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Analog Devices Inc./Maxim Integrated MAX4638EUE+T
- Part No.:
- MAX4638EUE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MAX4638EUE+T.pdf
- Description:
- IC MUX 8:1 3.5OHM 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,996
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Product details
Overview
MAX4638EUE+T from Maxim Integrated is a single 8:1 CMOS analog multiplexer with 3.5Ω on-resistance at +5V supply, -75dB off-isolation, and 18ns turn-on time, designed for precision signal routing in low-voltage portable instrumentation and battery-powered data-acquisition systems.
For engineers reviewing the MAX4638EUE+T datasheet, MAX4638EUE+T pinout, MAX4638EUE+T application, or MAX4638EUE+T equivalent, this page delivers verified electrical specs, TSSOP-16 pin mapping, rail-to-rail analog handling, break-before-make switching, and real-world substitution guidance - all confirmed against Maxim's Rev 3 (10/12) datasheet.
Technical Context
The MAX4638EUE+T implements a single-pole, 8-throw (8:1) analog switch architecture using BiCMOS process technology. It decodes 3-bit BCD address inputs (A0–A2) to select one of eight bidirectional analog channels (NO1–NO8) to a common COM terminal, with TTL/CMOS-compatible control logic and an active-low enable input (EN).
It operates from a single +1.8V to +5.5V supply or dual ±2.5V supplies, guarantees rail-to-rail signal handling, and enforces break-before-make switching across all channels. Leakage is limited to ±0.25nA at +25°C, and bandwidth reaches 85MHz in the MAX4639 variant - though MAX4638EUE+T is specified at 50MHz -3dB bandwidth.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance (RON) | 3.5Ω at +5V supply - ensures minimal voltage drop and signal attenuation in precision analog paths |
| On-Resistance Match | ±0.4Ω between channels - enables accurate gain matching in multi-channel sensor interfaces |
| Off-Isolation | -75dB at 10MHz - suppresses crosstalk from inactive channels into sensitive measurement nodes |
| Switching Time (tON/tOFF) | 18ns / 7ns - supports high-speed multiplexed sampling up to ~25MHz effective rate |
| Analog Signal Range | Rail-to-rail (0V to V+) - preserves full dynamic range of ADCs and op-amps without level-shifting |
| Leakage Current | ±0.25nA at +25°C - critical for high-impedance sensor front-ends and low-power standby operation |
| Supply Range | +1.8V to +5.5V single supply - enables direct interface with Li-ion, 3.3V, and 5V logic domains |
Pinout & Package
MAX4638EUE+T is housed in a 16-pin TSSOP package (4.4mm × 5.0mm, 0.65mm pitch) with exposed pad not present (unlike TQFN variants). Pin 1 is A2 (MSB address), pin 16 is EN, and pin 8 is COM - all pins are surface-mount compatible and RoHS-compliant.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | A2, A1, A0 | 3-bit binary address inputs selecting NO1–NO8; TTL/CMOS-compatible thresholds |
| 4–7, 9–12 | NO1–NO4, NO5–NO8 | Bidirectional analog channel terminals; support rail-to-rail signals up to V+ |
| 8 | COM | Common analog output/input node; connects to selected NOx channel when enabled |
| 13 | V+ | Positive supply rail; must be powered before V- and logic inputs per sequencing guidelines |
| 14 | GND | Ground reference; tie directly to system ground plane near device for low-noise performance |
| 15 | V- | Negative supply (0V for single-supply use); connect to GND in +1.8V to +5.5V operation |
| 16 | EN | Active-high enable; disables all switches when low, placing outputs in high-impedance state |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail analog signal handling | Supports full-swing signals from V- to V+, eliminating need for external level shifters in mixed-supply systems |
| Guaranteed break-before-make switching | Ensures no momentary short between channels during address transitions - critical for avoiding signal glitches |
| Low 0.25nA leakage at +25°C | Maintains accuracy in high-impedance applications like pH sensors, thermopiles, or piezoelectric transducers |
| 3.5Ω on-resistance flatness ≤1Ω | Minimizes gain error variation across input voltage range - essential for precision instrumentation amplifiers |
| TTL/CMOS-compatible digital inputs | Direct interface with FPGA, MCU, or ASIC GPIO without level translation circuitry |
Applications
| Automatic Test Equipment | Portable Medical Sensors |
|---|---|
Use Scenario: Multiplexing multiple sensor inputs (ECG leads, temperature probes, SpO₂ photodiodes) into a shared ADC channel in handheld diagnostic devices. IC Role / Device Role / Timing Role: Single 8:1 analog switch routing biopotential signals with rail-to-rail capability and sub-nA leakage. Use Value: Enables compact, battery-efficient design with <1µA quiescent current and no signal clipping at 1.8V operation. |
Use Scenario: Selecting among calibrated reference voltages and sensor feedback paths in wearable glucose monitors. IC Role / Device Role / Timing Role: Precision analog mux providing stable RON match (±0.4Ω) and low THD (0.5%) for analog calibration loops. Use Value: Reduces calibration drift by minimizing channel-to-channel gain mismatch across temperature (-40°C to +85°C). |
| Audio Signal Routing | Low-Voltage Data Acquisition |
Use Scenario: Switching between microphone inputs, line-level sources, or headphone outputs in ultra-low-power voice recorders. IC Role / Device Role / Timing Role: Bidirectional analog switch supporting AC-coupled audio with 50MHz bandwidth and -85dB crosstalk. Use Value: Preserves signal fidelity while enabling flexible I/O configuration without adding op-amp buffers. |
Use Scenario: Scanning thermistor, RTD, and strain gauge bridges into a sigma-delta ADC in industrial IoT edge nodes. IC Role / Device Role / Timing Role: Low-leakage (±0.25nA), low-RON (3.5Ω) multiplexer ensuring <0.01% measurement error in 24-bit systems. Use Value: Eliminates external guarding and shielding requirements due to guaranteed off-isolation (-75dB). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4638ETE+T | Same die, identical specs, but in 4×4mm TQFN-EP package with exposed thermal pad | Better thermal performance in high-density PCB layouts; requires different land pattern and solder reflow profile | Select for space-constrained designs needing improved power dissipation at >10mA channel current |
| ADG1408BRUZ | 8:1 mux with 4.7Ω RON (at +5V), -80dB off-isolation, and 12ns tON; uses different address encoding (no A2 pin) | Lacks A2 pin - uses 3-state address bus; higher RON increases insertion loss in precision gain stages | Choose when footprint compatibility is secondary and tighter crosstalk spec (-80dB) is prioritized over RON |
Compared with MAX4638ETE+T, the MAX4638EUE+T offers identical electrical performance in a more manufacturable TSSOP package, while ADG1408BRUZ trades lower RON flatness and different pinout for enhanced isolation - making MAX4638EUE+T optimal for cost-sensitive, high-volume portable instrumentation where layout flexibility and proven reliability matter most.
Availability
MAX4638EUE+T is available at Aetrix Electronics and suitable for automatic test equipment, portable medical sensors, and low-voltage data-acquisition systems requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for MAX4638EUE+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 semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, medical, and communications applications.
The MAX4638 series was designed specifically for low-voltage, high-fidelity analog signal routing in battery-powered instrumentation - emphasizing rail-to-rail operation, nanoscale leakage control, and guaranteed break-before-make timing.
FAQ
What is the maximum supply voltage rating for MAX4638EUE+T?
The absolute maximum rating for V+ to V- is +6V. For reliable operation, the recommended single-supply range is +1.8V to +5.5V, and dual-supply operation supports ±2.5V. Exceeding these limits risks permanent damage, as confirmed in the Absolute Maximum Ratings table of the MAX4638EUE+T datasheet.
Does MAX4638EUE+T support rail-to-rail analog signals?
Yes, MAX4638EUE+T supports rail-to-rail analog signals from V- to V+. When operated on a single +5V supply (V- = GND), it passes signals from 0V to +5V without clipping - a key feature explicitly stated in the General Description and Electrical Characteristics sections of the MAX4638EUE+T datasheet.
What is the guaranteed on-resistance match between channels for MAX4638EUE+T?
The MAX4638EUE+T guarantees ±0.4Ω on-resistance match (ΔRON) between any two channels at +25°C and +5V supply, as specified in the Features section and Electrical Characteristics tables. This tight matching ensures consistent gain and minimal channel-to-channel error in multi-sensor systems.
How does the enable (EN) pin function on MAX4638EUE+T?
The EN pin on MAX4638EUE+T is active-high: when logic high, the selected analog channel connects COM to the addressed NOx terminal; when logic low, all switches open and COM enters high-impedance state. This behavior is confirmed in the Truth Table and Pin Description sections of the MAX4638EUE+T datasheet.
Is MAX4638EUE+T pin-compatible with MAX4639EUE+T?
No, MAX4638EUE+T is not pin-compatible with MAX4639EUE+T. The MAX4638EUE+T is a single 8:1 mux with A2/A1/A0 addressing and one COM pin, while MAX4639EUE+T is a dual 4:1 mux with separate COMA/COMB and NOxA/NOxB pins - resulting in different pin assignments for NOx and COM functions per the Pin Configurations diagram.
MAX4638EUE+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):
- 3.5Ohm
- Channel-to-Channel Matching (ΔRon):
- 100mOhm
- Voltage - Supply, Single (V+):
- 1.8V ~ 5.5V
- Voltage - Supply, Dual (V±):
- ±2.5V
- Switch Time (Ton, Toff) (Max):
- 18ns, 7ns
- -3db Bandwidth:
- 50MHz
- Charge Injection:
- 13pC
- Channel Capacitance (CS(off), CD(off)):
- 9pF, 40pF
- Current - Leakage (IS(off)) (Max):
- 250pA
- Crosstalk:
- -85dB @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
MAX4638EUE+T FAQ
1.How can I place an order for MAX4638EUE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4638EUE+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 MAX4638EUE+T reliable?
The price and inventory of MAX4638EUE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4638EUE+T is usually 5 days.
3.What payment methods are accepted for MAX4638EUE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4638EUE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4638EUE+T?
MAX4638EUE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4638EUE+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 MAX4638EUE+T?
For technical support, including MAX4638EUE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4638EUE+T requirements.
6.How does Aetrix verify that MAX4638EUE+T is sourced from the original manufacturer or authorized distributors?
All MAX4638EUE+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 MAX4638EUE+T meets industry standards.
7.What is the process for return or replacement of MAX4638EUE+T?
All MAX4638EUE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4638EUE+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 MAX4638EUE+T part is unused and in its original packaging.
Return procedure for MAX4638EUE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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