LTC1519IS#PBF

Drivers, Receivers, Transceivers Overview

The LTC1519IS#PBF is a high-speed, precision delay RS485 quad line receiver manufactured by Analog Devices Inc. It operates from a single 5V supply and supports data rates up to 52Mbps. The device features four independent receivers in a 16-lead SOIC package with an industrial temperature range of -40°C to +85°C. Propagation delay is guaranteed within a narrow window of 18.5ns ±3.5ns over the commercial range (-40°C to +85°C). Typical skew for both tPLH/tPHL and channel-to-channel transitions is 500ps. The input common mode range spans -7V to 12V, ensuring compatibility with standard RS485/RS422 bus environments.

Drivers, Receivers, Transceivers Feature Summary

• Precision propagation delay architecture ensures stable timing performance across wide input common mode and temperature variations.
• Hot Swap capability allows connection to live buses without loading data lines due to high input resistance when unpowered.
• Fail-safe operation guarantees a logic high output state when inputs are shorted or left floating within the entire common mode range.

Drivers, Receivers, Transceivers Applications

• High-speed RS485 and RS422 data communication systems
• STS-1/OC-1 optical carrier data reception
• PECL line receiving applications

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix IS#PBF confirms the industrial temperature grade (-40°C to +85°C) and lead-free packaging status. Confirm the 16-lead SOIC package dimensions match the target PCB footprint. Ensure the voltage supply aligns with the recommended 5V ±5% specification for optimal electrical characteristics.

Drivers, Receivers, Transceivers Selection Notes

Select this component when precise timing synchronization is critical for multi-channel differential signaling. The LTC1519 offers independent enable controls for receiver pairs compared to the shared enable of the LTC1518. Consider the 500ps typical skew for minimizing duty cycle distortion in clocked data systems requiring high-speed transmission over twisted pair media.

Drivers, Receivers, Transceivers Part Context

The LTC1519 belongs to the LTC1518/LTC1519 family of high-speed precision delay receivers. It is pin-compatible with the older LTC488 and LTC489 series but provides significantly higher data rate capabilities and tighter propagation delay tolerances. This lineage ensures backward compatibility while upgrading system performance for modern high-speed serial interfaces.

Drivers, Receivers, Transceivers Replacement Considerations

The LTC1518 is a direct pin-compatible alternative featuring a shared enable pin for all four receivers instead of the LTC1519's dual enable structure. Other related parts include the LTC1520 for rail-to-rail common mode requirements and the LTC1685 transceiver for integrated transmit/receive functionality.

Drivers, Receivers, Transceivers FAQ

How does the LTC1519 handle hot swapping on a powered bus?

The device maintains an input resistance of at least 22kΩ even when unpowered or disabled. This high impedance prevents the receiver from loading the data lines during insertion or removal, enabling safe hot swapping without disrupting active communications.

What is the fail-safe behavior if the RS485 inputs are shorted?

The LTC1519 includes a fail-safe feature that guarantees a logic high output state if the differential inputs are shorted together or left open (floating). This fault detection occurs within the entire -7V to 12V common mode input range, typically asserting the high state within 2ms.

What is the maximum data rate supported by this component?

The LTC1519 supports data rates up to 52Mbps under standard operating conditions. In specific scenarios with lower load capacitance and favorable temperatures, it can propagate signals at frequencies up to 26MHz square wave input.