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Analog Devices Inc./Maxim Integrated MAX14761ETB+T
- Part No.:
- MAX14761ETB+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
MAX14761ETB+T.pdf
- Description:
- IC SW SPST-NO/NCX2 2OHM 10TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,605
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Product details
Overview
MAX14761ETB+T from Maxim Integrated is a dual single-pole/single-throw (SPST) analog switch enabling bipolar signal routing beyond supply rails. It operates from a single +3.0V to +5.5V supply, supports ±25V analog signals, features 2Ω max on-resistance, 100MHz bandwidth, and −40°C to +85°C operation-ideal for RS-485/CAN termination switching in industrial communication interfaces.
For engineers reviewing the MAX14761ETB+T datasheet, MAX14761ETB+T pinout, MAX14761ETB+T application, or MAX14761ETB+T equivalent, key selection criteria include rail-to-rail signal handling capability, dual independent SPST topology, thermal shutdown protection, low 100nA max on-leakage, and compatibility with fail-safe biasing networks in RS-485 transceiver designs.
Technical Context
The MAX14761ETB+T integrates three charge pumps (5V regulated, +35V, and −27V) to bias internal switches, enabling operation with analog signals extending 25V above and below GND while powered from a single low-voltage supply. Its dual SPST architecture provides fully independent A1/B1 and A2/B2 channels, each with separate enable inputs (EN1/EN2), supporting asynchronous control of two discrete signal paths.
Signal integrity is maintained via 2.4mΩ typical RON flatness over −25V to +25V, <−77dB off-isolation at 100kHz, and <−83dB crosstalk-critical for high-fidelity analog routing and noise-sensitive instrumentation. Thermal shutdown triggers at +154°C with 24°C hysteresis, ensuring robust operation under sustained load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +3.0V to +5.5V - Enables direct interface with standard logic and microcontroller I/O without level-shifting. |
| Analog Signal Range | −25V to +25V - Supports full RS-485 common-mode range (−7V to +12V) and CAN bus voltages with margin. |
| Max On-Resistance | 2Ω - Minimizes voltage drop and power loss in 250mA continuous switching applications. |
| Bandwidth | 100MHz - Preserves signal integrity for fast digital edge transitions and audio-frequency analog signals. |
| On-Leakage Current | ±100nA max - Ensures minimal DC error in precision measurement front-ends and sensor interfaces. |
| Enable Turn-On Time | 152µs to 300µs - Enables deterministic timing control in automated test equipment (ATE) sequencing. |
| Thermal Shutdown Threshold | +154°C - Protects against latch-up and permanent damage during overcurrent or high-temperature operation. |
Pinout & Package
MAX14761ETB+T is housed in a 10-pin (3mm × 3mm) TDFN-EP package with exposed pad connected to VN. The compact footprint supports high-density PCB layouts in space-constrained industrial and instrumentation modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Positive supply input | Bypassed with 1µF ceramic capacitor; powers internal logic and charge pumps. |
| GND | Ground reference | Common return path for all analog and digital circuitry; connects to exposed pad via VN. |
| VN | Negative voltage output | Provides −27V bias for switch control; requires 0.1µF/50V bypass to GND. |
| VP | Positive voltage output | Provides +35V bias for switch control; requires 0.1µF/50V bypass to GND. |
| A1, B1 | Channel 1 analog terminals | Independent SPST path: A1 = input/output, B1 = common; bidirectional current flow up to ±250mA. |
| A2, B2 | Channel 2 analog terminals | Independent SPST path: A2 = input/output, B2 = common; fully isolated from Channel 1. |
| EN1 | Channel 1 enable input | Active-high logic control: high = closed (A1↔B1), low = open; TTL/CMOS compatible. |
| EN2 | Channel 2 enable input | Active-high logic control: high = closed (A2↔B2), low = open; independent timing from EN1. |
| EP | Exposed thermal pad | Must be soldered to VN plane for thermal dissipation; improves θJA to 41°C/W. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail signal handling | Switches ±25V analog signals with VCC as low as +3.0V-eliminates need for dual-supply biasing in industrial I/O modules. |
| Dual independent SPST channels | EN1 and EN2 allow asynchronous control of two signal paths-enables flexible fail-safe resistor switching in RS-485 networks. |
| Integrated high-voltage charge pumps | On-chip +35V/−27V generation removes external bias supplies-reduces BOM count and layout complexity. |
| Low RON flatness (5.1mΩ typ) | Minimizes harmonic distortion and gain error across full signal range-critical for precision instrumentation and audio routing. |
| ESD protection (2kV HBM) | Withstands handling and system-level ESD events without external protection-enhances reliability in field-deployed equipment. |
Applications
| RS-485 Termination Switching | CAN Bus Termination Switching |
|---|---|
Use Scenario: Dynamically enabling/disabling 120Ω differential termination resistors at RS-485 bus ends based on network topology or data rate requirements. IC Role / Device Role / Timing Role: Dual SPST switch controlling two termination legs independently; EN1/EN2 synchronized to transceiver control logic. Use Value: Eliminates manual jumper configuration and enables auto-adaptive termination-improving signal integrity across variable cable lengths and node counts. | Use Scenario: Selectively applying 120Ω termination across CANH/CANL lines in multi-node automotive or industrial networks during initialization or fault recovery. IC Role / Device Role / Timing Role: Bidirectional analog switch routing termination resistors into CAN differential pair; withstands ±25V transients per ISO 11898-2. Use Value: Reduces electromagnetic emissions and reflection-induced bit errors-ensuring reliable CAN FD communication up to 5Mbps. |
| Opto-Relay Replacement | Industrial Measurement Front-End |
Use Scenario: Replacing electromechanical relays or optocoupler-based switches in programmable logic controller (PLC) I/O modules requiring >1M cycle lifetime and sub-millisecond response. IC Role / Device Role / Timing Role: Solid-state SPST switch providing galvanically isolated signal path control via logic-level EN inputs. Use Value: Achieves 100x longer service life and 1000x faster switching than mechanical relays-reducing maintenance and enabling real-time reconfiguration. | Use Scenario: Multiplexing multiple sensor inputs (thermocouples, strain gauges, RTDs) into a shared ADC channel while preserving signal fidelity and offset stability. IC Role / Device Role / Timing Role: Low-leakage, low-RON analog switch isolating high-impedance sensors from multiplexer capacitance and crosstalk. Use Value: Maintains <0.0012% THD+N and ±100nA leakage-enabling 24-bit measurement accuracy without calibration drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX14759ETA+ | Single SPST, 1Ω max RON, 8-pin TDFN, no EN2 | Suitable only for single-channel termination or switching; lacks dual-control flexibility | Select when board space is constrained and only one switch path is needed. |
| MAX14763ETA+ | Single SPDT, 2Ω max RON, 8-pin TDFN, SEL-controlled COM/A1/A2 routing | Provides signal source selection (A1 or A2 → COM) instead of independent on/off control | Select for audio amplifier source switching or single-pole multiplexing where SPDT topology matches system architecture. |
Compared with MAX14759ETA+ and MAX14763ETA+, the MAX14761ETB+T uniquely delivers two electrically isolated SPST channels with independent enables-making it the only option among the three for simultaneous, asynchronous control of two discrete signal paths in RS-485 fail-safe biasing or dual-sensor conditioning circuits.
Availability
MAX14761ETB+T is available at Aetrix Electronics and suitable for industrial measurement systems, RS-485 termination switching, and CAN bus interface design requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX14761ETB+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, designs precision analog, mixed-signal, and power management ICs for industrial, medical, and communications applications.
The MAX14759/MAX14761/MAX14763 family targets high-reliability signal routing in harsh environments-specifically engineered to replace mechanical relays and simplify rail-to-rail analog switching in industrial I/O and bus interface systems.
FAQ
What is the maximum continuous current rating for each channel of the MAX14761ETB+T?
The MAX14761ETB+T supports ±250mA continuous current per channel (A1/B1 and A2/B2). This rating applies across the full −25V to +25V analog signal range and is validated at TA = −40°C to +85°C. Exceeding this limit risks thermal shutdown activation or long-term reliability degradation. Derating is recommended for sustained operation above +70°C ambient.
Does the MAX14761ETB+T require external capacitors for proper operation?
Yes, the MAX14761ETB+T requires two external 0.1µF, 50V ceramic capacitors: one between VP and GND, and another between VN and GND. These stabilize the internal high-voltage charge pumps. Additionally, a 1µF ceramic capacitor is required between VCC and GND. All capacitors must be placed as close as possible to their respective pins to ensure stable bias generation and prevent oscillation.
Can the MAX14761ETB+T operate with analog inputs present before power is applied?
Yes, the MAX14761ETB+T tolerates ±25V on A1, B1, A2, and B2 pins with VCC = 0V. Input leakage remains typically <1µA, though technology spread may allow up to ~1mA transiently. However, dv/dt on inputs must be limited to ≤3V/µs when VP/VN capacitors are charging-achieved by limiting source impedance or adding series resistance-to avoid damaging internal diodes.
What is the function of the exposed pad (EP) on the MAX14761ETB+T package?
The exposed pad (EP) on the MAX14761ETB+T must be soldered directly to the VN net on the PCB. It serves as the primary thermal conduction path, reducing junction-to-ambient thermal resistance to 41°C/W. Connecting EP to any other net-including GND or VCC-violates the internal bias architecture and may cause malfunction or permanent damage.
How does the MAX14761ETB+T achieve rail-to-rail signal switching with a single low-voltage supply?
The MAX14761ETB+T achieves rail-to-rail switching using three integrated charge pumps: a 5V regulated pump, a +35V pump, and a −27V pump. These generate internal bias voltages that extend the effective gate drive range of the MOSFET switches, enabling conduction of signals from −25V to +25V while powered solely from +3.0V to +5.5V. No external high-voltage supplies are needed.
MAX14761ETB+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Switch Circuit:
- SPST - NO/NC
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 2
- On-State Resistance (Max):
- 2Ohm
- Channel-to-Channel Matching (ΔRon):
- 5.1mOhm
- Voltage - Supply, Single (V+):
- 3V ~ 5.5V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- 300µs, 1ns
- -3db Bandwidth:
- 100MHz
- Charge Injection:
- 1370pC
- Channel Capacitance (CS(off), CD(off)):
- -
- Current - Leakage (IS(off)) (Max):
- 250nA
- Crosstalk:
- -83dB @ 100kHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-TDFN (3x3)
MAX14761ETB+T FAQ
1.How can I place an order for MAX14761ETB+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX14761ETB+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 MAX14761ETB+T reliable?
The price and inventory of MAX14761ETB+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX14761ETB+T is usually 5 days.
3.What payment methods are accepted for MAX14761ETB+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX14761ETB+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX14761ETB+T?
MAX14761ETB+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX14761ETB+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 MAX14761ETB+T?
For technical support, including MAX14761ETB+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX14761ETB+T requirements.
6.How does Aetrix verify that MAX14761ETB+T is sourced from the original manufacturer or authorized distributors?
All MAX14761ETB+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 MAX14761ETB+T meets industry standards.
7.What is the process for return or replacement of MAX14761ETB+T?
All MAX14761ETB+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX14761ETB+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 MAX14761ETB+T part is unused and in its original packaging.
Return procedure for MAX14761ETB+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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