SGS Thomson Microelectronics 74VHCT273A Datasheet



OCTAL D-TYPE FLIP FLOP WITH CLEAR

■ HIGHSPEED:

f

=170MHz(TYP.)atVCC=5V

MAX

■ LOWPOWERDISSIPATION:

=4 µA (MAX.)at TA=25oC

I

CC

■ COMPATIBLEWITHTTL OUTPUTS:

V

=2V(MIN),VIL=0.8V(MAX)

IH

■ POWERDOWNPROTECTIONON INPUTS&

OUTPUTS

■ SYMMETRICALOUTPUTIMPEDANCE:

|I

|=IOL=8 mA(MIN)

OH

■ BALANCEDPROPAGATIONDELAYS:

t

≅ t

PLH

PHL

■ OPERATINGVOLTAGERANGE:

V

(OPR)= 4.5Vto 5.5V

CC

■ PINANDFUNCTION COMPATIBLEWITH

74SERIES273

■ IMPROVEDLATCH-UPIMMUNITY

■ LOWNOISE:V

DESCRIPTION

The 74VHCT273A is an advanced high-speed
CMOS OCTAL D-TYPE FLIP FLOP WITH
CLEAR fabricated with sub-micron silicon gate
and double-layer metal wiring C

= 0.9V(Max.)

OLP

2

MOS

74VHCT273A

M

(Micro Package)

(TSSOPPackage)

ORDERCODES :

74VHCT273AM 74VHCT273AT

technology.
Information signals applied to D inputs are

transfered to the Q outputson the positive going
edgeof the clockpulse.

Whenthe CLEAR input is held low, the Q outputs
are held low independentlyof theother inputs.

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 usedto interface5V to 3V.

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

November 1999

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74VHCT273A

INPUT EQUIVALENTCIRCUIT

TRUTH TABLE

INPUTS OUTPUTS FUNCTION

CLE AR D CLOCK Q

L X X L CLEAR
HL L
HH H
HX Q

X:Don’tCare

PIN DESCRIPTION

PI N No SYM BO L NAM E AND F U NCTIO N

1 CLEAR Asyncronous Master

Reset (Active LOW)

2, 5, 6, 9,

12, 15,16,

19

3, 4, 7, 8,

13, 14,17,

18
11 CLOCK Clock Input

10 GND Ground (0V)
20 V

n

Q0 to Q7 Flip-Flop Outputs

D0 to D7 Data Inputs

(LOW-to-HIGH, Edge­Triggered)

CC

Positive Supply Voltage

NO CHANGE

LOGICDIAGRAM

Thislogic diagram has not be used to esimate propagation delays

2/9

74VHCT273A

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

AbsoluteMaximumRatingsarethosevaluesbeyond whichdamage tothedevicemayoccur.Functionaloperation underthese conditionisnotimplied.

1)V

=0

CC

2)HighorLowState

RECOMMENDED OPERATING CONDITIONS

Symb o l Para met er Value Unit

V

V
V
V

T

dt/dv

1)VCC=0

2)HighorLowState
from0.8Vto 2V

3)V

IN

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
DC Output Current

O

DC VCCor Ground Current ± 50 mA

GND

Storage Temperature -65 to +150

stg

Lead Temperature (10 sec) 300

L

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

Input Rise and Fall Time (see note 3) (V

=5.0±0.5V)

CC

20 mA

±

25 mA

±

CC

0 to20 ns/V

o

C

o

C

V

o

C

DC SPECIFICATIONS

Symb o l Para met er Test Con di ti o ns Val u e Uni t

T

=25oC -40 to 85oC

A

1.35 1.5 mA

µ

V

V

V

V

I

∆I

I

OPD

V

CC

High Level Input

IH

(V)

4.5 to 5.5 2 2 V

Min. Typ. Max. Min. Max.

Voltage
Low Level Input

IL

4.5 to 5.5 0.8 0.8 V

Voltage
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=-50 µA 4.4 4.5 4.4

4.5 I

=-8 mA 3.94 3.8

O

4.5 IO=50 µA 0.0 0.1 0.1

4.5 I

=8 mA 0.36 0.44

O

5.5 VI=VCCorGND 4 40

Current
Additional Worst Case

CC

Supply Current

5.5 One Input at 3.4V,
other inputat V

CC

or

GND

Output Leakage

0V

= 5.5V 0.5 5.0 µA

OUT

Current

V

V

A

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