参数资料
| 型号： | AS2540-T |
| 厂商： | ams |
| 文件页数： | 2/19页 |
| 文件大小： | 0K |
| 描述： | IC TELEPHONE CMOS MULTIFU 28SOIC |
| 标准包装： | 1,500 |
| 系列： | * |
Data Sheet AS2540
austriamicrosystems
Revision 3.1
Page 9 of 18
The MF output levels are set to -4/-6dB which should allow
efficient backup dialling under all line conditions. The
TONE/PAUSE ratio is 90ms/90ms. The preemphasis
between low group and high group frequencies is t.m.
2.6dB.
FLASH timing
CPU can control the DPn pin and the MASK-mode of
AS2540 via serial interface.
Tone Ringer
Ring frequency discrimination
The ring frequency discrimination assures that only signals
with a frequency between 13Hz and 70Hz are regarded as
valid ring signals.
When a valid ring signal is present for 102ms continuously,
the ring melody generator is activated and remains active
as long as a valid ring signal is present.
Once the ring melody generator has started, the ring signal
is continuously monitored and the ring melody generator is
instantly turned off according to the momentary presence
of a valid or invalid ring signal until next off-hook.
Toner ringer melody
The 3 basic melody frequencies are:
-
F1=880Hz
-
F2=1067Hz
-
F3=1333Hz
The repetition rate is set to 4 which means that the
sequence of F1, F2, F3, F1, F2, F3 is repeated 4 times
within a second.
Keyboard connections
R1
1
PIN
C1
2
3
R2
4
5
6
7
8
9
*
0
#
PIN
C2
PIN
C3
PIN
R1
PIN
R2
PIN
MODE
c1
C2
C3
Double contacts under keys 0-9*#: One contact is
connected to AS2540, the other one to CPU.
ams
AG
Technical
content
still
valid
相关PDF资料 |
PDF描述 |
|---|---|
| AS8002-AQFP | IC CURRENT MEASURE SOLAR 16VQFN |
| AS8501-ASOT | IC CURRENT MEASURE SOLAR 16-SOIC |
| AS8510-ASST | IC BATTERY MANAGEMENT 20-SSOP |
| AS8530-ASOT-002-500 | IC TXRX LIN COMPANION 8-SOIC |
| AS8530A-ASOT-500 | IC SYSTEM BASIS CHIP 8-SOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AS2540TR | 制造商:ams 功能描述:IC TELEPHONE CMOS MULTIFU 28SOIC 制造商:ams 功能描述:T&R / SOIC 28 |
| AS25490FLF | 制造商:TT Electronics / IRC 功能描述:AS25490FLF |
| AS25490HLF | 制造商:TT Electronics / IRC 功能描述:AS25490HLF |
| AS25490JLF | 制造商:TT Electronics / IRC 功能描述:AS25490JLF |
| AS25491FLF | 制造商:TT Electronics / IRC 功能描述:AS25491FLF |
发布紧急采购，3分钟左右您将得到回复。