Datasheet 74VHCT374A Datasheet (SGS Thomson Microelectronics)



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

1/10

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

2/10

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

3/10

74VHCT374A

DC SPECIFICATIONS

Symb o l Para met er Test Conditi o ns Val u e Uni t

T

=25oC -40 to 85oC

A

±0.25 ±2.5 µA

1.35 1.5 mA

V

V

V

V

I

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
High Impedance

OZ

Output Leakage

4.5 IO=-50 µA 4.4 4.5 4.4

4.5 I

=-8 mA 3.94 3.8

O

4.5 IO=50µA 0.0 0.1 0.1

4.5 I

4.5 to 5.5 VI=VIHor V

=8 mA 0.36 0.44

O

IL

VO= 0V to 5.5V

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

I

I

Quiescent Supply

CC

5.5 VI=VCCorGND 4 40 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 µA

OUT

Current

V

V

AC ELECTRICAL CHARACTERISTICS

(Inputt

r=tf

=3 ns)

Symbol Parameter Test Conditi on Value Unit

t

Propagation Delay

PLH

Time CK to Q

t

PHL

Output EnableTime 5.0

t

PZL

t

PZH

t

Output Disable Time 5.0

PLZ

t

PHZ

t

Clock Pulse Width

w

V

(V)

5.0

5.0

5.0

5.0

CC

C

L

(pF)

(*)

15 5.6 9.4 1.0 10.5

(*)

50

(*)

15 RL=1K

(*)

50 7.1 11.2 1.0 12.5

(*)

(*)

50 RL=1K

Min. Typ. Max. Min. Max.

Ω

Ω

=25oC -40 to 85oC

T

A

6.4 10.4 1.0 11.5

6.2 10.2 1.0 11.5

7.0 11.2 1.0 12.0 ns

6.5 6.5 ns

ns

ns

HIGH or LOW
Setup Time D to CK

t

s

5.0

(*)

2.0 2.0 ns

HIGH or LOW
Hold Time D to CK

t

h

5.0

(*)

1.5 1.5 ns

HIGH or LOW

MAX

Maximum Clock

f

Frequency

t
t

(*) Voltagerangeis5V ±0.5V
Note1:Parameterguaranteedbydesign. t

Output to Output Skew

OSLH

Time (note 1)

OSHL

soLH

5.0

5.0

5.0

=|t

pLHm-tpLHn

(*)

15 90 180 80

(*)

50 85 170 75

(*)

50 1.0 1.0 ns

|,t

soHL

=|t

pHLm-tpHLn

|

MHz

4/10

74VHCT374A

CAPACITIVE CHARACTERISTICS

Symb o l Para met er Test Conditi o ns Val u e Uni t

=25oC -40 to 85oC

T

A

Min. Typ. Max. Min. Max.

Input Capacitance 4 10 10

C

IN

C

Output Capacitance 9

OUT

Power Dissipation

C

PD

15 pF

Capacitance (note 1)

1)CPDisdefinedasthevalueoftheIC’sinternalequivalentcapacitance whichis calculatedfromtheoperatingcurrentconsumptionwithoutload.(Referto
TestCircuit).Average operatingcurrent canbeobtainedbythefollowingequation.I

(opr)= CPD• VCC• fIN+ICC/8(perFlip-Flop)

CC

DYNAMICSWITCHING CHARACTERISTICS

Symb o l Para met er Test Conditi o ns Val u e Uni t

T

V

CC

(V)

V
V

V

Dynamic Low Voltage

OLP

Quiet Output (note 1, 2)

OLV

Dynamic High Voltage

IHD

5.0

5.0 2.0

C

L

=50pF

Min. Typ. Max. Min. Max.

Input (note 1, 3)

V

Dynamic Low Voltage

ILD

5.0 0.8

Input (note 1, 3)

1)Worstcasepackage.

2)Maxnumberofoutputsdefinedas(n).Datainputsaredriven0Vto3.0V,(n-1)outputsswitching andoneoutputatGND.

3)Maxnumberofdatainputs (n)switching.(n-1)switching0Vto3.0V.Inputsundertestswitching:3.0Vtothreshold(V

=25oC -40 to 85oC

A

0.6 0.9

-0.9 -0.6

),0Vtothreshold(V

ILD

),f=1MHz.

IHD

pF
pF

V

TESTCIRCUIT

TEST SWITCH

t

PLH,tPHL

t

PZL,tPLZ

t

PZH,tPHZ

CL= 15/50 pF or equivalent (includes jig and probe capacitance)

=1KΩorequivalent

R

L=R1

R

ofpulsegenerator(typically50Ω)

T=ZOUT

Open

V

CC

GND

5/10

74VHCT374A

WAVEFORM1: PROPAGATIONDELAYS, SETUP AND HOLD TIMES

(f=1MHz;50% duty cycle)

6/10

74VHCT374A

WAVEFORM2: OUTPUTENABLE AND DISABLE TIMES

(f=1MHz;50% duty cycle)

WAVEFORM3: PULSEWIDTH

7/10

74VHCT374A

SO-20 MECHANICAL DATA

DIM.

MIN. TYP. MAX. MIN. TYP. MAX.

A 2.65 0.104
a1 0.10 0.20 0.004 0.007
a2 2.45 0.096

b 0.35 0.49 0.013 0.019
b1 0.23 0.32 0.009 0.012

C 0.50 0.020

c1 45 (typ.)

D 12.60 13.00 0.496 0.512

E 10.00 10.65 0.393 0.419

e 1.27 0.050
e3 11.43 0.450

F 7.40 7.60 0.291 0.299

L 0.50 1.27 0.19 0.050

M 0.75 0.029

S 8 (max.)

mm inch

8/10

P013L

TSSOP20 MECHANICAL DATA

74VHCT374A

DIM.

mm inch

MIN. TYP. MAX. MIN. TYP. MAX.

A 1.1 0.433

A1 0.05 0.10 0.15 0.002 0.004 0.006

A2 0.85 0.9 0.95 0.335 0.354 0.374

b 0.19 0.30 0.0075 0.0118

c 0.09 0.2 0.0035 0.0079

D 6.4 6.5 6.6 0.252 0.256 0.260

E 6.25 6.4 6.5 0.246 0.252 0.256

E1 4.3 4.4 4.48 0.169 0.173 0.176

e 0.65 BSC 0.0256 BSC

K0

o

o

4

o

8

o

0

o

4

L 0.50 0.60 0.70 0.020 0.024 0.028

o

8

A2

A

A1

PIN 1 IDENTIFICATION

b

e

K

c

L

E

D

E1

1

9/10

74VHCT374A

Information furnished isbelieved to be accurate and reliable. However, STMicroelectronics assumes no responsibility forthe consequences
of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is
granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are
subject tochange without notice. Thispublication supersedes and replaces all informationpreviously supplied. STMicroelectronics products
are not authorized for use as critical components in lifesupport devices or systems withoutexpress written approval of STMicroelectronics.

The ST logo is a registeredtrademark of STMicroelectronics

 2000 STMicroelectronics – Printed in Italy – All RightsReserved

STMicroelectronics GROUP OF COMPANIES

Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy- Japan- Malaysia - Malta - Morocco

Singapore - Spain - Sweden - Switzerland - United Kingdom - U.S.A.

http://www.st.com

.

10/10