MC74LVXC3245数据手册集成电路（IC）的转换器电平移位器规格书PDF

描述 Description

The 74LVXC3245 is a 24-pin dual-supply, octal configurable voltage interface transceiver especially well suited for PCMCIA and other real time configurable I/O applications. The VCCA pin accepts a 3V supply level; the A port is a dedicated 3V port. The VCCB pin accepts a 3V-to-5V supply level. The B port is configured to track the VCCB supply level. A 5V level on the VCCB pin will configure the I/O pins at a 5V level and a 3V VCCB will configure the I/O pins at a 3V level. The A port interfaces with a 3V host system and the B port to the card slots. This device will allow the VCCB voltage source pin and I/O pins on the B port to float when OE is High. This feature is necessary to buffer data to and from a PCMCIA socket that permits PCMCIA cards to be inserted and removed during normal operation. The Transmit/Receive (T/R) input determines the direction of data flow. Transmit (active-High) enables data from the A port to B port. Receive (active-Low) enables data from the B port to the A port.

特性 Features

• Bidirectional Interface Between 3V and 3V/5V Buses
• Control Inputs Compatible with TTL Level
• Outputs Source/Sink Up to 24mA
• Guaranteed Simultaneous Switching Noise Level and Dynamic Threshold Performance
• Available in SOIC and TSSOP Packages
• Flexible VCCB Operating Range
• Allows B Port and VCCB to Float Simultaneously When OE Is High
• Functionally Compatible with the 74 Series 245 PIN Pins OE T/R A0-A7 B0-B7
• Pb-Free Packages are Available*

简介

MC74LVXC3245属于集成电路（IC）的转换器电平移位器。由制造生产的MC74LVXC3245转换器，电平移位器逻辑转换器或电平移位器 IC 可用于在数字逻辑设备之间传递信息，这些设备可在不同/不兼容的供电电压下工作，或可实现不同的信令方式。例如，可以将需要 5 V 电源的数字输出传感器连接到具有 3.3 V I/O 电源的 FPGA，或者在 CMOS 或 TTL 等单端信令方式与 PECL 或 LVDS 等差分技术之间进行转换。