MT8870D/MT8870D-1
Data Sheet
MT8870D-1 AC Electrical Characteristics -VDD=5.0V±5%, VSS=0V, -40°C ≤ TO ≤ +85°C, using Test Circuit shown in Figure 10.
Characteristics
Sym.
Min.
Typ.‡ Max.
Units
Notes*
Tested at
-31
+1
dBm
Valid input signal levels (each
tone of composite signal)
1
2
VDD=5.0 V
21.8
869
mVRMS
1,2,3,5,6,9
-37
dBm
Tested at
Input Signal Level Reject
VDD=5.0 V
1,2,3,5,6,9
10.9
mVRMS
3
4
5
6
7
8
9
Negative twist accept
Positive twist accept
Frequency deviation accept
Frequency deviation reject
Third zone tolerance
Noise tolerance
8
8
dB
dB
2,3,6,9,13
2,3,6,9,13
2,3,5,9
±1.5%± 2 Hz
±3.5%
2,3,5,9
-18.5
-12
dB
dB
dB
2,3,4,5,9,12
2,3,4,5,7,9,10
2,3,4,5,8,9,11
Dial tone tolerance
+22
‡ Typical figures are at 25 °C and are for design aid only: not guaranteed and not subject to production testing.
*NOTES
1. dBm= decibels above or below a reference power of 1 mW into a 600 ohm load.
2. Digit sequence consists of all DTMF tones.
3. Tone duration= 40 ms, tone pause= 40 ms.
4. Signal condition consists of nominal DTMF frequencies.
5. Both tones in composite signal have an equal amplitude.
6. Tone pair is deviated by ±1.5%± 2 Hz.
7. Bandwidth limited (3 kHz) Gaussian noise.
8. The precise dial tone frequencies are (350 Hz and 440 Hz) ± 2%.
9. For an error rate of better than 1 in 10,000.
10. Referenced to lowest level frequency component in DTMF signal.
11. Referenced to the minimum valid accept level.
12. Referenced to Fig. 10 input DTMF tone level at -25dBm (-28dBm at GS Pin) interference frequency range between 480-3400Hz.
13. Guaranteed by design and characterization.
13
Zarlink Semiconductor Inc.
ZARLINK [ ZARLINK SEMICONDUCTOR INC ]
