MC145446A datasheet(7/14 Pages) MOTOROLA

部件名	MC145446A

功能描述	SINGLE-CHIP 300-BAUD MODEM WITH DTMF TRANSCEIVER

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制造商	MOTOROLA [Motorola, Inc]

网页	http://www.freescale.com

标志

7 / 14 page

MC145446A

MOTOROLA

7

Figure 2. Out–of–Band Energy

– 55

– 15 dB/OCT.

f (Hz)

256 k

16 k

4 k

3.4 k

0

– 25

Figure 3. FSK, DTMF Carrier Detect Timing

Von

Voff

RxA, DTMF IN

SD/DV/CD

toff

ton

Figure 4. DTMF Frequency Detect Bandwidth

NO–DETECT

DETECT MINIMUM

WIDTH

NO–DETECT

– 3.5%

– 1.5% – 2 Hz

+ 1.5% + 2 Hz

+ 3.5%

fo

类似零件编号 - MC145446A

制造商	部件名	数据表	功能描述
Motorola, Inc	MC145444	165Kb / 12P	Single-Chip 300-Baud Modem
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