EM78808
8-bit Micro-controller
Differential Energy Detector (DED) (Ta=25°C, VDD=5.0V±5%, VSS=0V)
Symbol
EGIN1
EGIN2
Parameter
Condition
Min
Typ Max Unit
Operating current for SED SEDCLK bit = 0
Operating current for SED SEDCLK bit = 0
20
20
25
25
UA
UA
X. AC Electrical Characteristic
CPU instruction timing (Ta=25°C, VDD=5V, VSS=0V)
Parameter
Input CLK duty cycle
Instruction cycle time
Symbol Condition
Dclk
Min
45
Typ
50
60
550
16
Max
55
Unit
%
us
ns
ms
ns
ms
Tins
32.768kHz
3.579MHz
Device delay hold time
TCC input period
Watchdog timer period
Tdrh
Ttcc
Twdt
Note 1
Ta = 25°C
(Tins+20)/N
16
Note 1: N= selected prescaler ratio.
FSK AC Characteristic (Vdd=5V,Ta=+25°C)
CHARACTERISTIC
Min Typ Max Unit
FSK sensitivity
Low Level Sensitivity Tip & Ring @SNR 20dB
High Level Sensitivity Tip & Ring @SNR 20dB
Signal Reject
-40 -48
dBm
dBm
dBm
0
-51
FSK twist
Positive Twist (High Level)
Positive Twist (Low Level)
Negative Twist (High Level)
Negative Twist (Low Level)
+10
+10
-6
dB
dB
dB
dB
-6
CW AC Characteristic (Vdd=5V,Ta=+25°C)
CHARACTERISTIC
CW sensitivity
Min Typ Max Unit
Sensitivity @SNR 20dB
Low Tone Frequency 2130Hz
High Tone Frequency 2750Hz
CW twist
-38
±1.2
±1.2
dBm
%
%
Twist
±7
dB
DTMFr (DTMF receiver) AC Characteristic (Vdd=5V,Ta=+25°C)
CHARACTERISTIC
DTMFr
Min Typ Max Unit
Low Level Signal Sensitivity
High Level Signal Sensitivity
Low Tone Frequency
High Tone Frequency
DTMFr noise endurance
Signal to noise ratio
-36
0
±2
±2
dBm
dBm
%
%
15
dB
TONE generators for AC Characteristic (Vdd=5V,Ta=+25°C)
CHARACTERISTIC Min Typ Max Unit
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* This specification is subject to change without notice.
8/1/2004 (V3.1)
51
ELAN [ ELAN MICROELECTRONICS CORP ]
