74LVX4245MTC datasheet(5/8 Pages) NSC

Il numero della parte	74LVX4245MTC

Spiegazioni elettronici	8-Bit Dual Supply Translating Transceiver with TRI-STATE Outputs

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Produttore elettronici	NSC [National Semiconductor (TI)]

Homepage	http://www.national.com

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AC Electrical Characteristics

Symbol

Parameters

74LVX4245

Units

TA ea25 CTA eb40 Cto a85 CTA eb40 Cto a85 C

CL e 50 pF

VCCA e 5V

VCCB e 33V

VCCB e 27V

Min

Typ

Max

Min

Max

Min

Max

tPHL

Propagation Delay

10

51

85

10

90

10

100

ns

tPLH

A to B

10

53

85

10

90

10

100

tPHL

Propagation Delay

10

54

85

10

90

10

100

ns

tPLH

B to A

10

55

85

10

90

10

100

tPZL

Output Enable Time

10

65

100

10

105

10

115

ns

tPZH

OE to B

10

67

100

10

105

10

115

tPZL

Output Enable Time

10

52

90

10

95

10

100

ns

tPZH

OE to A

10

58

90

10

95

10

100

tPHZ

Output Disable Time

10

60

95

10

100

10

100

ns

tPLZ

OE to B

10

33

65

10

70

10

75

tPHZ

Output Disable Time

10

39

70

10

75

10

75

ns

tPLZ

OE to A

10

29

65

10

70

10

75

tOSHL

Output to Output

tOSLH

Skew

10

15

ns

Data to Output

Voltage Range 50V is 50V g05V

Voltage Range 33V is 33V g03V

Skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of the same device The

specification applies to any outputs switching in the same direction either HIGH to LOW (tOSHL) or LOW to HIGH (tOSLH) Parameter guaranteed by

design

Capacitance

Symbol

Parameter

Typ

Units

Conditions

CIN

Input Capacitance

45

pF

VCC e Open

CIO

InputOutput

15

pF

VCCA e 50V

Capacitance

VCCB e 33V

CPD

Power Dissipation

B

xA55

pF

VCCA e 50V

Capacitance

A

xB40

pF

VCCB e 33V

CPD is measured at 10 MHz

8-Bit Dual Supply Translating Transceiver

The LVX4245 is a dual supply device capable of bidirection-

al signal translation This level shifting ability provides an

efficient interface between low voltage CPU local bus with

memory and a standard bus defined by 5V IO levels The

device control inputs can be controlled by either the low

voltage CPU and core logic or a bus arbitrator with 5V IO

levels

Manufactured on a sub-micron CMOS process

the

LVX4245 is ideal for mixed voltage applications such as

notebook computers using 33V CPU’s and 5V peripheral

devices

TLF11540 – 3

5

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