SGS Thomson Microelectronics 74VHCT14A Datasheet



■ HIGHSPEED:t

■

LOW POWER DISSIPATION:
I

=2 µA (MAX.)at TA=25oC

CC

■

TYPICALHYSTERESIS:0.7Vat VCC= 4.5V

■ POWERDOWNPROTECTIONON INPUTS&

=4ns (TYP.)atVCC=5V

PD

OUTPUTS

■

SYMMETRICALOUTPUTIMPEDANCE:
|I

|=IOL=8 mA(MIN)

OH

■ BALANCEDPROPAGATIONDELAYS:

t

≅ t

PLH

PHL

■ OPERATINGVOLTAGERANGE:

(OPR)= 4.5Vto 5.5V

V

CC

■ PINANDFUNCTIONCOMPATIBLEWITH

74SERIES14

■ IMPROVEDLATCH-UPIMMUNITY

■ LOWNOISE:V

= 0.8V(Max.)

OLP

DESCRIPTION

The 74VHCT14A is an advanced high-speed
CMOS HEX SCHMITT INVERTER fabricated
with sub-micron silicon gate and double-layer
metalwiring C

2

MOStechnology.

The internal circuit is composed of 3 stages
including buffer output, which enable high noise
immunityand stableoutput.

74VHCT14A

HEX SCHMITT INVERTER

PRELIMINARY DATA

M

(Micro Package)

(TSSOPPackage)

ORDER CODES :

74VHCT14AM 74VHCT14AT

Power down protection is provided on all inputs
and outputs and 0 to 7V can be accepted on
inputs with no regard to the supply voltage. This
devicecan be used to interface 5V to 3V.

Pin configuration and function are the same as
those of the VHC04 but the VHC14 has
hysteresis.

This together with its schmitt trigger function
allows it to be used on line receivers with slow
rise/fallinput signals.

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

T

PIN CONNECTION AND IEC LOGICSYMBOLS

August 1999

1/7

74VHCT14A

INPUT EQUIVALENTCIRCUIT

PIN DESCRIPTION

PI N No SYMB OL NAME AND F U NCTIO N

1, 3, 5, 9,

1A to 6A Data Inputs

11, 13

2, 4, 6, 8,

1Y to 6Y Data Outputs

10, 12

7 GND Ground (0V)

14 V

CC

Positive Supply Voltage

TRUTH TABLE

AY

LH

HL

ABSOLUTE MAXIMUM RATINGS

Symb o l Para met er Value U n i t

V

V
V
V

I

I

OK

I

or I

I

CC

T

T

AbsoluteMaximumRatingsarethosevaluesbeyondwhichdamageto thedevicemayoccur.Functionaloperationunderthesecondition isnotimplied.

=0V

1)V

CC

2)HighorLowState

Supply Voltage -0.5 to +7.0 V

CC

DC Input Voltage -0.5 to +7.0 V

I

DC Output Voltage (see note 1) -0.5 to +7.0 V

O

DC Output Voltage (see note 2) -0.5 to VCC+ 0.5 V

O

DC Input Diode Current - 20 mA

IK

DC Output Diode Current ± 20 mA
DC Output Current ± 25 mA

O

DC VCCor Ground Current ± 50 mA

GND

Storage Temperature -65 to +150

stg

Lead Temperature (10 sec) 300

L

o

C

o

C

RECOMMENDED OPERATINGCONDITIONS

Symb o l Para met er Value Unit

V

V
V
V

T

1)VCC=0V

2)HighorLowState

2/7

Supply Voltage 4.5 to 5.5 V

CC

Input Voltage 0 to 5.5 V

I

Output Voltage (see note 1) 0 to 5.5 V

O

Output Voltage (see note 2) 0 to V

O

Operating Temperature -40 to +85

op

CC

V

o

C

74VHCT14A

DC SPECIFICATIONS

Symb o l Para met er Test Con dit io ns Val u e Uni t

T

=25oC -40 to 85oC

A

1.35 1.5 mA

µ

V

V

V

I

∆I

I

OPD

V

CC

(V)

High Level Threshold

t+

Voltage
Low Level Threshold

V

t-

Voltage
Hysteresis Voltage 4.5 0.4 1.4 0.4 1.4

V

h

4.5 2.0 2.0

5.5 2.0 2.0

4.5 0.6 0.6

5.5 0.6 0.6

Min. Typ. Max. Min. Max.

5.5 0.4 1.5 0.4 1.5

High Level Output

OH

Voltage
Low Level Output

OL

Voltage
Input Leakage Current 0 to 5.5 VI= 5.5V or GND ±0.1 ±1.0 µA

I

I

Quiescent Supply

CC

4.5 IO=-50µA 4.4 4.5 4.4

4.5 I

=-8 mA 3.94 3.8

O

4.5 IO=50 µ A 0.0 0.1 0.1

4.5 I

=8 mA 0.36 0.44

O

5.5 VI=VCCorGND 2 20 µA

Current
Additional Worst Case

CC

Supply Current

5.5 One Input at 3.4V,
other input at V

CC

or

GND

Output Leakage

0V

= 5.5V 0.5 5.0

OUT

Current

V

V

V

V

V

A

AC ELECTRICAL CHARACTERISTICS (Input tr=tf=3 ns)

Symbol Parameter Test Condition Value Unit

t

Propagation Delay

PLH

t

Time

PHL

(*)Voltagerange is5V ± 0.5V

V

(*)

CC

(V)

C

(pF)

L

5.0 15 4.0 7.0 1.0 8.0

5.0

50

T

=25oC -40 to 85oC

A

Min. Typ. Max. Min. Max.

5.5 8.0 1.0 9.0

ns

CAPACITIVE CHARACTERISTICS

Symb o l Para met er Test Con dit io ns Val u e Uni t

=25oC -40 to 85oC

T

A

Min. Typ. Max. Min. Max.

Input Capacitance 4 10 10

C

IN

Power Dissipation

C

PD

12 pF

Capacitance (note 1)

1)CPDisdefined asthevalue oftheIC’sinternal equivalentcapacitance whichiscalculated fromtheoperating currentconsumption without load.(Referto
TestCircuit).Average operatingcurrent canbeobtainedbythefollowingequation.I

(opr)= CPD• VCC• fIN+ICC/6(perGate)

CC

pF

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