Datasheet MC1455P1, MC1455BP1, MC1455D, MC1455BD, MC74LCX245DW Datasheet (Motorola)

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SEMICONDUCTOR TECHNICAL DATA

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The MC74LCX245 is a high performance, non–inverting octal
transceiver operating from a 2.7 to 3.6V supply. 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 MC74LCX245 inputs to be
safely driven from 5V devices. The MC74LCX245 is suitable for memory
address driving and all TTL level bus oriented transceiver applications.

Current drive capability is 24mA at both A and B ports. The
Transmit/Receive (T/R
through the bi–directional transceiver. Transmit (active–HIGH) enables
data from A ports to B ports; Receive (active–LOW) enables data from B
to A ports. The Output Enable input, when HIGH, disables both A and B
ports 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

) input determines the direction of data flow

Operation

CC



LOW–VOLTAGE CMOS
OCTAL TRANSCEIVER

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

OE

CC

T/R

9/95

 Motorola, Inc. 1996

Pinout: 20–Lead (Top View)

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

1

13

12

11

9

8

10

20

PIN NAMES

Pins

OE
T/R
A0–A7

B0–B7

REV 3

DT SUFFIX

PLASTIC TSSOP

1

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

CASE 948E–02

MC74LCX245

OPERATING MODE

OE

T/R 1

19

A0

A1

A2

A3

A4

A5

A6

A7

LOGIC DIAGRAM

2

3

4

5

6

7

8

9

18

17

16

15

14

13

12

11

B0

B1

B2

B3

B4

B5

B6

B7

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

MC74LCX245

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

MC74LCX245

DC ELECTRICAL CHARACTERISTICS (continued)

TA = –40°C to +85°C

Symbol Characteristic Condition Min Max Unit

I

I

I

OZ

I

OFF

I

CC

∆I

CC

AC CHARACTERISTICS (tR = tF = 2.5ns; CL = 50pF; RL = 500Ω)

Symbol Parameter Waveform Min Max Max Unit

t

PLH

t

PHL

t

PZH

t

PZL

t

PHZ

t

PLZ

t

OSHL

t

OSLH

3. 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 (t
guaranteed by design.

Input Leakage Current 2.7V ≤ VCC ≤ 3.6V; 0V ≤ VI ≤ 5.5V ±5.0 µA
3–State Output Current 2.7 ≤ VCC ≤ 3.6V; 0V ≤ VO ≤ 5.5V;

Power–Off Leakage Current VCC = 0V; VI or VO = 5.5V 10 µA
Quiescent Supply Current

Increase in ICC per Input 2.7 ≤ VCC ≤ 3.6V; VIH = VCC – 0.6V 500 µA

Propagation Delay
Input to Output

Output Enable Time to
High and Low Level

Output Disable Time From
High and Low Level

Output–to–Output Skew
(Note 3.)

2.7 ≤ VCC ≤ 3.6V; VI = GND or V

2.7 ≤ VCC ≤ 3.6V; 3.6 ≤ VI or VO ≤ 5.5V ± 10 µA

VI = VIH or V

1 1.5

2 1.5

2 1.5

IL

VCC = 3.0V to 3.6V VCC = 2.7V

1.5

1.5

1.5

CC

Limits

TA = –40°C to +85°C

7.0

7.0

8.5

8.5

7.5

7.5

1.0

1.0

) or LOW–to–HIGH (t

OSHL

±5.0 µA

10 µA

8.0

8.0

9.5

9.5

8.5

8.5

); parameter

OSLH

ns

ns

ns

ns

DYNAMIC SWITCHING CHARACTERISTICS

TA = +25°C

Symbol Characteristic Condition Min Typ Max Unit

V

OLP

V

OLV

4. Number of outputs defined as “n”. Measured with “n–1” outputs switching from HIGH–to–LOW or LOW–to–HIGH. The remaining output is
measured in the LOW state.

Dynamic LOW Peak Voltage (Note 4.) VCC = 3.3V, CL = 50pF, VIH = 3.3V, VIL = 0V 0.8 V
Dynamic LOW Valley Voltage (Note 4.) VCC = 3.3V, CL = 50pF, VIH = 3.3V, VIL = 0V 0.8 V

CAPACITIVE CHARACTERISTICS

Symbol Parameter Condition Typical Unit

C

IN

C

I/O

C

PD

MOTOROLA LCX DATA

Input Capacitance VCC = 3.3V, VI = 0V or V
Input/Output Capacitance VCC = 3.3V, VI = 0V or V
Power Dissipation Capacitance 10MHz, VCC = 3.3V, VI = 0V or V

4

CC
CC

CC

7 pF
8 pF

25 pF

BR1339 — REV 3

An, Bn

Bn, An

OE, T/R

An, Bn

t

PLH

1.5V 1.5V

WAVEFORM 1 – PROPAGATION DELAYS

tR = tF = 2.5ns, 10% to 90%; f = 1MHz; tW = 500ns

1.5V

t

PZH

1.5V

t

PHZ

1.5V1.5V

1.5V

t

PHL

2.7V

0V

V

OH

V

OL

2.7V

0V

V

CC

VOH – 0.3V

≈

0V

MC74LCX245

PULSE

GENERATOR

An, Bn

t

PZL

1.5V

WAVEFORM 2 – OUTPUT ENABLE AND DISABLE TIMES

tR = tF = 2.5ns, 10% to 90%; f = 1MHz; tW = 500ns

t

PLZ

Figure 1. AC Waveforms

V

CC

DUT

R

T

TEST SWITCH

t

, t

PLH

PHL

t

, t

PZL

PLZ

Open Collector/Drain t
t

, t

PZH

PHZ

CL = 50pF or equivalent (Includes jig and probe capacitance)
RL = R1 = 500Ω or equivalent
RT = Z

of pulse generator (typically 50Ω)

OUT

PLH

and t

PHL

≈

3.0V

VOL + 0.3V
GND

6V

R

1

C

R

L

L

Open

6V
6V

GND

OPEN
GND

LCX DATA
BR1339 — REV 3

Figure 2. T est Circuit

5 MOTOROLA

MC74LCX245

–A

–

1120

–B

P 10 PL

–

110

D

20 PL

0.010 (0.25) T A B

M

G 18 PL

S S

C

K

–T

SEATING

–

PLANE

OUTLINE DIMENSIONS

DW SUFFIX

PLASTIC SOIC PACKAGE

CASE 751D–04

ISSUE E

J

F

M M

B

M

0.010 (0.25)

R X 45°

NOTES:

1. DIMENSIONING AND TOLERANCING PER
ANSI Y14.5M, 1982.

2. CONTROLLING DIMENSION: MILLIMETER.

3. DIMENSIONS A AND B DO NOT INCLUDE
MOLD PROTRUSION.

4. MAXIMUM MOLD PROTRUSION 0.150
(0.006) PER SIDE.

5. DIMENSION D DOES NOT INCLUDE
DAMBAR PROTRUSION. ALLOWABLE
DAMBAR PROTRUSION SHALL BE 0.13
(0.005) TOTAL IN EXCESS OF D DIMENSION
AT MAXIMUM MATERIAL CONDITION.

MILLIMETERS INCHES

MIN MINMAX MAX

DIM

12.65

A

7.40

B

2.35

C

0.35

D

0.50

F

1.27 BSC 0.050 BSC

G

0.25

J

0.10

K

0

M

°

P

10.05

R

0.25

12.95

7.60

2.65

0.49

0.90

0.32

0.25
7

10.55

0.75

0.499

0.510

0.292

0.299

0.093

0.104

0.014

0.019

0.020

0.035

0.010

0.012

0.004

0.009

0

7

°

°

°

0.395

0.010

0.415

0.029

20 11

1

Z

D

e

b

0.13 (0.005)

M

HEE

10

A

A

1

0.10 (0.004)

PLASTIC SOIC EIAJ PACKAGE

M SUFFIX

CASE 967–01

ISSUE O

L

E

_

M

L

DETAIL P

VIEW P

NOTES:

1 DIMENSIONING AND TOLERANCING PER ANSI

Y14.5M, 1982.
2 CONTROLLING DIMENSION: MILLIMETER.
3 DIMENSIONS D AND E DO NOT INCLUDE MOLD

FLASH OR PROTRUSIONS AND ARE MEASURED

AT THE PARTING LINE. MOLD FLASH OR

Q

1

PROTRUSIONS SHALL NOT EXCEED 0.15 (0.006)

PER SIDE.
4 TERMINAL NUMBERS ARE SHOWN FOR

REFERENCE ONLY.
5 THE LEAD WIDTH DIMENSION (b) DOES NOT

INCLUDE DAMBAR PROTRUSION. ALLOWABLE

DAMBAR PROTRUSION SHALL BE 0.08 (0.003)

TOTAL IN EXCESS OF THE LEAD WIDTH

DIMENSION AT MAXIMUM MATERIAL CONDITION.

DAMBAR CANNOT BE LOCATED ON THE LOWER

RADIUS OR THE FOOT. MINIMUM SPACE

BETWEEN PROTRUSIONS AND ADJACENT LEAD

TO BE 0.46 ( 0.018).

10

_

INCHES

0

_

MILLIMETERS

c

DIM MIN MAX MIN MAX
A

--- 2.05 --- 0.081

A

0.05 0.20 0.002 0.008

1

b

0.35 0.50 0.014 0.020

c

0.18 0.27 0.007 0.011

D

12.35 12.80 0.486 0.504

E

5.10 5.45 0.201 0.215

e

1.27 BSC 0.050 BSC

H

7.40 8.20 0.291 0.323

E

L

0.50 0.85 0.020 0.033

L

1.10 1.50 0.043 0.059

E

M

0

_

Q

0.70 0.90 0.028 0.035

1

Z

--- 0.81 --- 0.032

10

_

MOTOROLA LCX DATA

6

BR1339 — REV 3

OUTLINE DIMENSIONS

MC74LCX245

0.076 (0.003)

SEATING

–T–

PLANE

L/2

L

PIN 1
IDENT

0.20 (0.008) T

C

D

K20X REF

0.12 (0.005) V

20 11

A

–V–

M

S

U

G

SD SUFFIX

PLASTIC SSOP PACKAGE

CASE 940C–03

M

S

U

T

B

101

–U–

H

ISSUE B

S

N

J

DETAIL E

0.25 (0.010)

N

F

DETAIL E

K

K1

SECTION N–N

NOTES:

13 DIMENSIONING AND TOLERANCING PER ANSI

Y14.5M, 1982.
14 CONTROLLING DIMENSION: MILLIMETER.
15 DIMENSION A DOES NOT INCLUDE MOLD FLASH,

PROTRUSIONS OR GATE BURRS. MOLD FLASH

OR GATE BURRS SHALL NOT EXCEED 0.15

(0.006) PER SIDE.
16 DIMENSION B DOES NOT INCLUDE INTERLEAD

FLASH OR PROTRUSION. INTERLEAD FLASH OR

PROTRUSION SHALL NOT EXCEED 0.15 (0.006)

PER SIDE.

M

J1

–W–

17 DIMENSION K DOES NOT INCLUDE DAMBAR

PROTRUSION/INTRUSION. ALLOWABLE DAMBAR

PROTRUSION SHALL BE 0.13 (0.005) TOTAL IN

EXCESS OF K DIMENSION AT MAXIMUM

MATERIAL CONDITION. DAMBAR INTRUSION

SHALL NOT REDUCE DIMENSION K BY MORE

THAN 0.07 (0.002) AT LEAST MATERIAL

CONDITION.
18 TERMINAL NUMBERS ARE SHOWN FOR

REFERENCE ONLY.
19 DIMENSION A AND B ARE TO BE DETERMINED

AT DATUM PLANE –W–.

MILLIMETERS

DIMAMIN MAX MIN MAX

7.07 7.33 0.278 0.288

B 5.20 5.38 0.205 0.212
C 1.73 1.99 0.068 0.078
D 0.05 0.21 0.002 0.008

F 0.63 0.95 0.024 0.037
G 0.65 BSC 0.026 BSC
H 0.59 0.75 0.023 0.030

J 0.09 0.20 0.003 0.008

J1 0.09 0.16 0.003 0.006

K 0.25 0.38 0.010 0.015

K1 0.25 0.33 0.010 0.013

L 7.65 7.90 0.301 0.311
M 0 8 0 8

____

INCHES

PLASTIC TSSOP PACKAGE

DT SUFFIX

CASE 948E–02

S

B

–U–

ISSUE A

S

JJ1

N

SECTION N–N

N

F

DETAIL E

DETAIL E

K

K1

0.25 (0.010)

M

NOTES:

6 DIMENSIONING AND TOLERANCING PER ANSI

Y14.5M, 1982.
7 CONTROLLING DIMENSION: MILLIMETER.
8 DIMENSION A DOES NOT INCLUDE MOLD FLASH,

PROTRUSIONS OR GATE BURRS. MOLD FLASH

OR GATE BURRS SHALL NOT EXCEED 0.15

(0.006) PER SIDE.
9 DIMENSION B DOES NOT INCLUDE INTERLEAD

FLASH OR PROTRUSION. INTERLEAD FLASH OR

PROTRUSION SHALL NOT EXCEED 0.25 (0.010)

PER SIDE.

10 DIMENSION K DOES NOT INCLUDE DAMBAR

PROTRUSION. ALLOWABLE DAMBAR

PROTRUSION SHALL BE 0.08 (0.003) TOTAL IN

EXCESS OF THE K DIMENSION AT MAXIMUM

MATERIAL CONDITION.

11 TERMINAL NUMBERS ARE SHOWN FOR

REFERENCE ONLY.

12 DIMENSION A AND B ARE TO BE DETERMINED

AT DATUM PLANE –W–.

INCHES

6.60 0.260

–W–

MILLIMETERS

DIMAMIN MAX MIN MAX

6.40 0.252

B 4.30 4.50 0.169 0.177
C 1.20 0.047

––– –––

D 0.05 0.15 0.002 0.006
F 0.50 0.75 0.020 0.030
G 0.65 BSC 0.026 BSC
H 0.27 0.37 0.011 0.015
J 0.09 0.20 0.004 0.008

J1 0.09 0.16 0.004 0.006

K 0.19 0.30 0.007 0.012

K1 0.19 0.25 0.007 0.010

L 6.40 BSC 0.252 BSC
M 0 8 0 8

____

20X REFK

M

S

U0.15 (0.006) T

2X

L/2

L

PIN 1
IDENT

110

S

U0.15 (0.006) T

0.10 (0.004) V

U

T

1120

A

–V–

C

D

G

H

0.100 (0.004)

SEATING

–T–

PLANE

LCX DATA
BR1339 — REV 3

7 MOTOROLA

MC74LCX245

Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty , representation or guarantee regarding
the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and
specifically disclaims any and all liability, including without limitation consequential or incidental damages. “T ypical” parameters which may be provided in Motorola
data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals”
must be validated for each customer application by customer’s technical experts. Motorola does not convey any license under its patent rights nor the rights of
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applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury
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Opportunity/Affirmative Action Employer.

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MOTOROLA LCX DATA

8

◊

MC74LCX245/D

BR1339 — REV 3