rs-232

Transceiver Chip Handles RS 232 RS 485 and RS 422

Transceiver Chip Handles RS-232, RS-485 and RS-422

SP335 RS-232/RS-485/RS-422 Transceiver with Internal Termination Features Pin-Selectable Cable Termination No External Resistors Required for RS-485/422 Termination or Biasing Robust ESD Protection: ±15kV IEC 61000-4-2 Air Gap Discharge ± 8kV IEC 61000-4-2 Contact Discharge ±15kV Human Body Model (HBM) 20Mbps RS-485 and 1Mbps RS-232 Data Rates Pin-Selectable 250kbps Slew Limiting Single Supply Operation from +3V […]

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Fig. 1

An Inexpensive Microcontroller Based Data Logging System

INTRODUCTION Attempts to understand and analyze environmental variables need data sets that track both temporal and geographical changes. These data can be collected using networks of recording instruments or instruments connected to commercially available data loggers (e.g., Silliman and Booth, 1993), but the cost of such networks is typically in the thousands to tens of

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