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Texas Instruments AM26C32CD
- Part No.:
- AM26C32CD
- Manufacturer:
- Texas Instruments
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AM26C32CD.pdf
- Description:
- IC TRANSCEIVER 0/4 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,525
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Product details
Overview
AM26C32CD from Texas Instruments is a quadruple differential line receiver compliant with ANSI TIA/EIA-422-B, TIA/EIA-423-B, and ITU V.10/V.11 standards. It operates from a single 5-V supply, delivers 17 ns typical propagation delay, supports ±7-V common-mode input range with ±200-mV sensitivity, and features 3-state outputs for bus interfacing in industrial RS-422 communication systems.
For engineers reviewing the AM26C32CD datasheet, AM26C32CD pinout, AM26C32CD application, or AM26C32CD equivalent, this device is selected for robust long-line digital reception in factory automation, smart grid infrastructure, and high-reliability automotive subsystems where fail-safe operation and low-power BiCMOS performance are required.
Technical Context
The AM26C32CD implements four independent RS-422-compatible receivers with shared active-high (G) and active-low (G̅) enable control. Its BiCMOS process enables 10 mA typical quiescent current while maintaining AC performance matching legacy bipolar receivers.
Input hysteresis of 60 mV ensures noise immunity across the full ±7-V common-mode range, and fail-safe circuitry guarantees high output states during open-input or bus-idle conditions-critical for deterministic system behavior in unpowered or disconnected scenarios.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5-V logic rails and tolerant of typical power rail variation |
| Propagation Delay | 17 ns typical - enables reliable operation at data rates up to ~30 Mbps in point-to-point configurations |
| Common-Mode Range | ±7 V - supports long cable runs (up to 1000 m) with ground potential differences between nodes |
| Differential Sensitivity | ±200 mV - reliably detects valid signal transitions even under high noise or attenuation |
| Input Hysteresis | 60 mV typical - suppresses false triggering from EMI or slow-rising signals on unterminated lines |
| Quiescent Current | 10 mA typical - reduces thermal load and power supply demand compared to AM26LS32 (≈5× lower) |
| Output Type | 3-State TTL-compatible - allows direct connection to shared data buses without external isolation |
Pinout & Package
AM26C32CD is supplied in a 16-pin SOIC (D) package measuring 9.9 mm × 6.0 mm, with standard JEDEC MS-012AC footprint and 1.27 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A, 2A, 3A, 4A | Differential noninverting input | Accepts positive leg of RS-422 differential pair; referenced to corresponding B pin |
| 1B, 2B, 3B, 4B | Differential inverting input | Accepts negative leg of RS-422 differential pair; defines differential voltage VID = VA − VB |
| 1Y, 2Y, 3Y, 4Y | Logic-level output | TTL-compatible 3-state outputs; high/low driven when enabled, high-impedance when disabled |
| G | Active-high enable | Drives all four receivers active when logic high; outputs enter high-Z when low |
| G̅ | Active-low enable | Drives all four receivers active when logic low; outputs enter high-Z when high |
| VCC | Power supply | Single 5-V supply for both receiver front-end and output buffer stages |
| GND | Ground reference | Common return path for supply and signal references; requires low-impedance PCB plane |
Key Features
| Feature | Design Value |
|---|---|
| Fail-safe input circuitry | Guarantees high output state during open inputs or bus disconnection-eliminates undefined logic states in idle or fault conditions |
| Dual-enable logic (G/G̅) | Supports either active-high or active-low system control without external inverters-reduces BOM count and layout complexity |
| BiCMOS process technology | Combines bipolar speed and drive strength with CMOS low power-achieves 10 mA ICC while retaining 17 ns tPD and ±25 mA IOL/IOH |
| ±7-V common-mode tolerance | Enables interoperability across electrically noisy environments (e.g., motor drives, factory floors) with ground offsets up to 14 V peak-to-peak |
| RS-422/RS-485 receiver compatibility | Meets TIA/EIA-422-B and V.11 requirements-certified for use in industrial serial links requiring differential noise rejection |
Applications
| Factory Automation | Smart Grid Infrastructure |
|---|---|
Use Scenario: PLC-to-sensor communication over 300 m twisted-pair cabling in a metal-rich plant environment with variable ground potentials. IC Role / Device Role / Timing Role: Differential line receiver converting RS-422 bus signals into clean TTL logic levels for microcontroller input capture. Use Value: ±7-V common-mode range rejects ground-loop noise; 60 mV hysteresis prevents chatter on slow-rising encoder signals. | Use Scenario: Substation RTU receiving telemetry from remote metering units via shielded 1000 m cable runs exposed to lightning-induced transients. IC Role / Device Role / Timing Role: Robust physical-layer receiver ensuring deterministic high-state output during bus faults or open-circuit events. Use Value: Fail-safe design forces logic-high output on loss of signal-prevents spurious trip commands in protection logic. |
| AC Motor Drive Control | Automotive Body Control Module |
Use Scenario: Isolated feedback interface between inverter gate driver board and main controller, operating in high dv/dt switching noise environment. IC Role / Device Role / Timing Role: High-speed differential receiver recovering position/speed data from resolver-to-digital converters. Use Value: 17 ns tPD supports real-time closed-loop response; 3-state outputs allow multiplexing with other control signals on shared bus. | Use Scenario: Gateway module aggregating CAN and LIN signals, using AM26C32CD for legacy RS-422 diagnostic port interfacing. IC Role / Device Role / Timing Role: Level-shifting and noise-immune receiver for OEM service tool communication over extended vehicle harnesses. Use Value: Single 5-V supply simplifies power architecture; ±200-mV sensitivity ensures reliable detection despite connector corrosion or voltage drop. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar differential line receiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN65LBC179DR | Lower ICC (1.5 mA), wider operating temperature (–40°C to 125°C), but no dual-enable (G/G̅) pins | Preferred for ultra-low-power battery-backed systems; lacks flexible enable polarity for legacy control logic | Select when power budget is critical and enable polarity matches existing firmware; verify pinout rework for G/G̅ omission |
| AM26LS32ACN | Higher ICC (35 mA), same pinout and function, but bipolar-only process and no fail-safe design | Suitable for cost-sensitive replacements where fail-safe is not required and thermal headroom exists | Choose only if AM26C32CD's BiCMOS efficiency or fail-safe behavior is unnecessary; confirm bus idle behavior in system test |
Compared with SN65LBC179DR and AM26LS32ACN, AM26C32CD uniquely balances low power (10 mA), fail-safe reliability, and dual-enable flexibility in a drop-in SOIC-16 package-making it optimal for industrial upgrades where legacy compatibility and deterministic fault behavior are mandatory.
Availability
AM26C32CD is available at Aetrix Electronics and suitable for factory automation, smart grid infrastructure, and automotive body control modules requiring stable component supply across extended product lifecycles.
Supply support for AM26C32CD 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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and communications markets.
The AM26C32 family was designed as a low-power, fail-safe upgrade path for legacy RS-422 line receivers-targeting industrial control, motor drives, and automotive subsystems where reliability under electrical stress is non-negotiable.
FAQ
What is the operating temperature range for AM26C32CD?
The AM26C32CD is rated for 0°C to 70°C ambient operation. This commercial-grade specification aligns with its SOIC (D) packaging and intended use in controlled-environment industrial equipment and test instrumentation. For extended temperature applications, consider AM26C32IDR (–40°C to 125°C) in the same SOIC-16 package.
Does AM26C32CD support RS-485 half-duplex bus operation?
AM26C32CD is an RS-422 receiver only and does not include driver functionality or RS-485-specific features such as unit-load input impedance or true half-duplex bus arbitration. It can receive RS-485 signals in point-to-point or multi-drop receive-only configurations, but cannot transmit or manage bus contention-use with dedicated RS-485 transceivers like SN65HVD72 for full duplex.
How does the fail-safe feature of AM26C32CD behave during power-up?
During power-up, AM26C32CD's internal fail-safe circuitry ensures all outputs default to logic high until valid differential input signals are applied and supply stabilizes. This behavior is maintained regardless of G/G̅ enable state, preventing spurious low pulses that could trigger downstream logic errors before system initialization completes.
Can AM26C32CD be used with 3.3-V microcontrollers?
Yes-AM26C32CD's 3-state TTL outputs are compatible with 3.3-V logic inputs when VCC = 5 V, as VOH ≥ 3.8 V (min) meets 3.3-V VIH thresholds. However, the device itself requires a 5-V supply; do not operate VCC below 4.5 V. For native 3.3-V operation, consider SN65LBC179DR or THVD1550.
What is the maximum cable length supported by AM26C32CD in a noise-free environment?
In a noise-free lab environment with proper termination, AM26C32CD supports cable lengths up to 1000 m at data rates ≤ 100 kbps. At higher speeds (e.g., 1 Mbps), practical length drops to ~10 m due to signal integrity limits-not device limitation-so actual reach depends on cable quality, termination, and noise margin requirements.
AM26C32CD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Receiver
- Protocol:
- RS422, RS423
- Number of Drivers/Receivers:
- 0/4
- Duplex:
- -
- Receiver Hysteresis:
- 60 mV
- Data Rate:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
AM26C32CD FAQ
1.How can I place an order for AM26C32CD through Aetrix?
Please submit a Request for Quotation (RFQ) for AM26C32CD 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 AM26C32CD reliable?
The price and inventory of AM26C32CD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AM26C32CD is usually 5 days.
3.What payment methods are accepted for AM26C32CD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AM26C32CD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AM26C32CD?
AM26C32CD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AM26C32CD 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 AM26C32CD?
For technical support, including AM26C32CD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AM26C32CD requirements.
6.How does Aetrix verify that AM26C32CD is sourced from the original manufacturer or authorized distributors?
All AM26C32CD 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 AM26C32CD meets industry standards.
7.What is the process for return or replacement of AM26C32CD?
All AM26C32CD units undergo pre-shipment inspection (PSI). If there is an issue with AM26C32CD, 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 AM26C32CD part is unused and in its original packaging.
Return procedure for AM26C32CD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AM26C32CD Tags
-
ATA6561-GAQW-N
Microchip Technology
-
ATA6561-GBQW-N
Microchip Technology
-
AM26LS32ACDR
Texas Instruments
-
SP485CN-L/TR
MaxLinear, Inc.
-
SP485EN-L/TR
MaxLinear, Inc.
-
SP485EEN-L/TR
MaxLinear, Inc.
-
SP485ECN-L/TR
MaxLinear, Inc.
-
THVD1400DR
Texas Instruments
-
AM26C31IDR
Texas Instruments
-
TLIN1021ADRQ1
Texas Instruments
-
MAX232IDR
Texas Instruments
-
AM26C32IDR
Texas Instruments
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