Call Progress Tone Detector
FX643
Operating Characteristics
For the following conditions unless otherwise specified:
Xtal Frequency = 3.579545MHz, S/N = 16 dB, Noise Bandwidth = 5 kHz,
V
DD = 3.3V to 5.0V, Tamb = - 40°C to +85°C. 0dB = 775mVrms.
Notes
Min.
Typ.
Max.
Units
DC Parameters
IDD (ENABLE = "1")
IDD (ENABLE = "1")
(VDD = 5.0V)
(VDD = 3.3V)
1
1
0.5
0.3
1.0
0.7
mA
mA
AC Parameters
SIGIN pin
Input Impedance (at 100Hz)
Minimum Input Signal Level
Input Signal Dynamic Range
Signal to Noise Ratio
2
3
3
0.35
-40
MW
dB
dB
40
16
dB
Clock Input
'High' Pulse Width
'Low' Pulse Width
Input Impedance (at 100Hz)
Gain (I/P = 1mV rms at 100Hz)
4
4
40
40
10
20
ns
ns
MW
dB
Logic Interface
Input Logic "1" Level
Input Logic "0" Level
Input Leakage Current (Vin = 0 to VDD
Input Capacitance
Output Logic "1" Level (lOH = 120µA)
Output Logic "0" Level (lOL = 360µA)
5
5
5
5
6
6
80%
5.0
VDD
VDD
µA
pF
VDD
VDD
20%
+5.0
)
10.0
90%
10%
Notes:
1. Not including any current drawn from the device pins by external circuitry.
2. Small signal impedance over the frequency range 100Hz to 2000Hz and at 5.0V.
3. The input level is not critical as the detector uses a stochastic algorithm.
4. Timing for an external input to the XTAL/CLOCK pin.
5. ENABLE pin.
6. DETECT1, DETECT2 and DETECT3 pins.
ã 1996 Consumer Microcircuits Limited
10
D/643/4
CMLMICRO [ CML MICROCIRCUITS ]
