MOTOROLA MC74LVX245DWR2, MC74LVX245DTR2, MC74LVX245DW Datasheet

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SEMICONDUCTOR TECHNICAL DATA

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  

The MC74LVX245 is an advanced high speed CMOS octal bus

transceiver.

It is intended for two–way asynchronous communication between data
buses. The direction of data transmission is determined by the level of the
T/R

input. The output enable pin (OE) can be used to disable the device,

so that the buses are effectively isolated.

All inputs are equipped with protection circuits against static discharge.



LVX

LOW–VOLTAGE CMOS

• High Speed: t

• Low Power Dissipation: I

= 4.7ns (Typ) at VCC = 3.3V

PD

= 4µA (Max) at TA = 25°C

CC

• Power Down Protection Provided on Inputs

• Balanced Propagation Delays

• Low Noise: V

= 0.8V (Max)

OLP

• Pin and Function Compatible with Other Standard Logic Families

• Latchup Performance Exceeds 300mA

• ESD Performance: HBM > 2000V; Machine Model > 200V

APPLICATION NOTES

1. Do not force a signal on an I/O pin when it is an active output, damage may

occur.

2. All floating (high impedence) input or I/O pins must be fixed by means of

pull up or pull down resistors or bus terminator ICs.

3. A parasitic diode is formed between the bus and VCC terminals. Therefore,

the L VX245 cannot be used to interface 5V to 3V systems directly.

V

OE

CC

T/R

B0 B1 B2 B3 B4 B5 B6 B7

1920 18 17 16 15 14

21 34567

A0 A1 A2 A3 A4 A5 A6 A7 GND

Figure 1. 20–Lead Pinout (Top View)

13

12

11

9

8

10

20–LEAD TSSOP PACKAGE

20–LEAD SOIC EIAJ PACKAGE

PIN NAMES

Pins

OE
T/R
A0–A7

B0–B7

DW SUFFIX

20–LEAD SOIC PACKAGE

CASE 751D–04

DT SUFFIX

CASE 948E–02

M SUFFIX

CASE 967–01

Function

Output Enable Input
Transmit/Receive Input
Side A 3–State Inputs or 3–State
Outputs
Side B 3–State Inputs or 3–State
Outputs

6/97

 Motorola, Inc. 1997

1

REV 0

MC74LVX245

OPERATING MODE

OE

T/R 1

19

A0

A1

A2

A3

A4

A5

A6

A7

2

18

B0

3

17

B1

4

16

B2

5

15

B3

6

14

B4

7

13

B5

8

12

B6

9

11

B7

Figure 2. Logic Diagram

INPUTS

OE T/R

L L B Data to A Bus
L H A Data to B Bus

H X Z

H = High Voltage Level; L = Low V oltage Level; Z = High Impedance State; X = High or Low Voltage Level
and Transitions are Acceptable; For ICC reasons, Do Not Float Inputs

MOTOROLA LCX DATA

2

Non–Inverting

BR1339 — REV 3

MC74LVX245

ОООООО

ОООООО

V

CC

Î

Î

ОООООО

Î

Î

Î

Î

Î

ОООООО

Î

Î

Î

Î

Î

Î

Î

ОООООО

Î

Î

Î

Î

Î

Î

Î

Î

Î

Î

Î

Î

Î

Î

Î

Î

ОООООО

Î

Î

Î

Î

Î

Î

Î

ОООООО

Î

Î

Î

Î

ОООООО
ОООООО

MAXIMUM RATINGS*

Symbol

V
V
V
I
I
I
I
P
T

CC
in

I/O
IK
OK
out
CC

D

stg

DC Supply Voltage
DC Input Voltage (T/R, OE)
DC Output Voltage
Input Diode Current
Output Diode Current
DC Output Current, per Pin
DC Supply Current, VCC and GND Pins
Power Dissipation
Storage Temperature

* Absolute maximum continuous ratings are those values beyond which damage to the device may occur. Exposure to these conditions or

conditions beyond those indicated may adversely affect device reliability. Functional operation under absolute–maximum–rated conditions is

not implied.

RECOMMENDED OPERATING CONDITIONS

Symbol

V

CC

V

in

V

I/O

T

A

∆t/∆V

DC Supply Voltage
DC Input Voltage (T/R, OE)
DC Output Voltage
Operating Temperature, All Package Types
Input Rise and Fall Time

Parameter

Parameter

Value

–0.5 to +7.0
–0.5 to +7.0

–0.5 to VCC +0.5

–20

±20
±25
±75

180

–65 to +150

Min

2.0
0
0

–40

0

Max

3.6

5.5

V

CC

+85
100

Unit

V
V

V
mA
mA
mA
mA

mW

_

C

Unit

V

V

V

_

C

ns/V

DC ELECTRICAL CHARACTERISTICS

Symbol

V

IH

ÎÎ

V

IL

ÎÎ

V

OH

ÎÎ

ÎÎ

V

OL

ÎÎ

I

in

ÎÎ

I

OZ

I

CC

Parameter

High–Level Input Voltage

ОООООО

Low–Level Input Voltage

ОООООО

High–Level Output Voltage

ОООООО

(Vin = VIH or VIL)

ОООООО

Low–Level Output Voltage
(Vin = VIH or VIL)

ОООООО

Input Leakage Current

ОООООО

Maximum Three–State
Leakage Current

Quiescent Supply Current

ОООООÎÎ

ОООООÎÎ

IOH = –50µA

ООООО

IOH = –50µA
IOH = –4mA

ООООО

IOL = 50µA
IOL = 50µA

ООООО

IOL = 4mA
Vin = 5.5V or GND

(T/R

ООООО

Vin = VIL or V
V

Vin = VCC or GND

Test Conditions

, OE)

= VCC or GND

out

IH

V

V

2.0

3.0

3.6

2.0

3.0

3.6

2.0

Î

3.0

3.0

Î

2.0

3.0

Î

3.0

3.6

Î

3.6

3.6

TA = 25°C

Min

Typ

Max

1.5

2.0

ÎÎ

2.4

ÎÎÎÎÎÎÎ

0.5

ÎÎÎÎÎÎÎ

1.9

ÎÎ

2.9

2.58

ÎÎ

2.0

Î

3.0

Î

0.0

0.0

ÎÎÎÎ

0.8

0.8

ÎÎ

ÎÎ

0.1

0.1

ÎÎ

0.36
±0.1

ÎÎÎÎÎÎÎ

±0.25

4.0

TA = – 40 to 85°C

Min

Max

1.5

2.0

2.4

ÎÎÎÎ

0.5

ÎÎÎÎÎ

0.8

0.8

1.9

ÎÎ

2.9

2.48

ÎÎ

ÎÎ

ÎÎ

0.1

0.1

ÎÎÎÎÎ

0.44
±1.0

ÎÎÎÎÎ

±2.5

40.0

Unit

V

V

Î

V

Î

Î

V

Î

µA

Î

µA

µA

LCX DATA
BR1339 — REV 3

3 MOTOROLA