Datasheet 74ACT16244 Datasheet (SGS Thomson Microelectronics)



74ACT16244

16-BIT BUS BUFFER

WITH 3 STATE OUTPUTS (NON INVERTED)

■ HIGHSPEED:t

■

LOW POWERDISSIPATION:
I

=8 µA (MAX.)at TA=25oC

CC

■

COMPATIBLEWITH TTLOUTPUTS
V

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

IH

■ 50Ω TRANSMISSIONLINEDRIVING

=4.8ns(TYP.)atVCC=5V

PD

CAPABILITY

■ SYMMETRICALOUTPUTIMPEDANCE:

|I

|=IOL=24mA(MIN)

OH

■ BALANCEDPROPAGAT IONDELAYS:

t

≅ t

PLH

PHL

■

OPERATINGVOLTAGERANGE:
V

(OPR)= 4.5Vto5.5V

CC

■ IMPROVEDLATCH-UPIMMUNITY

DESCRIPTION

The ACT16244 is an advanced CMOS 16-BIT
BUS BUFFER (3-STATE) fabricated with
sub-micron silicon gate and double-layer metal
wiringC

2

MOStechnology.

G output controlgovernsfourBUSBUFFERs.
The device is designed to be used with 3-state

memory address drivers, clock drivers, and
bus-oriented receivers and transmitters. The
devicecan be used as four 4-bit buffers, two 8-bit
buffers,or one 16-bit buffer.
The device is designed to interface directly High
Speed CMOS systems with TTL, NMOS and
CMOSoutputvoltage levels.

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

TSSOP

ORDER CODES

PACKAGE TUBE T & R

TSSOP 74ACT16244TTR

PIN CONNECTION

February 2000

1/8

74ACT16244

INPUT AND OUTPUTEQUIVALENT CIRCUIT

PI N No SYM BO L NAM E AN D FUNCTION

1 1G Output Enable Input

2,3,5,6 1Y1to 1Y4 Data Outputs

8,9,11, 12 2Y1to2Y4 Data Outputs
13,14,16,17 3Y1to 3Y4 Data Outputs
19,20,22,23 4Y1to 4Y4 Data Outputs

24 4G Output Enable Input

25 3G Output Enable Input
30,29,27,26 4A1to 4A4 Data Inputs
36,35,33,32 3A1to 3A4 Data Inputs
41,40,38,37 2A1to 2A4 Data Inputs
47,46,44,43 1A1to 1A4 Data Inputs

48 2G Output Enable Input

4,10,15,21,

28,34,39,45

7,18,31,42 V

GND Ground (0V)

CC

Positive Supply Voltage

IEC LOGICSYMBOLSPIN DESCRIPTION

TRUTH TABLE

INPUT OUTPU T

GAnYn

LLL
LHH

HXZ

X:”H” or”L”
Z:Highimpedance

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74ACT16244

ABSOLUTE MAXIMUM RATINGS

Symb o l Parameter Val u e Uni t

V

V

V

I

I

OK

I

orI

I

CC

T

T

AbsoluteMaximumRatingsarethosevaluesbeyond whichdamagetothedevicemayoccur. Functionaloperation underthese conditionisnotimplied.

RECOMMENDED OPERATINGCONDITIONS

Symb o l Parameter Val u e Uni t

V

V

V

T

dt/dv Input Rise and Fall Time V

1)VINfrom0.8V to2.0V

Supply Voltage -0.5to+7 V

CC

DC Input Voltage -0.5toVCC+0.5 V

I

DC Output Voltage -0.5toVCC+0.5 V

O

DC Input Diode Current ±20 mA

IK

DC Output Diode Current ±20 mA
DC Output Current

O

DC VCCor Ground Current

GND

Storage Temperature -65to+150

stg

Lead Temperature (10 sec) 300

L

Supply Voltage 4.5to5.5 V

CC

Input Voltage 0toV

I

Output Voltage 0toV

O

Operating Temperature: -40to+85

op

= 4.5 to 5.5V (note 1) 8 ns/V

CC

50 mA

±

400 mA

±

CC
CC

o

C

o

C

V
V

o

C

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74ACT16244

DC SPECIFICATIONS

Symbol Parameter Test Conditions Value Unit

T

V

CC

(V)

High Level Input Voltage 4.5 VO=0.1Vor

V

IH

5.5 2.0 2.0

Low Level Input Voltage 4.5 VO=0.1Vor

V

IL

5.5 0.8 0.8

High Level Output

V

OH

Voltage

4.5 IO=-50µA 4.4 4.49 4.4

5.5 I

4.5 I

5.5 I

Low Level Output

V

OL

Voltage

4.5 IO=50µA 0.001 0.1 0.1

5.5 I

4.5 I

5.5 I

Input Leakage Current 5.5 VI=VCCorGND ±0.1 ±1 µA

I

I

High Impedance Output

I

OZ

5.5 VI=VIHorV

Leakage Current
Max ICC/Input 5.5 VI=VCC-2.1V 0.9 1 mA

I

CCT

Quiescent Supply

I

CC

5.5 VI=VCCorGND 8 80 µA

-0.1V

V

CC

V

-0.1V

CC

=-50µA 5.4 5.49 5.4

O

=-24mA 3.94 3.8

O

=-24mA 4.94 4.8

O

=50mA 0.001 0.1 0.1

O

=24mA 0.36 0.44

O

=24mA 0.36 0.44

O

IL

VO=VCCorGND

Current
Dynamic Output Current

I

OLD

(note 1, 2)

I

OHD

1) Maximumtest duration 2ms, one output loaded attime

2)Incident waveswitchingisguaranteedontransmissionlines withimpedances aslowas50 Ω.

5.5 V

=1.65Vmax 75 mA

OLD

V

=3.85V min -75 mA

OHD

=25oC - 40 to 85oC

A

Min. Typ. Max. Min. Max.

2.0 2.0

0.8 0.8

±0.5 ±5 µA

V

V

V

V

4/8

74ACT16244

AC ELECTRICAL CHARACTERISTICS (CL= 50 pF, RL= 500 Ω, Input tr=tf=3 ns)

Symbol Parameter Test Condition Value Unit

V

CC

(V)

t

Propagation Delay Time 5.0

PLH

t

PHL

Output Enable Time 5.0

t

PZL

t

PZH

t

Output Disable Time 5.0

PLZ

t

PHZ

(*)Voltagerange is5V±0.5V

(*)

(*)

(*)

CAPACITIVE CHARACTERISTICS

Symbol Parameter Test Conditions Value Unit

V

CC

(V)

C

Input Capacitance

IN

C

Output Capacitance

OUT

Power Dissipation

C

PD

Capacitance (note 1)

1)CPDisdefined as thevalueoftheIC’sinternalequivalentcapacitance whichis calculatedfromtheoperating currentconsumption without load.(Referto
TestCircuit).Average operatingcurrent canbeobtained bythefollowingequation.I

5.0

5.0

5.0 42 pF

(opr)= CPD• VCC• fIN+ICC/16(per circuit)

CC

T

=25oC - 40 to 85oC

A

Min. Typ. Max. Min. Max.

2.0 3.3 5.0 2.0 6.0 ns

3.0 4.8 6.5 3.0 8.0

4.0 6.5 8.7 4.0 9.7 ns

3.0 5.5 7.7 3.0 8.8

4.0 6.0 8.0 4.0 9.2 ns

3.0 4.6 6.4 3.0 7.3

=25oC - 40 to 85oC

T

A

Min. Typ. Max. Min. Max.

3.6
11

pF
pF

TESTCIRCUIT

TEST SWITCH

t

PLH,tPHL

t

PZL,tPLZ

t

PZH,tPHZ

CL= 50pFor equivalent (includes jigand probe capacitance)

=500Ωorequivalent

R

L=R1

R

ofpulsegenerator(typically50Ω)

T=ZOUT

Open

2V

CC

GND

5/8

74ACT16244

WAVEFORM1: PROPAGATIONDELAYS

(f=1MHz;50%dutycicle)

WAVEFORM2: OUTPUT ENABLE AND DISABLE TIME(f=1MHz; 50% duty cicle)

6/8

TSSOP48 MECHANICAL DATA

74ACT16244

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 0.17 0.27 0.0067 0.011

c 0.09 0.20 0.0035 0.0079

D 12.4 12.5 12.6 0.408 0.492 0.496

E 7.95 8.1 8.25 0.313 0.319 0.325

E1 6.0 6.1 6.2 0.236 0.240 0.244

e 0.5 BSC 0.0197 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

K

c

L

E

D

E1

1

7/8

74ACT16244

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are not authorized for use as criticalcomponents in lifesupport devices or systems withoutexpress written approval of STMicroelectronics.

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