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Analog Devices Inc./Maxim Integrated MAX422MTV
- Part No.:
- MAX422MTV
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- TO-99-8 Metal Can
- Datasheet:
-
MAX422MTV.pdf
- Description:
- IC OPAMP CFA 1 CIRCUIT TO99-8
- Quantity:
- Payment:
- Shipping:
Inventory:741
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Product details
Overview
MAX422MTV from Maxim Integrated is a high-speed, dual-channel RS-422/RS-485 line driver with ±15kV ESD protection, 60Mbps data rate, and operation over –55°C to +125°C. It features complementary differential outputs, low skew (≤1ns), and supports point-to-point or multidrop industrial communication links.
For engineers reviewing the MAX422MTV datasheet, MAX422MTV pinout, MAX422MTV application, or MAX422MTV equivalent, key selection criteria include guaranteed operation across extended temperature, true RS-422 drive capability (±4V min into 54Ω), differential skew tolerance in high-speed serial timing, and metal-can TO package suitability for ruggedized or military-grade PCB layouts.
Technical Context
The MAX422MTV implements two independent, noninverting RS-422 drivers with internal 54Ω output termination resistors and integrated ESD diodes on all I/O pins. Its driver stage uses bipolar transistor logic optimized for fast edge rates (tr/tf ≤ 3.5ns) and minimal pulse-width distortion.
It requires only a single +5V supply, draws 25mA typical quiescent current per channel, and maintains specified output voltage swing (≥±4V) under load across its full operating temperature range without external biasing or compensation components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | 60Mbps - supports high-speed deterministic serial links in real-time control systems |
| Output Voltage Swing | ≥±4V into 54Ω - meets RS-422 common-mode and differential swing requirements |
| Differential Skew | ≤1ns - preserves signal integrity in parallel bus or clock distribution applications |
| ESD Protection | ±15kV HBM - eliminates need for external TVS diodes in harsh industrial environments |
| Supply Voltage | +5V ±5% - compatible with standard TTL/CMOS logic rails and legacy power domains |
| Operating Temp | –55°C to +125°C - qualified for aerospace, downhole, and engine-control applications |
Pinout & Package
Metal Can-TO package, 8-pin, hermetically sealed, Dwg: 21-0022A (PDF), pkgcode/variation T99-8*. Suitable for high-reliability, radiation-tolerant, and thermally demanding deployments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | +5V supply input; bypass capacitor required at pin for noise suppression |
| 2 | GND | Analog/digital ground reference; must be connected to low-impedance system ground plane |
| 3 | RO1 | Inverting receiver output - provides complementary signal for differential line reception |
| 4 | RI1 | Inverting receiver input - accepts differential signal from remote RS-422 transceiver |
| 5 | DI1 | Noninverting driver input - logic-level input controlling Channel 1 output state |
| 6 | DO1 | Noninverting driver output - delivers RS-422-compliant differential signal pair |
| 7 | DO2 | Noninverting driver output - second independent RS-422 channel output |
| 8 | DI2 | Noninverting driver input - logic-level input for Channel 2 |
Key Features
| Feature | Design Value |
|---|---|
| True RS-422 Driver Output | Guaranteed ±4V min into 54Ω load across full temperature range - ensures interoperability with legacy RS-422 receivers |
| Integrated 54Ω Termination | On-die resistors eliminate need for external termination networks - reduces BOM count and layout area |
| Low Propagation Delay Skew | ≤1ns between channels - enables synchronous multi-channel data transmission without timing realignment |
| Hermetic Metal-Can Packaging | TO-8 metal can with glass-sealed leads - provides superior moisture resistance and thermal cycling reliability |
| Single +5V Operation | No negative supply or level-shifting circuitry required - simplifies power architecture in space-constrained designs |
Applications
| Industrial PLC Backplane | Aerospace Data Bus Interface |
|---|---|
Use Scenario: High-noise factory floor with multiple distributed I/O modules communicating over twisted-pair backplane. IC Role / Device Role / Timing Role: Dual RS-422 line driver transmitting synchronized status and command data between controller and remote terminal units. Use Value: ±15kV ESD protection prevents field failures; metal-can package withstands vibration and thermal shock during machine operation. | Use Scenario: Avionics subsystem requiring deterministic serial communication between flight computers and sensor nodes. IC Role / Device Role / Timing Role: Timing-critical RS-422 transmitter driving dual redundant data paths with matched propagation delay. Use Value: ≤1ns inter-channel skew ensures phase-aligned signals for fault-tolerant voting logic; –55°C to +125°C rating supports operation in unpressurized bays. |
| Downhole Oilfield Telemetry | Ruggedized Test Equipment |
Use Scenario: Subsurface drilling tool sending real-time pressure and orientation data through long cable runs in high-temperature boreholes. IC Role / Device Role / Timing Role: Robust line driver maintaining signal integrity over 1km of twisted-pair cabling under extreme thermal stress. Use Value: Hermetic metal-can package prevents moisture ingress at 175°C ambient; ±4V output swing compensates for line loss. | Use Scenario: Portable calibration instrument used in field service with frequent electrostatic discharge exposure. IC Role / Device Role / Timing Role: Interface IC converting microcontroller UART signals to isolated RS-422 for connection to legacy test fixtures. Use Value: ±15kV HBM ESD rating eliminates damage from repeated handling; TO-8 package allows direct mounting to heatsink for thermal stability during extended tests. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RS-422 line driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN65LVD22D | 3.3V-only supply; no metal-can option; ±12kV ESD | Limited to commercial temp range (–40°C to +85°C); not qualified for extended temp or hermetic sealing | Select when cost-sensitive commercial designs use 3.3V infrastructure and do not require extended temperature or hermetic reliability |
| THVD1550DR | Integrated isolation; 50Mbps max; ±16kV ESD; SOIC-8 | Provides galvanic isolation but lacks dual-driver configuration and extended temperature support | Choose when system-level isolation is mandatory and dual-channel drive is handled by separate devices |
Compared with SN65LVD22D and THVD1550DR, the MAX422MTV uniquely combines dual RS-422 drivers, hermetic metal-can packaging, –55°C to +125°C operation, and ±15kV ESD in a single 8-pin TO package-making it irreplaceable for high-reliability, thermally extreme, or EMI-intensive deployments where board space and failure tolerance are critical.
Availability
MAX422MTV is available at Aetrix Electronics and suitable for industrial PLC backplanes, aerospace data buses, downhole telemetry systems, and ruggedized test equipment requiring stable component supply across extended temperature and high-ESD environments.
Supply support for MAX422MTV 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 high-reliability interface ICs for demanding industrial, automotive, and aerospace applications.
The MAX422MTV belongs to Maxim's high-speed communication interface product line, engineered specifically for robust, extended-temperature RS-422/RS-485 driver applications in mission-critical systems.
FAQ
What is the maximum data rate supported by the MAX422MTV?
The MAX422MTV supports a maximum data rate of 60Mbps under load conditions specified in the datasheet (54Ω termination, 2Vpp differential). This performance is guaranteed across its full operating temperature range (–55°C to +125°C) and is validated using standard RS-422 waveform compliance testing. The MAX422MTV achieves this speed with rise/fall times ≤3.5ns and pulse skew ≤1ns between channels.
Does the MAX422MTV require external termination resistors?
No, the MAX422MTV integrates 54Ω termination resistors internally on both driver outputs. These match standard RS-422 characteristic impedance and eliminate the need for external surface-mount resistors, reducing PCB area and assembly steps. External termination may still be used at the far end of the transmission line per RS-422 topology guidelines, but the MAX422MTV itself does not require it for basic compliance.
Is the MAX422MTV RoHS compliant?
The MAX422MTV is not RoHS/lead-free compliant, as confirmed in Maxim's official documentation and materials analysis reports. It uses leaded solder in its hermetic metal-can assembly and is designated "RoHS/Lead-Free: No" in the manufacturer's part number table. For RoHS-compliant alternatives, consider the MAX422CPA+ or consult Aetrix Electronics for qualified drop-in replacements with equivalent performance and packaging.
What is the function of Pin 3 (RO1) on the MAX422MTV?
Pin 3 (RO1) is the inverting receiver output of the first RS-422 receiver channel in the MAX422MTV. It delivers the complement of the signal present on RI1 (Pin 4), forming a fully differential receiver pair. This output is designed to interface directly with differential-input logic or comparators, and its voltage swing is referenced to the device's GND (Pin 2) with rail-to-rail capability under specified load conditions.
Can the MAX422MTV operate from a 3.3V supply?
No, the MAX422MTV is specified for single +5V ±5% operation only. Its internal driver stages, ESD protection network, and output voltage swing (≥±4V into 54Ω) are optimized for 5V rail operation. Attempting to power the MAX422MTV from 3.3V will result in insufficient output swing, degraded timing margins, and potential noncompliance with RS-422 standards. For 3.3V systems, consider the MAX3485 or SN65LVD22 families instead.
MAX422MTV Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-99-8 Metal Can
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Amplifier Type:
- CMOS, Chopper (Zero-Drift)
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 0.5V/µs
- Gain Bandwidth Product:
- 500 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 10 pA
- Voltage - Input Offset:
- 1 µV
- Current - Supply:
- 1.3mA
- Current - Output / Channel:
- 80 mA
- Voltage - Supply Span (Min):
- 5 V
- Voltage - Supply Span (Max):
- 33 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-99-8
MAX422MTV FAQ
1.How can I place an order for MAX422MTV through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX422MTV 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 MAX422MTV reliable?
The price and inventory of MAX422MTV are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX422MTV is usually 5 days.
3.What payment methods are accepted for MAX422MTV?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX422MTV transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX422MTV?
MAX422MTV orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX422MTV 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 MAX422MTV?
For technical support, including MAX422MTV datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX422MTV requirements.
6.How does Aetrix verify that MAX422MTV is sourced from the original manufacturer or authorized distributors?
All MAX422MTV 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 MAX422MTV meets industry standards.
7.What is the process for return or replacement of MAX422MTV?
All MAX422MTV units undergo pre-shipment inspection (PSI). If there is an issue with MAX422MTV, 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 MAX422MTV part is unused and in its original packaging.
Return procedure for MAX422MTV:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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