Datasheet for the HIN232, an Intersil RS-232 transceiver with two drivers and two receivers powered from 5 V using an internal charge pump and external capacitors. The 659 KB PDF typically covers the wider HIN2xx family with pinouts, capacitor values, application circuits and electrical limits. It helps when diagnosing dead serial interfaces, checking charge-pump output voltages and confirming compatibility with MAX232-style parts. Verify package type and capacitor requirements before substituting another transceiver.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @datasheet. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.