Motorola MC74LVX4245DW, MC74LVX4245DT Datasheet

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SEMICONDUCTOR TECHNICAL DATA

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The 74LVX4245 is a 24–pin dual–supply, octal translating transceiver
that is designed to interface between a 5V bus and a 3V bus in a mixed
3V/5V supply environment such as laptop computers using a 3.3V CPU
and 5V LCD display. The A port interfaces with the 5V bus; the B port
interfaces with the 3V bus.

The Transmit/Receive (T/R
Transmit (active–High) enables data from the A port to the B port.
Receive (active–Low) enables data from the B port to the A port. The
Output Enable (OE
placing them in 3–State.

) input, when High, disables both A and B ports by

• Bi–directional Interface Between 5V and 3V Buses

• Control Inputs Compatible with TTL Level

• 5V Data Flow at A Port and 3V Data Flow at B Port

• Outputs Source/Sink 24mA at 5V Bus and 12mA at 3V Bus

• Guaranteed Simultaneous Switching Noise Level and Dynamic

Threshold Performance

• Available in SOIC and TSSOP Packages

• Functionally Compatible with the 74 Series 245

) input determines the direction of data flow.



LVX

LOW–VOLTAGE CMOS

DW SUFFIX

24–LEAD PLASTIC SOIC PACKAGE

CASE 751E–04

V

V

OE

CCB

CCB
2324 22 21 20 19 18

21 34567

V

T/R

CCA

B0 B1 B2 B3 B4 B5 B6

A0 A1 A2 A3 A4 A5 A6 A7

Figure 1. 24–Lead Pinout

(Top View)

17

B7 GND

16

9

8

15

10

14

13

11

12

GND GND

24–LEAD PLASTIC TSSOP PACKAGE

PIN NAMES

Pins

OE
T/R
A0–A7

B0–B7

DT SUFFIX

CASE 948H–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

7/97

 Motorola, Inc. 1997

1

REV 2

MC74LVX4245

OPERATING MODE

OE

T/R 2

22

A0

A1

A2

A3

A4

A5

A6

A7

10

3

21

B0

4

20

B1

5

19

B2

6

18

B3

7

17

B4

8

16

B5

9

15

B6

14

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 LVX Data — Low–Voltage CMOS Logic

2

Non–Inverting

BR1492 — Rev 0

MC74LVX4245

ABSOLUTE MAXIMUM RATINGS*

Symbol Parameter Value Condition Unit

V

, V

CCA

CCB

V

I

V

I/O

I

IK

I

OK

I

O

ICC, I

GND

T

STG

Latchup DC Latchup Source/Sink Current ±300 mA

* 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 Parameter Min Max Unit

V

, V

CCA

CCB

V

I

V

I/O

T

A

∆t/∆V Minimum Input Edge Rate

DC Supply Voltage –0.5 to +7.0 V
DC Input Voltage OE, T/R –0.5 to V
DC Input/Output Voltage An –0.5 to V

Bn –0.5 to V
DC Input Diode Current OE, T/R ±20 VI < GND mA
DC Output Diode Current ±50 VO < GND; VO > V
DC Output Source/Sink Current ±50 mA
DC Supply Current Per Output Pin

Storage Temperature Range –65 to +150 °C

Supply Voltage V

Input Voltage OE, T/R 0 V
Input/Output Voltage An

Operating Free–Air Temperature –40 +85 °C

VIN from 30% to 70% of VCC; VCC at 3.0V , 4.5V, 5.5V

Maximum Current at I
Maximum Current at I

CCA
CCB

V

CCA
CCB

Bn

+0.5 V

CCA

+0.5 V

CCA

+0.5 V

CCB

±50
±200
±100

4.5

2.7

0
0

0 8 ns/V

V
V

5.5

3.6
CCA

CCA
CCB

CC

mA

mA

V

V
V

DC ELECTRICAL CHARACTERISTICS

Symbol Parameter Condition V

V

IHA

V

IHB

V

ILA

V

ILB

V

OHA

V

OHB

V

OLA

V

OLB

LVX Data — Low–Voltage CMOS Logic
BR1492 — Rev 0

Minimum HIGH Level
Input Voltage

Maximum LOW Level
Input Voltage

Minimum HIGH Level
Output Voltage

Maximum LOW Level
Output Voltage

An,OE

T/R

Bn

An,OE

T/R

Bn

V

≤ 0.1V

OUT

or

≥ VCC – 0.1V

V

≤ 0.1V

OUT

or

≥ VCC – 0.1V

I

= –100µA

OUT

IOH = –24mA

I

= –100µA

OUT

IOH = –12mA

IOH = –8mA

I

= 100µA

OUT

IOL = 24mA

I

= 100µA

OUT

IOL = 12mA

IOL = 8mA

TA = 25°C TA = –40 to +85°C

CCAVCCB

5.5

4.5

5.0

5.0

5.5

4.5

5.0

5.0

4.5

4.5

4.5

4.5

4.5

4.5

4.5

4.5

4.5

4.5

3 MOTOROLA

3.3

3.3

3.6

2.7

3.3

3.3

2.7

3.6

3.0

3.0

3.0

3.0

2.7

3.0

3.0

3.0

3.0

2.7

Typ Guaranteed Limits Unit

4.50

4.25

2.99

2.80

2.50

0.002

0.18

0.002

0.1

0.1

2.0

2.0

2.0

2.0

0.8

0.8

0.8

0.8

4.40

3.86

2.9

2.4

2.4

0.10

0.36

0.10

0.31

0.31

2.0

2.0

2.0

2.0

0.8

0.8

0.8

0.8

4.40

3.76

2.9

2.4

2.4

0.10

0.44

0.10

0.40

0.40

V

V

V

V

V

V

V

V