74VHC125TTR Datasheet 74VHC125TTR | P1-P3

1/12November 2004

■ HIGH SPEED: t

PD

= 3.8ns (TYP.) at V

CC

= 5V

■ LOW POWER DISSIPATION:

I

CC

= 4 µA (MAX.) at T

A

=25°C

■ HIGH NOISE IMMUNITY:

V

NIH

= V

NIL

= 28% V

CC

(MIN.)

■ POWER DOWN PROTECTION ON INPUTS

■ SYMMETRICAL OUTPUT IMPEDANCE:

|I

OH

| = I

OL

= 8mA (MIN)

■ BALANCED PROPAGATION DELAYS:

t

PLH

≅ t

PHL

■ OPERATING VOLTAGE RANGE:

V

CC

(OPR) = 2V to 5.5V

■ PIN AND FUNCTION COMPATIBLE WITH

74 SERIES 125

■ IMPROVED LATCH-UP IMMUNITY

■ LOW NOISE: V

OLP

= 0.8V (MAX.)

DESCRIPTION

The 74VHC125 is an advanced high-speed

CMOS QUAD BUS BUFFERS fabricated with

sub-micron silicon gate and double-layer metal

wiring C

2

MOS technology.

The device requires the 3-STATE control input G

to be set high to place the output in to the high

impedance state.

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, giving

them 2KV ESD immunity and transient excess

voltage.

74VHC125

QUAD BUS BUFFERS (3-STATE)

Figure 1: Pin Connection And IEC Logic Symbols

Table 1: Order Codes

PACKAGE T & R

SOP 74VHC125MTR

TSSOP 74VHC125TTR

TSSOPSOP

Rev. 7

74VHC125

2/12

Figure 2: Input Equivalent Circuit Table 2: Pin Description

Table 3: Truth Table

X : Don‘t Care

Z : High Impedance

Table 4: Absolute Maximum Ratings

Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is

not implied

Table 5: Recommended Operating Conditions

1) V

IN

from 30% to 70% of V

CC

PIN N° SYMBOL NAME AND FUNCTION

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

AG

Y

XHZ

LLL

HLH

Symbol Parameter Value Unit

V

CC

Supply Voltage

-0.5 to +7.0 V

V

I

DC Input Voltage

-0.5 to +7.0 V

V

O

DC Output Voltage -0.5 to V

CC

+ 0.5

V

I

IK

DC Input Diode Current

- 20 mA

I

OK

DC Output Diode Current

± 20 mA

I

O

DC Output Current

± 25 mA

I

CC

or I

GND

DC V

CC

or Ground Current

± 50 mA

T

stg

Storage Temperature

-65 to +150 °C

T

L

Lead Temperature (10 sec)

300 °C

Symbol Parameter Value Unit

V

CC

Supply Voltage

2 to 5.5 V

V

I

Input Voltage

0 to 5.5 V

V

O

Output Voltage 0 to V

CC

V

T

op

Operating Temperature

-55 to 125 °C

dt/dv

Input Rise and Fall Time (note 1) (V

CC

= 3.3 ± 0.3V)

(V

CC

= 5.0 ± 0.5V)

0 to 100

0 to 20

ns/V

74VHC125

3/12

Table 6: DC Specifications

Table 7: AC Electrical Characteristics (Input t

r

= t

f

= 3ns)

(*) Voltage range is 3.3V ± 0.3V

(**) Voltage range is 5.0V ±

0.5V

Symbol Parameter

Test Condition Value

Unit

V

CC

(V)

T

A

= 25°C

-40 to 85°C -55 to 125°C

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

V

IH

High Level Input

Voltage

2.0 1.5 1.5 1.5

V

3.0 to

5.5

0.7V

CC

0.7V

CC

0.7V

CC

V

IL

Low Level Input

Voltage

2.0 0.5 0.5 0.5

V

3.0 to

5.5

0.3V

CC

0.3V

CC

0.3V

CC

V

OH

High Level Output

Voltage

2.0

I

O

=-50 µA

1.9 2.0 1.9 1.9

V

3.0

I

O

=-50 µA

2.9 3.0 2.9 2.9

4.5

I

O

=-50 µA

4.4 4.5 4.4 4.4

3.0

I

O

=-4 mA

2.58 2.48 2.4

4.5

I

O

=-8 mA

3.94 3.8 3.7

V

OL

Low Level Output

Voltage

2.0

I

O

=50 µA

0.0 0.1 0.1 0.1

V

3.0

I

O

=50 µA

0.0 0.1 0.1 0.1

4.5

I

O

=50 µA

0.0 0.1 0.1 0.1

3.0

I

O

=4 mA

0.36 0.44 0.55

4.5

I

O

=8 mA

0.36 0.44 0.55

I

OZ

High Impedance

Output Leakage

Current

5.5

V

I

= V

IH

or V

IL

V

O

= V

CC

or GND

±0.25 ± 2.5 ± 2.5 µA

I

Input Leakage

Current

0 to

5.5

V

I

= 5.5V or GND

± 0.1 ± 1 ± 1 µA

I

CC

Quiescent Supply

Current

5.5

V

I

= V

CC

or GND

44040µA

Symbol Parameter

Test Condition Value

Unit

V

CC

(V)

C

L

(pF)

T

A

= 25°C

-40 to 85°C -55 to 125°C

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

t

PLH

t

PHL

Propagation Delay

Time

3.3

(*)

15 5.6 8.0 1.0 9.5 1.0 9.5

ns

3.3

(*)

50 8.1 11.5 1.0 13.0 1.0 13.0

5.0

(**)

15 3.8 5.5 1.0 6.5 1.0 6.5

5.0

(**)

50 5.3 7.5 1.0 8.5 1.0 8.5

t

PLZ

t

PHZ

Output Disable

Time

3.3

(*)

15

R

L

= 1 KΩ

5.4 8.0 1.0 9.5 1.0 9.5

ns

3.3

(*)

50

R

L

= 1 KΩ

7.9 11.5 1.0 13.0 1.0 13.0

5.0

(**)

15

R

L

= 1 KΩ

3.6 5.1 1.0 6.0 1.0 6.0

5.0

(**)

50

R

L

= 1 KΩ

5.1 7.1 1.0 8.0 1.0 8.0

t

PZL

t

PZH

Output Enable

Time

3.3

(*)

50

R

L

= 1 KΩ

9.5 13.2 1.0 15.0 1.0 15.0

ns

5.0

(**)

50

R

L

= 1 KΩ

6.1 8.8 1.0 10.0 1.0 10.0

74VHC125TTR

74VHC125TTR

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