Fairchild Semiconductor 74LCX14SJ, 74LCX14MX, 74LCX14MTCX, 74LCX14MTC, 74LCX14M Datasheet

March 1995
Revised March 1999

74LCX14 Low Voltage Hex Inverter with 5V Tolerant Schmitt Trigger Inputs

© 1999 Fairchild Semiconductor Corporation DS012412.prf www.fairchildsemi.com

74LCX14
Low Voltage Hex Inverter

with 5V Tolerant Schmitt Trigger Inputs

General Description

The LCX14 contains six inverter gat es each with a Schmitt
trigger input. They are capable of transforming slowly
changing input signals in to sharply defined, jitte r-free out­put signals. In additio n, they have a greater no ise margin
than conventional inverters.

The LCX14 has hysteresis b etween th e positi ve-go ing and
negative-going input thresholds (typically 1.0V) which is
determined internall y by transistor ratios an d is essentially
insensitive to temperature and supply voltage variations.

The inputs tolerate voltages up to 7V allowing the interface
of 5V, 3V and 2.5V systems.

The 74LCX14 is fabricated with advanced CMO S technol­ogy to achieve high speed operation while maintaining
CMOS low power dissipation.

Features

■ 5V tolerant inputs

■ 2.3V–3.6V V

CC

specifications provided

■ 6.5 ns t

PD

max (V

CC

= 3.3V), 10 µA ICC max

■ Power down high impedance inputs and outputs

■ ±24 mA output drive (V

CC

= 3.0V)

■ Implements patented noise/EMI reduction circuitry

■ Latch-up performance exceeds 500 mA

■ ESD performance:

Machine model > 2000V

Human model > 200V

Ordering Code:

Devices also availab le in Tape and Reel. Specify by appending th e s uffix let t er “X” to the ordering code.

Logic Symbol

IEEE/IEC

Pin Descriptions

Connection Diagram

Truth Table

Order Number Package Number Package Description

74LCX14M M14A 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150” Narrow
74LCX14SJ M14D 14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74LCX14MTC MTC14 14-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide

Pin Names Description

I

n

Inputs

O

n

Outputs

Input Output

AO

L H
H L

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74LCX14

Absolute Maximum Ratings(Note 1)

Recommended Operating Conditions (Note 3)

Note 1: The Absolute Maximum Ratings are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated

at these limits. Th e parametric values def ined in the Electrical Cha racteristic s tables are not guaran teed at the A bsolute Ma ximum Rating s. The “Rec om­mended Operat ing Conditions” table will define the conditions fo r ac t ual device operation.

Note 2: I

O

Absolute Maximum Rating must be observed.

Note 3: Unused inputs must be held HIGH or LOW. They may not float.

DC Electrical Characteristics

Symbol Parameter Value Conditions Units

V

CC

Supply Voltage −0.5 to +7.0 V

V

I

DC Input Voltage −0.5 to +7.0 V

V

O

DC Output Voltage −0.5 to VCC + 0.5 Output in HIGH or LOW State (Note 2) V

I

IK

DC Input Diode Current −50 VI < GND mA

I

OK

DC Output Diode Current −50 VO < GND

mA

+50 V

O

> V

CC

I

O

DC Output Source/Sink Current ±50 mA

I

CC

DC Supply Current per Supply Pin ±100 mA

I

GND

DC Ground Cu rrent per Ground Pin ±100 mA

T

STG

Storage Temperature −65 to +150 °C

Symbol Parameter Min Max Units

V

CC

Supply Voltage Operating 2 .0 3.6

V

Data Retention 1.5 3.6

V

I

Input Voltage 05.5V

V

O

Output Voltage HIGH or LOW State 0 V

CC

V

I

OH/IOL

Output Current VCC = 3.0V − 3.6V ±24

mAV

CC

= 2.7V − 3.0V ±12

V

CC

= 2.3V − 2.7V ±8

Symbol Parameter Conditions

V

CC

TA = −40°C to +85°C

Units

(V) Min Max

V

t+

Positive Input Threshold 2.5 0.9 1.7

V

3.0 1.2 2.2

V

t−

Negative Input Threshold 2.5 0.4 1.1

V

3.0 0.6 1.5

V

H

Hysteresis 2.5 0.3 1.0

V

3.0 0.4 1.2

V

OH

HIGH Level Output Voltage IOH = −100µA2.3 − 3.6 VCC - 0.2

V

IOH = -8 mA 2.3 1.8
IOH = −12 mA 2.7 2.2
IOH = −18 mA 3.0 2.4
IOH = −24 mA 3.0 2.2

V

OL

LOW Level Output Voltage IOL = 100µA2.3 − 3.6 0.2

V

IOL = 8mA 2.3 0.6
IOL = 12 mA 2.7 0.4
IOL = 16 mA 3.0 0.4
IOL = 24 mA 3.0 0.55

I

I

Input Leakage Current 0 ≤ VI ≤ 5.5V 2.3 − 3.6 ±5.0 µA

I

OFF

Power-Off Leakage Current VI or VO = 5.5V 0 10 µA

I

CC

Quiescent Supply Current VI = VCC or GND 2.3 − 3.6 10

µA

3.6V ≤ VI ≤ 5.5V 2.3 − 3.6 ±10

∆I

CC

Increase in ICC per Input VIH = VCC −0.6V 2.3 − 3.6 500 µA

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74LCX14

AC Electrical Characteristics

Note 4: Skew is def ined as the absolut e v alue of the difference between the actual propagation delay f or any two separate outputs of the same device. The

specification applies t o any outputs switching in th e s am e direction, either HIG H -t o-LOW (t

OSHL

) or LOW-to-HIGH (t

OSLH

).

Dynamic Switching Characteristics

Capacitance

Symbol Parameter

TA = −40°C to +85°C, RL = 500 Ω

Units

VCC = 3.3V ± 0.3V VCC = 2.7V VCC = 2.5V ± 0.2V

CL= 50 pF CL = 50 pF CL = 30 pF

Min Max Min Max Min Max

t

PHL

Propagation Delay Time 1.5 6.5 1.5 7.5 1.5 7.8

ns

t

PLH

1.5 6.5 1.5 7.5 1.5 7.8

t

OSHL

Output to Output Skew 1.0

ns

t

OSLH

(Note 4) 1.0

Symbol Parameter Conditions

V

CC

(V)

TA = 25°C

Units

Typical

V

OLP

Quiet Output Dynamic Peak V

OL

CL = 50 pF, VIH =3.3V, VIL = 0V 3.3 0.8

V

CL = 30 pF, VIH = 2.5V, VIL = 0V 2.5 0.6

V

OLV

Quiet Output Dynamic Valley V

OL

CL = 50 pF, VIH = 3.3V, VIL = 0V 3.3 −0.8

V

CL = 30 pF, VIH =2.5V, VIL = 0V 2.5 −0.6

Symbol Parameter Conditions Typical Units

C

IN

Input Capacitance VCC = Open, VI = 0V or V

CC

7pF

C

OUT

Output Capacitance VCC = 3.3V, VI = 0V or V

CC

8pF

C

PD

Power Dissipation Capacitance VCC = 3.3V, VI = 0V or VCC, f = 10 MHz 25 pF