A5191HRT Series

Industrial HART-protocol modem

Catalog

Industrial HART-protocol modem

Part	Supplier Device Package	Voltage - Supply [Max]	Voltage - Supply [Min]	Mounting Type	Package / Case	Data Format	Baud Rates	Contents	Supplied Contents	Function	Utilized IC / Part	Type	Primary Attributes	Primary Attributes
ON Semiconductor A5191HRTPG-XTP	28-PLCC (11.51x11.51)	5 V	3 V	Surface Mount	28-LCC (J-Lead)	HART	1.2 k
ON Semiconductor A5191HRTNGEVB								Board(s)	Board(s)	Modem	A5191HRT	Telecom	1200 Bits Per Second	Half-Duplex Single-chip
ON Semiconductor A5191HRTPG-XTD	28-PLCC (11.51x11.51)	5 V	3 V	Surface Mount	28-LCC (J-Lead)	HART	1.2 k

Catalog

Industrial HART-protocol modem

Key Features

• Low power

• Bell 202 shift frequencies of 1200 Hz and 2200 Hz

• Single-chip, half-duplex 1200 bits per second FSK modem

• Transmit-signal wave shaping

• Receive band-pass filter

• Meets HART physical layer requirements

• CMOS compatible

Description

A5191HRT is a single-chip, CMOS modem for use in highway addressable remote transducer (HART) field instruments and masters. The modem and a few external passive components provide all of the functions needed to satisfy HART physical layer requirements including modulation, demodulation, receive filtering, carrier detect, and transmit-signal shaping. The A5191HRT is pin-compatible with the SYM20C15. See the Pin Description and Functional Description sections for details on pin compatibility with the SYM20C15. The A5191HRT uses phase continuous frequency shift keying (FSK) at 1200 bits per second. To conserve power, the receive circuits are disabled during transmit operations and vice versa. This provides the half-duplex operation used in HART communications.