PI90LV032AWE

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PI90LV032AWE Application Field and Working Principle

PI90LV032AWE is a standard low voltage RS-232 differential transmitter/receiver/driver by NXP Semiconductor (formerly Philips Semiconductor). It is suitable for point-of-sale (POS) applications, such as cash drawers, or other situations requiring a serial RS-232 interface.

This product was designed with two primary goals: reliability and low cost. The key features of the PI90LV032AWE include:

• High data rates (up to 1.5 Megabits per second)
• Low power consumption (1.2 to 5.0 V)
• Low power consumption during standby
• Internal protection diodes for voltage/current protection
• Automatic shutdown control
• High levels of EMI noise immunity
• Integrated receiver limiter with selectable hysteresis level

In order to meet the specific cost reduction targets set by NXP Semiconductor, the PI90LV032AWE was designed as a cost-effective solution for high volume applications, such as point-of-sale terminals, industrial automation, and other applications requiring a reliable and secure RS-232 interface.

The PI90LV032AWE is a differential transmitter/receiver/driver that is used to transfer data between two or more digital circuits. It consists of a receiver with two differential inputs, two differential outputs, a transmitter, and two enable pins for receiver and transmitter enable/disable control. The receiver and transmitter enable/ disable pins must be held to logic high for normal operation. The PI90LV032AWE is designed for use in a two-wire serial data transmission system.

The PI90LV032AWE supports full-duplex data transmission, allowing data to be transferred from one device to another and vice versa. The receiver portion of the PI90LV032AWE supports various data formats such as asynchronous and synchronous formats, with data rates up to 1.5 Megabits per second (Mbps). In asynchronous mode, the PI90LV032AWE supports 8-bit, 10-bit, 12-bit, and 16-bit data word lengths. In synchronous mode, data words of 8, 9, 10, 11, 12 and 16 bits are supported. The interface also supports error detection protocols such as parity, check digits, and start/stop bits.

The receiver and transmitter enable/disable pins allow power savings as they can be gated off to save power when not in use. The receiver features a limiter circuit that can be set to provide a desired amount of hysteresis in order to avoid false triggering and reduce EMI interference. The PI90LV032AWE also features protection diodes in the collector, emitter, and diode-bonded outputs, which protect the receiver and transmitter circuits from voltage and current surges.

The PI90LV032AWE is suitable for various point-of-sale applications such as cash drawers, POS terminals, industrial automation, and other situations requiring a reliable and secure RS-232 interface. Its low power consumption and integrated protection diodes make it an ideal choice for these types of applications. The PI90LV032AWE supports high data rates with little or no external components, making it a cost-effective solution for high volume applications in need of an RS-232 interface.

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