SGS Thomson Microelectronics 74VHC541 Datasheet

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74VHC541

OCTAL BUS BUFFER

WITH 3 STATE OUTPUTS (NON INVERTED)

■ HIGH SPEED:t

■

LOW POWERDISSIPATION:
I

=4 µA(MAX.)atTA=25oC

CC

■

HIGH NOISEIMMUNITY:
V

NIH=VNIL

■ POWERDOWNPROTECTIONON INPUTS

■

SYMMETRICALOUTPUTIMPEDANCE:
|I

|=IOL=8mA (MIN)

OH

■ BALANCEDPROPAGATIONDELAYS:

t

≅ t

PLH

■ OPERATINGVOLTAGERANGE:

(OPR)= 2Vto5.5V

V

CC

■ PINANDFUNCTION COMPATIBLEWITH

=28%VCC(MIN.)

PHL

=3.6ns(TYP.)atVCC=5V

PD

74SERIES541

■ IMPROVEDLATCH-UP IMMUNITY

■ LOWNOISE:V

= 0.9V(Max.)

OLP

DESCRIPTION

The VHC541 is an advanced high speed CMOS
OCTAL BUS BUFFER (3-STATE) fabricated with
sub-micron silicon gate and double-layer metal
wiringC

2

MOStechnology.
The 3 STATE control gate operates as a two
input AND such thatif eitherG1 and G2 are high,

M

(Micro Package)

(TSSOPPackage)

T

ORDERCODES :

74VHC541M 74VHC541T

all eight outputs are in the high impedance state.
In order to enhancePC board layout, the AC541
offers a pinout having inputs and outputs on
opposite sidesof thepackage.

Power down protection is provided on all inputs
and 0 to 7V can be accepted on inputs with no
regard to the supply voltage. This device can be
used to interface 5V to 3V.
All inputs and outputs are equipped with
protection circuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.

PIN CONNECTION AND IEC LOGIC SYMBOLS

June 1999

1/8

74VHC541

INPUT EQUIVALENTCIRCUIT

TRUTH TABLE

G1 G2 An Yn

HXXZ
XHXZ

LLHH
LLLL

X:”H” or”L”
Z:Highimpedance

PIN DESCRIPTION

PI N No SYM BO L NAM E AND F UNCTI O N

1,19 G1,G2 Output Enable Input

2,3,4,5,

6,7,8,9

18,17, 16,
15,14, 13,

12, 11

10 GND Ground (0V)
20 V

INPUT OUTPUT

A1toA8 Data Inputs

Y1toY8 Data Outputs

Positive Supply Voltage

CC

ABSOLUTE MAXIMUM RATINGS

Symb o l P ara met er Val u e Uni t

V

V

V

I

I

OK

I

orI

I

CC

T

T

AbsoluteMaximumRatingsarethosevaluesbeyondwhichdamage tothedevicemayoccur.Functionaloperationunderthese conditionisnotimplied.

Supply Voltage -0.5to+7.0 V

CC

DC Input Voltage -0.5to+7.0 V

I

DC Output Voltage -0.5toVCC+0.5 V

O

DC Input Diode Current -20 mA

IK

DC Output Diode Current
DC Output Current ±25 mA

O

DC VCCor Ground Current ±75 mA

GND

Storage Temperature -65to+150

stg

Lead Temperature (10 sec) 300

L

20 mA

±

o

C

o

C

RECOMMENDED OPERATINGCONDITIONS

Symb o l P ara met er Value Un it

V

V

V

T

dt/dv

1)VINfrom30%to70%of V

Supply Voltage 2.0to5.5 V

CC

Input Voltage 0to5.5 V

I

Output Voltage 0toV

O

Operating Temperature -40to+85

op

(V

CC
CC

=3.3±0.3V)
=5.0±0.5V)

Input Rise and Fall Time (see note 1) (V

CC

CC

0to100

0to20

V

o

C

ns/V
ns/V

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74VHC541

DC SPECIFICATIONS

Symb o l Parameter Test Con diti ons Val u e Unit

T

V

CC

(V)

High Level Input

V

IH

Voltage

V

Low Level Input

IL

Voltage

V

High Level Output

OH

Voltage

2.0 1.5 1.5

3.0to5.5 0.7V

2.0 0.5 0.5

3.0to5.5 0.3V

2.0 IO=-50µA1.92.0 1.9

3.0 I

4.5 I

3.0 I

4.5 I

Low Level Output

V

OL

Voltage

2.0 IO=50µA 0.0 0.1 0.1

3.0 I

4.5 I

3.0 I

4.5 I

High Impedance

I

OZ

Output Leakage

5.5

Current
Input Leakage Current 0to5.5 VI=5.5VorGND

I

I

Quiescent Supply

I

CC

5.5 VI=VCCorGND 4 40

Current

Min. Typ. Max. Min. Max.

=-50µA2.93.0 2.9

O

=-50µA4.44.5 4.4

O

=-4mA 2.58 2.48

O

=-8mA 3.94 3.8

O

=50µA 0.0 0.1 0.1

O

=50µA 0.0 0.1 0.1

O

=4mA 0.36 0.44

O

=8mA 0.36 0.44

O

VI=VIHorV

IL

VO=VCCorGND

=25oC -40 t o 85oC

A

±

±

0.7V

CC

0.25

0.1

CC

CC

0.3V

±

±

2.5

1.0

CC

µ

µ
µ

V

V

V

V

A

A
A

AC ELECTRICAL CHARACTERISTICS (Input tr=tf=3 ns)

Symbol Parameter Test Conditi on Value Unit

t

Propagation Delay

PLH

t

Time

PHL

Output Enable Time 3.3

t

PZL

t

PZH

t

Output Disable Time 3.3

PLZ

t

PHZ

t
t

(*) Voltagerangeis3.3V± 0.3V
(**) Voltagerange is 5V±0.5V
Note1:Parameterguaranteed bydesign. t

Output to Output Skew

OSLH

Time (note 1)

OSHL

soLH

V

(V)

3.3

3.3

5.0

5.0

3.3

5.0

5.0

5.0

3.3

5.0

=|t

pLHm-tpLHn

CC

C

L

(pF)

(*)

(*)
(**)
(**)

(*)

(*)
(**)
(**)

(*)
(**)

(*)
(**)

15 5.0 7.0 1.0 8.5
50 7.5 10.5 1.0 12.0
15 3.5 5.0 1.0 6.0
50 5.0 7.0 1.0 8.0
15 RL=1KΩ 6.8 10.5 1.0 12.5
50 RL=1K
15 RL=1KΩ 4.7 7.2 1.0 8.5
50 RL=1K
50 RL=1KΩ 11.2 15.4 1.0 17.5
50 RL=1K
50 1.5 1.5 ns
50

|,t

soHL

=|t

pHLm-tpHLn

|

Min. Typ. Max. Min. Max.

Ω

Ω

Ω

=25oC -40 t o 85oC

T

A

9.3 14.0 1.0 16.0

6.2 9.2 1.0 10.5

6.0 8.8 1.0 10.0

1.0 1.0

ns

ns

ns

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