Dual SPM Detector

Page 15 of 16

MX641 Preliminary Information

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range of the device. For this reason, the signal-to-voice figure at the AMP Output will vary with the

sensitivity setting. The lowest

signal-to-voice figure occurs at the highest sensitivity setting. (Table 4 27dB)

11. Maximum voice frequencies = 3.4kHz.

12. With the Input Amplifier gain at 0dB and the Bandpass Filter gain set at 0dB (Table 4); subtract 1.0dB

from this specification for each extra single dB of Bandpass Filter gain programmed.

Alternatively, with the input components as recommended in Figure 2, the sensitivity is as defined in

Table 4.

13. Logic inputs with no internal pull-up; Chip Select, Serial Data, Serial Clock, Output Enable, Output

Select and Clock In pins.

14. Logic inputs with an internal pull-up; Preset Level and System Select pins.

15. Preset Level = ‘0’, System Select = don't care; Chip Select, Serial Clock and Serial Data inputs active;

see Table 3.

16. Preset Level = ‘1’, System Select = input active; Chip Select, Serial Clock and Serial Data inputs

inactive;

see Table 3

17. Maximum Clock Output Fan out = 4 (including master)

6.2

Timing

Parameter

Min.

Typ.

Max.

Unit

Serial Clock ‘High‘ Pulse Width

250

ns

Serial Clock ‘Low’ Pulse Width

250

ns

Serial Clock Period

600

ns

Chip Select ‘Low’ to Clock ‘High’ Edge

450

ns

Data Hold Time

50.0

ns

Data Setup Time

250

ns

SERIAL CLOCK

SERIAL DATA

CHIP SELECT

t

CSE

t

CYC

t

PWH

t

PWL

t

DH

t

DS

BIT D5

BIT D4

BIT D0

D3

t

CSH

Don't

Care

Data

Figure 9: Data Load Timing for the Controlled Sensitivity Mode