LTC1519CS#TRPBF

Drivers, Receivers, Transceivers Overview

The LTC1519CS#TRPBF 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 a propagation delay of 18.5ns with a tolerance of -3.5ns over the commercial temperature range (0°C to 70°C). Typical skew for both tPLH/tPHL and channel-to-channel transitions is 500ps. It provides a wide input common mode range of –7V to 12V and includes fail-safe operation that guarantees a high output state when inputs are shorted or floating. The component is housed in a 16-lead plastic SO package.

Drivers, Receivers, Transceivers Feature Summary

• Precision timing architecture ensures stable propagation delays and low skew across wide input common mode and temperature ranges.
• Integrated fail-safe mechanism guarantees a logic high output state during input short-circuit or open conditions.
• Hot Swap capability allows connection without loading data lines due to high input resistance even when unpowered.
• Short-circuit protection limits output current to prevent latchup damage during fault conditions.

Drivers, Receivers, Transceivers Applications

• High speed RS485/RS422 receivers
• STS-1/OC-1 data receivers
• PECL line receivers
• Level translators
• Fast-20/Fast-40 SCSI receivers

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging upon ordering. Confirm the 'C' grade designation corresponds to the commercial temperature range of 0°C to 70°C. Ensure the 16-lead SO package footprint matches the design requirements. Cross-reference the manufacturer part number with official Analog Devices documentation to confirm pinout compatibility with legacy parts like the LTC488.

Drivers, Receivers, Transceivers Selection Notes

Select this component for applications requiring precise timing margins in differential bus systems. The tight propagation delay window reduces system timing constraints compared to standard receivers. Consider the 500ps typical skew for minimizing duty cycle distortion in clocked data systems. Verify that the 5V supply voltage aligns with the system power rails and that the 12mA supply current fits within the thermal budget.

Drivers, Receivers, Transceivers Part Context

The LTC1519 is part of the LTC1518/LTC1519 family of high-speed precision delay receivers. It is pin-compatible with the older LTC488 and LTC489 RS485 line receivers, facilitating direct upgrades in existing designs. The device shares architectural similarities with other Linear Technology high-speed receivers but offers improved timing stability over varying common mode voltages and temperatures.

Drivers, Receivers, Transceivers Replacement Considerations

The LTC1518 is the primary functional substitute, differing only in enable pin configuration where it uses a single global enable rather than split pairs. Legacy replacements include the LTC488 and LTC489, which offer pin compatibility but lower maximum data rates of 10Mbps. Designers should verify that the reduced speed of these alternatives meets the system's bandwidth requirements.

Drivers, Receivers, Transceivers FAQ

How does the LTC1519 handle unconnected receiver inputs?

The device features an open fail-safe that guarantees a logic high output state when inputs are left floating, preventing unwanted glitches caused by noise.

What is the maximum recommended data rate for clocked parallel data transmission?

While the device supports up to 52Mbps, the maximum recommended data transmission rate for retiming parallel data using a clock signal is 25Mbps to avoid timing errors due to clock distortion.

Is the LTC1519 compatible with hot swapping?

Yes, the receiver has a high input resistance (≥22kΩ) even when unpowered or disabled, allowing it to be hot swapped without loading the data lines.