CMX624P4 View Datasheet(PDF) - CML Microsystems Plc
Part Name
Description
MFG CO.
'CMX624P4' PDF : 26 Pages View PDF
V23 / Bell 202 Modem
CMX624
Rx Energy Detector
‘Off’ to 'On' Threshold Level (FSK)
‘Off’ to 'On' Threshold Level (Call Progress)
Hysteresis (measured at VDD = 3V and 5V)
'Off' to 'On' Time (Figure 4 Teon):
1200bps Rx mode
75/150bps Rx mode
Call Progress Detect mode
'On' to 'Off' Time (Figure 4 Teoff):
1200bps Rx mode
75/150bps Rx mode
Call Progress Detect mode
Notes
6, 10
6, 10
6, 10
6, 10
6, 10
Min.
-48.0
-48.0
2.0
-
-
-
8.0
20
20
Typ.
-
-
-
-
-
-
-
-
-
Max.
-43.0
-40.0
-
25
48
48
-
-
-
Unit
dBm
dBm
dB
ms
ms
ms
ms
ms
ms
Notes:
10. Measured with 1300Hz signal in 1200bps mode, 390Hz for 75 or 150 bps and Call
Progress mode, signal level -33dBm for time delay measurements.
XTAL/CLOCK Input
'High' Pulse Width
'Low' Pulse Width
Notes
11
11
Min.
100
100
Notes: 11. Timing for an external input to the XTAL/CLOCK pin.
Typ.
-
-
Max.
-
-
Unit
ns
ns
‘C-BUS’ Timings (See Figure 10)
tCSE
CSN-Enable to Clock-High time
tCSH
Last Clock-High to CSN-High time
tLOZ
Clock-Low to Reply Output enable time
tHIZ
CSN-High to Reply Output 3-state time
tCSOFF CSN-High Time between transactions
tNXT
Inter-Byte Time
tCK
Clock-Cycle time
tCH
Serial Clock-High time
tCL
Serial Clock-Low time
tCDS
Command Data Set-Up time
tCDH
Command Data Hold time
tRDS
Reply Data Set-Up time
tRDH
Reply Data Hold time
Notes
Min.
100
100
0.0
-
1.0
200
200
100
100
75
25
50
0
Typ.
-
-
-
-
-
-
-
-
-
-
-
-
-
Max. Unit
-
ns
-
ns
-
ns
1.0
µs
-
µs
-
ns
-
ns
-
ns
-
ns
-
ns
-
ns
-
ns
-
ns
Note: These timings are for the latest version of the ‘C-BUS’ as embodied in the CMX624.
2003 CML Microsystems Plc
22
D/624/7
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