MX375 Просмотр технического описания (PDF) - CML Microsystems Plc

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MX375

Pvt SQUELCH™ CTCSS Encoder/Decoder

CML Microsystems Plc 

PvtSQUELCHTM CTCSS Encoder/Decoder

12

Operating Characteristics Notes:

1. These values are obtained using the external integrating components given in Figure 2.

2. An emitter follower output

3. With an input signal of 1 kHz @ 0dB.

4. Under Composite Signal test conditions.

5. Any programmed tone with RL=600 Ω, CL=15pF, including any response to a phase reversal instruction.

6. f0 > 100 Hz, (for 100Hz > f0 > 67Hz: t = [100/f0(Hz)] x 250ms).

7. Input ac short-circuit, audio path enabled.

8. Due to frequency inversion, these figures reflect the difference from the ideal response.

9. Reference 156.7 Hz (MX175 and MX275).

6.2 Timing Information

6.2.1 Serial Loading

Serial Mode Enable Set Up Time

(tSMS)

Clock “High” Pulse Width (tPWH)

Clock “Low” Pulse Width (tPWL)

Data Set Up Time (tDS)

Data Hold Time (tDH)

Load/Latch Set Up Time (tLL)

Load/Latch Pulse Width (tLLW)

Min.

250

250

250

150

50

250

150

Typ.

-

-

-

-

-

-

-

Max.

-

-

-

-

-

-

-

Table 9: Serial Loading Timing Information

Unit

ns

ns

ns

ns

ns

ns

ns

MX375

D4

SERIAL MODE

ENABLE

D5

SERIAL CLOCK

SERIAL DATA

INPUT

LOAD/LATCH

t SMS

t DS

t PWH

t DH

t PWL

Figure 4: Serial Loading Timing

t LL

t LLW

© 1997 MX•COM Inc.

www.mxcom.com Tele: 800 638-5577 910 744-5050 Fax: 910 744-5054

Doc. # 20480026.007

4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA

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