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MC145488 PDF预览

MC145488

更新时间: 2024-11-26 22:36:27
品牌 Logo 应用领域
摩托罗拉 - MOTOROLA /
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8页 165K
描述
LOW-VOLTAGE CMOS OCTAL TRANSCEIVER

MC145488 数据手册

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SEMICONDUCTOR TECHNICAL DATA  
The MC74LCX2245 is a high performance, non–inverting octal  
transceiver operating from a 2.7 to 3.6V supply. High impedance TTL  
compatible inputs significantly reduce current loading to input drivers  
while TTL compatible outputs offer improved switching noise  
LOW–VOLTAGE CMOS  
OCTAL TRANSCEIVER  
performance. A V specification of 5.5V allows MC74LCX2245 inputs to  
I
be safely driven from 5V devices. The MC74LCX2245 is designed to  
reduce output overshoot and undershoot and is suitable for memory  
address driving and all TTL level bus oriented transceiver applications;  
especially those requiring the very quiet outputs.  
Current drive capability is 12mA at both A and B ports. The  
Transmit/Receive (T/R) input determines the direction of data flow  
through the bi–directional transceiver. Transmit (active–HIGH) enables  
data from A ports to B ports; Receive (active–LOW) enables data from B  
to A ports. The Output Enable input, when HIGH, disables both A and B  
ports by placing them in a HIGH Z condition.  
DW SUFFIX  
20–LEAD PLASTIC SOIC  
CASE 751D–04  
M SUFFIX  
20–LEAD PLASTIC SOIC EIAJ  
CASE 967–01  
Designed for 2.7 to 3.6V V  
CC  
5V Tolerant — Interface Capability With 5V TTL Logic  
Supports Live Insertion and Withdrawal  
Operation  
I  
OFF  
Specification Guarantees High Impedance When V  
= 0V  
CC  
LVTTL Compatible  
SD SUFFIX  
20–LEADPLASTIC SSOP  
CASE 940C–03  
LVCMOS Compatible  
12mA Balanced Output Sink and Source Capability  
Near Zero Static Supply Current in All Three Logic States (10µA)  
Substantially Reduces System Power Requirements  
Latchup Performance Exceeds 500mA  
DT SUFFIX  
20–LEAD PLASTIC TSSOP  
CASE 948E–02  
ESD Performance: Human Body Model >2000V; Machine Model >200V  
V
OE  
19  
B0  
18  
B1  
17  
B2  
16  
B3  
15  
B4  
14  
B5  
13  
B6  
12  
B7  
11  
CC  
20  
PIN NAMES  
Pins  
Function  
OE  
T/R  
A0–A7  
Output Enable Input  
Transmit/Receive Input  
Side A 3–State Inputs or 3–State  
Outputs  
1
2
3
4
5
6
7
9
8
10  
T/R  
A0  
A1  
A2  
A3  
A4  
A5  
A6  
A7  
GND  
B0–B7  
Side B 3–State Inputs or 3–State  
Outputs  
Figure 1. 20–Lead Pinout  
(Top View)  
This document contains information on a product under development. Motorola reserves the right to change or  
discontinue this product without notice.  
1/97  
REV 0  
Motorola, Inc. 1997  

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