| # of Tx | 3 |
| # of Rx | 3 |
| High ESD | Yes |
| Manual Shutdown | Yes |
| Auto Shutdown | Enhanced |
| Rx Disable | No |
| Data Rate (Mbps) | 0.5 |
| Cap. Value (μF) | 0.1 |
| IS Enabled (mA) | 0.3 |
| IS Disabled (μA) | 0.3 |
| VCC Range (V) | 3 to 5.5 |
| VCC (min) (V) | 3 |
| VCC (max) (V) | 5.5 |
Powerdown and a Separate Logic Supply The Intersil ISL4270E is a 3.0V to 5.5V powered RS-232 transceiver which meets ElA/TIA-232 and V.28/V.24 specifications, even at VCC = 3.0V. Additionally, 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 where the low operational, and even lower standby power consumption is critical. Efficient on-chip charge pumps, coupled with manual and enhanced automatic powerdown functions, reduce the standby supply current to a 300nA trickle. Tiny 5mm x 5mm Quad Flat No-Lead (QFN) packaging, and the use of small, low value capacitors ensure board space savings as well. Data rates greater than 250kbps are guaranteed at worst case load conditions.
The ISL4270E features a VL pin that adjusts the logic pin output levels and input thresholds to values compatible with the VCC powering the external logic (e.g., a UART).
This device includes an enhanced automatic powerdown function which powers down the on-chip power-supply and driver circuits. This occurs when all receiver and transmitter inputs detect no signal transitions for a period of 30 seconds. It power back up, automatically, whenever it senses a transition on any transmitter or receiver input.
| 芯片型号 | 产品状态 | 温度范围 | 封装尺寸图 | 潮湿敏感度等级MSL | 美元价格US $ |
| ISL4270EIRZ | 量产 | 工业级 | 32 Ld QFN | 3 | 2.42 |
| ISL4270EIRZ-T | 量产 | 工业级 | 32 Ld QFN T+R | 3 | 2.42 |
| ISL4270EIR | 停产 | 工业级 | 32 Ld QFN | 1 | N/A |
| ISL4270EIR-T | 停产 | 工业级 | 32 Ld QFN T+R | 1 | N/A |