Nexperia

74AHC573; 74AHCT573

Octal D-type transparent latch; 3-state

5.2. Pin description

Table 2. Pin description

Symbol

Pin

Description

OE

1

output enable input (active LOW)

D0 to D7

2, 3, 4, 5, 6, 7, 8, 9

data input

GND

10

ground (0 V)

LE

11

latch enable (active HIGH)

Q0 to Q7

19, 18, 17, 16, 15, 14, 13, 12

data output

VCC

20

supply voltage

6. Functional description

Table 3. Function table

H = HIGH voltage level; h = HIGH voltage level one set-up time prior to the HIGH-to-LOW LE transition;

L = LOW voltage level; l = LOW voltage level one set-up time prior to the HIGH-to-LOW LE transition;

Z = high-impedance OFF-state.

Input

Output

Operating mode

OE

LE

Dn

Internal latch

Qn

L

L

L

Enable and read register (transparent mode)

L

H

H

H

H

l

L

L

Latch and read register

L

L

h

H

H

l

L

Z

Latch register and disable outputs

H

L

h

H

Z

7. Limiting values

Table 4. Limiting values

In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V).

Symbol

Parameter

Conditions

Min

Max

Unit

VCC

supply voltage

-0.5

+7.0

V

VI

input voltage

-0.5

+7.0

V

IIK

input clamping current

VI < -0.5 V

[1]

-20

-

mA

IOK

output clamping current

VO < -0.5 V or VO > VCC + 0.5 V

[1]

-20

+20

mA

IO

output current

VO = -0.5 V to (VCC + 0.5 V)

-25

+25

mA

ICC

supply current

-

+75

mA

IGND

ground current

-75

-

mA

Tstg

storage temperature

-65

+150 °C

Ptot

total power dissipation

Tamb = -40 °C to +125 °C

[2]

-

500

mW

[1] The input and output voltage ratings may be exceeded if the input and output current ratings are observed.

[2] For SOT163-1 (SO20) package: Ptot derates linearly with 12.3 mW/K above 109 °C.

For SOT360-1 (TSSOP20) package: Ptot derates linearly with 10.0 mW/K above 100 °C.

For SOT764-1 (DHVQFN20) package: Ptot derates linearly with 12.9 mW/K above 111 °C.

74AHC_AHCT573

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© Nexperia B.V. 2020. All rights reserved

Product data sheet

Rev. 8 — 13 July 2020

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