Specification ......
Characteristics
See Note
Min.
Typ.
Max.
Unit
CTCSS – Encode
Frequency Range
Tone Frequency Resolution
Tone Amplitude Tolerance
Rise Time
Fall Time
Total Harmonic Distortion
65.0
–
-1.0
–
–
–
257
0.2
+1.0
30.0
50.0
5.0
Hz
%
dB
ms
ms
%
–
–
–
–
–
(to 90%)
(to 10%)
NRZ – Decode
Rx Bit-Rate Sync Time
Rx Bit Error Rate
–
–
2
–
–
edges
P(error)
11
1 x 10-3
NRZ – Tx
Tx Bit Rate
67.0
75
–
–
300
300
bits/s
Hz
Tx LPF (3dB) Bandwidth
Sub-Audio Tx Output Level
CTCSS
–
–
0
–
–
2.58
–
dB
V p-p
dB
NRZ
0.871
Amplitude Adjustment Range
Adjustment Step Size (7 steps)
-2.58
–
8
0.86
dB
Sub-Audio Bandstop Filter
Passband
297
–
-1.5
3000
–
+0.5
Hz
dB
dB
Passband Gain
0
–
Passband Gain (w.r.t. gain at 1.0kHz)
Stopband Attenuation
at 250 Hz
at 150 Hz
at 100 Hz
Residual Hum and Noise
Alias Frequency
–
–
–
–
–
36.0
24.0
18.0
-50.0
–
–
–
–
dB
dB
dB
dBp
kHz
-46.0
62.5
Xtal/Clock Frequency (fXTAL
)
3.9
–
4.1
MHz
Notes
1.
2.
Device control pins; Serial Clock, Command Data, Wake and CS.
Reply Data output.
3.
Reply Data and IRQ outputs.
4.
5.
Leakage current into the “Off” IRQ output.
See Control Register.
6.
7.
With Input gain components set as recommended in Figure 2.
Probability 0.97
8.
See Gain-Set Register, Table 7 - Bits 0, 1, 2 and 3.
9.
10.
11.
For fCTCSS IN of 65Hz to 100Hz, Response Time tR = (100/fTONE) x 250 ms.
Distributed across the Rx frequency band.
With 10dB signal-to-noise ratio in a bit-rate bandwidth.
15
CMLMICRO [ CML MICROCIRCUITS ]
