MC74LVXC3245DT ,LOW-VOLTAGE CMOS**SEMICONDUCTOR TECHNICAL DATA * **# * *#** *#&**"** **!$* *%*"* "*"* *#"*#"! ** ** *&!"**!The 74 ..
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MC74LVXC3245-MC74LVXC3245DT
LOW-VOLTAGE CMOS
SEMICONDUCTOR TECHNICAL DATA-
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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. 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
Figure 1. 24–Lead Pinout (Top View)VCCB OE B0 B1 B2 B3 B4 B5 B6
VCCA T/R A0 A1 A2 A3 A4 A5 A6 A7 GND
GND GND
This document contains information on a new product. Specifications and information herein are subject to
change without notice.
PIN NAMES
