Motorola MC74LCX540DT, MC74LCX540SD, MC74LCX540DW, MC74LCX540M Datasheet

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SEMICONDUCTOR TECHNICAL DATA

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The MC74LCX540 is a high performance, inverting octal buffer
operating from a 2.7 to 3.6V supply . This device is similar in function to the
MC74LCX240, while providing flow through architecture. High
impedance TTL compatible inputs significantly reduce current loading to
input drivers while TTL compatible outputs offer improved switching noise
performance. A VI specification of 5.5V allows MC74LCX540 inputs to be
safely driven from 5V devices. The MC74LCX540 is suitable for memory
address driving and all TTL level bus oriented transceiver applications.

Current drive capability is 24mA at the outputs. The Output Enable
(OE1

, OE2) inputs, when HIGH, disables the outputs by placing them in a

HIGH Z condition.

• Designed for 2.7 to 3.6V V

• 5V Tolerant — Interface Capability With 5V TTL Logic

• Supports Live Insertion and Withdrawal

• I

Specification Guarantees High Impedance When VCC = 0V

OFF

• LVTTL Compatible

• LVCMOS Compatible

• 24mA Balanced Output Sink and Source Capability

• Near Zero Static Supply Current in All Three Logic States (10µA)

Substantially Reduces System Power Requirements

• Latchup Performance Exceeds 500mA

• ESD Performance: Human Body Model >2000V; Machine Model >200V

Operation

CC



LOW–VOLTAGE CMOS

OCTAL BUFFER

DW SUFFIX

20

1

20

1

20

1

PLASTIC SOIC
CASE 751D–04

M SUFFIX

PLASTIC SOIC EIAJ

CASE 967–01

SD SUFFIX

PLASTIC SSOP

CASE 940C–03

V

OE2

CC

OE1 D0 D1 D2 D3 D4 D5 D6 D7 GND

8/95

 Motorola, Inc. 1996

Pinout: 20–Lead (Top View)

O0 O1 O2 O3 O4 O5 O6 O7

1920 18 17 16 15 14

21 34567

13

8

1

12

20

1

11

9

10

PIN NAMES

Pins

OEn
Dn
On

REV 1

Function

Output Enable Inputs
Data Inputs
3–State Outputs

DT SUFFIX

PLASTIC TSSOP

CASE 948E–02

MC74LCX540

LOGIC DIAGRAM

1

OE1

19

OE2

D0

2

18

O0

D1

D2

D3

D4

D5

D6

D7

3

4

5

6

7

8

9

17

16

15

14

13

12

11

O1

O2

O3

O4

O5

O6

O7

INPUTS OUTPUTS

OE1 OE2 Dn On

L L L H
L L H L
X H X Z

H X X Z

H = High Voltage Level; L = Low Voltage Level; Z = High
Impedance State; X = High or Low V oltage Level and Transitions
Are Acceptable, for ICC reasons, DO NOT FLOAT Inputs

MOTOROLA LCX DATA

2

BR1339 — REV 3

MC74LCX540

ABSOLUTE MAXIMUM RATINGS*

Symbol Parameter Value Condition Unit

V

CC

V

I

V

O

I

IK

I

OK

I

O

I

CC

I

GND

T

STG

* 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.

1. Output in HIGH or LOW State. IO absolute maximum rating must be observed.

RECOMMENDED OPERATING CONDITIONS

Symbol Parameter Min Typ Max Unit

V

CC

V

I

V

O

I

OH

I

OL

I

OH

I

OL

T

A

∆t/∆V Input Transition Rise or Fall Rate, VIN from 0.8V to 2.0V ,

DC Supply Voltage –0.5 to +7.0 V
DC Input Voltage –0.5 ≤ VI ≤ +7.0 V
DC Output Voltage –0.5 ≤ VO ≤ +7.0 Output in 3–State V

–0.5 ≤ VO ≤ VCC + 0.5 Note 1. V
DC Input Diode Current –50 VI < GND mA
DC Output Diode Current –50 VO < GND mA

+50 VO > V
DC Output Source/Sink Current ±50 mA
DC Supply Current Per Supply Pin ±100 mA
DC Ground Current Per Ground Pin ±100 mA
Storage Temperature Range –65 to +150 °C

Supply Voltage Operating

Data Retention Only
Input Voltage 0 5.5 V
Output Voltage (HIGH or LOW State)

(3–State)
HIGH Level Output Current, VCC = 3.0V – 3.6V –24 mA
LOW Level Output Current, VCC = 3.0V – 3.6V 24 mA
HIGH Level Output Current, VCC = 2.7V – 3.0V –12 mA
LOW Level Output Current, VCC = 2.7V – 3.0V 12 mA
Operating Free–Air Temperature –40 +85 °C

VCC = 3.0V

2.0

1.5

0
0

0 10 ns/V

3.3

3.3

CC

V

3.6

3.6

CC

5.5

mA

V

V

DC ELECTRICAL CHARACTERISTICS

TA = –40°C to +85°C

Symbol Characteristic Condition Min Max Unit

V

IH

V

IL

V

OH

V

OL

2. These values of VI are used to test DC electrical characteristics only.

LCX DATA
BR1339 — REV 3

HIGH Level Input Voltage (Note 2.) 2.7V ≤ VCC ≤ 3.6V 2.0 V
LOW Level Input Voltage (Note 2.) 2.7V ≤ VCC ≤ 3.6V 0.8 V
HIGH Level Output Voltage 2.7V ≤ VCC ≤ 3.6V; IOH = –100µA VCC– 0.2 V

VCC = 2.7V; IOH = –12mA 2.2
VCC = 3.0V; IOH = –18mA 2.4
VCC = 3.0V; IOH = –24mA 2.2

LOW Level Output Voltage 2.7V ≤ VCC ≤ 3.6V; IOL = 100µA 0.2 V

VCC = 2.7V; IOL= 12mA 0.4
VCC = 3.0V; IOL = 16mA 0.4
VCC = 3.0V; IOL = 24mA 0.55

3 MOTOROLA