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Texas Instruments AM26C31MFKB
- Part No.:
- AM26C31MFKB
- Manufacturer:
- Texas Instruments
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 20-CLCC
- Datasheet:
-
AM26C31MFKB.pdf
- Description:
- IC TRANSCEIVER 4/0 20LCCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,868
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Product details
Overview
AM26C31MFKB from Texas Instruments is a quadruple differential line driver IC compliant with TIA/EIA-422-B and ITU V.11 standards, operating from a single 5V supply with 7ns typical propagation delay, 0.5ns typical pulse skew, and 100μA typical quiescent current. It delivers high-current complementary outputs for driving twisted-pair or parallel-wire transmission lines in military-grade communication interfaces.
For engineers reviewing the AM26C31MFKB datasheet, AM26C31MFKB pinout, AM26C31MFKB application, or AM26C31MFKB equivalent, this page provides verified functional mode behavior, LCCC-20 package terminal mapping, military temperature range (–55°C to +125°C) operation, and direct substitution guidance for RS-422 line driver selection in safety-critical embedded systems.
Technical Context
The AM26C31MFKB implements four independent BiCMOS differential drivers with complementary Y/Z outputs per channel and dual enable inputs (G active-high, G active-low) supporting flexible logic-level interfacing. Its architecture ensures high output impedance during power-off and maintains signal integrity via low pulse distortion and matched propagation delays across all channels.
It operates exclusively from a 4.5V–5.5V supply, meets MIL-PRF-38535 requirements for military applications, and delivers 3.1V typical differential output voltage into 100Ω loads while sustaining ±150mA short-circuit output current - enabling robust noise-immune data transmission over long cables in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5V to 5.5V - supports stable operation across military-grade voltage tolerances without external regulation. |
| Propagation Delay | 7ns typical (tPLH/tPHL) - enables >100 Mbps data rates on balanced lines with minimal timing uncertainty. |
| Pulse Skew | 0.5ns typical - ensures tight inter-channel timing alignment critical for multi-signal synchronization. |
| Differential Output Voltage | 3.1V typical into 100Ω - provides sufficient noise margin (>2V) for reliable reception in EMI-prone military avionics. |
| Quiescent Current | 100μA typical - reduces standby power in always-on defense subsystems without sacrificing drive capability. |
| Operating Temperature | –55°C to +125°C - qualified for full military temperature range per MIL-PRF-38535, enabling deployment in engine bays or radar housings. |
| Output Short-Circuit Current | –170mA - sustains fault conditions without latch-up, supporting ruggedized field transmitter designs. |
Pinout & Package
LCCC (FK) 20-pin ceramic leadless chip carrier package, 8.89mm × 8.89mm body size, hermetically sealed for military reliability and thermal stability under extreme environmental stress.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A, 2A, 3A, 4A | Input | Four independent non-inverting input signals for differential driver channels 1–4. |
| 1Y, 2Y, 3Y, 4Y | Output | Non-inverted differential outputs; drive positive side of twisted-pair or parallel-wire lines. |
| 1Z, 2Z, 3Z, 4Z | Output | Inverted differential outputs; drive negative side to establish true differential signaling per channel. |
| G, G | Enable Control | Active-high (G) and active-low (G) enables allow flexible microcontroller or FPGA interface logic matching. |
| VCC | Power | Single 5V supply pin shared across all four drivers and internal BiCMOS circuitry. |
| GND | Ground | Common reference for all inputs, outputs, and internal bias networks; requires low-impedance PCB plane. |
| NC (Pins 1, 6, 11, 16) | No Connection | Unbonded terminals; must remain unconnected to avoid parasitic coupling or mechanical stress. |
Key Features
| Feature | Design Value |
|---|---|
| TIA/EIA-422-B & ITU V.11 Compliance | Guarantees interoperability with standard RS-422 receivers and legacy telecom infrastructure in secure comms systems. |
| BiCMOS Process Technology | Combines bipolar speed (7ns delay) with CMOS low power (100μA ICC), eliminating need for separate high-speed/low-power ICs. |
| High-Impedance Power-Off State | Prevents bus contention and back-driving when VCC is removed - essential for hot-swap-capable military subsystems. |
| MIL-PRF-38535 Qualification | All parameters tested per military screening flow, including burn-in, temperature cycling, and hermeticity verification. |
| Complementary Output Architecture | Enables true differential signaling with 3.1V VOD into 100Ω, rejecting common-mode noise up to ±7V at the input. |
Applications
| Radar Signal Distribution | Military Field Transmitter Interface |
|---|---|
|
Use Scenario: Transmitting synchronized timing and control signals between radar processor and phased-array antenna modules over 30m shielded twisted-pair cabling in airborne platforms. IC Role / Device Role / Timing Role: Quadruple differential line driver providing isolated, noise-immune channelized command distribution with sub-nanosecond skew control. Use Value: Enables deterministic latency across four independent RF beam-steering channels, maintaining phase coherence required for synthetic aperture imaging. |
Use Scenario: Interfacing pressure and temperature sensors in armored vehicle engine monitoring systems exposed to vibration, EMI, and wide thermal swings. IC Role / Device Role / Timing Role: Robust RS-422 driver converting analog sensor controller outputs into differential signals immune to ground loop interference. Use Value: Sustains error-free communication at 10 Mbps over 50m cable runs despite 120dB conducted EMI from diesel ignition systems. |
| Avionics Imaging Data Link | Secure Modbus RTU Network Node |
|
Use Scenario: Transmitting uncompressed infrared image frame data from EO/IR turret to mission computer in UAVs using point-to-point differential links. IC Role / Device Role / Timing Role: High-speed line driver delivering pixel clock, sync, and data streams with matched propagation delay across parallel channels. Use Value: Eliminates inter-channel skew-induced image tearing by maintaining <0.5ns tsk(p), preserving spatial fidelity in real-time targeting displays. |
Use Scenario: Deploying hardened Modbus RTU nodes in nuclear facility instrumentation loops where radiation tolerance and long-term reliability are mandatory. IC Role / Device Role / Timing Role: Differential driver for Modbus master port, ensuring signal integrity across 1200m daisy-chained sensor networks. Use Value: Supports 115.2 kbps Modbus polling with guaranteed 2V noise margin, meeting IEC 61000-4-3 radiated immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar differential line driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM26LS31MD | Higher ICC (1.5mA typical), slower tPLH/tPHL (15ns), TTL-compatible inputs only. | Limited to legacy military systems requiring backward compatibility with LS-logic voltage thresholds. | Select only when replacing aging AM26LS31-based boards without redesigning level-shifting circuitry. |
| SN65LVDS31PW | LVDS output (350mV swing), 3.3V-only supply, no VCC=5V support, lower power (25mW/channel). | Suitable for modern low-voltage digital systems but incompatible with 5V RS-422 receivers and long-cable drive. | Choose for new 3.3V FPGA-based designs where power efficiency and density outweigh legacy interface needs. |
Compared with AM26LS31MD, AM26C31MFKB cuts quiescent power by 93% and improves speed by 2.1×; versus SN65LVDS31PW, it retains 5V RS-422 compatibility and 3.1V differential swing for legacy receiver interoperability and longer cable reach.
Availability
AM26C31MFKB is available at Aetrix Electronics and suitable for radar signal distribution, military field transmitter interface, avionics imaging data link, and secure Modbus RTU network node applications requiring stable component supply across extended product lifecycles.
Supply support for AM26C31MFKB 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
Texas Instruments is a global semiconductor company specializing in analog and embedded processing technologies, with leadership in high-reliability interface ICs for aerospace, defense, and industrial markets.
The AM26C31 product line delivers radiation-tolerant, temperature-hardened differential drivers for mission-critical serial communication in military and space applications where signal integrity and long-term reliability are non-negotiable.
FAQ
What is the operating temperature range certified for AM26C31MFKB?
The AM26C31MFKB is characterized for operation from –55°C to +125°C and qualified per MIL-PRF-38535 for full military temperature range use. This includes thermal cycling, burn-in, and parameter testing across the entire span, making it suitable for engine-mounted radar controllers and avionics black boxes.
Does AM26C31MFKB support both active-high and active-low enable inputs simultaneously?
Yes, AM26C31MFKB provides two dedicated enable inputs: G (active-high) and G (active-low). Either can be used independently to control all four drivers; they are not required to be driven together. This allows seamless integration with both positive- and negative-logic host controllers without external inverters.
What is the maximum differential output voltage swing of AM26C31MFKB into a 100Ω load?
The AM26C31MFKB delivers 3.1V typical differential output voltage (VOD) into a 100Ω load, with a minimum guaranteed value of 2V across the full military temperature range. This exceeds TIA/EIA-422-B's 2V minimum requirement and ensures robust noise immunity in high-EMI environments.
How does AM26C31MFKB behave when VCC is disconnected during system operation?
When VCC is removed, AM26C31MFKB enters a high-impedance state on all outputs (Y/Z pins), drawing less than ±100μA off-state current. This prevents bus contention and back-driving of connected receivers - a critical feature for hot-swap-capable military subsystems and fail-safe field transmitter interfaces.
Is AM26C31MFKB pin-compatible with standard SOIC or TSSOP packages of the same family?
No, AM26C31MFKB uses an LCCC (FK) 20-pin ceramic package, which is physically and electrically distinct from 16-pin SOIC (D), TSSOP (PW), or PDIP (N) variants. Pin count, layout, thermal characteristics, and hermetic sealing differ fundamentally - board redesign is required for migration from surface-mount plastic packages to AM26C31MFKB.
AM26C31MFKB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-CLCC
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- Driver
- Protocol:
- RS422
- Number of Drivers/Receivers:
- 4/0
- Duplex:
- -
- Receiver Hysteresis:
- -
- Data Rate:
- 10Mbps
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-LCCC (8.89x8.89)
AM26C31MFKB FAQ
1.How can I place an order for AM26C31MFKB through Aetrix?
Please submit a Request for Quotation (RFQ) for AM26C31MFKB 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 AM26C31MFKB reliable?
The price and inventory of AM26C31MFKB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AM26C31MFKB is usually 5 days.
3.What payment methods are accepted for AM26C31MFKB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AM26C31MFKB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AM26C31MFKB?
AM26C31MFKB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AM26C31MFKB 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 AM26C31MFKB?
For technical support, including AM26C31MFKB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AM26C31MFKB requirements.
6.How does Aetrix verify that AM26C31MFKB is sourced from the original manufacturer or authorized distributors?
All AM26C31MFKB 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 AM26C31MFKB meets industry standards.
7.What is the process for return or replacement of AM26C31MFKB?
All AM26C31MFKB units undergo pre-shipment inspection (PSI). If there is an issue with AM26C31MFKB, 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 AM26C31MFKB part is unused and in its original packaging.
Return procedure for AM26C31MFKB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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