Package Information
| CAD Model: | View CAD Model |
| Pkg. Type: | QFN |
| Pkg. Code: | LJQ |
| Lead Count (#): | 32 |
| Pkg. Dimensions (mm): | 5.00 x 5.00 x 0.90 |
| Pitch (mm): | 0.5 |
Environmental & Export Classifications
| Moisture Sensitivity Level (MSL) | 3 |
| Pb (Lead) Free | Yes |
| ECCN (US) | EAR99 |
| HTS (US) | 8542.39.0090 |
| RoHS (ISL4270EIRZ-T) | Download |
Product Attributes
| Lead Count (#) | 32 |
| Carrier Type | Reel |
| Moisture Sensitivity Level (MSL) | 3 |
| Pb (Lead) Free | Yes |
| Pb Free Category | Pb-Free 100% Matte Tin Plate w/Anneal-e3 |
| Temp. Range (°C) | -40 to +85°C |
| Country of Assembly | MALAYSIA |
| Country of Wafer Fabrication | UNITED STATES |
| Charge-pump Capacitance Value (µF) | 0.1 |
| Data Rate (Mbps) | 0.5 |
| High ESD Protection | Yes |
| IS Disabled (μA) | 0.3 |
| IS Enabled (mA) | 0.3 |
| Length (mm) | 5 |
| MOQ | 6000 |
| Manual Shutdown | Yes |
| Pitch (mm) | 0.5 |
| Pkg. Dimensions (mm) | 5.0 x 5.0 x 0.90 |
| Pkg. Type | QFN |
| Price (USD) | $3.98583 |
| Qualification Level | Standard |
| Receivers (#) | 3 |
| Rx Disable | No |
| Supply Voltage Vcc (Min) (V) | 3 |
| Supply Voltage Vcc Range | 3-5.5 |
| Thickness (mm) | 0.9 |
| Transmitters (#) | 3 |
| Width (mm) | 5 |
Resources for ISL4270E
Description
The ISL4270E is a 3. 0V to 5. 5V powered RS-232 transceiver 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 notebook and laptop computers where the low operational power consumption 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. The 5mmx5mm Quad Flat No-Lead (QFN) 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 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 (for example, a UART). This device includes an enhanced automatic powerdown function that powers down the on-chip power-supply and driver circuits. Automatic powerdown occurs when all receiver and transmitter inputs detect no signal transitions for a period of 30 seconds. The ISL4270E automatically powers back up whenever it senses a transition on any transmitter or receiver input. Application Note AN9863 summarizes the features of each device comprising the 3V RS-232 family.