MC74LCX2245 Motorola, MC74LCX2245 Datasheet

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MC74LCX2245

Manufacturer Part Number
MC74LCX2245
Description
LOW-VOLTAGE CMOS OCTAL TRANSCEIVER
Manufacturer
Motorola
Datasheet
Product Preview
Low-Voltage CMOS Octal
Transceiver
With 5V-Tolerant Inputs and Outputs
(3-State, Non-Inverting)
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
performance. A V I specification of 5.5V allows MC74LCX2245 inputs to
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.
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.
This document contains information on a product under development. Motorola reserves the right to change or
discontinue this product without notice.
1/97
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Motorola, Inc. 1997
Designed for 2.7 to 3.6V V CC Operation
5V Tolerant — Interface Capability With 5V TTL Logic
Supports Live Insertion and Withdrawal
I OFF Specification Guarantees High Impedance When V CC = 0V
LVTTL Compatible
LVCMOS Compatible
12mA Balanced Output Sink and Source Capability
Near Zero Static Supply Current in All Three Logic States (10 A)
Substantially Reduces System Power Requirements
Latchup Performance Exceeds 500mA
ESD Performance: Human Body Model >2000V; Machine Model >200V
The MC74LCX2245 is a high performance, non–inverting octal
Current drive capability is 12mA at both A and B ports. The
V CC
T/R
20
1
OE
A0
19
2
B0
A1
18
3
Figure 1. 20–Lead Pinout
B1
A2
17
4
(Top View)
B2
A3
16
5
B3
A4
15
6
1
B4
A5
14
7
B5
13
A6
8
B6
A7
12
9
GND
B7
11
10
PIN NAMES
Pins
OE
T/R
A0–A7
B0–B7
REV 0
MC74LCX2245
LOW–VOLTAGE CMOS
OCTAL TRANSCEIVER
Function
Output Enable Input
Transmit/Receive Input
Side A 3–State Inputs or 3–State
Outputs
Side B 3–State Inputs or 3–State
Outputs
20–LEAD PLASTIC SOIC EIAJ
20–LEAD PLASTIC TSSOP
20–LEAD PLASTIC SOIC
20–LEADPLASTIC SSOP
CASE 751D–04
CASE 940C–03
CASE 948E–02
CASE 967–01
DW SUFFIX
SD SUFFIX
DT SUFFIX
M SUFFIX

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MC74LCX2245 Summary of contents

Page 1

... TTL compatible outputs offer improved switching noise performance specification of 5.5V allows MC74LCX2245 inputs to 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; ...

Page 2

... MC74LCX2245 INPUTS OE T High Voltage Level Low Voltage Level High Impedance State High or Low Voltage Level and Transitions are Acceptable; For I CC reasons, Do Not Float Inputs MOTOROLA ...

Page 3

... LOW State) (3–State) –40 Condition 2. 3.6V 2. 3.6V 2. 3.6V –100 2.7V –4mA 2.7V –8mA 3.0V –6mA 3.0V –12mA 3 MC74LCX2245 Condition Unit V V Output in 3–State V Note < GND < GND > ...

Page 4

... MC74LCX2245 DC ELECTRICAL CHARACTERISTICS Symbol Characteristic V OL LOW Level Output Voltage I I Input Leakage Current I OZ 3–State Output Current I OFF Power–Off Leakage Current I CC Quiescent Supply Current I CC Increase per Input AC CHARACTERISTICS (Note 3 2.5ns 50pF 500 ) ...

Page 5

... PZH t PHZ 1.5V t PZL t PLZ 1.5V WAVEFORM 2 – OUTPUT ENABLE AND DISABLE TIMES 2.5ns, 10 1MHz 500ns Figure 3. AC Waveforms V CC DUT TEST Figure 4. Test Circuit 5 MC74LCX2245 Typical Unit 2. 2. – 0. ...

Page 6

... MC74LCX2245 –A – –B – 0.010 (0.25 SEATING G K PLANE 0.13 (0.005) 0.10 (0.004) M MOTOROLA OUTLINE DIMENSIONS DW SUFFIX PLASTIC SOIC PACKAGE CASE 751D–04 ISSUE 0.010 (0.25 –T M – ...

Page 7

... DETAIL E H DETAIL E 7 MC74LCX2245 NOTES: 13 DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 14 CONTROLLING DIMENSION: MILLIMETER. 15 DIMENSION A DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH OR GATE BURRS SHALL NOT EXCEED 0.15 (0.006) PER SIDE. 16 DIMENSION B DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSION ...

Page 8

... JAPAN: Nippon Motorola Ltd.; Tatsumi–SPD–JLDC, 6F Seibu–Butsuryu–Center, 3–14–2 Tatsumi Koto–Ku, Tokyo 135, Japan. 81–3–3521–8315 ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; 8B Tai Ping Industrial Park, 51 Ting Kok Road, Tai Po, N.T., Hong Kong. 852–26629298 8 MC74LCX2245/D LCX DATA BR1339 — REV 3 ...

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