ST 74LCX08 User Manual

74LCX08

Low voltage CMOS QUAD 2-input AND gate with 5V tolerant inputs

Features

■5V tolerant inputs

■High speed:

–tPD = 4.1ns (Max) at VCC = 3V

■Power down protection on inputs and outputs

■Symmetrical output impedance:

–|IOH| = IOL = 24mA (Min) at VCC = 3V

■PCI bus levels guaranteed at 24mA

■Balanced propagation delays:

–tPLH tPHL

■Operating voltage range:

–VCC (Opr) = 2.0V to 3.6V

■Pin and function compatible with 74 series 08

■Latch-up performance exceeds 500mA (JESD 17)

■ESD performance:

–HBM > 2000V

(MIL STD 883 method 3015); MM > 200V

SO-14	TSSOP14

Description

The 74LCX08 is a low voltage CMOS QUAD 2- input AND gate fabricated with sub-micron silicon gate and double-layer metal wiring C2MOS technology. It is ideal for low power and high speed 3.3V applications; it can be interfaced to 5V signal environment for inputs.

It has same speed performance at 3.3V than 5V AC/ACT family, combined with a lower power consumption.

All inputs and outputs are equipped with protection circuits against static discharge, giving them 2KV ESD immunity and transient excess voltage.

Order codes

Part number	Package	Packaging
74LCX08MTR	SO-14	Tape and reel
74LCX08TTR	TSSOP14	Tape and reel
July 2006	Rev 5	1/15
		www.st.com

Contents	74LCX08

Contents

1	Logic symbols and I/O equivalent circuit . . . . . . . . . . . . . . . . . . . . . . .		. 3
2	Pin settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		4
	2.1	Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4
	2.2	Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4
	2.3	Truth table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4
3	Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		5
	3.1	Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	5
4	Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		6
5	Test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		8
6	Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		8
7	Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		9
8	Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		14

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74LCX08	Logic symbols and I/O equivalent circuit

1 Logic symbols and I/O equivalent circuit

Figure 1. IEC logic symbols

Figure 2. Input and output equivalent circuit

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Pin settings	74LCX08

2 Pin settings

2.1Pin connection

Figure 3. Pin connection (top through view)

2.2	Pin description
	Table 1. Pin description
	Pin N°		Symbol	Name and function
	1, 4, 9, 12		1A to 4A	Data inputs
	2, 5, 10, 13		1B to 4B	Data inputs
	3, 6, 8, 11		1Y to 4Y	Data outputs
	7		GND	Ground (0V)
	14		VCC	Positive supply voltage

2.3	Truth table
	Table 2. Truth table
		Inputs		Output
	A		B	Y
	L		L	L
	L		H	L
	H		L	L
	H		H	H

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74LCX08	Maximum rating

3 Maximum rating

stressing the device above the rating listed in the “absolute maximum ratings” table may cause permanent damage to the device. these are stress ratings only and operation of the device at these or any other conditions above those indicated in the operating sections of this specification is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. refer also to the STMicroelectronics sure program and other relevant quality documents.

Table 3. Absolute maximum ratings

Symbol	Parameter	Value	Unit
VCC	Supply voltage	-0.5 to +7.0	V
VI	DC input voltage	-0.5 to +7.0	V
VO	DC output voltage (VCC = 0V)	-0.5 to +7.0	V
VO	DC output voltage (high or low state) (1)	-0.5 to VCC + 0.5	V
IIK	DC input diode current	-50	mA
IOK	DC output diode current (2)	-50	mA
IO	DC output current	± 50	mA
ICC	DC supply current per supply pin	± 100	mA
IGND	DC ground current per supply pin	± 100	mA
Tstg	Storage temperature	-65 to +150	°C
TL	Lead temperature (10 sec)	300	°C

1.IO absolute maximum rating must be observed

2.VO < GND

3.1Recommended operating conditions

Table 4. Recommended operating conditions

Symbol	Parameter	Value	Unit
VCC	Supply voltage (1)	2.0 to 3.6	V
VI	Input voltage	0 to 5.5	V
VO	Output voltage (VCC = 0V)	0 to 5.5	V
VO	Output voltage (high or low state)	0 to VCC	V
IOH, IOL	High or low level output current (VCC = 3.0 to 3.6V)	± 24	mA
IOH, IOL	High or low level output current (VCC = 2.7V)	± 12	mA
Top	Operating temperature	-40 to 85	°C
dt/dv	Input rise and fall time (2)	0 to 10	ns/V

1.Truth table guaranteed: 1.5V to 3.6V

2.VIN from 0.8V to 2V at VCC = 3.0V

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