74LVX245MSCX - Fairchild Semiconductor

April 1993

Revised March 1999

74LVX245 Low Voltage Octal Bidirectional Transceiver

74LVX245

Low Voltage Octal Bidirectional Transceiver

General Descript ion

The LVX245 contains eigh t non-in vert ing bi direction al bu ff-

ers and is intended for bus-oriented applications. The

Transmit/Receive (T/R) input determines the direction of

data flow through the bidirectional transceiver. Transmit

(active-HIGH) enables data from A Ports to B Ports;

Receive (active-LOW) enables data from B Ports to A

Ports. T he O utp ut En ab le inp ut, w he n HIG H , d isabl e s bo th

A and B P orts b y placi ng them in a hig h im pedan ce condi-

tion.

Features

■Ideal for low power/low noise 3.3V applications

■Guaranteed simultaneous switching noise level and

dynamic threshold performance

Ordering Code

Devices also available in Tape and Reel. S pecify by append ing the suffix let t er “X” to the o rdering c ode.

Logic Symbols

Pin Descriptions

Connection Diagram

Truth Table

H = HIGH Voltage Level

L = LOW Voltage Level

X = Immaterial

Order Number Package Number Package Description

74LVX245M M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide

74LVX245SJ M20D 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide

74LVX245MTC MTC20 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide

Pin Description

Names

OE Output Enable Input

T/R Transmit/Receive Input

A0–A7Side A Inputs or 3-STATE Outputs

B0–B7Side B Inputs or 3-STATE Outputs

Inputs Outputs

OE T/R

L L Bus B Data to Bus A

L H Bus A Data to Bus B

H X HIGH-Z State

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74LVX245

Absolute Maximum Ratings(No te 1) Recommended Operating

Conditions (Note 2)

Note 1: The “A bsolute Max imum Ratin gs” are those valu es beyon d which

the saf ety of the device cannot be guarante ed. The device should not be

operated at these limits. The parametric values defined in the Electrical

Characteristics tables are not guarant eed at the absolute maximum ratin gs.

The “Re comme nded Operat ing Co ndition s” table will define the cond itions

for actu al device operation.

Note 2: Unused inputs must be held HIGH or LOW. They may not float.

DC Electrical Characteristics

Noise Characteristics (Note 3)

Note 3: Input tr = tf = 3 ns

Supply Volt age (VCC)−0.5V to +7.0V

DC Input Diode Current (IIK)

VI = −0.5V −20 mA

DC In put Vo ltage T/R, OE (VI)−0.5V to 7V

DC Diode Current (IOK)

VO = −0.5V −20 mA

VO = VCC + 0.5V +20 mA

DC Bus I/O Voltage (VI/O)−0.5V to VCC + 0.5V

DC Output Source

or Sink Current (IO)±25 mA

DC VCC or Ground Current

(ICC or IGND)±75 mA

Storage Temperature (TSTG)−65°C to +150°C

Power Dissipation 180 mW

Supply Voltage (VCC) 2.0V to 3.6V

Input Voltage T/R, OE (VI)0V to 5.5V

Bus I/O Voltage (VI/O) 0V to VCC

Operating Temper ature (TA)−40°C to +85°C

Input Rise and Fall T ime (∆t/∆V) 0 ns/V to 100 ns/V

Symbol Parameter VCC TA = +25°CT

A = −40°C to +85°CUnits Conditions

Min Typ Max Min Max

VIH HIGH Level 2.0 1.5 1.5

Input 3.0 2.0 2.0 V

Voltage 3.6 2.4 2.4

VIL LOW Level 2.0 0.5 0.5

Input 3.0 0.8 0.8 V

Voltage 3.6 0.8 0.8

VOH HIGH Level 2.0 1.9 2.0 1.9 VIN = VIH or VIL IOH = −50 µA

Output 3.0 2.9 3.0 2.9 V IOH = −50 µA

Voltage 3.0 2.58 2.48 IOH = −4 mA

VOL LOW Level 2.0 0.0 0.1 0.1 VIN = VIH or VIL IOL = 50 µA

Output 3.0 0.0 0.1 0.1 V IOL = 50 µA

Voltage 3.0 0.36 0.44 IOL = 4 mA

IOZ 3-STATE 3.6 ±0.25 ±2.5 µAV

IN = VIH or V IL

Output VOUT = VCC or GND

Off-State Current

IIN Input Leakage Current 3.6 ±0.1 ±1.0 µAV

IN = 5.5V or GND

ICC Quiescent Supply Current 3.6 4.0 40.0 µAV

IN = VCC or GND

Symbol Parameter VCC

(V)

TA = 25°CUnits Conditions

CL (pF)

Typ Limit

VOLP Quiet Output Maximum Dynamic VOL 3.3 0.5 0.8 V 50

VOLV Quiet Output Minimum Dynamic VOL 3.3 −0.5 −0.8 V 50

VIHD Minimum HIGH Level Dynamic Input Voltage 3.3 2.0 V 50

VILD Maximum LOW Level Dynamic Input Voltage 3.3 0.8 V 50

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74LVX245

AC Electrical Characteristics

Note 4: Parame te r guaranteed by des ign. tOSLH = |tPLHm − tPLHn|, tOSHL = |tPHLm − tPHLn|

Capacitance

Note 5: CPD is define d as t he v alue of the int ernal equivale nt c apacitan c e w hic h is calc ulated fro m th e operat ing current co ns umption without load.

Symbol Parameter VCC

(V)

TA = +25°CT

A =−40°C to +85°CUnits Conditions

Min Typ Max Min Max

tPLH Propagation Delay Time 2.7 6.1 10.7 1.0 13.5

CL = 15 pF

tPHL 8.6 14.2 1.0 17.0 CL = 50 pF

3.3 ± 0.3 4.7 6.8 1.0 8.0 CL = 15 pF

7.2 10.1 1.0 11.5 CL = 50 pF

tPZL 3-STATE Output 2.7 9.0 16.9 1.0 20.5

CL = 15 pF, RL = 1 kΩ

tPZH Enable Time 11.5 20.4 1.0 24.0 CL = 50 pF, RL = 1 kΩ

3.3 ± 0.3 7.1 11.0 1.0 13.0 CL = 15 pF, RL = 1 kΩ

9.6 14.5 1.0 16.5 CL = 50 pF, RL = 1 kΩ

tPLZ 3-STATE Output 2.7 11.5 18.0 1.0 21.0 ns CL = 50 pF, RL = 1 kΩ

tPHZ Disable Time 3.3 ± 0.3 9.6 12.8 1.0 14.5 CL = 50 pF, RL = 1 kΩ

tOSLH Output to Output Skew 2.7 1.5 1.5 ns CL = 50 pF (Note 4)

tOSHL (Note 4) 3.3 1.5 1.5

Symbol Parameter TA = +25°CT

A = −40°C to +85°CUnits

Min Typ Max Min Max

CIN Input Capacitance T/R, OE 410 10 pF

CI/O Output Capacitance An, Bn8pF

CPD Power Dissipation Capacitance (Note 5) 21 pF

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74LVX245

Physical Dimensions inches (millimeters) unless otherwise noted

20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide

Package Number M20B

20-Lead Sma ll Outline Packag e (SOP), EIAJ TYPE II, 5. 3mm Wide

Package Number M20D

Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications.

74LVX245 Low Voltage Octal Bidirectional Transceiver

LIFE SUPPORT POLICY

FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT

DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD

SEMICONDUCTOR CORPORATION. As used herein:

1. Life suppor t de vices o r syst ems are devices or syste ms

which, (a) are intended for surgical implant into the

body, or (b) support or sustain life, and (c) whose failure

to perform when properly used in accordance with

instruct ions fo r use pr ovi de d in the labe l ing, can be re a-

sonably expected to result in a significant injury to the

user.

2. A criti cal com ponen t in any compo nent o f a l ife supp ort

device or system whose failure to perform can be rea-

sonabl y e xpec ted to c ause th e fa i lure of the li fe s upp or t

device or system, or to affect its safety or effectiveness.

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Physical Dimensions inches (millimeters) unless otherwise noted (Continued)

20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide

Package Number MTC20