The ISL4260E is a QFN packaged ±15kV ESD protected, +3V to +5.5V, 150nA, 250kbps RS-232 transmitter/receiver with separate logic supply. It meets ElA/TIA-232 and V.28/V.24 specifications, even at VCC = 3.0V. It is designed for low power consumption applications such as PDAs, palmtops, and cell phones. The device features efficient on-chip charge pumps and a manual powerdown function to reduce standby supply current to 150nA. The compact 5mm x 5mm QFN packaging and use of small, low value capacitors save board space. It guarantees data rates greater than 250kbps under worst case load conditions. The ISL4260E also includes a VL pin for adjusting logic pin output levels and input thresholds for compatibility with the external logic. The single pin powerdown function (SHDN = 0) disables all receiver and transmitter outputs and shuts down the charge pump to minimize supply current drain.
The ISL4260E is a QFN‑packaged RS‑232 transmitter/receiver designed for low‑power portable applications such as PDAs, palmtops, and cell phones. It operates from a single 3.0 V to 5.5 V supply and meets EIA/TIA‑232 and V.28/V.24 specifications while drawing only 0.3 mA in normal mode.
Key features include a dedicated V_ pin for logic‑level compatibility, an active‑low SHDN pin for manual power‑down (reducing supply current to 150 nA), and robust +15 kV ESD protection on all RS‑232 pins. The device is offered in a 5 mm × 5 mm 32‑lead QFN package and requires only four 0.1 µF external capacitors for its on‑chip charge pumps.
| Supply Voltage Range | 3.0 V to 5.5 V |
|---|---|
| Minimum Data Rate | 250 kbps |
| Normal Supply Current | 0.300 mA |
| Power‑down Supply Current | 150 nA |
| Package | 5 mm × 5 mm QFN, 32‑lead |
The device guarantees a minimum data rate of 250 kbps.
In power‑down mode the supply current drops to 150 nA.
It operates from a single supply of 3.0 V to 5.5 V.