Motorola MC145444H, MC145444DW Datasheet

MC145444MOTOROLA

1

Advance Information

  

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.

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.

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

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

• 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

• Compatible with CCITT V.21

• 2100 Hz Answer Tone Generator On–Chip

• Analog Loopback Configuration for Self Test

• Simplex, Half–Duplex, and Full–Duplex Operation

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

Order this document

by MC145444/D



SEMICONDUCTOR TECHNICAL DATA



H SUFFIX

PLASTIC DIP

CASE 804

DW SUFFIX

SOG PACKAGE

CASE 751D

20

1

20

1

TLA

CDA

GNDA

FTLC

RxBO

RxD

SD

X2

X1

GND 5

4

3

2

1

10

9

8

7

6

14

15

16

17

18

19

20

11

12

13

DSI

TxA2

TxA1

RxA

RxGC

TxD

DATA

SCK

ENB

V

CC

PIN ASSIGNMENT

ORDERING INFORMATION

MC145444P Plastic DIP
MC145444DW SOG Package

 Motorola, Inc. 1995

REV 0
8/95

MC145444 MOTOROLA
2

MUX

15–BIT
LATCH

ANALOG GROUND

GENERAT OR

BLOCK DIAGRAM

+

+

_

– 1

FSK

DEMODULATOR

SMOOTHING

FILTER

MUX

CARRIER/CPT

DETECTOR

FSK

MODULA TOR

DTMF

GENERATOR

LEVEL

CONTROL

CONTROL

LOGIC

15–BIT

SHIFT REGISTER

POWER–ON

RESET

CLOCK

GENERAT OR

ANTI–ALIAS

FILTER

LOW–BAND

BPF

HIGH–BAND

BPF

MUX/

MIXING

AC AMP

MUX

S/H

Rf

R

FTLC

X1 X2 GND V

CC

GNDA

RxBO

RxA

RxGC

TxD

TLA

ENB

DATA

SCK

RxD

SD
CDA

DSI

TxA1

TxA2

–

65 k

20 k

30 k

MAXIMUM RATINGS* (Voltages Referenced to V

SS

)

Rating

Symbol Value Unit

DC Supply Voltage V

CC

– 0.5 to + 7.0 V

DC Input Voltage V

in

– 0.5 to VCC + 0.5 V

DC Output Voltage V

out

– 0.5 to VCC + 0.5 V

Clamp Diode Current per Pin IIK, I

OK

± 20 mA

DC Current per Pin I

out

± 25 mA

Power Dissipation P

D

500 mW

Storage Temperature Range T

stg

– 65 to + 150 °C

RECOMMENDED OPERATING CONDITIONS

Parameter Symbol Min Typ Max Unit

DC Supply Voltage V

CC

4.5 5 5.5 V

DC Input Voltage V

in

0 — V

CC

V

DC Output Voltage V

out

0 — V

CC

V

Input Rise Time t

r

0 — 500 ns

Input Fall Time t

f

0 — 500 ns

Crystal Frequency f

osc

— 3.579545 — MHz

Operating Temperature Range T

A

– 20 25 70 °C

MC145444MOTOROLA

3

DC ELECTRICAL CHARACTERISTICS (V

CC

= + 5.0 V ± 10%, TA = – 20 to + 70°C)

Characteristic Symbol Conditions Min Typ Max Unit

Input Voltage

H Level V

IH

3.15 — — V

L Level V

IL

— — 1.1

Output Voltage

H Level V

OH

IOH = 20 µA VCC – 0.1 VCC – 0.01 — V

L Level V

OL

IOL = 20 µA
IOL = 2 mA

—
—

0.01
—

0.1

0.4

Input Current DATA, SCK, E, TxD I

in

Vin = VCC or GND — ± 1.0 ± 10.0 µA

Quiescent Supply Current I

CC

FSK Mode — 8 — mA

–

I

CC

Power–Down Mode 1 — — 300 µA

Power–Down Supply Current

I

CC

Power–Down Mode 2 — — 1 µA

TRANSMIT CARRIER CHARACTERISTICS (V

CC

= + 5.0 V ± 10%, TA = – 20 to + 70°C)

Characteristic

Symbol Conditions Min Typ Max Unit

Carrier Frequency Channel 1

Mark ‘‘1’’ f

1M

974 980 986 Hz

Space ‘‘0’’ f

1S

1174 1180 1186

Carrier Frequency Channel 2

Mark ‘‘1’’ f

2M

Crystal Frequency

3.579545 MHz

1644 1650 1656

Space ‘‘0’’ f

2S

3.579545 MHz

1844 1850 1856

Answer Tone f

ans

2094 2100 2106

Transmit Carrier Level VO*

— 6 — dBm

Second Harmonic Energy V2h*

Attenuator = 0 dB
RTLA = ∞

— – 46 — dBm

Out–of–Band Energy VOE*

RTLA = ∞

Figure 1 dBm

*V

TXA1

– V

TXA2

, RL = 1.2 kΩ

TRANSMIT ATTENUATOR CHARACTERISTICS (V

CC

= + 5.0 V ± 10%, TA = – 20 to + 70°C)

Characteristic Symbol Conditions Min Typ Max Unit

Attenuator Range A

RNG

0 — 15 dB

Attenuator Accuracy A

ACC

– 0.5 — + 0.5 dB

RECEIVER CHARACTERISTICS (Includes Hybrid, Demodulator and Carrier Detector)

(VCC = + 5.0 V ± 10%, TA = – 20 to + 70°C)

Characteristic

Symbol Conditions Min Typ Max Unit

Input Impedance R

IRX

RxA Pin (Pin 19) 50 — — kΩ

Receiver Carrier Amplitude V

IRX

– 48 — – 12 dBm

Carrier Detect OFF to ON V

CDON

CDA = 1.2 V

— – 44 — dBm

Threshold ON to OFF V

CDOF

fin = 1.0 kHz

— – 47 —

Hysterisis (V

CDON

– V

CCDOF

) H

VS

2 — — dB

Carrier Detect Timing OFF to ON

CD1 = 0, CD0 = 0 — 450 — ms
CD1 = 0, CD0 = 1 — 15 —

T

CDON

CD1 = 0, CD1 = 1 — 15 —
CD1 = 1, CD0 = 1 — 80 —

ON to OFF

CD1 = 0, CD0 = 0 — 30 —
CD1 = 0, CD0 = 1 — 30 —

T

CDOFF

CD1 = 0, CD0 = 1 — 15 —
CD1 = 1, CD0 = 1 — 10 —

MC145444 MOTOROLA
4

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

CC

= + 5.0 V ± 10%, TA = – 20 to + 70°C)

Characteristic Symbol Conditions Min Typ Max Unit

FTLC Output Impedance R

OFT

10 — 50 kΩ

Adjacent Channel Rejection REJ V

RXA

= – 12 dBm — 50 — dB

Pass–Band Gain G

PAS

— 10 — dB

Group Delay

Low–Band Filter
930 – 1230 Hz

— 700 —

µs

High–Band Filter
1600 – 1900 Hz

— 800 —

DTMF CHARACTERISTICS (V

CC

= + 5.0 V ± 10%, TA = – 20 to + 70°C)

Characteristic Symbol Conditions Min Typ Max Unit

Tone Output Level

Low Group Vfl* — 3 — dBm

High Group Vfh*

— 4 —

High Group Pre Emphasis P

E

Attenuator = 0 dB

0 — 3 dB

DTMF Distortion DIST

RTLA = ∞
Crystal Frequency

— 5 — %

DTMF Frequency Variation ∆f

V

Crystal Frequency

3.579545 MHz

– 1 — 1 %
Out–of–Band Energy VOE* Figure 1 dB
Setup Time t

osc

— 4 — ms

*V

TXA1

– V

TXA2

, RL = 1.2 kΩ

CPTD CHARACTERISTICS (V

CC

= + 5.0 V ± 10%, TA = – 20 to + 70°C)

Characteristic

Symbol Conditions Min Typ Max Unit

Band–Pass Filter Center Frequency f

c

— 400 — Hz

Band–Pass Filter – 3 dB Band Width ∆

BW

— 140 — Hz

Tone Detect Level

OFF to ON V

TDON

— – 44 — dBm

ON to OFF V

TDOF

CDA = 1.2 V

— – 47 —

Tone Detect Timing

OFF to ON T

TDON

fin = 400 Hz

— 10 — ms

ON to OFF T

TDOF

— 25 —

DEMODULATOR CHARACTERISTICS (V

CC

= + 5.0 V ± 10%, TA = – 20 to + 70°C)

Characteristic Symbol Conditions Min Typ Max Unit

Bit Bias ID Input Level = – 24 dBm — 5 — %
Bit Error Rate BER Input Level = – 24 dBm

CCITT Line Simulation
511 Bit Pattern
S/N = 5 dB

— 0.00001 — —

SWITCHING CHARACTERISTICS (V

CC

= + 5.0 V ± 10%, TA = – 20 to + 70°C)

Characteristic Symbol Conditions Min Typ Max Unit

Setup Times DATA to SCK t

su

50 — — ns

SCK to ENB 50 — — ns

Hold Time SCK to DATA t

h

50 — — ns

Recovery Time ENB to SCK t

rec

50 — — ns

Input Rise Time t

r

— — 2 µs

Input Fall Time t

f

— — 2 µs

Input Pulse Width ENB, SCK t

w

50 — — ns