Datasheet 74AC374 Datasheet (SGS Thomson Microelectronics)

WITH 3 STATE OUTPUT NON INVERTING

■ HIGH SPEED:

■ f

■ LOWPOWER DISSIPATION:

■ HIGH NOISE IMMUNITY:

■ 50Ω TRANSMISSION LINE DRIVING

■ SYMMETRICAL OUTPUT IMPEDANCE:

■ BALANCEDPROPAGATIONDELAY S:

■ OPERATINGVOLTAGERAN GE:

■ PIN AND FUNCTION COMPATIBLE WITH

■ IMPROVED LATCH-UP IMMUNITY

DESCRIPTION

The AC374 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 metal
wiring C
power applications mantaining high speed
operation similar to equivalent Bipolar Schottky
TTL.

These 8 bit D-Type flip-flops are controlled by a

= 270 MHz (TYP.)at VCC=5V

MAX

=8µA (MAX.) at TA=25oC

I

CC

V

NIH=VNIL

=28%VCC(MIN.)
CAPABILITY
|I

|=IOL=24 mA (MIN)

OH

≅ t

t

PLH

PHL

V

(OPR) = 2V to 6V

CC

74SERIES374

2

MOS technology. It is ideal for low

74AC374

OCTAL D-TYPE FLIP FLOP

B

(Plastic Package)

(Micro Package)

ORDERCODES:

74AC374B 74AC374M

clockinput (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
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
while the outputsare off.

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

M

PINCONNECTION AND IEC LOGIC SYMBOLS

April 1997

1/10

74AC374

INPUTAND OUTPUTEQUIVALENTCIRCUIT PIN DESCRIPTION

PI N No SYM B O L NAME AND FUNCT I ON

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

Q0 to Q7 3 State Outputs

D0 to D7 Data Inputs

CC

Input (Active LOW)

HIGH, edge triggered)

Positive Supply Voltage

LOGICDIAGRAM

2/10

74AC374

ABSOLUTE MAXIMUM RATINGS

Symb o l Parame t er Val u e Uni t

V

V

V

I

I

OK

I

orI

I

CC

T

T

Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition isnot implied.

RECOMMENDED OPERATINGCONDITIONS

Symb o l Parame t er Value Un i t

V

V

V

T

dt/dv Input Rise and Fall Time V

1) VINfrom30%to70%of V

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 ± 50 mA

O

DC VCCor Ground Current ± 400 mA

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

CC
CC

o

C

o

C

V
V

o

C

3/10

74AC374

DC SPECIFICATIONS

Symbol Parameter Test Condition s Value Unit

V

CC

(V)

High Level Input Voltage 3.0 VO= 0.1 V or

V

IH

4.5 3.15 2.25 3.15

V

CC

- 0.1 V

T

=25oC-40to85

A

Min. Typ. Max. Min . Max.

2.1 1.5 2.1

o

C

5.5 3.85 2.75 3.85

Low Level Input Voltage 3.0 VO= 0.1 V or

V

IL

4.5 2.25 1.35 1.35

V

CC

- 0.1 V

1.5 0.9 0.9

5.5 2.75 1.65 1.65

High Level Output

V

OH

Voltage

Low Level Output

V

OL

Voltage

Input Leakage Current

I

I

3-State Output Off-state

I

OZ

Current

Quiescent Supply

I

CC

3.0

4.5 I

5.5 I

V
V

3.0 I

4.5 I

5.5 I

3.0

4.5 I

5.5 I

V
V

3.0 I

4.5 I

5.5 I

5.5

5.5 VI=VCCor GND
V

IO=-50 µA 2.9 2.99 2.9

(*)

I
IH

V

IL

=-50 µA 4.4 4.49 4.4

O

=

=-50 µA 5.4 5.49 5.4

or

O

=-12 mA 2.56 2.46

O

=-24 mA 3.86 3.76

O

=-24 mA 4.86 4.76

O

IO=50 µA 0.002 0.1 0.1

(*)

I
IH

V

IL

=50 µA 0.001 0.1 0.1

O

=

=50 µA 0.001 0.1 0.1

or

O

=12 mA 0.36 0.44

O

=24 mA 0.36 0.44

O

=24 mA 0.36 0.44

O

VI=VCCor GND ±0.1 ±1 µA

±0.5 ±5 µA

V

I(OE)=VIH

or GND

O=VCC

5.5 VI=VCCor GND 8 80 µA

Current
Dynamic Output Current

I

OLD

OHD

(note 1, 2)

I

1) Maximum test duration 2ms, one output loaded at time

2) Incident wave switching is guaranteed on transmission lines with impedances as low as 50 Ω.
(*)All outputs loaded.

5.5 V

= 1.65 V max 75 mA

OLD

V

= 3.85 V min -75 mA

OHD

V

V

V

V

4/10

AC ELECTRICAL CHARACTERISTICS (CL= 50 pF, RL=500 Ω, Input tr=tf=3ns)

74AC374

Symbol Parameter Test Cond ition Value Unit

o

C

ns

ns

ns

ns

ns

ns

MHz

t

Propagation Delay Time

PLH

t

CK to Q

PHL

Output EnableTime 3.3

t

PZL

t

PZH

t

Output Disable Time 3.3

PLZ

t

PHZ

Clock Pulse Width HIGH

t

w

or LOW
Setup Time Q to CK

t

s

HIGH or LOW
Hold Time Q to CK

t

h

HIGH or LOW

MAX

Maximum Clock

f

Frequency

(*) Voltagerangeis 3.3V± 0.3V
(**) Voltagerangeis5V± 0.5V

V

3.3

5.0

5.0

5.0

3.3

5.0

3.3

5.0

3.3

5.0

3.3

5.0

(V)

CC

(**)

(**)

(**)

(**)

(**)

(**)

(**)

T

=25oC-40to85

A

Min. Typ. Max. Min . Max.

(*)

6.5 12 13
59 10

(*)

7.5 12 13

5.5 9 10

(*)

7.5 12 13
69 10

(*)

1.5 5 6

1.5 4 5

(*)

-0.5 5 5

-0.5 4 4

(*)

0.5 2 3

0.5 2 3

(*)

60 250 60

100 270 100

CAPACITIVE CHARACTERISTICS

Symbol Parameter Test Condition s Value Unit

T

V

CC

(V)

C

Output Capacitance

OUT

Input Capacitance

C

IN

Power Dissipation

C

PD

5.0

5.0

5.0 46 pF

=25oC-40to85

A

Min. Typ. Max. Min . Max.

8
4

Capacitance (note 1)

1) CPDis defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without load. (Refer to
Test Circuit). Average operating current can be obtained by the following equation. I

(opr) = CPD• VCC•fIN+ICC/n (percircuit)

CC

o

C

pF
pF

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74AC374

TEST CIRCUIT

TEST SWITCH

t

PLH,tPHL

t

PZL,tPLZ

t

PZH,tPHZ

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

= 500Ω or equivalent

R

L=R1

R

of pulse generator (typically 50Ω)

T=ZOUT

Open

2V

CC

Open

WAVEFORM 1: PROPAGATIONDELAYS, SETUP AND HOLD TIMES (f=1MHz; 50% duty cycle)

6/10

WAVEFORM 2: OUTPUT ENABLE AND DISABLE TIMES (f=1MHz; 50% duty cycle)

74AC374

WAVEFORM 3: PULSE WIDTH

7/10

74AC374

Plastic DIP20 (0.25)MECHANICAL DATA

DIM.

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

a1 0.254 0.010

B 1.39 1.65 0.055 0.065
b 0.45 0.018

b1 0.25 0.010

D 25.4 1.000

E 8.5 0.335
e 2.54 0.100

e3 22.86 0.900

F 7.1 0.280

I 3.93 0.155
L 3.3 0.130
Z 1.34 0.053

mm inch

8/10

P001J

SO20 MECHANICAL DATA

74AC374

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

S8°(max.)

mm inch

P013L

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74AC374

Information furnished is believedto be accurateandreliable.However,SGS-THOMSONMicroelectronicsassumes no responsability for the
consequencesof use ofsuch information nor for anyinfringement of patentsor otherrights of third parties whichmay resultsfrom its use. No
licenseisgranted by implicationor otherwise underany patent or patentrights ofSGS-THOMSONMicroelectronics.Specificationsmentioned
in this publicationare subject to change withoutnotice.This publication supersedes andreplaces all information previously supplied.
SGS-THOMSONMicroelectronics productsarenotauthorized for useascriticalcomponents in lifesupportdevices or systems withoutexpress
writtenapproval of SGS-THOMSONMicroelectonics.

 1997 SGS-THOMSONMicroelectronics- Printedin Italy- AllRights Reserved

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