MOTOROLA MC74LCX373TDWR2, MC74LCX373DTEL, MC74LCX373TDTR2, MC74LCX373TDT, MC74LCX373ML1 Datasheet

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MOTOROLA

SEMICONDUCTOR TECHNICAL DATA

Low-Voltage CMOS Octal

Transparent Latch

With 5V-Tolerant Inputs and Outputs

(3-State, Non-Inverting)

The MC74LCX373 is a high performance, non±inverting octal transparent latch 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 MC74LCX373 inputs to be safely driven from 5V devices.

The MC74LCX373 contains 8 D±type latches with 3±state outputs. When the Latch Enable (LE) input is HIGH, data on the Dn inputs enters the latches. In this condition, the latches are transparent, i.e., a latch output will change state each time its D input changes. When LE is LOW, the latches store the information that was present on the D inputs a setup time preceding the HIGH±to±LOW transition of LE. The 3±state standard outputs are controlled by the Output Enable (OE) input. When OE is LOW, the standard outputs are enabled. When OE is HIGH, the standard outputs are in the high impedance state, but this does not interfere with new data entering into the latches.

•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

MC74LCX373

LOW±VOLTAGE

CMOS OCTAL

TRANSPARENT LATCH

		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
	1
20		DT SUFFIX
20		PLASTIC TSSOP
		PLASTIC TSSOP
	1	CASE 948E±02
	1

Pinout: 20±Lead (Top View)

															PIN NAMES
	VCC			O7	D7	D6	O6	O5		D5	D4	O4		LE		Pins	Function
		20		19	18	17	16	15		14	13	12		11
		20		19	18	17	16	15		14	13	12		11		OE	Output Enable Input
																LE	Latch Enable Input
																D0±D7	Data Inputs
																O0±O7	3±State Latch Outputs
																O0±O7	3±State Latch Outputs



		1		2	3	4	5	6		7	8	9		10

			OE	O0	D0	D1	O1	O2		D2	D3	O3	GND
11/96
Motorola, Inc. 1996									1							REV 4

MC74LCX373

	LOGIC DIAGRAM
1
OE
11
LE
	nLE	2
3	Q	O0
D0	D
	nLE	5
4	Q	O1
D1	D
	nLE	6
7	Q	O2
D2	D
	nLE	9
8	Q	O3
D3	D
	nLE	12
13	Q	O4
D4	D
	nLE	15
14	nLE	O5
14	Q	O5
D5	D
	nLE	16
17	Q	O6
D6	D
	nLE	19
18	Q	O7
D7	D

	INPUTS		OUTPUTS

OE	LE	Dn	On	OPERATING MODE

L	H	H	H	Transparent (Latch Disabled); Read Latch
L	H	L	L	Transparent (Latch Disabled); Read Latch
L	H	L	L

L	L	h	H	Latched (Latch Enabled) Read Latch
L	L	l	L	Latched (Latch Enabled) Read Latch
L	L	l	L

L	L	X	NC	Hold; Read Latch

H	L	X	Z	Hold; Disabled Outputs

H	H	H	Z	Transparent (Latch Disabled); Disabled Outputs
H	H	L	Z	Transparent (Latch Disabled); Disabled Outputs
H	H	L	Z
H	L	h	Z	Latched (Latch Enabled); Disabled Outputs
H	L	l	Z	Latched (Latch Enabled); Disabled Outputs
H	L	l	Z

H = High Voltage Level; h = High Voltage Level One Setup Time Prior to the Latch Enable High±to±Low Transition; L = Low Voltage Level; l = Low Voltage Level One Setup Time Prior to the Latch Enable High±to±Low Transition; NC = No Change, State Prior to the Latch Enable High±to±Low Transition; X = High or Low Voltage Level or Transitions are Acceptable; Z = High Impedance State; For ICC Reasons DO NOT FLOAT Inputs

MOTOROLA

LCX DATA

BR1339 Ð REV 3

				MC74LCX373
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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