73K224L
V.22bis, V.22, V.21, Bell 212A, 103
Single-Chip Modem
DATA SHEET
DYNAMIC CHARACTERISTICS AND TIMING (continued)
PARAMETER
Carrier Detect
Threshold
CONDITION
MIN
NOM
MAX
UNIT
Receive Gain = On for lower input level measurements
All Modes
-48
-43
dBm0
Hysteresis
All Modes
2
Delay Time
FSK
70 dBm0 to -6 dBm0
70 dBm0 to -40 dBm0
25
25
7
37
37
17
17
37
37
37
30
29
21
32
28
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
DPSK -70 dBm0 to -6 dBm0
-70 dBm0 to -40 dBm0
7
QAM
-70 dBm0 to -6 dBm0
-70 dBm0 to -40 dBm0
-6 dBm0 to -70 dBm0
-40 dBm0 to -70 dBm0
25
25
25
15
20
14
25
18
Hold Time
FSK
DPSK -6 dBm0 to -70 dBm0
-40 dBm0 to -70 dBm0
QAM
-6 dBm0 to -70 dBm0
-40 dBm0 to -70 dBm0
DPSK Mode
Answer Tone Detectors
Detect Level
-48
6
-43
50
50
dBm0
ms
Detect Time
Call Init Mode, 2100 or 2225 Hz
Hold Time
6
ms
Pattern Detectors
S1 Pattern
DPSK Mode
Delay Time
10
10
55
45
ms
ms
For signals from -6 to -40 dBm0,
-6 to -40 dBm0, Demod Mode
Hold Time
Unscrambled Mark
Delay Time
10
10
45
45
ms
ms
For signals from -6 to –40
call Init Mode
Hold Time
Receive Level Indicator
Detect On
-22
1
-28
7
dBm0
ms
Valid after Carrier Detect
Output Smoothing Filter
Output Impedance
Output load
DPSK Mode
4
TXA pin
200
300
50
Ω
TXA pin; FSK Single
10
KΩ
pF
Tone out for THD = -50 dB
in 0.3 to 3.4 kHz range
Maximum Transmitted
Energy
4 kHz, Guard Tones off
10 kHz, Guard Tones off
12 kHz, Guard Tones off
-35
-55
-65
dBm0
dBm0
dBm0
Page: 21 of 31
© 2005, 2008 TERIDIAN Semiconductor Corporation
Rev 7.1
TERIDIAN [ TERIDIAN SEMICONDUCTOR CORPORATION ]
