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MT8870DS1-1

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P19
MT8870D/MT8870D-1 Data Sheet
13
Zarlink Semiconductor Inc.
‡ 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.
MT8870D-1 AC Electrical Characteristics -V
DD
=5.0V±5%, V
SS
=0V, -40°C ≤ T
O
≤ +85°C, using Test Circuit shown in Figure 10.
Characteristics Sym. Min. Typ.
‡
Max. Units Notes*
1
Valid input signal levels (each
tone of composite signal)
-31 +1 dBm Tested at
V
DD
=5.0 V
1,2,3,5,6,9
21.8 869 mV
RMS
2 Input Signal Level Reject
-37 dBm Tested at
V
DD
=5.0 V
1,2,3,5,6,9
10.9 mV
RMS
3 Negative twist accept 8 dB 2,3,6,9,13
4 Positive twist accept 8 dB 2,3,6,9,13
5 Frequency deviation accept ±1.5%± 2 Hz 2,3,5,9
6 Frequency deviation reject ±3.5% 2,3,5,9
7 Third zone tolerance -18.5 dB 2,3,4,5,9,12
8 Noise tolerance -12 dB 2,3,4,5,7,9,10
9 Dial tone tolerance +22 dB 2,3,4,5,8,9,11
MT8870D/MT8870D-1 Data Sheet
14
Zarlink Semiconductor Inc.
‡ Typical figures are at 25°C and are for design aid only: not guaranteed and not subject to production testing.
*NOTES:
1. Used for guard-time calculation purposes only.
2. These, user adjustable parameters, are not device specifications. The adjustable settings of these minimums and maximums
are recommendations based upon network requirements.
3. With valid tone present at input, t
PU
equals time from PDWN going low until ESt going high.
AC Electrical Characteristics - V
DD
=5.0V±5%, V
SS
=0V, -40°C ≤ To ≤ +85°C, using Test Circuit shown in Figure 10.
Characteristics Sym. Min. Typ.
‡
Max. Units Conditions
1
T
I
M
I
N
G
Tone present detect time t
DP
51114msNote 1
2 Tone absent detect time t
DA
0.5 4 8.5 ms Note 1
3 Tone duration accept t
REC
40 ms Note 2
4 Tone duration reject t
REC
20 ms Note 2
5 Interdigit pause accept t
ID
40 ms Note 2
6 Interdigit pause reject t
DO
20 ms Note 2
7
O
U
T
P
U
T
S
Propagation delay (St to Q) t
PQ
811µsTOE=V
DD
8 Propagation delay (St to StD) t
PStD
12 16 µsTOE=V
DD
9 Output data set up (Q to StD) t
QStD
3.4 µsTOE=V
DD
10 Propagation delay (TOE to Q
ENABLE)
t
PTE
50 ns load of 10 kΩ,
50 pF
11 Propagation delay (TOE to Q
DISABLE)
t
PTD
300 ns load of 10 kΩ,
50 pF
12
P
D
W
N
Power-up time t
PU
30 ms Note 3
13 Power-down time t
PD
20 ms
14
C
L
O
C
K
Crystal/clock frequency f
C
3.575
9
3.579
5
3.583
1
MHz
15 Clock input rise time t
LHCL
110 ns Ext. clock
16 Clock input fall time t
HLCL
110 ns Ext. clock
17 Clock input duty cycle DC
CL
40 50 60 % Ext. clock
18 Capacitive load (OSC2) C
LO
30 pF
MT8870D/MT8870D-1 Data Sheet
15
Zarlink Semiconductor Inc.
Figure 10 - Single-Ended Input Configuration
IN+
IN-
GS
V
Ref
INH
PDWN
OSC 1
OSC 2
V
SS
TOE
V
DD
St/GT
ESt
StD
Q4
Q3
Q2
Q1
DTMF
Input
C
1
R
1
R
2
X-tal
V
DD
C
2
R
3
NOTES:
R
1
,R
2
=100 KΩ ± 1%
R
3
=300 KΩ ± 1%
C
1
,C
2
=100 nF ± 5%
X-tal=3.579545 MHz ± 0.1%
MT8870D/MT8870D-1
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P19

MT8870DS1-1

Mfr. #:
Buy MT8870DS1-1
Manufacturer:
Microchip / Microsemi
Description:
Telecom Interface ICs Pb Free DTMF RECEIVER PREMIUM SOIC
Lifecycle:
New from this manufacturer.
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