MT88L85 Datasheet, PDF (16/20 Pages) Mitel Networks Corporation – 3V Integrated DTMFTransceiver with Power Down & Adaptive Micro Interface

MT88L85
Advance Information
AC Electrical Characteristics^†- Call Progress - Voltages are with respect to ground (V_SS), unless otherwise stated.
Characteristics
Sym Min Typ^‡ Max Units
Conditions
1 Accept Bandwidth
f_A
310
500 Hz @ -25 dBm,
Note 9
2 Lower freq. (REJECT)
f_LR
290
Hz @ -25 dBm
3 Upper freq. (REJECT)
f_HR
540
Hz @ -25 dBm
4 Call progress tone detect level (total
-30
power)
dBm
† Characteristics are over recommended operating conditions unless otherwise stated
‡ Typical figures are at 25°C, V_DD=3V, and for design aid only: not guaranteed and not subject to production testing
AC Electrical Characteristics^†- DTMF Reception - Typical DTMF tone accept and reject requirements. Actual
values are user selectable as per Figures 5, 6 and 7.
Characteristics
Sym Min Typ^‡ Max Units
Conditions
1 Minimum tone accept duration
t_REC
40
ms
2 Maximum tone reject duration
t_REC
20
ms
3 Minimum interdigit pause duration
t_ID
40
ms
4 Maximum tone drop-out duration
t_OD
20
ms
† Characteristics are over recommended operating conditions unless otherwise stated
‡ Typical figures are at 25°C, V_DD=3V, and for design aid only: not guaranteed and not subject to production testing
AC Electrical Characteristics^† - Voltages are with respect to ground (V_SS), unless otherwise stated.
Characteristics
Sym Min Typ^‡ Max Units
Conditions
1 ^T Tone present detect time
O
2 _N Tone absent detect time
3 ^E Delay St to b3
4
I
N
Delay St to RX₀-RX₃
t_DP
5
11
14
ms
t_DA
0.5
4
8.5
ms
t_PStb3
13
µs
t_PStRX
8
µs
5
Tone burst duration
t_BST
50
52
ms
6
Tone pause duration
t_PS
50
52
ms
7
Tone burst duration (extended)
t_BSTE
100
104 ms
8 T Tone pause duration (extended)
O
9 _N High group output level
10 ^E Low group output level
t_PSE
V_HOUT
V_LOUT
100
-15.1
-17.1
104
-11.1
-13.1
ms
dBm
dBm
11 ^O Pre-emphasis
U
dB_P
2
dB
12 T Output distortion (Single Tone)
THD
-35
dB
13
14
Frequency deviation
f_D
±0.7 ±1.5
%
15
Output load resistance
R_LT
10
50
kΩ
16
Crystal/clock frequency
17
X
T
Clock input rise and fall time
18 ^A Clock input duty cycle
L
19
Capacitive load (OSC2)
f_C
t_CLRF
DC_CL
C_LO
3.5759 3.5795 3.5831
110
40
50
60
30
MHz
ns
%
pF
† Timing is over recommended temperature & power supply voltages.
‡ Typical figures are at 25°C and for design aid only: not guaranteed and not subject to production testing.
Note 11
Note 11
See Figure 7
See Figure 7
DTMF mode
DTMF mode
Call Progress mode
Call Progress mode
R_L=10kΩ
R_L=10kΩ
R_L=10kΩ
25 kHz Bandwidth
R_L=10kΩ
f_C=3.579545 MHz
Ext. clock
Ext. clock
4-86