A5191HRTLG-XTP

Overview

The A5191HRTLG-XTP is a single-chip CMOS modem designed for Highway Addressable Remote Transducer (HART) field instruments and masters. It operates within an industrial temperature range of −40°C to +85°C and supports a supply voltage from 3.0 V to 5.5 V. The device implements phase continuous frequency shift keying (FSK) at a baud rate of 1200 bits per second, utilizing Bell 202 shift frequencies of 1200 Hz and 2200 Hz. It is housed in a 32-pin LQFP package and shipped in tape and reel configurations with a quantity of 2500 units.

Feature Summary

• Integrates half-duplex FSK modulation and demodulation with transmit-signal wave shaping and receive band-pass filtering.
• Features low power consumption optimized for intrinsically safe applications by disabling receive circuits during transmission.
• Includes internal oscillator requiring only a 460.8 kHz crystal or ceramic resonator, compatible with 3.3 V or 5 V microcontrollers.

Applications

• HART multiplexers
• HART modem interfaces
• 4-20 mA loop powered transmitters

Procurement Notes

Verify the specific ordering suffix XTP confirms the 2500-unit tape and reel shipping configuration. Confirm the L suffix indicates the 32-pin LQFP package type. Ensure the component meets RoHS compliance standards as indicated by the Green designation. Cross-reference the full part number against current onsemi availability lists to confirm active status.

Selection Notes

Select this component when designing HART physical layer interfaces requiring a single-chip solution. Ensure the design accommodates a 460.8 kHz clock source via the internal oscillator or external input. Verify that the system power supply remains within the 3.0 V to 5.5 V operating range. Confirm compatibility with the required 32-pin LQFP footprint and thermal management requirements for the industrial temperature grade.

Part Context

This part belongs to the A5191HRT family of HART modems manufactured by onsemi. It shares functional specifications with other variants such as the PLCC and QFN packages but differs in physical form factor and shipping configuration. The device satisfies standard HART physical layer requirements including modulation, demodulation, and carrier detection functions.

Replacement Considerations

Direct replacements include other A5191HRT variants with different packages, such as A5191HRTNG-XTP for QFN or A5191HRTPG-XTP for PLCC. Note that A5191HRTPG-XTP has been marked as discontinued in recent datasheet revisions. Verify pinout compatibility across package types before substitution.