Datasheet 74LX1G125 Datasheet (ST)

■ 5V TOLERANTINPUTS

■ HIGH SPEED:t

■ LOW POWER DISSIPATION:

= 4.5ns (MAX.) at VCC=3V

PD

ICC=1µA (MAX.) at TA=25°C

■ POWER DOWN PROTECTION ON INPUTS

AND OUTPUTS

■ SYMMETRICAL OUTPUT IMPEDANCE:

|IOH|=IOL= 24mA(MIN) atVCC=3V

■ BALANCED PROPAGATION DELAYS:

t

≅ t

PLH

PHL

■ OPERATING VOLTAGE RANGE:

VCC(OPR) = 1.65V to 5.5V
(1.2V Data Retention)

■ IMPROVED LATCH-UP IMMUNITY

74LX1G125

SINGLE BUS BUFFER (3-STATE)

SOT323-5LSOT23-5L

ORDER CODES

PACKAGE T & R

SOT23-5L 74LX1G125STR

SOT323-5L 74LX1G125CTR

DESCRIPTION

The 74LX1G125 is a low voltage CMOS SINGLE
BUS BUFFER fabricated with sub-micron silicon
gate and double-layer metal wiring C2MOS
technology.
3-STATE control input G has to be set HIGH to
place the output into the high impedance state.

PIN CONNECTION AND IEC LOGIC SYMBOLS

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.

1/12January 2002

74LX1G125

INPUT EQUIVALENT CIRCUIT

PIN DESCRIPTION TRUTH TABLE

PIN No SYMBOL NAME AND FUNCTION

1 1G Output Enable Input
2 1A Data Input
4 1Y Data Output
3 GND Ground (0V)
5

V

CC

Positive Supply Voltage

X : Don’t Care
Z : High Impedance

AGY

XHZ

LLL

HLH

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V

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

absolute maximum rating must be observed

1) I

O

2) V

< GND, VO>V

O

Supply Voltage

CC

DC Input Voltage

I

DC Output Voltage (VCC= 0V)

O

DC Output Voltage (High or LowState) (note 1) -0.5 to VCC+ 0.5

O

DC Input Diode Current

IK

DC Output Diode Current (note 2)
DC Output Current

O

DC VCCor Ground Current per Supply Pin

GND

Storage Temperature

stg

Lead Temperature (10 sec)

L

CC

-0.5 to+7.0 V

-0.5 to+7.0 V

-0.5 to+7.0 V
V

-50 mA

-50 mA

± 50 mA
± 50 mA

-65 to +150 °C

300 °C

2/12

74LX1G125

RECOMMENDED OPERATING CONDITIONS

Symbol Parameter Value Unit

V

V
V
V

I

OH,IOL

I

OH,IOL

I

OH,IOL

I

OH,IOL

I

OH,IOL

T

dt/dv Input Rise and Fall Time (note 2) 0 to 10 ns/V

1) Truth Table guaranteed: 1.2V to3.6V
from 0.8V to2V at VCC= 3.0V

2) V

IN

Supply Voltage (note 1)

CC

Input Voltage

I

Output Voltage (VCC= 0V)

O

Output Voltage (High or Low State) 0 to V

O

High or Low Level Output Current (VCC= 4.5 to 5.5V)
High or Low Level Output Current (VCC= 3.0 to 3.6V)
High or Low Level Output Current (VCC= 2.7 to 3.0V)
High or Low Level Output Current (VCC= 2.3 to 2.7V)
High or Low Level Output Current (VCC= 1.65 to 2.3V)
Operating Temperqture

op

1.65 to 5.5 V
0 to 5.5 V
0 to 5.5 V

CC

± 32 mA
± 24 mA
± 12 mA

± 8mA
± 4mA

-55 to 125 °C

V

3/12

74LX1G125

DC SPECIFICATIONS

Test Condition Value

Symbol Parameter

V

High Level Input

IH

Voltage

V

Low Level Input

IL

Voltage

V

V

High Level Output

OH

Voltage

Low Level Output

OL

Voltage

High Impedance

I

OZ

Output Leakage
Current

Input Leakage

I

I

Current
Power Off Leakage

I

off

Current
Quiescent Supply

I

CC

Current

V

CC

(V)

1.65 to 1.95

3.0 to 5.5

1.65 to 1.95

3.0 to 5.5

1.65 to 3.6

1.65

2.3

2.7

3.0

4.5

1.65 to 3.6

1.65

2.3

2.7

3.0

4.5

3.6

1.65 to 5.5

0

1.65 to 5.5

3.6

-40 to 85 °C -55 to 125 °C

Min. Max. Min. Max.

0.75V

CC

0.7V

CC

0.7V

CC

0.25V

CC

0.3V

CC

0.3V

CC

IO=-100 µAVCC-0.1 VCC-0.1

I

=-4 mA

O

I

=-8 mA

O

=-12 mA

I

O

=-16 mA

I

O

=-24 mA

I

O

=-32 mA

I

O

I

=100 µA

O

I

=4 mA

O

=8 mA

I

O

=12 mA

I

O

=24 mA

I

O

I

=32 mA

O

V

= 0 to 5.5V

I

V

= 0 to 5.5V

I

V

or VO= 5.5V

I

VI=VCCor GND

V

or VO= 3.6 to 5.5V

I

1.2 1.9

1.9 2.2

2.2 2.2

2.4 2.4

2.2 2.2

3.8 3.8

0.1 0.1

0.45 0.45

0.3 0.3

0.4 0.4

0.55 0.55

0.55 0.55

± 10 ± 10 µA

± 10 ± 10 µA

10 10 µA
10 10

± 10 ± 10

0.75V

0.7V

0.7V

CC
CC

CC

0.25V

0.3V

0.3V

CC
CC

Unit

V2.3 to 2.7

CC

V2.3 to 2.7

V

V

µA

4/12

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

Test Condition Value

74LX1G125

Symbol Parameter

t

PLHtPHL

t

PLZtPHZ

t

PZLtPZH

Propagation Delay
Time

Output Disable Time 1.65 to 1.95

Output Enable Time 1.65 to 1.95

V

(V)

CC

C

(pF)

R

L

(Ω)

= t

t

L

s

(ns)

1.65 to 1.95

2.3 to 2.7 2 7.0 2 7.0

3.0 to 3.6 1 4.7 1 4.7

15 1MΩ 3.0

-40 to 85 °C -55 to 125 °C

r

Min. Max. Min. Max.

2 12.0 2 12.0

4.5 to 5.5 1 4.1 1 4.1

1.65 to 1.95 30 1000 2.0 2 8.0 2 8.0

2.3 to 2.7 30 500 2.0 2 5.5 2 5.5

2.7 50 500 2.5 1 5.2 1 5.2

3.0 to 3.6 50 500 2.5 1 4.5 1 4.5

4.5 to 5.5 50 500 2.5 1 4.0 1 4.0
2 12.0 2 12.0

2.3 to 2.7 2 7.0 2 7.0

3.0 to 3.6 1 5.5 1 5.5

15 1MΩ 3.0

4.5 to 5.5 1 5.0 1 5.0

1.65 to 1.95 30 1000 2.0 2 9.2 2 9.2

2.3 to 2.7 30 500 2.0 2 5.5 2 5.5

2.7 50 500 2.5 1 5.2 1 5.2

3.0 to 3.6 50 500 2.5 1 5.0 1 5.0

4.5 to 5.5 50 500 2.5 1 4.2 1 4.2
2 12.0 2 12.0

2.3 to 2.7 2 7.0 2 7.0

3.0 to 3.6 1 6.0 1 6.0

15 1MΩ 3.0

4.5 to 5.5 1 5.5 1 5.5

1.65 to 1.95 30 1000 2.0 2 9.4 2 9.4

2.3 to 2.7 30 500 2.0 2 6.6 2 6.6

2.7 50 500 2.5 1 5.6 1 5.6

3.0 to 3.6 50 500 2.5 1 5.3 1 5.3

4.5 to 5.5 50 500 2.5 1 5.0 1 5.0

Unit

ns

ns

ns

CAPACITIVE CHARACTERISTICS

Test Condition Value

=25°C

Symbol Parameter

V

CC

(V)

C

C

OUT

C

Input Capacitance VIN= 0 or V

IN

Output Capacitance VIN= 0 or V
Power Dissipation Capacitance

PD

(note 1)

1.8 fIN= 10MHz 18

CC
CC

3.3 21

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

T

A

Min. Typ. Max.

4pF
510pF

CC(opr)=CPDxVCCxfIN+ICC

Unit

pF2.5 18

5/12

74LX1G125

TEST CIRCUIT

RT=Z

of pulse generator (typically 50Ω)

OUT

TEST CIRCUIT AND WAVEFORM SYMBOL VALUE

V

Symbol

CC

1.65 to 1.95V 2.3 to 2.7V 2.7 to 5.5V

R

t

C

L

L=R1

V

IH

V

M

r=tr

15pF/30pF 15pF/30pF 15pF/50pF

1MΩ/1000Ω 1MΩ/500Ω 1MΩ/500Ω

V

CC

V

CC

VCC/2 VCC/2 VCC/2

<2.0ns <2.0ns <2.5ns

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

V

CC

6/12

WAVEFORM 2: OUTPUT ENABLE AND DISABLE TIME (f=1MHz; 50% dutycycle)

74LX1G125

7/12

74LX1G125

SOT23-5L MECHANICAL DATA

mm. mils

DIM.

MIN. TYP MAX. MIN. TYP. MAX.

A 0.90 1.45 35.4 57.1

A1 0.00 0.15 0.0 5.9

A2 0.90 1.30 35.4 51.2

b 0.35 0.50 13.7 19.7

C 0.09 0.20 3.5 7.8

D 2.80 3.00 110.2 118.1

E 2.60 3.00 102.3 118.1

E1 1.50 1.75 59.0 68.8

e 0.95 37.4

e1 1.9 74.8

L 0.35 0.55 13.7 21.6

8/12

74LX1G125

SOT323-5L MECHANICAL DATA

mm. mils

DIM.

MIN. TYP MAX. MIN. TYP. MAX.

A 0.80 1.10 31.5 43.3

A1 0.00 0.10 0.0 3.9

A2 0.80 1.00 31.5 39.4

b 0.15 0.30 5.9 11.8

C 0.10 0.18 3.9 7.1

D 1.80 2.20 70.9 86.6

E 1.80 2.40 70.9 94.5

E1 1.15 1.35 45.3 53.1

e 0.65 25.6

e1 1.3 51.2

L 0.10 0.30 3.9 11.8

9/12

74LX1G125

Tape & Reel SOT23-xL MECHANICAL DATA

DIM.

MIN. TYP MAX. MIN. TYP. MAX.

A 180 7.086
C 12.8 13.0 13.2 0.504 0.512 0.519
D 20.2 0.795
N 60 2.362

T 14.4 0.567
Ao 3.13 3.23 3.33 0.123 0.127 0.131
Bo 3.07 3.17 3.27 0.120 0.124 0.128
Ko 1.27 1.37 1.47 0.050 0.054 0.0.58
Po 3.9 4.0 4.1 0.153 0.157 0.161

P 3.9 4.0 4.1 0.153 0.157 0.161

mm. inch

10/12

Tape & Reel SOT323-xL MECHANICAL DATA

74LX1G125

DIM.

MIN. TYP MAX. MIN. TYP. MAX.

A 175 180 185 6.889 7.086 7.283
C 12.8 13 13.2 0.504 0.512 0.519
D 20.2 0.795
N 59.5 60 60.5 2.362

T 14.4 0.567

Ao 2.25 0.088
Bo 2.7 0.106
Ko 1.2 0.047
Po 3.98 4 4.2 0.156 0.157 0.165

P 3.98 4 4.2 0.156 0.157 0.165

mm. inch

11/12

74LX1G125

Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the
consequences of useofsuch informationnor for any infringementof patents or other rights ofthird parties which may result from
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.

Australia - Brazil - Canada - China - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco

 TheST logo is a registered trademark of STMicroelectronics

 2002 STMicroelectronics - Printed in Italy - All Rights Reserved

STMicroelectronics GROUP OF COMPANIES

Singapore - Spain - Sweden - Switzerland - United Kingdom - United States.

 http://www.st.com

12/12