MOTOROLA MC74LCX245M, MC74LCX245DTR2, MC74LCX245DWR2, MC74LCX245DTEL, MC74LCX245SD Datasheet

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MOTOROLA

SEMICONDUCTOR TECHNICAL DATA

Low-Voltage CMOS	Octal		MC74LCX245
Transceiver			MC74LCX245
Transceiver
With 5V-Tolerant Inputs	and Outputs
(3-State, Non-Inverting)
The MC74LCX245 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
performance. A VI specification of 5.5V allows MC74LCX245 inputs to be			OCTAL TRANSCEIVER
safely driven from 5V devices. The MC74LCX245 is suitable for memory
address driving and all TTL level bus oriented transceiver applications.
Current drive capability is 24mA 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			DW SUFFIX
ports by placing them in a HIGH Z condition.		20	PLASTIC SOIC
			CASE 751D±04
			1

•Designed for 2.7 to 3.6V VCC Operation

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

• Supports Live Insertion and Withdrawal		M SUFFIX
• IOFF Specification Guarantees High Impedance When VCC = 0V	20	PLASTIC SOIC EIAJ
		CASE 967±01
• LVTTL Compatible		1
• LVTTL Compatible

•LVCMOS Compatible

•24mA Balanced Output Sink and Source Capability

• Near Zero Static Supply Current in All Three Logic States (10μA)		SD SUFFIX
	20	PLASTIC SSOP
Substantially Reduces System Power Requirements	20	PLASTIC SSOP
Substantially Reduces System Power Requirements		CASE 940C±03
• Latchup Performance Exceeds 500mA		1
• Latchup Performance Exceeds 500mA
• ESD Performance: Human Body Model >2000V; Machine Model >200V

DT SUFFIX

20	PLASTIC TSSOP

1	CASE 948E±02

Pinout: 20±Lead (Top View)

PIN NAMES

VCC

Pins

Function

Output Enable Input

T/R

Transmit/Receive Input

A0±A7

Side A 3±State Inputs or 3±State

Outputs

B0±B7

Side B 3±State Inputs or 3±State

Outputs

GND

T/R

9/95

Motorola, Inc. 1996

REV 3

MC74LCX245

LOGIC DIAGRAM

		OE 19
		T/R 1
		2
		A0
		18
		B0
		3
		A1
		17
		B1
		4
		A2
		16
		B2
		5
		A3
		15
		B3
		6
		A4
		14
		B4
		7
		A5
		13
		B5
		8
		A6
		12
		B6
		9
		A7
		11
		B7
	INPUTS	OPERATING MODE
OE	T/R	OPERATING MODE
OE	T/R	Non±Inverting
L	L	B Data to A Bus
L	H	A Data to B Bus
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

				MC74LCX245
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

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