MOTOROLA MC74LCX244DTEL, MC74LCX244DTR2, MC74LCX244DT, MC74LCX244SDR2, MC74LCX244ML1 Datasheet

MOTOROLA

SEMICONDUCTOR TECHNICAL DATA

Low-Voltage CMOS Octal

Buffer

With 5V-Tolerant Inputs and Outputs

(3-State, Non-Inverting)

The MC74LCX244 is a high performance, non±inverting octal buffer 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 VI specification of 5.5V allows MC74LCX244 inputs to be safely driven from 5V devices. The MC74LCX244 is suitable for memory address driving and all TTL level bus oriented transceiver applications.

Current drive capability is 24mA at the outputs. The Output Enable (OE) input, when HIGH, disables the output by placing them in a HIGH Z condition.

•Designed for 2.7 to 3.6V VCC Operation

•5V Tolerant Ð Interface Capability With 5V TTL Logic

•Supports Live Insertion and Withdrawal

•IOFF Specification Guarantees High Impedance When VCC = 0V

•LVTTL Compatible

•LVCMOS Compatible

•24mA 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

•ESD Performance: Human Body Model >2000V; Machine Model >200V

Pinout: 20±Lead (Top View)

VCC			2OE		1O0		2D0		1O1		2D1		1O2		2D2		1O3		2D3
	20		19		18		17		16		15		14		13		12		11

MC74LCX244

LOW±VOLTAGE CMOS

OCTAL BUFFER

		DW SUFFIX
20		PLASTIC SOIC
		CASE 751D±04
	1
		M SUFFIX
20		PLASTIC SOIC EIAJ
		CASE 967±01
	1
		SD SUFFIX
20		PLASTIC SSOP
	1	CASE 940C±03
20		DT SUFFIX
		PLASTIC TSSOP
	1	CASE 948E±02

PIN NAMES

Pins

Function

nOE

Output Enable Inputs

1

2

3

4

5

6

7

8

9

10

1Dn, 2Dn

Data Inputs

1D0

2O0

1D1

2O1

1D2

2O2

1D3

2O3

GND

1On, 2On

3±State Outputs

1OE

9/95

Motorola, Inc. 1996

1

REV 3

MC74LCX244

LOGIC DIAGRAM

1

1OE
2							18
1D0								1O0
4							16
1D1								1O1
6							14
1D2								1O2
8							12
1D3								1O3

19

2OE
17							3
2D0								2O0
15							5
2D1								2O1
13							7
2D2								2O2
11							9
2D3								2O3

		INPUTS			OUTPUTS
1OE				1Dn
2OE				2Dn	1On, 2On
	L			L	L
	L			H	H
	H			X	Z

H = High Voltage Level; L = Low Voltage Level; Z = High

Impedance State; X = High or Low Voltage Level and Transitions

Are Acceptable, for ICC reasons, DO NOT FLOAT Inputs

MOTOROLA	2	LCX DATA
		BR1339 Ð REV 3

				MC74LCX244
ABSOLUTE MAXIMUM RATINGS*
Symbol	Parameter	Value	Condition		Unit
VCC	DC Supply Voltage	±0.5 to +7.0			V
VI	DC Input Voltage	±0.5 ≤ VI ≤ +7.0			V
VO	DC Output Voltage	±0.5 ≤ VO ≤ +7.0	Output in 3±State		V
		±0.5 ≤ VO ≤ VCC + 0.5	Note 1.		V
IIK	DC Input Diode Current	±50	VI < GND		mA
IOK	DC Output Diode Current	±50	VO < GND		mA
		+50	VO > VCC		mA
IO	DC Output Source/Sink Current	±50			mA
ICC	DC Supply Current Per Supply Pin	±100			mA
IGND	DC Ground Current Per Ground Pin	±100			mA
TSTG	Storage Temperature Range	±65 to +150			°C

*Absolute maximum continuous ratings are those values beyond which damage to the device may occur. Exposure to these conditions or conditions beyond those indicated may adversely affect device reliability. Functional operation under absolute±maximum±rated conditions is not implied.

1. Output in HIGH or LOW State. IO absolute maximum rating must be observed.

RECOMMENDED OPERATING CONDITIONS

Symbol	Parameter		Min	Typ	Max	Unit
VCC	Supply Voltage	Operating	2.0	3.3	3.6	V
		Data Retention Only	1.5	3.3	3.6
VI	Input Voltage		0		5.5	V
VO	Output Voltage	(HIGH or LOW State)	0		VCC	V
		(3±State)	0		5.5
IOH	HIGH Level Output Current, VCC = 3.0V ± 3.6V				±24	mA
IOL	LOW Level Output Current, VCC = 3.0V ± 3.6V				24	mA
IOH	HIGH Level Output Current, VCC = 2.7V ± 3.0V				±12	mA
IOL	LOW Level Output Current, VCC = 2.7V ± 3.0V				12	mA
TA	Operating Free±Air Temperature		±40		+85	°C
t/ V	Input Transition Rise or Fall Rate, VIN from 0.8V to 2.0V,		0		10	ns/V
	VCC = 3.0V

DC ELECTRICAL CHARACTERISTICS

			TA = ±40°C to +85°C
Symbol	Characteristic	Condition	Min	Max	Unit
VIH	HIGH Level Input Voltage (Note 2.)	2.7V ≤ VCC ≤ 3.6V	2.0		V
VIL	LOW Level Input Voltage (Note 2.)	2.7V ≤ VCC ≤ 3.6V		0.8	V
VOH	HIGH Level Output Voltage	2.7V ≤ VCC ≤ 3.6V; IOH = ±100μA	VCC ± 0.2		V
		VCC = 2.7V; IOH = ±12mA	2.2
		VCC = 3.0V; IOH = ±18mA	2.4
		VCC = 3.0V; IOH = ±24mA	2.2
VOL	LOW Level Output Voltage	2.7V ≤ VCC ≤ 3.6V; IOL = 100μA		0.2	V
		VCC = 2.7V; IOL= 12mA		0.4
		VCC = 3.0V; IOL = 16mA		0.4
		VCC = 3.0V; IOL = 24mA		0.55

2. These values of VI are used to test DC electrical characteristics only.

LCX DATA	3	MOTOROLA
BR1339 Ð REV 3