Datasheet 74AC16244TTR Datasheet (SGS Thomson Microelectronics)

WITH 3-STATE OUTPUTS (NON INVERTED)

■ HIGH SPEED:

t

= 4.5 ns (TYP.) at VCC=5V

PD

■ LOW POWER DISSIPATION:

I

=8µA (MAX.) at TA=25°C

CC

■ HIGH NOISE IMMUNITY:

V

NIH=VNIL

■ POWER DOWN PROTECTION ON INPUTS

■ SYMMETRICAL OUTPUT IMPEDANCE:

|I

|=IOL=24mA(MIN)

OH

■ BALANCED PROPAGATION DELAYS:

t

≅ t

PLH

■ OPERATING VOLTAGE RANGE:

V

(OPR) = 2V to 6V

CC

■ PIN AND FUNCTION COMPATIBLE WITH

74 SERIES 16244

■ IMPROVED LATCH-UP IMMUNITY

DESCRIPTION

The 74AC16244 is an advanced high-speed
CMOS 16-BIT BUS BUFFER (3-STATE) fabricat­ed with sub-micron silicon gate and double-layer
metal wiring C
Any nG
BUFFERS. Output Enable inputs (nG
together give full 16 bit operation.
When nG
nG

is HIGH, the output are in high impedance
state.
The device is designed to be used with 3-state
memory address drivers, etc.

= 28% VCC(MIN.)

PHL

2

MOS tecnology.

output con trol governs four BUS

)tied

is LO W, the outputs are enabled. When

74AC16244

16-BIT BUS BUFFER

TSSOP

ORDER CODES

PACKAGE TUBE T & R

TSSOP 74AC16244TTR

PIN CO NNECTION

1/9February 2003

74AC16244

INPUT AND OUTP UT EQUIVALENT CIRCUIT

PIN DESCRIPTION

PIN No SYMBOL NAME AND FUNCTION

11G

2, 3, 5, 6 1Y1 to 1Y4 Data Outputs

8, 9, 11, 12 2Y1 to 2Y4 Data Outputs
13, 14, 16, 17 3Y1 to 3Y4 Data Outputs
19, 20, 22, 23 4Y1 to 4Y4 Data Outputs

24 4G

25 3G
30, 29, 27, 26 4A1 to 4A4 Data Outputs
36, 35, 33, 32 3A1 to 3A4 Data Outputs
41, 40, 38, 37 2A1 to 2A4 Data Outputs
47, 46, 44, 43 1A1 to 1A4 Data Outputs

48 2G
4, 10, 15, 21,

28, 34, 39, 45

7, 18, 31, 42

GND Ground (0V)

V

CC

Output Enable Input

Output Enable Input
Output Enable Input

Output Enable Input

Positive Supply Voltage

TRUTH TABLE

INPUTS OUTPUT

G

LLL
LHH

HXZ

X : Don’t Care
Z : High Impedance

An Yn

IEC LOGIC SYMBOLS

2/9

74AC16244

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V

V

V

I

I

OK

I

or I

I

CC

T

T

Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied

RECOMMENDED OPERATING CONDITIONS

Symbol Parameter Value Unit

V

V

V

T

dt/dv Input Rise and Fall Time (note 1) V

1) VINfrom30% to 70%of V

Supply Voltage

CC

DC Input Voltage

I

DC Output Voltage -0.5 to VCC+ 0.5

O

DC Input Diode Current

IK

DC Output Diode Current
DC Output Current

O

DC VCCor Ground Current

GND

Storage Temperature

stg

Lead Temperature (10 sec)

L

Supply Voltage

CC

Input Voltage 0 to V

I

Output Voltage 0 to V

O

Operating Temperature

op

= 3.0, 4.5 or 5.5

CC

CC

-0.5 to +7.0 V

-0.5 to +7.0 V

± 20 mA
± 50 mA
± 50 mA

± 400 mA

-65 to +150 °C
300 °C

2to6 V

CC
CC

-55 to 125 °C
0 to 8 ns/V

V

V
V

3/9

74AC16244

DC SPECIFICATIONS

Symbol Parameter

V

V

V

I

High Level Input

IH

Voltage

V

Low Level Input

IL

Voltage

High Level Output

OH

Voltage

Low Level Output

OL

Voltage

Input Leakage

I

I

Current
High Impedance

I

OZ

Output Leakage
Current

Quiescent Supply

CC

Current

Test Condition Value

=25°C

T

V

CC

(V)

3.0

5.5 3.85 2.75 3.85 3.85

3.0

5.5 2.75 1.65 1.65 1.65

3.0

4.5

5.5

3.0

4.5

5.5

3.0

4.5

5.5

3.0

4.5

5.5

5.5

5.5

= 0.1 V or

V

O

V

-0.1V

CC

V

= 0.1 V or

O

V

-0.1V

CC

IO=-50 µA

=-50 µA

I

O

=-50 µA

I

O

=-12 mA

I

O

=-24 mA

I

O

=-24 mA

I

O

IO=50 µA

=50 µA

I

O

I

=50 µA

O

=12 mA

I

O

=24 mA

I

O

I=VIH

or GND

or V

IL

V

I=VCC

V

VO=VCCor GND

V

I=VCC

or GND

A

Min. Typ. Max. Min. Max. Min. Max.

2.1 1.5 2.1 2.1

1.5 0.9 0.9 0.9

2.9 2.99 2.9 2.9

4.4 4.49 4.4 4.4

5.4 5.49 5.4 5.4

2.56 2.46 2.46

3.86 3.76 3.76

4.86 4.76 4.76

0.002 0.1 0.1 0.1

0.001 0.1 0.1 0.1

0.001 0.1 0.1 0.1

-40 to 85°C -55 to 125°C

0.36 0.44 0.44

0.36 0.44 0.44

± 0.1 ± 1 ± 1 µA

± 0.5 ± 5 ± 5 µA

88080µA

Unit

V4.5 3.15 2.25 3.15 3.15

V4.5 2.25 1.35 1.35 1.35

V

V

AC ELECTRICAL C HARACTERISTICS (C

Test Condition Value

Symbol Parameter

t

PLHtPHL

Propagation Delay
Time
AtoY

t

PZLtPZH

t

PLZtPHZ

(*) Voltagerange is3.3V ± 0.3V
(**) Voltage range is 5.0V ± 0.5V

Output Enable
Time

Output Disable
Time

4/9

3.3

5.0

3.3

5.0

3.3

5.0

V

(V)

CC

(*)

(**)

(*)

(**)

(*)

(**)

C

(pF)

L

=50pF,RL= 500 Ω, Input tr=tf= 3n)

L

= 25°C

T

A

-40 to 85°C -55 to 125°C

Min. Typ. Max. Min. Max. Min. Max.

6 8.5 11.5 11.5

4.5 7.0 9.0 9.0
8 10.5 14.0 14.0

5.5 8.0 10.0 10.0

7.3 9.0 11.5 11.5

5.5 8.0 14.0 14.0

Unit

ns

ns

ns

74AC16244

CAPACITIVE CHARACTERISTICS

Test Condition Value

= 25°C

Symbol Parameter

C

C

C

Input Capacitance

IN

Output

OUT

Capacitance
Power Dissipation

PD

Capacitance

V

(V)

5.0

CC

= 10MHz

f

IN

T

A

Min. Typ. Max. Min. Max. Min. Max.

710 10 10pF

14 pF

25 pF

(note 1)

1) CPDis defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without
load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. I
Latch)

TEST CIRCUIT

-40 to 85°C -55 to 125°C

CC(opr)=CPDxVCCxfIN+ICC

Unit

/16(per

TEST SWITCH

t

PLH,tPHL

t

PZL,tPLZ

t

PZH,tPHZ

CL= 50 pF or equivalent (includes jig and probe capacitance)

=R1=500Ω or equivalent

R

L

R

T=ZOUT

of pulse generator (typically 50Ω)

Open

V

CC

GND

5/9

74AC16244

WAVEFORM 1: PROPAG ATION DELAYS (f=1MHz; 50% duty cycle)

WAVEFORM 2: OUTPUT ENABLE AND D ISABLE TIME (f=1MHz; 50% duty cycle)

6/9

74AC16244

TSSOP48 MECHANICAL DATA

mm. inch

DIM.

MIN. TYP MAX. MIN. TYP. MAX.

A 1.2 0.047

A1 0.05 0.15 0.002 0.006

A2 0.9 0.035

b 0.17 0.27 0.0067 0.011

c 0.09 0.20 0.0035 0.0079

D 12.4 12.6 0.488 0.496

E 8.1 BSC 0.318 BSC

E1 6.0 6.2 0.236 0.244

e 0 .5 BSC 0.0197 BSC

K0˚ 8˚0˚ 8˚

L 0.50 0.75 0.020 0.030

A2

A

A1

b

e

D

K

c

E1

L

E

PIN 1 IDENTIFICATION

1

7065588C

7/9

74AC16244

Tape & Reel TSSOP48 MECHANICAL DATA

mm. inch

DIM.

MIN. TYP MAX. MIN. TYP. MAX.

A 330 12.992
C 12.8 13.2 0.504 0.519
D 20.2 0.795
N 60 2.362

T 30.4 1.197
Ao 8.7 8.9 0.343 0.350
Bo 13.1 13.3 0.516 0.524
Ko 1.5 1.7 0.059 0.067
Po 3.9 4.1 0.153 0.161

P 11.9 12.1 0.468 0.476

8/9

74AC16244

Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the
consequences of use o f suc h inf ormat ion n or f or an y infr ingeme nt of paten ts or oth er ri gh ts of third part ies whic h may resul t f rom
its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications
mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information
previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or
systems without express written approval of STMicroelectronics.

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