HART Communication Chip

HT1200M Brief Instruction

The HT1200M 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 HT1200M is pin-compatible with the SYM20C15 and HT20C15.

HT1200M Technical Details

HT1200M Features

• Can be used in designs presently using the SYM20C15 or equivalent type chip

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

• Bell 202 shift frequencies of 1200 Hz and 2200 Hz

• 3.3V-5.0V power supply

• Transmit-signal wave shaping

• Receive band-pass filter

• Low power: optimal for intrinsically safe applications CMOS compatible

• Internal oscillator requires 460.8 kHz crystal or ceramic resonator

• Meets HART physical layer requirements

• Industrial temperature range of -40 °C to +85 °C

• Available in a 28-pin PLCC and 32-pin LQFP packages

HT1200M Further Information

HT1200M Package and Delivery