w925e625 ETC-unknow, w925e625 Datasheet - Page 73

• Manufacturer Part Number: w925e625
• Description: 8-bit Cid Microcontroller
• Manufacturer: ETC-unknow

Notes:
1. signal consists of all DTMF tones.
2. Tone duration is 40Ms at least, tone pause duration is 40Ms at least.
3. Referenced to the lowest level frequency component in DTMF signal.
4. Referenced to the minimum valid accept level.
“
testing.
‡
INPUT SENSITIVITY PER TONE
Positive and negative twist accept
Frequency Deviation accept
Frequency Deviation reject
3
Noise Tolerance
Dial tone Tolerance
DTMF present detect time
DTMF absent detect time
DTMF Detected Duration
DTMF Signal Ignore Time
DTMF Pause Accept Time
” Typical figure are at V
rd
Tone Tolerance
PARAMETER
PARAMETER
DD
= 5V and temperature = 25 ℃ are design aids only, not guaranteed and not subject to production
CONDITION
DTMFD = 1
DTMFD = 0
DTMFD = 1
DTMF Detection Interface
Est
SYM.
DTMF Decoder
SYM.
t
- 73 -
t
t
t
DPA
t
DD
FP
FA
DI
MIN.
-29
1.5
3.5
7
MIN.
0.5
0.1
40
20
TYP
22
Publication Release Date: July 4, 2005
TYP
MAX.
-16
-12
‡
1
MAX.
20
UNITS
W925E/C625
8
8
dBm
Db
Db
Db
Db
%
%
UNITS NOTES
MS
MS
MS
MS
MS
1,2
1,2
1,2
1,2
1,2,3
1,2,3
1,2,4
Revision A10
NOTES