad connected to V+. This thermally enhanced RoHS-compliant package supports high-density PCB layouts and improved power dissipation (1666.7mW at TA = +70°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 15, 14, 13 | A0, A1, A2 | 3-bit binary address inputs selecting one of eight NOx channels; TTL/CMOS compatible |
| 2 | EN | Active-high enable controlling all switches; disables all channels when low |
| 3 | V− | Negative supply rail input; must be ≥ −20V and ≤ −4.5V in dual-supply mode |
| 4–7, 9–12 | NO1–NO8 | Bidirectional analog inputs; support rail-to-rail signals between V− and V+ |
| 6 | COM | Common analog output terminal; bidirectional, same voltage range as NO pins |
| 11 | V+ | Positive supply rail input; must be ≤ +30V (single) or ≤ +20V (dual) |
| 12 | GND | Digital ground reference for logic inputs; separate from analog return paths |
| Exposed Pad | V+ | Thermal and electrical connection to V+; mandatory for thermal performance and EMI reduction |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail signal handling | Supports analog signals from V− to V+ without clipping - enables direct interface with ±15V op-amps and DACs |
| Plug-in upgrade for DG508A | PIN-compatible replacement with lower leakage, lower charge injection, and higher ESD rating - no PCB redesign required |
| TTL/CMOS logic compatibility | Input thresholds fixed at +0.8V (low) and +2.4V (high) across full temp/supply range - eliminates level-shifter needs |
| Low on-resistance matching | <10Ω max variation between channels - maintains consistent gain scaling across multiplexed sensor inputs |
| Guaranteed low charge injection | 1.5pC typical - reduces hold-step error in sample-and-hold circuits, improving effective resolution |
Applications
| Data-Acquisition Systems | Test Equipment |
|---|---|
Use Scenario: Scanning multiple thermocouple or strain-gauge sensors into a single ADC channel with minimal crosstalk and offset drift. IC Role / Device Role / Timing Role: Analog multiplexer routing high-impedance sensor outputs to a precision SAR ADC front-end. Use Value: Sub-20pA off-leakage prevents sensor bias current errors; 400Ω on-resistance avoids loading effects on millivolt-level signals. |
Use Scenario: Automated switching of calibration references, DUT signals, and measurement paths in benchtop multimeters and signal analyzers. IC Role / Device Role / Timing Role: High-reliability signal path selector enabling programmable test sequencing with <500ns transition time. Use Value: 1.5pC charge injection ensures stable DC offsets during rapid channel changes; ESD >2000V withstands lab handling stress. |
| Military Radios | Guidance and Control Systems |
Use Scenario: Routing RF front-end receive paths, antenna diversity signals, and IF monitoring taps in ruggedized SDR transceivers. IC Role / Device Role / Timing Role: Low-leakage analog switch managing signal routing in wide-temperature (-40°C to +85°C) RF subsystems. Use Value: Guaranteed leakage <1.25nA over full temp range preserves dynamic range; TQFN-EP package meets MIL-STD-883 thermal cycling requirements. |
Use Scenario: Multiplexing inertial measurement unit (IMU) outputs, GPS timing pulses, and actuator feedback in flight control computers. IC Role / Device Role / Timing Role: Precision analog switch enabling synchronized sampling of redundant sensor sets with matched on-resistance. Use Value: <10Ω on-resistance matching ensures identical gain across triple-redundant channels; ±20V supply tolerance accommodates avionics power rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DG508A | Higher NO-off leakage (100pA vs. <20pA), higher charge injection (5pC vs. 1.5pC), no ESD rating specified | Legacy industrial designs where leakage tolerance >50pA is acceptable; lacks modern ESD robustness | Select DG508A only if backward compatibility with obsolete designs is mandatory and leakage budget permits |
| MAX328 | Lower leakage (<5pA) and charge injection (0.5pC), but higher on-resistance (1kΩ max) and limited to ±15V supplies | Ultra-low-leakage medical instrumentation or high-resolution metrology where speed is secondary to precision | Choose MAX328 when sub-10pA leakage is required and 1kΩ on-resistance is acceptable in signal chain design |
Compared with DG508A and MAX328, the MAX338ETE-T delivers optimal balance: industry-standard pinout with modern leakage/ESD performance, while maintaining low on-resistance suitable for both precision and speed-critical applications.
Availability
The 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 and long product 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 fabless semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and computing markets.
The MAX338 series belongs to Maxim's precision analog switch portfolio, engineered for low-leakage, low-charge-injection multiplexing in demanding measurement and control applications where signal integrity is non-negotiable.
FAQ
What is the operating temperature range for the MAX338ETE-T?
The MAX338ETE-T is rated for operation from −40°C to +85°C. This extended industrial temperature range is confirmed in the Ordering Information table and Absolute Maximum Ratings section of the datasheet, and applies specifically to the "E" grade suffix in the MAX338ETE-T part number. The device maintains full parameter guarantees-including leakage, on-resistance, and switching times-across this entire range.
Does the MAX338ETE-T support single-supply operation?
Yes, the MAX338ETE-T supports single-supply operation from +4.5V to +30V. When using a single supply, V− must be connected to GND. The datasheet confirms rail-to-rail analog signal handling (0V to V+) under these conditions, and specifies on-resistance, leakage, and dynamic parameters for +12V and +15V single-supply configurations in the Electrical Characteristics tables.
Is the MAX338ETE-T pin-compatible with the DG508A?
Yes, the MAX338ETE-T is explicitly documented as a pin-compatible upgrade for the DG508A. The datasheet states "These improved muxes are pin-compatible upgrades for the industry-standard DG508A and DG509A," and the TQFN-EP pinout (16-pin, 5mm × 5mm) maps directly to the DG508A's 16-pin DIP/SO/QSOP footprint in functional pin assignment-A0/A1/A2/EN/COM/NO1–NO8/V+/V−/GND positions match.
What is the maximum allowable voltage difference between V+ and V− for the MAX338ETE-T?
The absolute maximum voltage difference between V+ and V− is 44V, as stated in the Absolute Maximum Ratings table. This limit holds regardless of individual rail values-for example, +24V on V+ and −20V on V− yields a 44V differential and remains within specification. Exceeding this may cause permanent damage, and the device is not rated for operation beyond it.
How is the exposed pad on the MAX338ETE-T package intended to be used?
The exposed pad on the MAX338ETE-T must be soldered and electrically connected to V+. This is explicitly required in the Pin Description section ("CONNECT EP TO V+") and Package Information table. Doing so ensures proper thermal dissipation (enabling 1666.7mW power handling at +70°C) and improves EMI immunity by providing a low-inductance return path for high-frequency currents.
MAX338ETE-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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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