The ISL4270E is an RS-232 transceiver from Intersil with a working voltage range of 3.0-5.5V, ESD protection, and high-efficiency switch-mode power supply and low power consumption. It can be used in notebooks, PDAs and Palmtops.
The Intersil ISL4270E is a low‑power RS‑232 transceiver designed for portable devices such as PDAs, palmtops, and notebook computers. It operates from a single 3.0 V to 5.5 V supply, provides guaranteed 250 kbps data rates, and includes both manual and enhanced automatic power‑down features that reduce standby current to 300 nA.
The device is offered in a 5 mm × 5 mm Quad Flat No‑Lead (QFN) package, is RoHS‑compliant (Pb‑free), and provides +15 kV ESD protection on all RS‑232 pins. Detailed pin‑out, electrical specifications, and timing characteristics are provided for designers.
| Supply Voltage Range | 3.0 V to 5.5 V |
|---|---|
| Minimum Data Rate | 250 kbps |
| Standby Supply Current (Power‑down) | 300 nA |
| Typical Active Supply Current | 0.3 mA |
| ESD Protection | +15 kV |
| Package | 5 mm × 5 mm QFN |
| RoHS Compliance | Pb‑free |
It operates from 3.0 V up to 5.5 V.
The device guarantees a minimum data rate of 250 kbps.
Standby current is limited to 300 nA.
It offers +15 kV ESD protection on the RS‑232 pins.