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HC125中文资料

74VHC125

QUAD BUS BUFFERS (3-STATE)

PRELIMINARY DATA

June 1999PIN CONNECTION AND IEC LOGIC SYMBOLS

s HIGH SPEED:t PD =3.8ns (TYP.)at V CC =5V s

LOW POWER DISSIPATION:I CC =4μA (MAX.)at T A =25o C s

HIGH NOISE IMMUNITY:V NIH =V NIL =28%V CC (MIN.)

s POWER DOWN PROTECTION ON INPUTS s

SYMMETRICAL OUTPUT IMPEDANCE:|I OH |=I OL =8mA (MIN)

BALANCED PROPAGATION DELAYS:t PLH ?t PHL

OPERATING VOLTAGERANGE:V CC (OPR)=2V to 5.5V

PIN AND FUNCTION COMPATIBLE WITH 74SERIES 125

s IMPROVED LATCH-UP IMMUNITY s

LOW NOISE:V OLP =0.8V(Max.)

DESCRIPTION

The 74VHC125is an advanced high-speed CMOS QUAD BUS BUFFERS fabricated with sub-micron silicon gate and double-layer metal wiring C 2MOS technology.

This device requires the 3-STATE control input G

to be set high to place the output into the high impedance state.

Power down protection is provided on all inputs and 0to 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.

ORDER CODES :

74VHC125M 74VHC125T

(Micro Package)T

(TSSOP Package)

1/8

TRUTH TABLE

A G Y X H Z L L L H

X:”H”or ”L”

Z:High Impedance

PIN DESCRIPTION

PIN No SYMBOL NAME AND FUNCTION 1,4,10,131G to 4G Output Enable Inputs 2,5,9,121A to 4A Data Inputs 3,6,8,11

1Y to 4Y Data Outputs 7GND Ground (0V)

V CC

Positive Supply Voltage

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter

Value Unit V CC Supply Voltage -0.5to +7.0V V I DC Input Voltage -0.5to +7.0V V O DC Output Voltage -0.5to V CC +0.5

V I IK DC Input Diode Current -20mA I OK DC Output Diode Current ±20mA I O DC Output Current ±25mA I CC or I GND DC V CC or Ground Current

±50mA

T stg Storage Temperature -65to +150

o C T L

Lead Temperature (10sec)

300

Absolute Maximum Ratingsarethose values beyond which dam age to the device may occur.Functional operation un der these condition is not implied.

RECOMMENDED OPERATING CONDITIONS

Symbol Parameter

Value Unit V CC Supply Voltage 2.0to 5.5V V I Input Voltage 0to 5.5V V O Output Voltage 0to V CC V

T op Operating Temperature

-40to +85o

dt/dv

Input Rise and Fall Time (see note 1)(V CC =3.3±0.3V)

(V CC =5.0±0.5V)

0to 1000to 20

ns/V ns/V

1)V IN from 30%to70%of V CC

INPUT EQUIVALENT CIRCUIT

74VHC125

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DC SPECIFICATIONS

Symbol

Parameter

Test Conditions Value

Unit

V CC (V)

T A =25o

C -40to 85o

C Min.Typ.

Max.

Min.Max.

V IH High Level Input Voltage 2.0 1.5 1.5V 3.0to 5.50.7V CC

0.7V CC

V IL Low Level Input Voltage

2.00.50.5V

3.0to 5.50.3V CC

0.3V CC V OH

High Level Output Voltage

2.0I O =-50μA 1.9 2.0 1.9V

3.0I O =-50μA 2.9 3.0 2.9

4.5I O =-50μA 4.4 4.5

4.43.0I O =-4mA 2.58 2.484.5

I O =-8mA 3.94

3.8

V OL

Low Level Output Voltage

2.0I O =50μA 0.00.10.1V

3.0I O =50μA 0.00.10.1

4.5I O =50μA 0.0

0.10.13.0I O =4mA 0.360.444.5

I O =8mA 0.360.44I OZ

High Impedance Output Leakage Current

5.5V I =V IH or V IL V O =V CC or GND ±0.25

±2.5

μA

I I Input Leakage Current 0to 5.5V I =5.5V or GND ±0.1±1.0μA I CC

Quiescent Supply Current

5.5

V I =V CC or GND

μA

AC ELECTRICAL CHARACTERISTICS (Input t r =t f =3ns)

Symbol

Parameter

Test Condition Value

Unit

V CC (V)C L (pF)T A =25o

-40to 85o

Min.Typ.Max.

Min.Max.t PLH t PHL Propagation Delay Time

3.3(*)15 5.68.0

1.09.5ns

3.3(*)

508.111.5 1.013.05.0(**)15 3.8 5.5 1.0 6.55.0(**)50 5.37.5 1.08.5t PLZ t PHZ

Output Disable Time

3.3(*)15R L =1K ? 5.48.0 1.09.5ns

3.3(*)50R L =1K ?7.911.5 1.013.05.0(**)15R L =1K ? 3.6 5.1 1.0 6.05.0(**)50R L =1K ? 5.17.1 1.08.0t PZL t PZH

Output Enable Time

3.3(*)50R L =1K ?9.513.2 1.015.0ns

5.0(**)

R L =

1K ?

6.1

8.8

1.0

10.0

(*)Voltag e range is 3.3V ±0.3V (**)Voltage range is 5V ±0.5V

74VHC125

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CAPACITIVE CHARACTERISTICS

Symbol

Parameter

Test Conditions

Value

Unit

T A =25o

C -40to 85o

C Min.

Typ.Max.Min.

Max.C IN Input Capacitance 410

pF C OUT Output Capacitance 6pF C PD

Power Dissipation Capacitance (note 1)

1)C PD isdefined as the value of the IC’sinternal equiva lent capacitance which is calculated fromthe operating current consumption without load.(Referto Test Circuit).Average operting curren t can be obtained bythe followingequa tion.I CC (opr)=C PD ?V CC ?f IN +I CC /4(per circuit)

TEST CIRCUIT

TEST

SWITCH t PLH ,t PHL Open t PZL ,t PLZ V CC t PZH ,t PHZ

GND

C L =15/50pF or equ ivalent (includes jigand probe capacitance)R L =R 1=1K ?orequivalent

R T =Z OU T of pulse generator (typ ically 50?)

DYNAMIC SWITCHING CHARACTERISTICS

Symbol

Parameter

Test Conditions Value

Unit

V CC (V)

T A =25o

C -40to 85o

C Min.

Typ.Max.Min.

Max.

V OLP Dynamic Low Voltage Quiet Output (note 1,2) 5.0

C L =50pF

0.30.8

V OLV -0.8

-0.3

V IHD Dynamic High Voltage Input (note 1,3) 5.0 3.5

V ILD

Dynamic Low Voltage Input (note 1,3)

5.0

1.5

1)Worst case package.

2)Max num ber of outputs defined as (n).Data inputs aredriven 0V to 5.0V,(n -1)outputs switching and one out put at GND.

3)Max num ber of data inputs (n)switching.(n-1)switching 0V to5.0V.Inputs under test switching:5.0V to threshold (V ILD ),0V to threshold (V IHD ),f=1MHz.

74VHC125

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74VHC125 WAVEFORM1:PROPAGATION DELAYS(f=1MHz;50%duty cycle)

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

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DIM.

mm inch MIN.

TYP.

MAX.MIN.

TYP.

MAX.A 1.750.068a10.1

0.20.0030.007a2 1.650.064b 0.350.460.0130.018b10.19

0.25

0.007

0.010

C 0.5

0.019

c145(typ.)

D 8.558.750.3360.344

E 5.8

6.2

0.228

0.244

e 1.270.050e37.62

0.300

F 3.8 4.00.1490.157

G 4.6 5.30.1810.208L 0.5 1.270.019

0.050M 0.68

0.026S

8(max.)

P013G

SO-14MECHANICAL DATA

74VHC125

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DIM.

inch MIN.

TYP.

MAX.MIN.

TYP.

MAX.A 1.10.433A10.050.100.150.0020.0040.006A20.850.90.950.3350.354

0.374b 0.190.300.00750.0118c 0.090.200.00350.0079D 4.95 5.10.1930.1970.201E 6.25 6.4 6.50.2460.2520.256E1 4.3

4.4 4.48

0.169

0.1730.176

e 0.65BSC

0.0256BSC

K 0o 4o 8o 0o 4o 8o L

0.500.60

0.70

0.020

0.024

0.028

PIN 1IDENTIFICATION

TSSOP14MECHANICAL DATA

74VHC125

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74VHC125

Information furnished is believed to be accurate and reliable.However,STMicroelectronics assumes no responsibility for the consequence s of use of such information nor for any infringement of patents or other rights of third parties which may result from its use.No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics.Specification 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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