Calling Line Identifier
CMX602A
Notes
Min.
Typ.
Max.
Units
FSK Receiver
Transmission rate
1188
1280
2068
1188
2178
-40.0
1200
1300
2100
1200
2200
1212
1320
2132
1212
2222
-8.0
Baud
Hz
Hz
Hz
Hz
V23 Mark (logical 1) frequency
V23 Space (logical 0) frequency
Bell202 Mark (logical 1) frequency
Bell202 Space (logical 0) frequency
Valid input level range
4
dBV
Acceptable twist (mark level wrt space level)
V23
-7.0
-10.0
+7.0
+10.0
dB
dB
Bell202
Acceptable Signal to Noise ratio
V23
5
5
4
20.0
30.0
dB
dB
dBV
ms
Bell202
Level Detector 'on' threshold level
Level Detector 'off' to 'on' time (Fig 4 Teon)
Level Detector 'on' to 'off' time (Fig 4 Teoff)
-40.0
25.0
8.0
ms
Input Signal Amplifier
Input impedance
Voltage gain
7
10.0
MW
V/V
500
XTAL Input
'High' pulse width
'Low' pulse width
8
8
100
100
ns
ns
Notes:
1. At 25°C, not including any current drawn from the CMX602A pins by external circuitry
other than X1, C1 and C2.
2. RD, MODE, RXCK inputs at V , ZP input at V . See also Figure 11.
SS
DD
3. All conditions must be met to ensure detection.
4. For V = 5.0V with equal level tones and with the input signal amplifier external components
DD
as section 1.4. The internal threshold levels are proportional to V . To cater for other supply
DD
voltages or different signal level ranges the voltage gain of the input signal amplifier should be
adjusted by selecting the appropriate external components as described in section 1.5
5. Flat noise in 300 - 3400Hz band for V23, 200 - 3200Hz for Bell202.
6. Meeting any of these conditions will ensure non-detection.
7. Open loop, small signal low frequency measurements.
8. Timing for an external input to the CLOCK/XTAL pin.
ã 1998 Consumer Microcircuits Limited
21
D/602A/4
CMLMICRO [ CML MICROCIRCUITS ]
