ST M74HCT573 User Manual

M74HCT573

OCTAL D-TYPE LATCH

WITH 3 STATE OUTPUT NON INVERTING

■ HIGH SPEED:

t

= 21ns (TYP.) at VCC = 4.5V

PD

■ LOW POWER DISSIPATION:

I

= 4µA(MAX.) at TA=25°C

CC

■ COMPA TIBLE WITH TTL OUTPUTS :

V

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

IH

■ BALANCED PROPAGATION DELAYS:

t

≅ t

PLH

■ SYMMETRICAL OUTPUT IMPEDANCE:

|I

OH

■ PIN AND FUNCTION COMPATIBLE WITH

PHL

| = IOL = 6mA (MIN)

74 SERIES 573

DESCRIPTION

The M74HCT573 is an high speed CMOS OCTAL
LATCH WITH 3-STATE OUTPUTS fabricated
with silicon gate C

2

MOS technology.
This 8-BIT D-Type la tches is controlled by a latc h
enable input (LE) and output enable input (OE

).
While the LE in put is held at a high level, the Q
outputs will follow the data input precisely. Wh en
the LE is taken low, the Q outputs will be latched
precisely at the logic level of D input data.
While the OE

input is at low level, the eight outputs
will be in a norm al logic state (high or low logic
level) and while OE

is at high level the outputs will

be in a high impedance state.

TSSOPDIP SOP

ORDER CODES

PACKAGE TUBE T & R

DIP M74HCT573B1R

SOP M74HCT573M1R M74HCT573RM13TR

TSSOP M74HCT573TTR

The 3-State output configuration and the wide
choice of outline make bus organized system
simple.
The M74HCT573 is designed to directly interface

2

HSC

MOS systems with TTL and NMOS
components.
All inputs are equipped with protection circuits
against static discharge and transient excess
voltage.

PIN CONNECTION AND IEC LOGIC SYMBOLS

1/11July 2001

M74HCT573

INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION

PIN No SYMBOL NAME AND FUNCTION

1OE

2, 3, 4, 5, 6,

7, 8, 9

12, 13, 14,
15, 16, 17,

18, 19

11 LE Latch Enable Input
10 GND Ground (0V)
20 V

TRUTH TABLE

INPUTS OUTPUTS

D0 to D7 Data Inputs

Q0 to Q7 3 State Latch Outputs

CC

3 State Output Enable
Input (Active LOW)

Positive Supply Voltage

OE

HXXZ

L L X NO CHANGE (*)
LHLL
LHHH

X: Don’t Care
Z: High Impedance
(*): Q Outputs are lat ched at the time when the LE i nput is taken lo w l ogic level.

LE D Q

LOGIC DIAGRAM

2/11

M74HCT573

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V

V

V

I

I

OK

I

I

or I

CC

P

T

T

Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied
(*) 500mW at 65

RECOMMENDED OPERATING CONDITIONS

Symbol Parameter Value Unit

V

V

V
T
t

r

Supply Voltage

CC

DC Input Voltage -0.5 to VCC + 0.5

I

DC Output Voltage -0.5 to VCC + 0.5

O

DC Input Diode Current

IK

DC Output Diode Current
DC Output Current

O

DC VCC or Ground Current

GND

Power Dissipation

D

Storage Temperature

stg

Lead Temperature (10 sec)

L

°C; derate to 300mW by 10mW/°C from 65° C to 85°C

Supply Voltage

CC

Input Voltage 0 to V

I

Output Voltage 0 to V

O

Operating Temperature

op

, t

Input Rise and Fall Time (VCC = 4.5 to 5.5V)

f

-0.5 to +7 V

± 20 mA
± 20 mA
± 35 mA
± 70 mA

500(*) mW

-65 to +150 °C

300 °C

4.5 to 5.5 V

CC
CC

-55 to 125 °C
0 to 500 ns

V
V

V
V

3/11

M74HCT573

DC SPECIFICATIONS

Symbol Parameter

V

V

V

V

I

I

∆ I

High Level Input

IH

Voltage

Low Level Input

IL

Voltage

High Level Output

OH

Voltage
Low Level Output

OL

Voltage

I

Input Leakage

I

Current
High Impedance

OZ

Output Leakage
Current

Quiescent Supply

CC

Current
Additional Worst

CC

Case Supply
Current

Test Condition Value

T

= 25°C

V

CC

(V)

A

Min. Typ. Max. Min. Max. Min. Max.

4.5
to

2.0 2.0 2.0 V

5.5

4.5
to

0.8 0.8 0.8 V

5.5

4.5

4.5

5.5

5.5

5.5

IO=-20 µA

I

=-6.0 mA

O

IO=20 µA

I

=6.0 mA

O

= VCC or GND

V

I

= VIH or V

V

I

VO = VCC or GND

= VCC or GND

V

I

5.5 Per Input pin

= 0.5V or

V

I

V

= 2.4V

I

4.4 4.5 4.4 4.4

4.18 4.31 4.13 4.10

0.0 0.1 0.1 0.1

0.17 0.26 0.33 0.40
± 0.1 ± 1 ± 1 µA

IL

± 0.5 ± 5 ± 10 µA

2.0 2.9 3.0 mA

Other Inputs at

V

or GND

CC

-40 to 85°C -55 to 125°C

Unit

V

V

44080µA

AC ELECTRICAL CHARACTERISTICS (C

Test Condition Value

Symbol Parameter

t

TLH tTHL

t

PLH tPHL

t

PLH tPHL

t

PZL tPZH

t

PLZ tPHZ

t

W(L)

t

W(H)

Output Transition
Time

Propagation Delay
Time (LE - Q,Q

Propagation Delay
Time (D - Q,Q

Output Enable
Time

Output Disable
Time

Minimum Pulse
Width (LE)

Minimum Set-Up

t

s

Time
Minimum Hold

t

h

Time

)

V

C

(pF)

L

CC

(V)

4.5 50 7 12 15 18 ns

4.5 50 21 33 41 50

)

4.5 150 25 39 49 59

4.5 50 19 30 38 45

4.5 150 23 36 45 54

4.5 50

4.5 150 23 36 45 54

4.5 50

4.5 50 7 15 19 22 ns

4.5 50 4 10 13 15 ns

4.5 50 5 5 5 ns

= 50 pF, Input tr = tf = 6ns)

L

= 25°C

T

A

Min. Typ. Max. Min. Max. Min. Max.

= 1 KΩ

R

L

= 1 KΩ

R

L

19 30 38 45

18 25 31 38 ns

-40 to 85°C -55 to 125°C

Unit

ns

ns

ns

4/11