Datasheet 74VHC126 Datasheet (SGS Thomson Microelectronics)



QUAD BUS BUFFERS (3-STATE)

■ HIGHSPEED:t

■ LOW POWER DISSIPATION:

I

=4 µA (MAX.) at TA=25oC

CC

■ HIGHNOISEIMMUNITY:

V

NIH=VNIL

■ POWERDOWNPROTECTIONON INPUTS

■ SYMMETRICALOUTPUTIMPEDANCE:

|I

|=IOL=8 mA(MIN)

OH

■ BALANCEDPROPAGATIONDELAYS:

≅ t

t

PLH

■ OPERATINGVOLTAGERANGE:

V

(OPR)= 2Vto 5.5V

CC

■ PINANDFUNCTION COMPATIBLEWITH

=28%VCC(MIN.)

PHL

74SERIES126

■ IMPROVEDLATCH-UP IMMUNITY

■ LOWNOISE:V

DESCRIPTION

The 74VHC126 is an advanced high-speed
CMOS QUAD BUS BUFFERS fabricated with
sub-micron silicon gate and double-layer metal
wiringC

2

MOStechnology.

=3.8ns(TYP.)atVCC=5V

PD

= 0.8V(Max.)

OLP

74VHC126

PRELIMINARY DATA

M

(Micro Package)

(TSSOPPackage)

ORDERCODES :

74VHC126M 74VHC126T

This device requires the 3-STATEcontrol input G
to be set low to place the output into the high
impedancestate.

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 interface5V to 3V.

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

T

PIN CONNECTION AND IECLOGIC SYMBOLS

June 1999

1/8

74VHC126

INPUT EQUIVALENTCIRCUIT

PIN DESCRIPTION

PI N No SYMB OL NAME AND FU NCTION

1, 4, 10, 13 1G to 4G Output Enable Inputs

2, 5, 9, 12 1A to 4A Data Inputs

3, 6, 8, 11 1Y to 4Y Data Outputs

7 GND Ground (0V)

14 V

CC

Positive Supply Voltage

TRUTH TABLE

AGY

XLZ

LHL

HHH

X:”H” or”L”
Z: HighImpedance

ABSOLUTE MAXIMUMRATINGS

Symb o l Para met er Val u e Uni t

V

V

V

I

I

OK

I

or I

I

CC

T

T

AbsoluteMaximumRatingsarethosevalues beyond whichdamagetothedevicemayoccur. Functionaloperationundertheseconditionisnotimplied.

Supply Voltage -0.5 to +7.0 V

CC

DC Input Voltage -0.5 to +7.0 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 ± 25 mA

O

DC VCCor Ground Current ± 50 mA

GND

Storage Temperature -65 to +150

stg

Lead Temperature (10 sec) 300

L

o

C

o

C

RECOMMENDEDOPERATINGCONDITIONS

Symb o l Para met er Value Un it

V

V

V

T

dt/dv

1)VINfrom30%to70%of V

2/8

Supply Voltage 2.0 to 5.5 V

CC

Input Voltage 0 to 5.5 V

I

Output Voltage 0 to V

O

Operating Temperature -40 to +85

op

(V

CC
CC

=3.3±0.3V)
=5.0±0.5V)

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

CC

CC

0 to 100

0to20

V

o

C

ns/V
ns/V

74VHC126

DC SPECIFICATIONS

Symb o l Para meter Test C o n ditio ns Val u e Uni t

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

3.0 to 5.5 0.7V

2.0 0.5 0.5

3.0 to 5.5 0.3V

2.0 IO=-50µA 1.9 2.0 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

VO=VCCor GND

Current
Input Leakage Current 0 to 5.5 VI= 5.5V or GND

I

I

Quiescent Supply

I

CC

5.5 VI=VCCorGND 4 40

Current

Min. Typ. Max. Min. Max.

=-50µA 2.9 3.0 2.9

O

=-50µA 4.4 4.5 4.4

O

=-4 mA 2.58 2.48

O

=-8 mA 3.94 3.8

O

=50µA 0.0 0.1 0.1

O

=50µA 0.0 0.1 0.1

O

=4 mA 0.36 0.44

O

=8 mA 0.36 0.44

O

VI=VIHor V

IL

=25oC -40 to 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 Condition Value Unit

t

Propagation Delay

PLH

t

Time

PHL

t

Output Disable Time 3.3

PLZ

t

PHZ

Output Enable Time 3.3

t

PZL

t

PZH

(*) Voltagerangeis3.3V± 0.3V
(**) Voltagerangeis 5V± 0.5V

V

3.3

3.3

5.0

5.0

3.3

5.0

5.0

5.0

CC

(V)

(**)
(**)

(**)
(**)

(**)

C

L

(pF)

(*)

15 5.6 8.0 1.0 9.5

(*)

50 8.1 11.5 1.0 13.0

T

=25oC -40 to 85oC

A

Min. Typ. Max. Min. Max.

15 3.8 5.5 1.0 6.5
50 5.3 7.5 1.0 8.5

(*)
(*)

15 RL=1K
50 RL=1K

Ω
Ω

5.4 8.0 1.0 9.5

7.9 11.5 1.0 13.0
15 RL=1KΩ 3.6 5.1 1.0 6.0
50 RL=1K

(*)

50 RL=1KΩ 9.5 13.2 1.0 15.0
50 RL=1K

Ω

Ω

5.1 7.1 1.0 8.0

6.1 8.8 1.0 10.0

ns

ns

ns

3/8

74VHC126

CAPACITIVE CHARACTERISTICS

Symbol Parameter Test Conditi ons Value Unit

=25oC -40 to 85oC

T

A

Min. Typ. Max. Min. Max.

Input Capacitance 4 10 10

C

IN

C

Output Capacitance 6

OUT

Power Dissipation

C

PD

15 pF

Capacitance (note 1)

1)CPDisdefinedasthevalueoftheIC’sinternal equivalentcapacitance whichiscalculatedfromtheoperatingcurrentconsumptionwithoutload. (Referto
TestCircuit).Average opertingcurrent canbeobtainedbythefollowingequation. I

(opr)=CPD• VCC• fIN+ICC/4(percircuit)

CC

DYNAMICSWITCHING CHARACTERISTICS

Symb o l Para meter Test C o n ditio ns Val u e Uni t

T

V

CC

(V)

V
V

V

Dynamic Low Voltage

OLP

Quiet Output (note 1, 2)

OLV

Dynamic High Voltage

IHD

5.0

5.0 3.5

C

L

=50pF

Min. Typ. Max. Min. Max.

Input (note 1, 3)

V

Dynamic Low Voltage

ILD

5.0 1.5

Input (note 1, 3)

1)Worstcase package.

2)Maxnumberofoutputs defined as(n).Datainputsaredriven0Vto 5.0V,(n -1)outputsswitching andoneoutputat GND.

3)Maxnumberofdatainputs(n)switching.(n-1)switching0Vto5.0V.Inputs under test switching: 5.0Vtothreshold(V

=25oC -40 to 85oC

A

0.3 0.8

-0.8 -0.3

),0Vtothreshold(V

ILD

),f=1MHz.

IHD

pF
pF

V

TESTCIRCUIT

TEST SWITCH

t

PLH,tPHL

t

PZL,tPLZ

t

PZH,tPHZ

CL= 15/50 pF orequivalent (includes jig and probe capacitance)

=1KΩorequivalent

R

L=R1

R

ofpulsegenerator(typically50Ω)

T=ZOUT

Open

V

CC

GND

4/8

74VHC126

WAVEFORM1: PROPAGATION DELAYS

(f=1MHz;50% dutycycle)

WAVEFORM2: OUTPUTENABLE AND DISABLE TIME(f=1MHz; 50% duty cycle)

5/8

74VHC126

SO-14 MECHANICALDATA

DIM.

MIN. TYP. MAX. MIN. TYP. MAX.

A 1.75 0.068
a1 0.1 0.2 0.003 0.007
a2 1.65 0.064

b 0.35 0.46 0.013 0.018
b1 0.19 0.25 0.007 0.010

C 0.5 0.019

c1 45 (typ.)

D 8.55 8.75 0.336 0.344

E 5.8 6.2 0.228 0.244

e 1.27 0.050
e3 7.62 0.300

F 3.8 4.0 0.149 0.157

G 4.6 5.3 0.181 0.208

L 0.5 1.27 0.019 0.050

M 0.68 0.026

S 8 (max.)

mm inch

6/8

P013G

TSSOP14 MECHANICAL DATA

74VHC126

DIM.

mm inch

MIN. TYP. MAX. MIN. TYP. MAX.

A 1.1 0.433

A1 0.05 0.10 0.15 0.002 0.004 0.006

A2 0.85 0.9 0.95 0.335 0.354 0.374

b 0.19 0.30 0.0075 0.0118

c 0.09 0.20 0.0035 0.0079

D 4.9 5 5.1 0.193 0.197 0.201

E 6.25 6.4 6.5 0.246 0.252 0.256

E1 4.3 4.4 4.48 0.169 0.173 0.176

e 0.65 BSC 0.0256BSC

K0

o

o

4

o

8

o

0

o

4

L 0.50 0.60 0.70 0.020 0.024 0.028

o

8

A2

A

A1

PIN 1 IDENTIFICATION

b

e

c

K

L

E

D

E1

1

7/8

74VHC126

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subject tochange withoutnotice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products
are not authorized for use as critical components inlife support devices or systems without express written approval of STMicroelectronics.

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