ADM488/ADM489 is a full-duplex, low power, slew rate limited EIA RS-485 transceiver. It meets EIA RS-485 and RS-422 standards with a data rate of 250 kbps. The transceiver operates on a single 5V ± 10% supply voltage and has a -7V to +12V bus common-mode range. It features a 12 kΩ input impedance, 2 kV EFT protection, high electromagnetic immunity, reduced slew rate for low EM interference, short-circuit protection, and excellent noise immunity. The transceiver is suitable for low power RS-485 and RS-422 systems, DTE-DCE interfaces, packet switching, local area networks, data concentration, and integrated services digital network (ISDN) applications.
The ADM488 and ADM489 are low‑power, full‑duplex differential line transceivers that meet EIA RS‑485 and RS‑422 standards. They operate from a single 5 V ±10 % supply and include features such as reduced slew rate, short‑circuit protection, and high electromagnetic immunity.
The devices are available in PDIP, SOIC, and TSSOP packages and support up to 32 transceivers on a single bus. Detailed specifications, timing diagrams, pin configurations, and test circuits are provided for designers.
| Supply voltage (VCC) | 5 V ±10 % |
|---|---|
| Input impedance | 12 kΩ |
| Maximum data rate | 250 kbps |
Both parts support a maximum data rate of 250 kbps.
The devices include short‑circuit protection and a thermal shutdown circuit that forces the driver output to high‑impedance when excessive temperature is detected.