MC145446A Ver la hoja de datos (PDF) - Motorola => Freescale

Número de pieza

componentes Descripción

Fabricante

MC145446A

Single-Chip 300-Baud Modem with DTMF Transceiver

Motorola => Freescale 

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

Characteristic

Symbol

Conditions

Min

Typ

Input Impedance

50

—

Detect Signal Level (Each Tone)

– 48

—

Twist (High Group Tone/Low Group Tone

– 10

—

Frequency Detect Band Width (Figure 4)

± 1.5% ± 2 Hz

—

Frequency No–Detect Band Width (Figure 4)

—

—

DTMF Detect Timing

OFF to ON

TCDON

CD1 = 0, CD0 = 1

CD1 = 1, CD0 = 0

—

25

—

30

CD1 = 1, CD0 = 1

—

40

ON to OFF

TCDOFF CD1 = 0, CD0 = 1

CD1 = 1, CD0 = 0

—

25

—

35

CD1 = 1, CD0 = 1

—

25

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

Characteristic

Symbol

Conditions

Min

Bit Bias

Bit Error Rate

(CCITT Line Simulation, 511–Bit Pattern)

ID

Input Level = – 24 dBm

—

BER

S/N = 4 dB

—

Typ

5

0.00001

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

Characteristic

Timing

Diagram

Reference

Symbol

No.

Min

Typ

Input Pulse Width (H) E, SCK

Input Pulse Width (L) E, SCK

Clock Cycle

Input Rise Time

Input Fall Time

Recovery Time E to SCK

Setup Time

twh

1

50

—

twl

2

50

—

tc

3

100

—

tr

4

—

—

tf

5

—

—

trec

6, 18

50

—

DATA to SCK

tsu

7

50

—

R/W↓ to DATA

9

100

—

R/W↑ to DATA

12

50

—

Hold Time

SCK to DATA

th

E to R/W

8

50

—

10

50

—

DATA to R/W

14

50

—

R/W to DATA

15

50

—

Read Data Delay Time

E to DATA

td

SCK to DATA

13

—

—

17

—

—

Enable Minimum Interval

Mode Switch Minimum Interval

twe

11

twm

16

—

—

—

—

Max

—

0

10

—

± 3.5

—

—

—

—

—

—

Max

—

—

Max

—

—

—

2

2

—

—

—

—

—

—

—

—

50

50

450

600

Unit

kΩ

dBm

dB

—

%

ms

Unit

%

—

Unit

ns

ns

ns

µs

µs

ns

ns

ns

ns

ns

ns

ns

ns

ns

ns

ns

ns

MOTOROLA

MC145446A

5

Share Link: