Home > Integrated Circuits ICs > AM26LV31EIDR

AM26LV31EIDR

Quad RS-422 driver, 3.3V, 32MHz, ±15kV ESD, SOIC-16

8497

Effective Inventory

Go to Inquiry

Image for reference only

Manufacturer Part：

AM26LV31EIDR

Package：

SOIC-16 (9.9 x 6.0 x 1.5 mm)

Brand：

Product Categories：

Integrated Circuits ICs, Interface ICs

Other recommendations you may be interested in.

C1206C226Z9VAC-TU

Description

Product Overview

The AM26LV31EIDR is a quad differential line driver from Texas Instruments with ±15 kV IEC ESD protection. Operating from a single 3.3V supply, it meets TIA/EIA-422-B standards, supports up to 32 MHz switching rate, and provides controlled rise/fall times for balanced bus transmission in a 16-pin SOIC package.

Key Specifications

Drivers / Receivers	4 / 0
Protocol	RS-422 / RS-485
Supply Voltage	3.0 V to 3.6 V (3.3 V nominal)
Switching Rate	Up to 32 MHz
Propagation Delay	8 ns typical
Pulse Skew	500 ps typical
Output Drive Current	±30 mA
Differential Output Voltage	2.6 V typical (100 Ω load)
Rise/Fall Time	5 ns typical (controlled)
ESD Protection	±15 kV HBM, ±8 kV IEC contact, ±15 kV IEC air gap
Operating Temperature	-40°C to +85°C
Package	SOIC-16 (D)

Features

Meets TIA/EIA-422-B and ITU V.11 standards
3.3V single supply operation
±15 kV IEC ESD protection on bus pins
32 MHz maximum switching rate
8 ns typical propagation delay
500 ps typical pulse skew
±30 mA output drive current
Controlled 5 ns rise and fall times
5V logic input compatible with 3.3V supply
Three-state outputs
Glitch-free power-up/power-down
Short-circuit protection on driver outputs

Applications

RS-422 balanced bus transmission
Industrial communication networks
Motor encoder interfaces
Point-to-point and multidrop data links
Backplane transceiver logic

Product Introduction:AM26LV31EIDR Product Introduction

The AM26LV31E is a quad differential line driver with three-state outputs and ±15 kV IEC ESD protection from Texas Instruments. It is designed for balanced bus transmission at switching rates up to 32 MHz, meeting or exceeding TIA/EIA-422-B and ITU V.11 requirements. The driver operates from a single 3.3 V supply while accepting 5 V logic inputs. Features include 8 ns propagation delay, 500 ps pulse skew, ±30 mA output drive, and controlled 5 ns rise/fall times for minimized EMI. The device supports Ioff partial power-down mode operation and provides glitch-free power-up/power-down protection with driver output short-circuit protection.

Working Principle:AM26LV31EIDR Working Principle

The AM26LV31E contains four independent differential line drivers. Each driver accepts a single-ended logic input and produces a complementary pair of output signals (Y and Z) with controlled transition times. When the driver enable is active, the input is converted to a differential current drive of ±30 mA into a balanced load. The controlled 5 ns rise/fall times minimize EMI and reflections on twisted-pair transmission lines. The 3.3 V supply powers an internal reference and bias network that sets the output common-mode voltage and drive current. The three-state outputs go high-impedance when the enable pin is deasserted. The ESD protection clamps on the bus pins absorb transient energy from electrostatic discharge events up to ±15 kV (HBM and IEC air gap) and ±8 kV (IEC contact). The Ioff feature ensures the outputs remain in a known state during partial power-down.

Pin Description:AM26LV31EIDR Pin Definition and Functions

Pin	Name	Type	Description
1	1Y	Output	Driver 1 non-inverting output
2	1Z	Output	Driver 1 inverting output
3	2Y	Output	Driver 2 non-inverting output
4	2Z	Output	Driver 2 inverting output
5	GND	Power	Ground
6	3Y	Output	Driver 3 non-inverting output
7	3Z	Output	Driver 3 inverting output
8	4Y	Output	Driver 4 non-inverting output
9	4Z	Output	Driver 4 inverting output
10	4A	Input	Driver 4 input
11	3A	Input	Driver 3 input
12	G	Input	Enable input (active high)
13	2A	Input	Driver 2 input
14	1A	Input	Driver 1 input
15	VCC	Power	Supply voltage (3.0-3.6V)
16	GND	Power	Ground

Application Scenarios:In which products and applications isAM26LV31EIDR used

Industrial Communication: RS-422 bus transmission up to 32 MHz for high-speed factory automation networks
Motor Encoder Interface: Differential driver for transmitting quadrature encoder signals over long cables
Multidrop Data Links: ±15 kV ESD protection ensures robustness in multi-node RS-422 networks
Backplane Signaling: Controlled 5 ns rise/fall times minimize reflections on PCB backplanes
5V/3.3V Mixed Systems: 5V logic input compatible with 3.3V supply bridges voltage domains

Alternative Models:What chips are recommended as replacements for AM26LV31EIDR

Model	Manufacturer	Key Difference	Package	Speed
AM26LV31EIPWR	TI	TSSOP-16 package option for space-constrained board layouts	TSSOP-16	32Mbps
AM26LV31EIRGYR	TI	VQFN-16 package (4×3.5mm) for minimal footprint ultra-compact designs	VQFN-16	32Mbps
SN65LV31DW	TI	Similar quad RS-422 driver in SOIC-16, 3.3V supply with IEC ESD protection	SOIC-16	32Mbps
MC3487DR2G	onsemi	5V RS-422 quad driver for legacy 5V systems with separate enable controls	SOIC-16	10Mbps
DS26LV31TMX	MaxLinear	3.3V RS-422 quad driver with similar pinout and ESD protection rating	SOIC-16	32Mbps
SN65HVD31DR	TI	Enhanced version with ±16kV IEC ESD and extended common-mode range for industrial	SOIC-16	32Mbps

The AM26LV31E is a 3.3V quad RS-422 differential line driver with individual driver enables. For 5V systems, the MC3487 provides equivalent functionality. The SN65HVD31 offers enhanced ESD protection for harsh industrial environments.