Fairchild Semiconductor 74VHCT14ASJX, 74VHCT14ASJ, 74VHCT14AN, 74VHCT14AMX, 74VHCT14AMTCX Datasheet

December 1998
Revised March 1999

74VHCT14A Hex Schmitt Inverter

© 1999 Fairchild Semiconductor Corporation DS500147.prf www.fairchildsemi.com

74VHCT14A
Hex Schmi t t Inverter

General Description

The VHCT14A is an advanced high speed CMOS Hex
Schmitt Inverter fabricated with silicon gate CMOS technol­ogy. The VHCT14A contains six independent inverters
which are capable of transform ing slowly changing input
signals into sharply defined, jitter-free output signals.

Protection circuits en sure that 0V to 7V c an be app lied to
the input pins without reg ard to the supply voltage an d to
the output pins with V

CC

= 0V. These circuits prevent

device destruction due to m ismatched supply and input/
output voltages. This devic e can be use d to inte rfa ce 3V to
5V systems and two supply systems such as battery
backup.

Features

■ High spee d: tPD = 5.0 ns (typ) at TA = 25°C

■ High noise immunity: V

IH

= 2.0V, VIL = 0.8V

■ Power down protection is provided on all inputs and out­puts

■ Low noise: V

OLP

= 1.0V (max)

■ Low power dissipation:

I

CC

= 2 µA (max) @ TA = 25°C

■ Pin and function compatible with 74HCT14

Ordering Code:

Surface mount pack ages are also available on Tape and Reel. Specif y by appending the suffix letter “X ” to th e ordering code.

Logic Symbol

Pin Descriptions

Connection Diagram

Truth Table

Order Number Package Number Package Description

74VHCT14AM M14A 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150” Narrow
74VHCT14ASJ M14D 14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74VHCT14AMTC MTC14 14-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
74VHCT14AN N14A 14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide

Pin Names Description

A

n

Inputs

O

n

Outputs

AO

LH
HL

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74VHCT14A

Absolute Maximum Ratings(Note 1) Recommended Operating

Conditions

(Note 5)

Note 1: Absolute Maximum Ratings are values beyond which the device
may be damaged or ha ve its useful li fe impaire d. The datab ook specifica­tions should be met, without exception, to ensure that the system design is
reliable over its p ower supp ly, temperature, and ou tput/input loading vari­ables. Fairchild does not recom mend operation outside data book specifica­tions.

Note 2: HIGH or LOW state. I

OUT

absolute maximum rating must be

observed.
Note 3: V

CC

= 0V.

Note 4: V

OUT

< GND, V

OUT

> VCC (Outputs Active)

Note 5: Unused inputs must be held HIGH or LOW. They may not float.

DC Electrical Characteristics

Noise Characteristics

Note 6: Paramete r guaranteed by design.

Supply Voltage (VCC) −0.5V to +7.0V
DC Input Voltage (V

IN

) −0.5V to +7.0V

DC Output Voltage (V

OUT

)

(Note 2) −0.5V to V

CC

+ 0.5V
(Note 3) −0.5V to 7.0V
Input Diode Current (I

IK

) −20 mA

Output Diode Current (I

OK

)

(Note 4) ±20 mA

DC Output Current (I

OUT

) ±25 mA

DC V

CC

/GND Current (ICC) ±50 mA

Storage Temperature (T

STG

) −65°C to +150°C

Lead Temperature (T

L

)

(Soldering, 10 seconds) 260°C

Supply Voltage (V

CC

) 4.5V to +5.5V

Input Voltage (V

IN

) 0V to +5.5V

Output Voltage (V

OUT

)

(Note 2) 0V to V

CC

(Note 3) 0V to 5.5V
Operating Temperature (T

OPR

) −40°C to +85°C

Symbol Parameter

V

CC

(V)

TA = 25°CT

A

= −40°C to +85°C

Units Conditions

Min Typ Max Min Max

V

P

Positive Threshold Voltage 4.5 1.9 1.9

V

5.5 2.1 2.1

V

N

Negative Threshold Voltage 4.5 0.5 0.5

V

5.5 0.6 0.6

V

H

Hysteresis Voltage 4.5 0.4 1.4 0.4 1.4

V

5.5 0.4 1.5 0.4 1.5

V

OH

HIGH Level Output Voltage

4.5

4.40 4.50 4.40 V VIN = VIL IOH = −50 µA

3.94 3.80 V IOH = −8 mA

V

OL

LOW Level Output Voltage

4.5

0.0 0.1 0.1 V VIN = VIH IOL = 50 µA

0.36 0.44 V IOL = 8 mA

I

IN

Input Leakage Current 0 − 5.5 ±0.1 ±1.0 µAVIN = 5.5V or GND

I

CC

Quiescent Supply Current 5.5 2.0 20.0 µAVIN = VCC or GND

I

CCT

Maximum ICC/Input

5.5 1.35 1.50 mA

VIN = 3.4V
Other Inputs = VCC or GND

I

OFF

Output Leakage Current 0.0 0.5 5.0 µAV

OUT

= 5.5V

(Power Down State)

Symbol Parameter

VCC

(V)

TA = 25°C

Units Conditions

Typ Limits

V

OLP

(Note 6)

Quiet Output Maximum Dynamic V

OL

5.0 0.8 1.0 V CL = 50 pF

V

OLV

(Note 6)

Quiet Output Minimum Dynamic V

OL

5.0 −0.8 1.0 V CL = 50 pF

V

IHD

(Note 6)

Minimum HIGH Level Dynamic Input Voltage

5.0 2.0 V CL = 50 pF

V

ILD

(Note 6)

Maximum LOW Level Dynamic Input Voltage

5.0 0.8 V CL = 50 pF