Dual SPM Detector
Page 14 of 16
MX641 Preliminary Information
Notes
Min.
Typ.
Max.
Units
Channel Outputs
Output Logic ‘1’
I
= 120mA
(Enabled)
1
4.6
V
OH
Output Logic ‘0’
I
OL
= 360mA (Enabled)
High-Z Output
1
2
0.4
5.0
V
Output Leakage Current
Input Amplifier
-5.0
60.0
1.0
µA
D. C. Gain
dB
Hz
Bandwidth (-3dB)
100
Input Impedance
MΩ
Overall Performance
12kHz Detect Bandwidth
12kHz Not-detect Frequencies
12kHz Not-detect Frequencies
16kHz Detect Bandwidth
16kHz Upper Decode Band Edge
16kHz Lower Decode Band Edge
Level Sensitivity
3
3
3
3
3
3
11.82
12.18
11.52
kHz
kHz
kHz
(Below 12kHz)
(Above 12kHz)
12.48
15.76
16.24
15.36
(Below 16kHz)
(Above 16kHz)
kHz
kHz
16.64
Controlled Sensitivity Mode
Preset Sensitivity Mode
Signal Quality Requirements
Signal-to-Noise
3,4,12,15
3,4,5,16
2.6
1.6
0.6
dB(ref.)
-25.4 -26.4 -27.4 dB(ref.)
(Amp Input) 4,8,9,10
(Amp Input) 4,8,9,11
(Amp Output) 4,8,10,11
22.0
20.0
dB
dB
dB
Signal-to-Voice
-36.0 -40.0
-1.0
Signal-to-Voice
-27.0
Channel Outputs
(Ch1 and Ch2) Figure
4
Mode Change Time
6
500
ns
Tone Follower Mode (Table 3)
Response and De-Response
Time
3, 4, 7
10.0
ms
Packet Mode (Table 3)
Response and De-Response
Time
3, 4, 7
40.0
48.0
ms
Note:
1. Tone Follower or Packet mode enabled; see Table 3
2. Tristate selected; see Table 3.
3. With adherence to Signal-to-Voice and Signal-to Noise specifications.
4. 12kHz and/or 16kHz system.
5. With Input Amp gain setting = 0dB.
6. Time taken to change between any two of the operational modes: Tone Follower, Packet or Tristate,
and with a maximum capacitive load of 30pF on an output.
7. The time delay, after a valid serial data load (or after device powerup), before the condition of the
outputs can be guaranteed correct.
8. Immunity to false responses and/or de-responses.
9. Common Mode SPM and balanced voice input signal.
10. With SPM and voice signal amplitudes balanced; to avoid false de-responses due to saturation, the
peak-to-peak voice + noise level at the output of the Input Amp should be no greater than the dynamic
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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