MT88E45
Advance Information
DC Electrical Characteristics† (continued)
Characteristics
Sym
Min
Typ‡
Max
Units
Test Conditions
DCLK
DATA
DR/STD
CD, EST
ST/GT
8
9
Output Low Sink
Current
IOL
2
mA
VOL=0.1*VDD
IN1+
IN1-
IN2+
IN2-
Input Current
Iin1
Iin2
Ioz1
1
10
5
µA
µA
µA
Vin=VDD to VSS
Vin=VDD to VSS
DCLK
CB0
CB1
CB2
GT
10
Output High-
Impedance Current
Vout =VDD to VSS
No Load
V
11
12
13
Output Voltage
VREF
0.5VDD -0.1
0.5VDD+0.1
2
V
kΩ
V
REF
Output Resistance
RREF
GT
Comparator
VTGt 0.5VDD-0.05
0.5VDD+0.05
Threshold Voltage
† DC Electrical Characteristics are over recommended operating conditions, unless otherwise stated.
o
‡ Typical figures are at 25 C and are for design aid only: not guaranteed and not subject to production testing.
†
AC Electrical Characteristics - CAS Detection
Characteristic
Sym
Min
Typ‡
Max
Unit
Notes*
1
2
Lower Tone Frequency
Upper Tone Frequency
fL
2130
2750
Hz
Hz
fH
range within which
tones are
3
4
Frequency Deviation: Accept
Frequency Deviation: Reject
1.1%
3.5%
accepted
range outside of
which tones are
rejected
Accept Signal Level (per
tone)
-40
-37.78
-2
0.22
dBV
dBm
5
6
7
1, 5, 6
2, 5, 6
1, 5, 6
Reject Signal Level (per tone)
Vdd=5V +/-10%
-46
-43.78
dBV
dBm
Reject Signal Level (per tone)
Vdd=3V+/-10%, 5V+/-10%
-47.22
-45
dBV
dBm
8
9
Twist: 20 log (V2130Hz/V2750Hz
Signal to Noise Ratio
)
-7
+7
dB
dB
SNRCAS
20
3,4
† AC Electrical Characteristics are over recommended operating conditions, unless otherwise stated.
o
‡ Typical figures are at 25 C and are for design aid only: not guaranteed and not subject to production testing
*Notes:
1. Tip/Ring signal level. Input op-amp configured to 0dB gain at Vdd=5V+/-10%, -3.5dB at Vdd=3V+/-10%.
2. Tip/Ring signal level. Input op-amp configured to 0dB gain at Vdd=5V+/-10%.
3. Both tones have the same amplitude.
4. Band limited random noise 300-3400Hz. Measurement valid only when tone is present.
5. dBV - Decibels above or below a reference voltage of 1 Vrms. 0 dBV = 1 Vrms. Signal level is per tone.
6. dBm - Decibels above or below a reference power of 1 mW into 600 ohms. 0 dBm = 0.7746 Vrms. Signal level is per tone.
16
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