74HC573D-T - Philips Semiconductors / NXP Semiconductors

DATA SH EET

Product speciﬁcation

File under Integrated Circuits, IC06 December 1990

INTEGRATED CIRCUITS

74HC/HCT573

Octal D-type transparent latch;

3-state

For a complete data sheet, please also download:

•The IC06 74HC/HCT/HCU/HCMOS Logic Family Specifications

•The IC06 74HC/HCT/HCU/HCMOS Logic Package Information

•The IC06 74HC/HCT/HCU/HCMOS Logic Package Outlines

December 1990 2

Philips Semiconductors Product speciﬁcation

Octal D-type transparent latch; 3-state 74HC/HCT573

FEATURES

•Inputs and outputs on opposite

sides of package allowing easy

interface with microprocessors

•Useful as input or output port for

microprocessors/microcomputers

•3-state non-inverting outputs for

bus oriented applications

•Common 3-state output enable

input

•Functionally identical to the “563”

and “373”

•Output capability: bus driver

•ICC category: MSI

GENERAL DESCRIPTION

The 74HC/HCT573 are high-speed

Si-gate CMOS devices and are pin

compatible with low power Schottky

TTL (LSTTL). They are specified in

compliance with JEDEC standard no.

7A.

The 74HC/HCT573 are octal D-type

transparent latches featuring

separate D-type inputs for each latch

and 3-state outputs for bus oriented

applications.

A latch enable (LE) input and an

output enable (OE) input are common

to all latches.

The “573” consists of eight D-type

transparent latches with 3-state true

outputs. When LE is HIGH, data at

the Dn inputs enter the latches. In this

condition the latches are transparent,

i.e. a latch output will change state

each time its corresponding D-input

changes.

When LE is LOW the latches store the

information that was present at the

D-inputs a set-up time preceding the

HIGH-to-LOW transition of LE.

When OE is LOW, the contents of the

8 latches are available at the outputs.

When OE is HIGH, the outputs go to

the high impedance OFF-state.

Operation of the OE input does not

affect the state of the latches.

The “573” is functionally identical to

the “563” and “373”, but the “563” has

inverted outputs and the “373” has a

different pin arrangement.

QUICK REFERENCE DATA

GND = 0 V; Tamb =25°C; tr=t

f= 6 ns

Notes

1. CPD is used to determine the dynamic power dissipation (PD in µW):

PD=C

PD × VCC2× fi+∑ (CL× VCC2 × fo) where:

fi= input frequency in MHz; fo= output frequency in MHz

∑ (CL× VCC2× fo) = sum of outputs

CL= output load capacitance in pF; VCC = supply voltage in V

2. For HC the condition is VI= GND to VCC; for HCT the condition is VI= GND to VCC − 1.5 V

ORDERING INFORMATION

See

“74HC/HCT/HCU/HCMOS Logic Package Information”

SYMBOL PARAMETER CONDITIONS TYPICAL UNIT

HC HCT

tPHL/ tPLH propagation delay CL= 15 pF; VCC =5 V

to Qn14 17 ns

LE to Qn15 15 ns

CIinput capacitance 3.5 3.5 pF

CPD power dissipation capacitance per latch notes 1 and 2 26 26 pF

December 1990 3

Philips Semiconductors Product speciﬁcation

Octal D-type transparent latch; 3-state 74HC/HCT573

PIN DESCRIPTION

PIN NO. SYMBOL NAME AND FUNCTION

2, 3, 4, 5, 6, 7, 8, 9 D0 to D7data inputs

11 LE latch enable input (active HIGH)

1OE 3-state output enable input (active LOW)

10 GND ground (0 V)

19, 18, 17, 16, 15, 14, 13, 12 Q0 to Q73-state latch outputs

20 VCC positive supply voltage

Fig.1 Pin configuration. Fig.2 Logic symbol. Fig.3 IEC logic symbol.

December 1990 4

Philips Semiconductors Product speciﬁcation

Octal D-type transparent latch; 3-state 74HC/HCT573

Fig.4 Functional diagram.

FUNCTION TABLE

Notes

1. 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

OPERATING

MODES INPUTS INTERNAL

LATCHES OUTPUTS

OE LE DNQ0to Q7

enable and read

(transparent mode)

latch and read

latch register and

disable outputs H

Fig.5 Logic diagram.

December 1990 5

Philips Semiconductors Product speciﬁcation

Octal D-type transparent latch; 3-state 74HC/HCT573

DC CHARACTERISTICS FOR 74HC

For the DC characteristics see

“74HC/HCT/HCU/HCMOS Logic Family Specifications”

Output capability: bus driver

ICC category: MSI

AC CHARACTERISTICS FOR 74HC

GND = 0 V; tr=t

f= 6 ns; CL= 50 pF

SYMBOL PARAMETER

Tamb (°C)

UNIT

TEST CONDITIONS

74HC VCC

(V) WAVEFORMS+25 −40 to +85 −40 to +125

min. typ. max. min. max. min. max.

tPHL/ tPLH propagation delay

Dn to Qn

150

190

225

ns 2.0

4.5

6.0

Fig.6

tPHL/ tPLH propagation delay

LE to Qn

150

190

225

ns 2.0

4.5

6.0

Fig.7

tPZH/ tPZL 3-state output enable

time OE to Qn

140

175

210

ns 2.0

4.5

6.0

Fig.8

tPHZ/ tPLZ 3-state output disable

time OE to Qn

150

190

225

ns 2.0

4.5

6.0

Fig.8

tTHL/ tTLH output transition time 14

ns 2.0

4.5

6.0

Fig.6

tWenable pulse width

HIGH 80

100

120

ns 2.0

4.5

6.0

Fig.7

tsu set-up time

Dn to LE 50

ns 2.0

4.5

6.0

Fig.9

thhold time

Dn to LE 5

ns 2.0

4.5

6.0

Fig.9

December 1990 6

Philips Semiconductors Product speciﬁcation

Octal D-type transparent latch; 3-state 74HC/HCT573

DC CHARACTERISTICS FOR 74HCT

For the DC characteristics see

“74HC/HCT/HCU/HCMOS Logic Family Specifications”

Output capability: bus driver

ICC category: MSI

Note to HCT types

The value of additional quiescent supply current (∆ICC) for a unit load of 1 is given in the family specifications.

To determine ∆ICC per input, multiply this value by the unit load coefficient shown in the table below.

AC CHARACTERISTICS FOR 74HCT

GND = 0 V; tr=t

f= 6 ns; CL= 50 pF

INPUT UNIT LOAD COEFFICIENT

0.35

0.65

1.25

SYMBOL PARAMETER

Tamb (°C)

UNIT

TEST CONDITIONS

74HCT VCC

(V) WAVEFORMS+25 −40 to +85 −40 to +125

min. typ. max. min. max. min. max.

tPHL/ tPLH propagation delay

Dn to Qn

20 35 44 53 ns 4.5 Fig.6

tPHL/ tPLH propagation delay

LE to Qn

18 35 44 53 ns 4.5 Fig.7

tPZH/ tPZL 3-state output enable

time

OE to Qn

17 30 38 45 ns 4.5 Fig.8

tPHZ/ tPLZ 3-state output disable

time

OE to Qn

18 30 38 45 ns 4.5 Fig.8

tTHL/ tTLH output transition time 5 12 15 18 ns 4.5 Fig.6

tWenable pulse width

HIGH 16 5 20 24 ns 4.5 Fig.7

tsu set-up time

Dn to LE 13 7 16 20 ns 4.5 Fig.9

thhold time

Dn to LE 9 4 11 14 ns 4.5 Fig.9

December 1990 7

Philips Semiconductors Product speciﬁcation

Octal D-type transparent latch; 3-state 74HC/HCT573

AC WAVEFORMS

Fig.6 Waveforms showing the data input (Dn) to

output (Qn) propagation delays and the

output transition times.

(1) HC : VM= 50%; VI= GND to VCC.

HCT: VM= 1.3 V; VI= GND to 3 V.

Fig.7 Waveforms showing the latch enable input

(LE) pulse width, the latch enable input to

output (Qn) propagation delays and the

output transition times.

(1) HC : VM= 50%; VI= GND to VCC.

HCT: VM= 1.3 V; VI= GND to 3 V.

Fig.8 Waveforms showing the 3-state enable and

disable times.

(1) HC : VM= 50%; VI= GND to VCC.

HCT: VM= 1.3 V; VI= GND to 3 V. PACKAGE OUTLINES

See

“74HC/HCT/HCU/HCMOS Logic Package Outlines”

Fig.9 Waveforms showing the data set-up and

hold times for Dn input to LE input.

The shaded areas indicate when the input is permitted to

change for predictable output performance.

(1) HC : VM= 50%; VI= GND to VCC.

HCT: VM= 1.3 V; VI= GND to 3 V.