Datasheet 74VHCT126A Datasheet (SGS Thomson Microelectronics)



QUAD BUS BUFFERS (3-STATE)

■ HIGHSPEED:t

■ LOW POWER DISSIPATION:

I

=4 µA (MAX.) at TA=25oC

CC

■ COMPATIBLEWITHTTL OUTPUTS:

=2V(MIN),VIL=0.8V(MAX)

V

IH

■ POWERDOWNPROTECTIONON INPUTS&

OUTPUTS

■ SYMMETRICALOUTPUTIMPEDANCE:

|I

|=IOL=8 mA(MIN)

OH

■ BALANCEDPROPAGATIONDELAYS:

t

≅ t

PLH

PHL

■ OPERATINGVOLTAGERANGE:

V

(OPR)= 4.5V to 5.5V

CC

■ PINANDFUNCTION COMPATIBLEWITH

74SERIES126

■ IMPROVEDLATCH-UP IMMUNITY

■ LOWNOISE:V

DESCRIPTION

The 74VHCT126A is an advanced high-speed
CMOS QUAD BUS BUFFERS fabricated with
sub-micron silicon gate and double-layer metal
wiringC

2

MOStechnology.

=5ns(TYP.)atVCC=5V

PD

= 0.8V(Max.)

OLP

74VHCT126A

PRELIMINARY DATA

SOP TSSOP

ORDER CODES

PACKAGE TUBE T & R

SOP 74VHCT126AM 74VHCT126AMTR

TSSOP 74VHCT126ATTR

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 outputs and 0 to 7V can be accepted on
inputs with no regard to the supply voltage. This
devicecan be usedto 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 IECLOGIC SYMBOLS

March 2000

1/8

74VHCT126A

INPUT EQUIVALENTCIRCUIT

PIN DESCRIPTION

PI N No SYMB OL NAME AND FU NCTI O N

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: High Impedance

ABSOLUTE MAXIMUMRATINGS

Symb o l Para met er Value U n i t

V

V
V
V

I

I

OK

I

or I

I

CC

T

T

AbsoluteMaximumRatingsarethosevaluesbeyondwhichdamage tothedevicemayoccur. Functionaloperationunderthesecondition isnotimplied.

1)Outputin OFFState

2)HighorLowState

Supply Voltage -0.5 to +7.0 V

CC

DC Input Voltage -0.5 to +7.0 V

I

DC Output Voltage (see note 1) -0.5 to +7.0 V

O

DC Output Voltage (see note 2) -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 Unit

V

V
V
V

T

dt/dv

1)Outputin OFFState

2)HighorLowState
from0.8Vto 2V

3)V

IN

2/8

Supply Voltage 4.5 to 5.5 V

CC

Input Voltage 0 to 5.5 V

I

Output Voltage (see note 1) 0 to 5.5 V

O

Output Voltage (see note 2) 0 to V

O

Operating Temperature -40 to +85

op

Input Rise and Fall Time (see note 3) (V

=5.0±0.5V)

CC

CC

0 to 20 ns/V

V

o

C

74VHCT126A

DC SPECIFICATIONS

Symb o l Parameter Test C o n di ti o ns Val u e Uni t

T

=25oC -40 to 85oC

A

±0.25 ±2.5 µA

1.35 1.5 mA

µ

µ

V

V

V

V

I

I

∆I

I

OPD

V

CC

High Level Input

IH

(V)

4.5 to 5.5 2 2 V

Min. Typ. Max. Min. Max.

Voltage
Low Level Input

IL

4.5 to 5.5 0.8 0.8 V

Voltage
High Level Output

OH

Voltage
Low Level Output

OL

Voltage
High Impedance

OZ

Output Leakage

4.5 IO=-50µA 4.4 4.5 4.4

4.5 I

=-8 mA 3.94 3.8

O

4.5 IO=50µA 0.0 0.1 0.1

4.5 I

4.5 to 5.5 VI=VIHor V

=8 mA 0.36 0.44

O

IL

VO= 0V to 5.5V

Current
Input Leakage Current 0 to5.5 VI= 5.5V or GND ±0.1 ±1.0 µA

I

I

Quiescent Supply

CC

5.5 VI=VCCorGND 4 40

Current
Additional Worst Case

CC

Supply Current

5.5 One Input at 3.4V,
other input at V

CC

or

GND

Output Leakage

0V

= 5.5V 0.5 5.0

OUT

Current

V

V

A

A

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

Symbol Parameter Test Condition Value Unit

t

Propagation Delay

PLH

t

Time

PHL

Output Enable Time 5.0

t

PZL

t

PZH

t

Output Disable Time 5.0

PLZ

t

PHZ

(*) Voltagerangeis 5.0V ± 0.5V

V

(V)

5.0

5.0

5.0

CC

C

L

(pF)

(*)

15 3.8 5.5 1.0 6.5

(*)

50 5.3 7.5 1.0 8.5

(*)
(*)
(*)

15 RL=1K

50 RL=1KΩ 5.1 7.1 1.0 8.0

50 RL=1K

Min. Typ. Max. Min. Max.

Ω

Ω

=25oC -40 to 85oC

T

A

3.6 5.1 1.0 6.0

6.1 8.8 1.0 10.0 ns

ns

ns

3/8

74VHCT126A

CAPACITIVE CHARACTERISTICS

Symbol Parameter Test Conditions Value Unit

=25oC -40 to 85oC

T

A

Min. Typ. Max. Min. Max.

Input Capacitance 4 10 10

C

IN

C

Output Capacitance 10

OUT

Power Dissipation

C

PD

14 pF

Capacitance (note 1)

1)CPDisdefinedasthevalue oftheIC’sinternalequivalentcapacitance whichiscalculatedfromtheoperating currentconsumption without load.(Referto
TestCircuit).Averageopertingcurrent canbe obtainedbythefollowingequation. I

(opr)= CPD• VCC• fIN+ICC/4(percircuit)

CC

DYNAMICSWITCHING CHARACTERISTICS

Symb o l Parameter Test C o n di ti o 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 2.0

C

L

=50pF

Min. Typ. Max. Min. Max.

Input (note 1, 3)

V

Dynamic Low Voltage

ILD

5.0 0.8

Input (note 1, 3)

1)Worstcasepackage.

2)Maxnumberofoutputs defined as(n).Datainputsaredriven0Vto5.0V,(n-1)outputsswitching andoneoutputatGND.

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

),0V tothreshold(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

74VHCT126A

WAVEFORM1: PROPAGATION DELAYS

(f=1MHz;50% dutycycle)

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

5/8

74VHCT126A

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

74VHCT126A

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 0.0256 BSC

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

74VHCT126A

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