My Inquiry
My Account
Texas Instruments AM26LS32ACDE4
- Part No.:
- AM26LS32ACDE4
- Manufacturer:
- Texas Instruments
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AM26LS32ACDE4.pdf
- Description:
- IC TRANSCEIVER 0/4 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,118
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AM26LS32AC 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 ±7-V common-mode input range with ±200-mV sensitivity, features 50-mV typical input hysteresis, and provides 3-state outputs for bus interfacing - used in industrial RS-422 data links up to 1000 m.
For engineers reviewing the AM26LS32AC datasheet, AM26LS32AC pinout, AM26LS32AC application, or AM26LS32AC equivalent, key selection criteria include differential input voltage threshold (±200 mV), fail-safe open-input behavior, TTL-compatible 3-state output drive capability, and SOIC-16 package compatibility with legacy RS-422 receiver designs.
Technical Context
The AM26LS32AC implements four independent differential receivers with complementary active-high and active-low enable inputs (G and G̅), enabling flexible bus control in multi-drop systems. Its fail-safe design ensures high outputs when inputs are open or unterminated.
It uses low-power Schottky logic with increased input impedance (≥12 kΩ) and added amplification stage versus legacy AM26LS32, improving noise immunity without compromising pin compatibility. Propagation delay is 20–35 ns, and output disable times range from 21–40 ns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.75 V to 5.25 V - ensures stable operation with standard 5-V TTL/CMOS logic rails and bypass capacitor support. |
| Common-Mode Input Range | ±7 V - enables robust reception across long cables with ground potential differences in factory automation or motor drives. |
| Differential Sensitivity | ±200 mV - reliably detects valid RS-422 signals even under high EMI or marginal signal integrity conditions. |
| Input Hysteresis | 50 mV typical - suppresses false triggering from slow-rising or noisy differential inputs on unterminated lines. |
| Output Drive | 8 mA sink / –440 µA source - directly interfaces with TTL loads and supports wired-OR bus topologies via 3-state control. |
| Propagation Delay | 20–35 ns - supports data rates up to ~10 Mbps in point-to-point configurations with controlled trace lengths. |
| Operating Temperature | 0°C to 70°C - qualified for commercial-grade industrial control, ATM, and smart grid endpoint equipment. |
Pinout & Package
AM26LS32AC is packaged in a 16-pin SOIC (D package), 9.9 mm × 6 mm body size, with standard 1.27-mm pitch. Pin 1 is located at the top-left corner adjacent to the index mark.
| 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 for threshold comparison. |
| 1B, 2B, 3B, 4B | Differential inverting input | Accepts negative leg of RS-422 differential pair; defines VID = VA – VB for receiver decision. |
| 1Y, 2Y, 3Y, 4Y | Logic-level output | TTL-compatible 3-state outputs; high-impedance when both G and G̅ are inactive. |
| G | Active-high enable input | Drives all four receivers active when logic high; tied to VCC for default-enable configuration. |
| G̅ | Active-low enable input | Drives all four receivers active when logic low; tied to GND for default-enable configuration. |
| VCC | Positive supply | 5-V power rail; requires local 0.1-µF ceramic bypass capacitor per TI layout guidelines. |
| GND | Ground reference | Return path for supply and signal currents; must be low-impedance and separated from noisy digital grounds. |
Key Features
| Feature | Design Value |
|---|---|
| RS-422/RS-423 compliance | Meets ANSI TIA/EIA-422-B and TIA/EIA-423-B electrical requirements - ensures interoperability with certified transceivers and cabling. |
| Fail-safe open-input | Outputs default high when A/B inputs are floating or disconnected - prevents undefined bus states in cable fault scenarios. |
| Complementary enable logic | Supports either active-high (G) or active-low (G̅) control - simplifies interface with diverse MCU GPIO or FPGA I/O standards. |
| High input impedance | ≥12 kΩ minimum - minimizes loading on shared RS-422 buses, allowing more receivers per segment than legacy devices. |
| Low-power Schottky architecture | 70 mA max supply current - reduces thermal load in dense industrial PCB layouts while maintaining speed. |
Applications
| Factory Automation | ATM & Cash Counters |
|---|---|
|
Use Scenario: Interfacing PLC I/O modules with remote sensors over 300-m twisted-pair wiring in electrically noisy plant environments. IC Role / Device Role / Timing Role: Differential line receiver converting RS-422 signals to TTL logic for microcontroller input capture. Use Value: ±7-V common-mode range rejects ground-loop noise; 50-mV hysteresis prevents chatter on slow-rising encoder or limit-switch signals. |
Use Scenario: Receiving transaction status and bill validation data from peripheral modules in bank-grade ATMs. IC Role / Device Role / Timing Role: Isolating and conditioning differential command/response streams between main controller and cash-handling subsystems. Use Value: Fail-safe high output ensures safe default state during cable disconnect or power sequencing faults - critical for audit trail integrity. |
| Smart Grid Endpoints | AC & Servo Motor Drives |
|
Use Scenario: Reading metering and relay status from distributed RTUs via daisy-chained RS-422 links in outdoor substations. IC Role / Device Role / Timing Role: Signal conditioning front-end for serial communication interfaces in utility-grade endpoint controllers. Use Value: 0°C to 70°C rating matches industrial enclosure specs; 12-kΩ input impedance allows >32 receivers on one bus segment. |
Use Scenario: Capturing position feedback (e.g., resolver or encoder signals) and motion commands across motor control cabinets. IC Role / Device Role / Timing Role: Robust differential receiver for SSI or proprietary serial feedback protocols running over shielded twisted pair. Use Value: ±200-mV sensitivity ensures reliable decoding of low-amplitude differential signals from analog encoders under EMI stress. |
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 ±12-V common-mode range; 30-mV hysteresis; 5-V only; no complementary enables. | Designed for RS-485 half-duplex networks; lacks dual-enable flexibility for RS-422 point-to-point use. | Prefer AM26LS32AC where dual-enable control or fail-safe open-input behavior is required. |
| DS3695MX | ±15-V common-mode range; ±500-mV sensitivity; higher ICC (100 mA); no hysteresis. | Optimized for RS-423 unbalanced transmission; not rated for RS-422 balanced mode per datasheet. | Choose AM26LS32AC for RS-422-compliant balanced links requiring tight ±200-mV detection thresholds. |
Compared with SN65LBC179DR and DS3695MX, the AM26LS32AC uniquely combines RS-422 compliance, dual-enable logic, fail-safe open-input behavior, and ±200-mV sensitivity - making it optimal for deterministic industrial serial links where signal integrity and default-state safety are critical.
Availability
AM26LS32AC is available at Aetrix Electronics and suitable for factory automation, ATM/cash counter systems, and smart grid endpoint designs requiring stable component supply, long-lifecycle support, and RoHS-compliant sourcing.
Supply support for AM26LS32AC 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 focused on analog and embedded processing technologies, serving industrial, automotive, and communications markets with high-reliability components.
The AM26LS32AC belongs to TI's legacy RS-422/RS-423 receiver product line, engineered for noise-immune digital data transmission in harsh industrial environments using balanced differential signaling.
FAQ
What is the maximum cable length supported by AM26LS32AC in RS-422 mode?
The AM26LS32AC supports RS-422 data transmission up to 1000 meters, as confirmed in TI's official description. This capability relies on its ±7-V common-mode range and ±200-mV differential sensitivity to maintain signal integrity over long, noisy twisted-pair runs. Actual achievable length depends on data rate, cable quality, and termination - at 100 kbps, full 1000-m reach is attainable with proper 100-Ω termination.
Does AM26LS32AC require external termination resistors?
Yes, AM26LS32AC requires external termination at the far end of the RS-422 bus to prevent signal reflections. TI recommends a resistor matching the cable's characteristic impedance (typically 100 Ω ±20%). The device itself does not integrate termination; it relies on external 100-Ω resistors placed at the last receiver node, as shown in Figure 9-1 of the AM26LS32AC datasheet.
Can AM26LS32AC operate with 3.3-V logic levels?
No, AM26LS32AC is specified only for 5-V operation (4.75–5.25 V). Its input thresholds (VIT+ = 0.2 V, VIT– = –0.2 V) and output drive (VOH ≥ 2.7 V at 4.75 V) are TTL-compatible but not 3.3-V logic level compliant. Using it with 3.3-V controllers requires level-shifting circuitry on enable and output lines to avoid undervoltage operation or damage.
How does the fail-safe feature work on AM26LS32AC?
The AM26LS32AC's fail-safe design guarantees high outputs when differential inputs (A/B) are open, shorted, or unterminated. This is achieved via internal biasing that forces the receiver comparator output high under zero-differential-voltage conditions. As stated in the datasheet, "When the inputs are open, the fail-safe design makes sure the outputs always are high," preventing undefined logic states during cable faults.
Is AM26LS32AC pin-compatible with older AM26LS32 variants?
Yes, AM26LS32AC maintains identical pinout and footprint with legacy AM26LS32 devices in SOIC-16 (D), PDIP-16 (N), and SOP-16 (NS) packages. TI explicitly states interchangeability in the datasheet: "The AM26LS32A and AM26LS33A incorporate an additional stage of amplification… however, this does not affect interchangeability in most applications." Electrical timing differs slightly, but layout and routing remain unchanged.
AM26LS32ACDE4 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:
- 50 mV
- Data Rate:
- -
- Voltage - Supply:
- 4.75V ~ 5.25V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
AM26LS32ACDE4 FAQ
1.How can I place an order for AM26LS32ACDE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for AM26LS32ACDE4 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 AM26LS32ACDE4 reliable?
The price and inventory of AM26LS32ACDE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AM26LS32ACDE4 is usually 5 days.
3.What payment methods are accepted for AM26LS32ACDE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AM26LS32ACDE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AM26LS32ACDE4?
AM26LS32ACDE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AM26LS32ACDE4 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 AM26LS32ACDE4?
For technical support, including AM26LS32ACDE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AM26LS32ACDE4 requirements.
6.How does Aetrix verify that AM26LS32ACDE4 is sourced from the original manufacturer or authorized distributors?
All AM26LS32ACDE4 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 AM26LS32ACDE4 meets industry standards.
7.What is the process for return or replacement of AM26LS32ACDE4?
All AM26LS32ACDE4 units undergo pre-shipment inspection (PSI). If there is an issue with AM26LS32ACDE4, 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 AM26LS32ACDE4 part is unused and in its original packaging.
Return procedure for AM26LS32ACDE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AM26LS32ACDE4 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
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
