A5191HRTNG-XTD

Overview

The A5191HRTNG-XTD 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 power supply voltage from 3.0 V to 5.5 V. The device implements phase continuous frequency shift keying (FSK) at a bit rate of 1200 bits per second, utilizing Bell 202 shift frequencies of 1200 Hz and 2200 Hz. It is housed in a 32-pin QFN package with the N suffix.

Feature Summary

• Single-chip half-duplex FSK modem supporting HART physical layer requirements
• Integrated transmit-signal wave shaping and receive band-pass filter
• Low power consumption suitable for intrinsically safe applications
• 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 XTD indicates tube/tray shipping configuration rather than tape and reel. Confirm current availability status as some variants in this family have been discontinued. Ensure the component matches the 32-pin QFN mechanical outline CASE 488AM. Cross-reference the marking diagram for correct identification upon receipt.

Selection Notes

Select this variant when a 32-pin QFN package is required for the PCB layout. Verify that the design accommodates the exposed pad connection to VSS. Ensure the external clock source meets the 460.8 kHz requirement using either a ceramic resonator or external clock signal. Check compatibility with the host microcontroller logic levels.

Part Context

The A5191HRT series includes multiple package options such as PLCC and LQFP. The NG suffix specifically denotes the 32-pin QFN package type. This part belongs to the broader HART modem family used in industrial process control instrumentation. Other variants may differ in shipping configuration or pinout density.

Replacement Considerations

NCN5192 and NCN5193 are documented similar parts within the same product family. Verify pin compatibility and electrical specifications before substitution. Check if the replacement part supports the same package type and operating temperature range.