ISL3232E

QFN Packaged, ±15kV ESD Protected, +2.7V to +5.5V, 150nA, 250kbps, RS-232 Transmitters/Receivers

Product Status: Mass Production

OVERVIEW

The ISL3232E, ISL4221E, and ISL4223E devices are 2.7V to 5.5V powered RS-232 transmitters/receivers that meet ElA/TIA-232 and V.28/V.24 specifications, even at VCC = 3.0V. They provide ±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 hand-held products where the low operational power consumption and even lower standby power consumption are critical. Efficient on-chip charge pumps, coupled with manual and automatic powerdown functions, reduce the standby supply current to a 150nA 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 ISL4221E is a 1 driver, 1 receiver device and the ISL3232E and ISL4223E are 2 driver, 2 receiver devices that, coupled with the 5mmx5mm QFN package, provide the industry’s smallest, lowest power serial port suitable for PDAs, and hand-held applications. The 5mmx5mm QFN requires 40% less board area than a 20 Ld TSSOP, and is nearly 20% thinner.

The ISL4221E and ISL4223E versions feature an automatic powerdown function that powers down the on-chip power supply and driver circuits. Automatic powerdown occurs when an attached peripheral device is shut off or the RS-232 cable is removed, and conserves system power automatically without changes to the hardware or operating system. The ISL4221E and ISL4223E power back up automatically when a valid RS-232 voltage is applied to any receiver input.

KEY FEATURES

    • Available in near chip scale QFN (5mmx5mm) package, which is 40% smaller than a 20 Ld TSSOP
    • ESD protection for RS-232 I/O pins to ±15kV (IEC61000)
    • Meets EIA/TIA-232 and V.28/V.24 specifications at 3V
    • RS-232 compatible with VCC = 2.7V
    • On-chip voltage converters require only four external 0.1µF capacitors
    • Manual and automatic powerdown features (except ISL3232E)
    • Receiver hysteresis for improved noise immunity
    • Assured minimum data rate: 250kbps
    • Wide power supply range: single +2.7V to +5.5V
    • Low supply current in powerdown state: 150nA
    • Pb-free (RoHS compliant)

PARAMETRICS

Parameters
ISL3232E
Basic Information
生产状态
Mass Production
Rx数量
2
Tx数量
2
高ESD保护
Yes
数据率
0.5 Mbps
供电电压Vcc (最小值) (V)
2.7
供电电压Vcc (最大值) (V)
5.5
手动关闭
No
自动关闭
No
Rx禁用
No
电容值
0.1 µF
IS启用 (mA)
0.3
IS禁用
N/A µA
资质级别
Standard
供电电压Vcc范围 (V)
2.7 to 5.5
CAN 采样
YES
温度范围
-40 to +85

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