LTC1689IS

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LTC1689IS

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RS-485 Interface IC LTC1689 - 100Mbps RS485 Hot Swapable Quad Drivers

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Specifications

Attribute Value

Overview

Description

The LTC1689IS is a low-power, high-speed quad differential line receiver designed for data communication systems. It operates with a single 5V supply and is compatible with EIA-422 and EIA-485 standards. The device is capable of handling data rates up to 52Mbps, making it suitable for high-speed data transmission applications.
Key features of the LTC1689IS include a wide common-mode range, which allows it to operate effectively in electrically noisy environments. It also boasts high input impedance and a fail-safe feature that ensures a known output state when the input is open, shorted, or terminated but undriven. The device's low power consumption is beneficial for power-sensitive applications.
The LTC1689IS is packaged in an 8-pin SO (Small Outline) package, making it compact for use in space-constrained designs. Its robust performance, combined with ease of integration, makes it an ideal choice for reliable and efficient data communication in various industrial and commercial applications.

Equivalent

The LTC1689IS is a dual high-speed differential line driver designed for driving RS485 and RS422 communication lines. Equivalent products include:
1. MAX485
2. SN75176A
3. ADM485
4. DS3695
5. SN65HVD485E
These alternatives provide similar functionalities for differential line driving in RS485 and RS422 applications, but specific features and performance metrics may vary. Always refer to the datasheets to ensure compatibility for your specific needs.

Features

The LTC1689IS is a high-speed RS485/RS422 transceiver, ideal for differential data transmission in industrial and commercial applications. Key features include:
1. Data Rate: Supports up to 52Mbps, enabling rapid data communication.
2. Low Power Consumption: Designed to minimize power usage, making it suitable for battery-powered devices.
3. Fail-Safe: Includes fail-safe receiver inputs, ensuring a known output state when inputs are floating or terminated.
4. ESD Protection: Offers high electrostatic discharge (ESD) protection to safeguard against voltage spikes and electrical surges.
5. Supply Voltage Range: Operates efficiently over a wide supply voltage range, enhancing versatility.
6. Thermal Shutdown: Integrated thermal shutdown feature prevents overheating, protecting the device from damage.
7. Small Package Size: Comes in an SO-8 package, allowing for compact circuit designs.
8. Robust Performance: Provides reliable operation in noise-prone environments, essential for industrial settings.
These features make the LTC1689IS well-suited for applications requiring fast and reliable data transmission over long distances.

Pinout

The LTC1689IS is a high-speed, differential, PECL (Positive Emitter-Coupled Logic) line driver/receiver. It comes in an 8-pin SOIC (Small Outline Integrated Circuit) package. Here's a brief overview of its pin configuration and functions:
1. VCC (Pin 1): Positive supply voltage.
2. INA (Pin 2): Non-inverting PECL input (Line Receiver).
3. /INA (Pin 3): Inverting PECL input (Line Receiver).
4. OUTA (Pin 4): Non-inverting PECL output (Line Driver).
5. /OUTA (Pin 5): Inverting PECL output (Line Driver).
6. INB (Pin 6): Inverting PECL input (Line Receiver).
7. /INB (Pin 7): Non-inverting PECL input (Line Receiver).
8. GND (Pin 8): Ground.
The device is typically used for high-speed data transmission over long distances in telecommunication and data communication systems. It ensures signal integrity by converting differential signals to PECL levels, suitable for driving long cable runs or interfacing with PECL-compatible devices.

Manufacturer

The LTC1689IS is manufactured by Linear Technology Corporation, which is known for designing, manufacturing, and marketing a broad line of high-performance analog integrated circuits. Linear Technology specializes in products that include amplifiers, power management, data converters, interface circuits, and more, catering to a variety of industries such as telecommunications, automotive, industrial, and consumer electronics. In 2017, Linear Technology was acquired by Analog Devices, Inc., another leading company in the semiconductor industry that focuses on analog, mixed-signal, and digital signal processing technology. This acquisition expanded Analog Devices' portfolio and enhanced its position in the analog technology market.

Application

The LTC1689IS is a high-speed, differential driver designed for RS485/RS422 communication applications. It is typically used in areas where fast data transmission is crucial, such as industrial automation systems, process control networks, and building automation. Its ability to handle long cable lengths and its robustness against electrical noise make it suitable for use in harsh environments. Additionally, it can be employed in applications requiring reliable communication over twisted-pair cables, including point-of-sale systems, networked security systems, and remote meter reading. Its low power consumption and high ESD protection further enhance its utility in embedded systems and other compact electronic devices.

Package

The LTC1689IS is typically available in an SOIC (Small Outline Integrated Circuit) package. This is an 8-lead surface-mount package that is commonly used for integrated circuits requiring a small form factor.

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