概览
描述
The ISL83220E is a 3. 0V to 5. 5V powered RS-232 transmitter/receiver that meets ElA/TIA-232 and V. 28/V. 24 specifications, even at VCC = 3. 0V. It provides ±15kV ESD protection (IEC61000-4-2 Air Gap and Human Body Model) on transmitter outputs and receiver inputs (RS-232 pins). Targeted applications are PDAs, Palmtops, and notebook and laptop computers in which the low operational power consumption and even lower standby power consumption is critical. Efficient on-chip charge pumps, coupled with a manual powerdown function, reduce the standby supply current to a µA trickle. Small footprint packaging and the use of small, low value capacitors ensure board space savings. Data rates greater than 250kbps are ensured at worst case load conditions. The ISL83220E is fully compatible with 3. 3V only systems, mixed 3. 3V and 5. 0V systems, and 5. 0V only systems.
特性
- Pb-free (RoHS compliant)
- ESD protection for RS-232 I/O pins to ±15kV (IEC61000)
- Drop-in replacement for SP3220E
- Meets EIA/TIA-232 and V.28/V.24 specifications at 3V
- RS-232 compatible outputs at 2.7V
- Latch-up free
- On-chip voltage converters require only four external 0.1µF capacitors
- Manual powerdown feature with receivers active
- Separate receiver enable pin
- RX and TX hysteresis for improved noise immunity
- Ensured minimum data rate: 250kbps
- Ensured minimum slew rate: 6V/µs
- Wide power supply range: Single +3V to +5.5V
- Low supply current in powerdown state: 1µA
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