SGS Thomson Microelectronics 74AC273 Datasheet



OCTAL D-TYPE FLIP FLOP WITH CLEAR

■ HIGHSPEED:

=190MHz(TYP.)atVCC=5V

f

MAX

■ LOWPOWERDISSIPATION:

I

=8µA (MAX.)at TA=25oC

CC

■ HIGHNOISEIMMUNITY:

V

NIH=VNIL

■

50ΩTRANSMISSIONLINEDRIVING
CAPABILITY

■ SYMMETRICALOUTPUTIMPEDANCE:

|I

|=IOL=24mA(MIN)

OH

■ BALANCEDPROPAGATIONDELAYS:

≅

t

PLH

■ OPERATINGVOLTAGERANGE:

V

(OPR)= 2Vto 6V

CC

■ PINANDFUNCTION COMPATIBLEWITH

74SERIES273

■

IMPROVEDLATCH-UPIMMUNITY

DESCRIPTION

The AC273 is a high-speed CMOS OCTAL
D-TYPE FLIP FLOP WITH CLEAR fabricated
with sub-micron silicon gate and double-layer
metal wiring C
power applications mantaining high speed

=28%VCC(MIN.)

t

PHL

2

MOS technology.It isideal for low

74AC273

PRELIMINARY DATA

B

(PlasticPackage)

(Micro Package)

ORDERCODES :

74AC273B 74AC273M

operation similar to equivalent Bipolar Schottky
TTL.

Information signals applied to D inputs are
transfered to the Q output on the positive going
edgeof the clock pulse.

Whenthe CLEAR input is held low, the Q outputs
are held low independentelyof the otherinputs .

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

M

PIN CONNECTION AND IEC LOGIC SYMBOLS

November 1998

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74AC273

INPUT AND OUTPUTEQUIVALENTCIRCUIT

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 NCTI O 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 Outpus

D0 to D7 Data Inputs

(LOW-to-HIGH, Edge­Triggered)

CC

Positive Supply Voltage

NO CHANGE

LOGICDIAGRAMS

Thislogic diagram has not be used to esimate propagation delays

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74AC273

ABSOLUTE MAXIMUM RATINGS

Symb o l Para met er Val u e Uni t

V

V

V

I

I

OK

I

or I

I

CC

T

T

AbsoluteMaximumRatingsarethosevaluesbeyond whichdamage tothedevicemayoccur.Functionaloperationunderthese conditionisnotimplied.

RECOMMENDED OPERATINGCONDITIONS

Symb o l Para met er Value Un it

V

V

V

T

dt/dv Input Rise and Fall Time V

1)VINfrom30%to70%ofV

Supply Voltage -0.5 to +7 V

CC

DC Input Voltage -0.5 to VCC+ 0.5 V

I

DC Output Voltage -0.5 to VCC+ 0.5 V

O

DC Input Diode Current ± 20 mA

IK

DC Output Diode Current ± 20 mA
DC Output Current

O

DC VCCor Ground Current

GND

Storage Temperature -65 to +150

stg

Lead Temperature (10 sec) 300

L

Supply Voltage 2 to 6 V

CC

Input Voltage 0 to V

I

Output Voltage 0 to V

O

Operating Temperature: -40 to +85

op

= 3.0, 4.5 or 5.5 V(note 1) 8 ns/V

CC

CC

50 mA

±

400 mA

±

CC
CC

o

C

o

C

V
V

o

C

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