SGS Thomson Microelectronics 74AC573 Datasheet

74AC573

OCTAL D-TYPE LATCH

WITH 3 STATE OUTPUT NON INVERTING

■ HIGH SPEED: t

■ LOWPOWER DISSIPATION:

=8µA (MAX.) at TA=25oC

I

CC

■ HIGH NOISE IMMUNITY:

V

NIH=VNIL

■ 50Ω TRANSMISSIONLINE DRIVING

= 4.5 ns(TYP.) at VCC=5V

PD

=28%VCC(MIN.)

CAPABILITY

■ SYMMETRICAL OUTPUT IMPEDANCE:

|I

|=IOL=24 mA (MIN)

OH

■ BALANCEDPROPAGATIONDELAY S:

t

≅ t

PLH

PHL

■ OPERATINGVOLTAGERAN GE:

V

(OPR) = 2V to 6V

CC

■ PIN AND FUNCTION COMPATIBLE WITH

74SERIES573

■ IMPROVED LATCH-UP IMMUNITY

DESCRIPTION

The AC573 is an advanced high-speed CMOS
OCTAL D-TYPE LATCH with 3 STATE OUTPUT
NON INVERTING fabricated with sub-micron
silicon gate and double-layermetal wiringC

2

MOS
technology. It is ideal for low power applications
mantaining high speed operation similar to
equivalentBipolarSchottkyTTL.

These 8 bit D-Type latches are controlled by a

B

(Plastic Package)

(Micro Package)

M

ORDERCODES:

74AC573B 74AC573M

latch enable input (LE) and an output enable
input (OE).

While the LE input is held at a high level, the Q
outputswill follow the data input precisely.

When the LE is taken low, the Q outputs will be
latchedpreciselyat thelogic level of D inputdata.

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.

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

PINCONNECTION AND IEC LOGICSYMBOLS

April 1997

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74AC573

INPUTAND OUTPUTEQUIVALENTCIRCUIT PIN DESCRIPTION

PI N No SYM B O L NAME AND F UNC T I ON

1 OE 3 State Output Enable

2, 3, 4,
5, 6, 7,

8, 9

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

18, 19

11 LE Latch Enable

10 GND Ground (0V)
20 V

TRUTH TABLE

INPUTS OUTPUTS

OE LE D Q

HXXZ
L L X NO CHANGE *
LHLL
LHHH

X:Don’tcare
Z: High impedance
* Q output are latched at the timewhen the LEinputs taken low logic level.

D0 to D7 Data Inputs

Q0 to Q7 3 State Latch Outputs

CC

Input (Active LOW)

Input

Positive Supply Voltage

LOGICDIAGRAM

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74AC573

ABSOLUTE MAXIMUM RATINGS

Symb o l Parameter 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 is not implied.

RECOMMENDED OPERATINGCONDITIONS

Symb o l Parameter 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

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