Dual SPM Detector
Page 15 of 16
MX641 Preliminary Information
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
t
t
t
t
t
t
Serial Clock ‘High‘ Pulse Width
Serial Clock ‘Low’ Pulse Width
Serial Clock Period
250
250
600
450
50.0
250
ns
ns
ns
ns
ns
ns
PWH
PWL
CYC
CSE
DH
Chip Select ‘Low’ to Clock ‘High’ Edge
Data Hold Time
Data Setup Time
DS
tCSE
CHIP SELECT
tCYC
tCSH
SERIAL CLOCK
tDS
tDH
tPWL
tPWH
Don't
Care
Data
BIT D5
BIT D4
D3
SERIAL DATA
BIT D0
Figure 9: Data Load Timing for the Controlled Sensitivity Mode
ã2001 MX-COM, Inc.
www.mxcom.com tel: 800 638 5577 336 744 5050 fax: 336 744 5054
Doc. # 20480115.004
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
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