ST 74LCX08 User Manual

Low voltage CMOS QUAD 2-input AND gate

Features

■ 5V tolerant inputs

■ High speed:

–t

= 4.1ns (Max) at V

PD

■ Power down protection on inputs and outputs

■ Symmetrical output impedance:

–|I

■ PCI bus levels guaranteed at 24mA

■ Balanced propagation delays:

–t

■

Operating voltage range:
–V

■ Pin and function compatible with

| = IOL = 24mA (Min) at VCC = 3V

OH

≅ t

PLH

PHL

(Opr) = 2.0V to 3.6V

CC

74 series 08

■ Latch-up performance exceeds

500mA (JESD 17)

■ ESD performance:

– HBM > 2000V

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

CC

= 3V

74LCX08

with 5V tolerant inputs

SO-14 TSSOP14

Description

The 74LCX08 is a low voltage CMOS QUAD 2­input AND gate fabricated with sub-micron silicon
gate and double-layer metal wiring C
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.

2

MOS

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

15

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

2/15

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

3/15

Pin settings 74LCX08

2 Pin settings

2.1 Pin 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 V

2.3 Truth table

Table 2. Truth table

ABY

LLL

LHL

HLL

HHH

CC

Inputs Output

Positive supply voltage

4/15

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

V

I

I

I

GND

T

1. IO absolute maximum rating must be observed

2. VO < GND

Supply voltage -0.5 to +7.0 V

CC

V

DC input voltage -0.5 to +7.0 V

I

DC output voltage (VCC = 0V)

V

O

V

DC output voltage (high or low state)

O

I

DC input diode current -50 mA

IK

DC output diode current

OK

I

DC output current ± 50 mA

O

DC supply current per supply pin ± 100 mA

CC

(2)

(1)

-0.5 to +7.0 V

-0.5 to VCC + 0.5

-50 mA

DC ground current per supply pin ± 100 mA

Storage temperature -65 to +150 °C

stg

T

Lead temperature (10 sec) 300 °C

L

V

3.1 Recommended operating conditions

Table 4. Recommended operating conditions

Symbol Parameter Value Unit

V

V

V

V

Supply voltage

CC

Input voltage 0 to 5.5 V

I

Output voltage (VCC = 0V)

O

Output voltage (high or low state)

O

IOH, IOLHigh or low level output current (VCC = 3.0 to 3.6V)

I

, IOLHigh or low level output current (VCC = 2.7V)

OH

T

dt/dv

1. Truth table guaranteed: 1.5V to 3.6V

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

Operating temperature -40 to 85 °C

op

Input rise and fall time

(1)

(2)

5/15

2.0 to 3.6 V

0 to 5.5 V

0 to V

CC

± 24 mA

± 12 mA

0 to 10 ns/V

V