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SEMICONDUCTOR TECHNICAL DATA

Advance Information

20

H SUFFIX

PLASTIC DIP

CASE 804

MC145444 is a silicon gate CMOS frequency shift keying (FSK) modem

intended for use with telemeter systems or remote control systems over the

telephone network.

1

This device is compatible with CCITT V.21 and contains the entire circuit that

provides a full–duplex or half–duplex 300–baud data communication over a pair

of telephone lines. This device also includes the DTMF generator and call

progress tone detector (CPTD).

The differential line driver has the capability of driving 0 dBm into a 600 Ω load

with a single +5 V power supply.

DW SUFFIX

SOG PACKAGE

CASE 751D

20

1

The transmit level is controlled by the programmable attenuator in 1 dB steps.

Devices functions are controlled through a 3–wire serial interface.

ORDERING INFORMATION

MC145444P

Plastic DIP

MC145444DW SOG Package

•

Capable of Driving 0 dBm into a 600 Ω Load

DTMF Generator On–Chip

Imprecise Call Progress Detector On–Chip

A Transmit Attenuator Programmable in 1 dB Steps

3–Wire Serial Interface

PIN ASSIGNMENT

Compatible with CCITT V.21

RxBO

FTLC

1

2

20

19

RxGC

RxA

2100 Hz Answer Tone Generator On–Chip

Analog Loopback Configuration for Self Test

Simplex, Half–Duplex, and Full–Duplex Operation

GNDA

CDA

3

4

18

17

TxA1

TxA2

GND

TLA

5

6

16

15

DSI

V

CC

X1

X2

7

14

13

12

11

ENB

SCK

8

SD

9

DATA

TxD

RxD

10

This document contains information on a new product. Specifications and information herein are subject to change without notice.

REV 0

8/95

Motorola, Inc. 1995

MOTOROLA

MC145444

1

BLOCK DIAGRAM

RxBO

RxA

FTLC

RxD

+

–

ANTI–ALIAS

FILTER

S/H

FSK

LOW–BAND

BPF

MUX

AC AMP

DEMODULATOR

65 k

RxGC

30 k

SD

CARRIER/CPT

DETECTOR

MUX/

MIXING

HIGH–BAND

BPF

CDA

TxD

TLA

FSK

MODULATOR

DSI

Rf

LEVEL

CONTROL

DTMF

GENERATOR

R

_

+

SMOOTHING

FILTER

20 k

TxA1

TxA2

CONTROL

LOGIC

– 1

15–BIT

LATCH

POWER–ON

RESET

ENB

15–BIT

SHIFT REGISTER

DATA

SCK

CLOCK

GENERATOR

ANALOG GROUND

GENERATOR

X1

X2

GNDA

GND

V

CC

MAXIMUM RATINGS* (Voltages Referenced to V

)

SS

Rating

DC Supply Voltage

Symbol

Value

Unit

V

CC

– 0.5 to + 7.0

V

DC Input Voltage

V

– 0.5 to V

+ 0.5

V

in

CC

DC Output Voltage

V

out

– 0.5 to V

+ 0.5

CC

Clamp Diode Current per Pin

DC Current per Pin

I

, I

± 20

mA

mW

°C

IK OK

I

± 25

out

Power Dissipation

P

D

500

Storage Temperature Range

T

stg

– 65 to + 150

RECOMMENDED OPERATING CONDITIONS

Parameter

DC Supply Voltage

Symbol

Min

4.5

0

Typ

5

Max

5.5

Unit

V

CC

DC Input Voltage

V

in

—

V

CC

V

DC Output Voltage

Input Rise Time

V

out

0

V

CC

V

t

r

0

500

—

ns

MHz

°C

Input Fall Time

t

f

0

Crystal Frequency

Operating Temperature Range

f

—

– 20

3.579545

25

osc

T

A

70

MC145444

2

MOTOROLA

DC ELECTRICAL CHARACTERISTICS (V

= + 5.0 V ± 10%, T = – 20 to + 70°C)

A

CC

Characteristic

Symbol

Conditions

Min

3.15

—

Typ

—

Max

—

Unit

Input Voltage

H Level

L Level

V

IH

V

IL

—

1.1

Output Voltage

H Level

L Level

V

I

= 20 µA

V

CC

– 0.1

V – 0.01

CC

—

V

OH

V

I

= 20 µA

= 2 mA

—

0.01

—

0.1

0.4

OL

Input Current DATA, SCK, E, TxD

Quiescent Supply Current

I

V

= V or GND

CC

—

± 1.0

8

± 10.0

—

µA

mA

µA

in

I

FSK Mode

CC

Power–Down Mode 1

Power–Down Mode 2

—

300

1

Power–Down Supply Current

—

µA

TRANSMIT CARRIER CHARACTERISTICS (V

= + 5.0 V ± 10%, T = – 20 to + 70°C)

A

CC

Characteristic

Symbol

Conditions

Min

974

1174

1644

1844

2094

—

Typ

980

Max

986

1186

1656

1856

2106

—

Unit

Carrier Frequency Channel 1

Mark ‘‘1’’

Space ‘‘0’’

Mark ‘‘1’’

Space ‘‘0’’

f

Hz

1M

f

1180

1650

1850

2100

6

1S

Crystal Frequency

3.579545 MHz

Carrier Frequency Channel 2

f

2M

f

2S

Answer Tone

f

ans

Transmit Carrier Level

Second Harmonic Energy

Out–of–Band Energy

V

O

*

dBm

Attenuator = 0 dB

RTLA = ∞

V

2h

*

—

– 46

—

V

OE

*

Figure 1

* V

TXA1

– V

, R = 1.2 kΩ

TXA2

L

TRANSMIT ATTENUATOR CHARACTERISTICS (V

CC

= + 5.0 V ± 10%, T = – 20 to + 70°C)

A

Characteristic

Attenuator Range

Attenuator Accuracy

Symbol

Conditions

Min

0

Typ

—

Max

15

Unit

dB

A

RNG

A

ACC

– 0.5

—

+ 0.5

dB

RECEIVER CHARACTERISTICS (Includes Hybrid, Demodulator and Carrier Detector)

(V

CC

= + 5.0 V ± 10%, T = – 20 to + 70°C)

A

Characteristic

Symbol

Conditions

Min

50

– 48

—

Typ

—

Max

—

Unit

kΩ

Input Impedance

Receiver Carrier Amplitude

Carrier Detect

R

V

RxA Pin (Pin 19)

IRX

—

– 12

—

dBm

IRX

OFF to ON

ON to OFF

V

CDA = 1.2 V

– 44

– 47

—

CDON

f

in

= 1.0 kHz

Threshold

V

—

CDOF

Hysterisis (V

– V

)

H

VS

2

—

dB

ms

CDON

CCDOF

Carrier Detect Timing

OFF to ON

CD1 = 0, CD0 = 0

CD1 = 0, CD0 = 1

CD1 = 0, CD1 = 1

CD1 = 1, CD0 = 1

CD1 = 0, CD0 = 0

CD1 = 0, CD0 = 1

CD1 = 1, CD0 = 1

—

450

15

—

T

CDON

—

15

—

80

—

ON to OFF

—

30

—

30

—

T

CDOFF

—

15

—

10

—

MOTOROLA

MC145444

3

BAND–PASS FILTER CHARACTERISTICS (RxA to FTLC) (V

CC

= + 5.0 V ± 10%, T = – 20 to + 70°C)

A

Characteristic

FTLC Output Impedance

Symbol

Conditions

Min

10

—

Typ

—

Max

50

—

Unit

kΩ

dB

R

OFT

Adjacent Channel Rejection

Pass–Band Gain

REJ

V

RXA

= – 12 dBm

50

G

—

10

—

dB

PAS

Group Delay

Low–Band Filter

930 – 1230 Hz

—

700

—

µs

High–Band Filter

1600 – 1900 Hz

—

800

—

DTMF CHARACTERISTICS (V

Characteristic

= + 5.0 V ± 10%, T = – 20 to + 70°C)

A

CC

Symbol

V *

Conditions

Min

—

Typ

Max

—

3

Unit

Tone Output Level

Low Group

High Group

3

dBm

fl

V *

fh

—

4

High Group Pre Emphasis

DTMF Distortion

P

Attenuator = 0 dB

RTLA = ∞

Crystal Frequency

3.579545 MHz

0

—

dB

%

E

DIST

—

5

—

1

DTMF Frequency Variation

Out–of–Band Energy

Setup Time

∆f

– 1

—

Figure 1

4

%

V

OE

*

dB

ms

t

—

osc

* V

TXA1

– V

, R = 1.2 kΩ

TXA2

L

CPTD CHARACTERISTICS (V

= + 5.0 V ± 10%, T = – 20 to + 70°C)

A

CC

Characteristic

Symbol

Conditions

Min

—

Typ

400

140

– 44

– 47

10

Max

—

Unit

Hz

Band–Pass Filter Center Frequency

Band–Pass Filter – 3 dB Band Width

Tone Detect Level

f

c

∆

—

Hz

BW

OFF to ON

ON to OFF

V

—

dBm

TDON

V

—

TDOF

TDON

CDA = 1.2 V

= 400 Hz

f

in

Tone Detect Timing

OFF to ON

ON to OFF

T

—

ms

T

—

25

—

TDOF

DEMODULATOR CHARACTERISTICS (V

= + 5.0 V ± 10%, T = – 20 to + 70°C)

CC

A

Characteristic

Bit Bias

Symbol

ID

Conditions

Min

—

Typ

5

Max

—

Unit

%

Input Level = – 24 dBm

Bit Error Rate

BER

Input Level = – 24 dBm

CCITT Line Simulation

511 Bit Pattern

—

0.00001

—

S/N = 5 dB

SWITCHING CHARACTERISTICS (V

= + 5.0 V ± 10%, T = – 20 to + 70°C)

A

CC

Characteristic

Symbol

Conditions

Min

50

—

Typ

—

Max

—

2

Unit

ns

Setup Times

DATA to SCK

SCK to ENB

SCK to DATA

ENB to SCK

t

su

ns

Hold Time

t

h

ns

Recovery Time

Input Rise Time

Input Fall Time

Input Pulse Width

t

ns

rec

t

r

µs

ns

t

f

—

2

ENB, SCK

t

w

50

—

MC145444

4

MOTOROLA

— V

0

3.4 k 4 k

16 k

256 k

CC

— GND

DATA 50%

f (Hz)

t

h

su

0

LAST

FIRST

CLK

— V

CC

— GND

SCK

ENB

50%

CLK

t

– 25

su

rec

– 15 dB/OCT.

— V

CC

— GND

50%

– 55

t

f

r

ENB

50%

— V

CC

— GND

50%

Figure 1. Out–of–Band Energy

PIN DESCRIPTION

Figure 2. Switching Characteristics

ENB

Enable Input (Pin 14)

Data is loaded into the 15–bit shift register when this pin is

at a logic low. When this pin transitions from a logic high to

low, the data is transferred to the internal latch on the falling

edge of ENB. New data loaded into the shift register will not

affect the device operation until this pin transitions from high

to low. (See Figure 2.)

V

CC

Positive Power Supply (Pin 15)

This pin is normally tied to the + 5.0 V. A 0.1 µF decoupling

capacitor should be used.

GND

TxD

Ground Pin (Pin 5)

Transmit Data Input (Pin 11)

This pin is normally tied to 0 V.

This pin is the transmit data input, The mark frequency is

generated when this pin is at the logic high level. The space

frequency is generated when the pin is at a logic low.

GNDA

Analog Ground (Pin 3)

RxD

Analog ground is internally biased to (V

should be tied to ground through a 0.1 µF and 100 µF

– V )/2. It

SS

CC

Receive Data Output (Pin 10)

This pin is the receive data output. A high logic level of this

pin indicates that the mark carrier frequency has been re-

ceived, and a low logic level indicates the space carrier fre-

quency has been received.

capacitor.

X1

Crystal Oscillator Output (Pin 7)

SD

Connecting a 3.579545 MHz ± 0.1% crystal between X1

and X2 will cause the transmit frequencies to be within

± 64 MHz of nominal. X1 is capable of driving several CMOS

gates. An external clock may be applied to X2. X1 should

then be left open.

Carrier/Call Progress Tone Detect (Pin 9)

This pin is the output from the carrier detector or call prog-

ress tone detector. This pin works as a carrier detector in the

FSK mode and as the call progress tone detector in the

CPTD mode. The output goes to a logic low level when the

input signal reaches the minimum threshold of the detect

level that is adjusted by the CDA voltage. When SD = H, the

receive data output (RxD) is clamped high to avoid errors

that may occur with loop noise. The SD pin is also clamped

high in the other modes except during the power–down

mode.

X2

Crystal Oscillator Input (Pin 8)

Refer to X1.

SCK

Shift Resister Clock Input (Pin 13)

TxA1

This pin is the clock input for the 15–bit shift register. Serial

data is loaded into the shift register on the rising edge of this

clock.

Non–Inverting Transmit Analog Carrier Output (Pin 18)

This pin is the line driver non–inverting output of the FSK

and tone transmit analog signals. A + 6 dBm (max) differen-

tial output voltage can be obtained by connecting a 1.2 kΩ

load resistor between Tx1 and Tx2. Attention must be set so

as not to exceed this level when an external input is added

to the DSI pin. A telephone line (600 Ω) is driven through an

external 600 Ω resistor. In this case, the output level be-

comes about half of differential output.

DATA

Serial Data Input (Pin 12)

This pin is the 15–bit serial data input. This data deter-

mines the mode, DTMF signal, transmit attenuation, carrier

detect time, channel, and transmit squelch.

MOTOROLA

MC145444

5

TxA2

between this pin and GND. The maximum transmit level is

obtained when this pin is connected to GND (RTLA = 0).

Inverting Transmit Analog Carrier Output (Pin 17)

This pin is the line driver inverting output. The signal is

equal in magnitude, but 180° out of phase with the TxA1

(refer to TxA1).

SERIAL INTERFACE

The following six functions are set up with the 15–bit serial

data.

RxA

Receive Signal Input (Pin 19)

FUNCTION MODE

:

M2

A3

SQ

T3

M1

A2

M0

A1

This pin is the receive signal input. The pin has an input

impedance of 50 kΩ (min).

TRANSMIT ATTENUATOR

TRANSMIT SQUELCH

TONE FREQUENCY

CHANNEL

A0

T0

RxGC

T2

T1

Receive Gain Adjust (Pin 20)

This pin is used to adjust the receive buffer gain. To adjust

the gain, the signal from the RxBO through a divider is added

as a feedback. This pin may be held open when the gain

adjustment is not needed.

CH

CARRIER DETECT TIME

CD1 CD0

Figure 3 presents the 15–bit serial data timing, starting

with the carrier detect time, CD1, followed by the channel,

the tone frequency, the transmit squelch, the transmit attenu-

ator, and the function mode. This data is loaded into the inter-

nal shift register at the rising edge of the SCK signal and

latched at the falling edge of the ENB signal.

RxBO

Receiver Buffer Output (Pin 1)

This pin is the receive buffer output.

DSI

Driver Summing Input (Pin 16)

FUNCTION MODE

This pin is the inverting input of the line driver. An external

Modes are selected from the following 3–bit data (M2 –

M0, see Table 1).

signal is transmitted through an external series resistor R

.

DSI

The differential gain G

DSI

= (V

TXA1

– V

)/V is deter-

TXA2 DSI

mined by the following equation.

Table 1. Function Mode Truth Table

G

= – 2Rf / R

, Rf ≈ 20 kΩ

DSI

DSI should be left open when not used.

M2

0

M1

0

M0

0

Function Mode

FSK

CDA

Carrier Detect Level/CPTD Level Control (Pin 4)

0

1

Analog Loopback

CPTD

0

1

0

The carrier/call progress tone detect level is programmed

with a CDA pin voltage.

0

1

Answer Tone

DTMF

1

0

When this pin is held open, the CDA voltage is set to

1.2 V with an internal divider. The detect level is set at

– 44 dBm (typ) for off to on, and – 47 dBm (typ) for on to off.

The minimum hysteresis is 2 dB. This pin has a very high

input impedance so it should be connected to GND with a

0.1 µF capacitor to keep it well regulated. An external voltage

may be applied to this pin to adjust the carrier detect

threshold. The following equations may be used to find the

CDA voltage required for a given threshold voltage.

1

0

1

Single Tone

Power–Down 1

Power–Down 2

1

0

1

The following paragraphs describe each function. Table 2

presents each output status.

FSK Mode

V

CDA

V

CDA

= 245 × V

on

= 347 × V

off

The transmitter and the receiver work as a FSK modula-

tor/demodulator. The SD pin output is the carrier’s detect

signal.

FTLC

Filter Test (Pin 2)

Analog Loopback Mode

This pin is a high–impedance filter output. It may be used

to check the receive filter. This pin also may be used as a

demodulator input. In normal operation, this pin is connected

to the GNDA through a 0.1 µF bypass capacitor. This pin

handles very small signals so care must be used with the

capacitor’s wiring.

TxA1 connects to the receiver internally and FSK signals

are demodulated. The frequency of the receiver is set up with

the same frequency as the transmitter. The SD pin output is

the carrier detect signal. An IC self test is supported with this

function.

CPTD Mode

TLA

Transmit Carrier Level Adjust (Pin 6)

The receiver detects a 400 Hz call progress tone. The

detect signal comes from the SD pin. The transmitter is

disabled.

This pin is used to adjust the transmit carrier level that is

determined by the value of the resistor (RTLA) connected

MC145444

6

MOTOROLA

DATA

CD1

CD0

CH

T3

T2

T1

T0

SQ

A3

A2

A1

A0

M2

M1

M0

SCK

E

Figure 3. Serial Data Timing

Table 2. Output Status

Output

Function Mode

RxD

SD

TxA1, TxA2

FSK

Received

Digital Data

Carrier

Detect

FSK

Analog Loopback

CPTD

H

CPTD

V

CC

/2

Answer Tone

DTMF

H

Answer Tone

DTMF Tone

Single Tone

High–Z

Single Tone

Power–Down 1, 2

H

High–Z

Answer Tone Mode

Power–Down Mode 2

The transmitter works as 2100 Hz answer tone generator.

The receiver is disabled.

All circuits including the oscillator stop working and all out-

puts go to the high impedance state. The supply current de-

creases to 1.0 µA (max).

DTMF Mode

The transmitter works as a DTMF tone generator. The

receiver is disabled.

Transmit Attenuator

Four–bit serial data (A3 – A0) sets up the analog transmit

level in the FSK, answer tone, DTMF, analog loopback, and

single tone mode. The range of the transmit attenuator is 0 –

15 dB in 1 dB steps. The external signal (DSI) is not affected

by this attenuator.

Single Tone Mode

The transmitter output is one of the DTMF eight frequen-

cies. The receiver is disabled.

Power–Down Mode 1

TONE FREQUENCY

Internal circuits except the oscillator are disabled, and all

outputs except the X1 pin go to the high impedance state.

The supply current decreases to 300 µA (max).

The DTMF tones or the single tone mode is selected by

the 4–bit serial data (T3 – T0).

MOTOROLA

MC145444

7

Table 3. Transmit Attenuator Truth Table

A3

0

1

A2

0

1

0

1

A1

0

1

0

1

0

1

0

1

A0

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

Attenuation (dB)

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

Table 4. Tone Frequency Truth Table

Tone Frequency (Hz)

DTMF Mode

Single

Tone Mode

Keyboard

Equivalent

T3

0

1

T2

0

1

0

1

T1

0

1

0

1

0

1

0

1

T0

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

Low Group

941

High Group

1633

1209

1336

1477

1209

1336

1477

1209

1336

1477

1336

1209

1477

1633

D

1

2

3

4

5

6

7

8

9

0

*

941

697

770

852

1336

1477

1336

1209

1477

1633

852

941

#

A

B

C

697

770

852

MC145444

8

MOTOROLA

TRANSMIT SQUELCH

V

on

V

off

The 1–bit serial data (SQ) controls the transmit analog sig-

nal. The FSK signal, DTMF tones, single tone, and answer

tone are disabled. The external signal to the DSI will be

transmitted at that time. The internal line driver works at all

times except during the power–down mode.

RxA

SQ

1

Squelch

Enable

t

on

off

SD

0

Disable

CHANNEL

Figure 4. Carrier Detect Timing

The transmit and receive channel is set up with a 1–bit se-

rial data (CH) when the function mode is either in FSK or

analog loopback.

When the function mode is either on the FSK or analog

loopback mode, the transmit and receive channel is set up

with a 1–bit serial data (CH).

Table 5. Carrier Detect Time Truth Table

Carrier Detect Time (Typ)

CD1

CD0

t

on

(ms)

t

off

(ms)

0

1

0

1

0

1

450

30

15

80

30

15

10

CH

1

Channel

1 (Originate)

2 (Answer)

0

POWER–ON RESET

CARRIER DETECT TIME

When the power is switched on, this device has the follow-

ing conditions.

The carrier detect time (see Figure 4 and Table 5) is set by

2–bit serial data (CD1, CD0). t indicates the amount of time

the carrier is greater than V threshold must be present be-

on

fore SD goes low.

on

Function Mode

Transmit Attenuator

Transmit Squelch

Channel

FSK

0 dB

t

, on the other hand, indicates the amount of delay time

off

Enable

1 (Originate)

SD goes high after the carrier level becomes lower than V

threshold.

off

MOTOROLA

MC145444

9

100

µF

0.1

µF

10 Ω

600 : 600

GNDA

FTLC

CDA

TxA2

TxA1

TIP

600 Ω

*

RING

0.1

µ

F

RxA

RxGC

RxBO

µF

TxD

RxD

SD

TLA

MCU

DATA

SCK

ENB

DSI

X1

3.57945 MHz

0.1 µF

X2

V

+ 5 V

CC

GND

LINE PROTECTION CIRCUIT

DIGITAL GROUND

ANALOG GROUND

*

Figure 5. Application Circuit

MC145444

10

MOTOROLA

PACKAGE DIMENSIONS

H SUFFIX

PLASTIC DIP

CASE 804–01

20

1

11

NOTES:

1. DIMENSIONING AND TOLERANCING PER ANSI

Y14.5M, 1982.

2. DIMENSION B DOES NOT INCLUDE MOLD

FLASH.

B

10

3. DIMENSION L TO CENTER OF LEADS WHEN

FORMED PARALLEL.

4. CONTROLLING DIMENSION: INCH.

L

–A–

INCHES

MILLIMETERS

DIM

A

B

C

D

F

G

H

J

K

L

M

N

MIN

MAX

0.970

0.260

0.170

0.022

0.070

MIN

23.63

6.10

3.81

0.38

1.27

2.54 BSC

0.76 NOM

0.23

2.93

7.62 BSC

0

0.51

MAX

24.63

6.60

4.31

0.56

1.78

C

K

0.930

0.240

0.150

0.015

0.050

0.100 BSC

0.030 NOM

0.009

SEATING

PLANE

–T–

H

N

M

G

F

J

0.013

0.140

0.33

3.55

0.115

0.300 BSC

0

D 20 PL

0.25 (0.010)

M

T

A

15

0.040

15

1.02

0.020

DW SUFFIX

SOG PACKAGE

CASE 751D–04

NOTES:

–A–

1. DIMENSIONING AND TOLERANCING PER

ANSI Y14.5M, 1982.

2. CONTROLLING DIMENSION: MILLIMETER.

3. DIMENSIONS A AND B DO NOT INCLUDE

MOLD PROTRUSION.

20

11

4. MAXIMUM MOLD PROTRUSION 0.150

(0.006) PER SIDE.

10X P

–B–

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.

M

0.010 (0.25)

B

1

10

MILLIMETERS

INCHES

20X D

0.010 (0.25)

DIM

A

B

C

D

MIN

12.65

7.40

2.35

0.35

0.50

MAX

12.95

7.60

2.65

0.49

0.90

MIN

MAX

0.510

0.299

0.104

0.019

0.035

J

0.499

0.292

0.093

0.014

0.020

M

S

T

A

B

F

G

J

K

M

P

R

1.27 BSC

0.050 BSC

0.25

0.10

0

0.32

0.25

7

0.010

0.004

0

0.012

0.009

7

R X 45

10.05

0.25

10.55

0.75

0.395

0.010

0.415

0.029

C

SEATING

PLANE

–T–

M

18X G

K

MOTOROLA

MC145444

11

Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representationorguaranteeregarding

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,

andspecificallydisclaimsanyandallliability, includingwithoutlimitationconsequentialorincidentaldamages. “Typical” parameters can and do vary in different

applications. 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 others. Motorola products are not designed, intended, or authorized for use as components in

systems intended for surgical implant into the body, or other 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 or death may occur. Should Buyer purchase or use Motorola products for any such

unintendedor unauthorized application, Buyer shall indemnify and hold Motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless

against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death

associated with such unintended or unauthorized use, even if such claim alleges that Motorola was negligent regarding the design or manufacture of the part.

Motorola and

are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer.

How to reach us:

USA/EUROPE: Motorola Literature Distribution;

JAPAN: Nippon Motorola Ltd.; Tatsumi–SPD–JLDC, Toshikatsu Otsuki,

P.O. Box 20912; Phoenix, Arizona 85036. 1–800–441–2447

6F Seibu–Butsuryu–Center, 3–14–2 Tatsumi Koto–Ku, Tokyo 135, Japan. 03–3521–8315

MFAX: RMFAX0@email.sps.mot.com – TOUCHTONE (602) 244–6609

INTERNET: http://Design–NET.com

HONG KONG: Motorola Semiconductors H.K. Ltd.; 8B Tai Ping Industrial Park,

51 Ting Kok Road, Tai Po, N.T., Hong Kong. 852–26629298

MC145444/D

◊

MC145444

12

MOTOROLA


型号：	MC14544BALD
厂家：	MOTOROLA
描述：	4000/14000/40000 SERIES, SEVEN SEGMENT DECODER/DRIVER, CONFIGURABLE OUTPUT, CDIP18, 726-04 调制解调器
文件：	总12页 (文件大小：165K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

MC14544BALD [MOTOROLA]

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