SGS Thomson Microelectronics 74VHCT374A Datasheet



WITH 3 STATE OUTPUT NON INVERTING

■ HIGHSPEED:

■ f

■ LOW POWERDISSIPAT ION:

■ COMPATIBLEWITHTTLOUTPUTS:

■ POWERDOWN PROTECTIONON INPUTS&

■ SYMMETRICALOUTPUTIMPEDANCE:

■ BALANCEDPROPAGATIONDELAYS:

■ OPERATINGVOLTAGERANGE:

■ PINANDFUNCTIONCOMPATIBLEWITH

■ IMPROVEDLATCH-UPIMMUNITY

■ LOWNOISEV

DESCRIPTION

The 74VHCT374A is an advanced high-speed
CMOS OCTAL D-TYPE FLIP FLOP with 3
STATE OUTPUT NON INVERTING fabricated
with sub-micron silicon gate and double-layer
metalwiring C

This 8 bit D-Type flip-flop is controlled by a clock
input (CK) and an output enable input (OE).

On the positive transition of the clock, the Q
outputs will be set to the logic state that were

=180MHz(TYP.)atVCC=5V

MAX

=4 µA (MAX.) at TA=25oC

I

CC

V

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

IH

OUTPUTS
|I

|=IOL=8mA(MIN)

OH

t

≅ t

PLH

PHL

V

(OPR)= 4.5Vto5.5V

CC

74SERIES374

=0.9V(Max.)

OLP

2

MOStechnology.

74VHCT374A

OCTAL D-TYPE FLIP FLOP

SOP TSSOP

ORDER CODES

PACKAGE TUBE T & R

SOP 74VHCT374AM 74VHCT374AMTR

TSSOP 74VHCT374ATTR

setupat the D inputs.
While the (OE) input is low, the 8 outputs will be

in a normal logic state (high or low logic level)
and while high level the outputs will be in a high
impedancestate.

The output control does not affect the internal
operation of flip flops; that is, the old data can be
retained or the new data can be entered even
whilethe outputsare off.

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.

PIN CONNECTION AND IEC LOGICSYMBOLS

February 2000

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74VHCT374A

INPUT EQUIVALENTCIRCUIT PIN DESCRIPTION

PI N No SYMB OL NAME AND F U NCTIO N

1 OE 3 State Output Enable

2, 5, 6, 9,

12, 15, 16,

19

3, 4, 7, 8,

13, 14, 17,

18
11 CLOCK Clock Input (LOW to

10 GND Ground (0V)
20 V

TRUTH TABLE

INPUTS OUTPUTS

OE CK D Q

HXXZ

L X NO CHANGE
LLL
LHH

X:Don’tcare
Z:Highimpedance

Q0 to Q7 3 State Outputs

D0 to D7 Data Inputs

CC

Input (Active LOW)

HIGH, edge triggered)

Positive Supply Voltage

LOGICDIAGRAM

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74VHCT374A

ABSOLUTE MAXIMUM RATINGS

Symb o l Parameter Value U n i t

V

V
V
V

I

I

OK

I

or I

I

CC

T

T

AbsoluteMaximumRatingsarethosevaluesbeyondwhichdamagetothedevicemayoccur.Functionaloperationunderthesecondition isnotimplied.

1)Outputin OFFState

2)HighorLowState

RECOMMENDEDOPERATINGCONDITIONS

Symb o l Parameter Value Unit

V

V
V
V

T

dt/dv

1)Outputin OFFState

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 to 20 ns/V

o

C

o

C

V

o

C

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