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參數(shù)資料
型號(hào)： AS2536-T
廠商： ams
文件頁(yè)數(shù)： 23/26頁(yè)
文件大小： 0K
描述： IC TELEPHONE CMOS MULTIFU 28SOIC
標(biāo)準(zhǔn)包裝： 1,500
系列： *
Data She et AS25 33-36
austriamicrosystems
Revision 8.10
Page 5 of 25
Keyboard Connections continued
(either VOL or +/– keys)
Figure 4 Keyboard Connection AS2535
Power On Reset
The on chip power on reset circuit monitors the supply
voltage (VDD ) during off-hook. When VDD rises above
approx. 1.2V, a power on reset occurs which clears the
RAM.
DC Conditions
The normal operating range is from 13 mA to 100 mA.
Operating range with reduced performance is from 5 mA to
13 mA (parallel operation). In the operating range all
functions are operational.
At line currents below 13 mA the AS253x provides an
additional slope below 4.5V in order to allow parallel
operation (see Figure 12).
The dc characteristic (excluding diode bridge) is
determined by the voltage at LI and the resistor R1 at line
currents above 13 mA as follows:
VLS = VLI + ILINE × R1
The voltage at LI is 4.5V in the normal operating range.
During pulse dialing the speech circuit and other part of
the device not operating is in a power down mode to save
current. The CS pin is pulled to VSS in order to turn the
external shunt transistor on to keep a low voltage drop at
the LS pin during make periods.
AC Impedance
The ac impedance of the circuit is set by external
components. The impedance can be real or complex.
The ac impedance is determined as follows:
ZAC = 33 Z1
The dc value of Z1 should be 30
to maintain correct dc
performance.
Return loss and side tone cancellation can be determined
independent of each other.
Speech Circuit
The speech circuit consists of a transmit and a receive
path with dual soft clipping, mute, line loss compensation
and sidetone cancellation.
P
P /// M
M
1
11
2
22
3
33
4
44
5
55
6
66
7
77
M
M 9
99
M
M 1
11 0
00
M
M 1
11 1
11
M
M 1
11 2
22
M
M 5
55
M
M 6
66
M
M 7
77
M
M 8
88
M
M 1
11
M
M 2
22
M
M 3
33
M
M 4
44
8
88
9
99
0
00
***
#
##
R
R 1
11
R
R 2
22
R
R 3
33
L
LL N
N
N R
R
V
V O
O
O L
LL
+
++
R1
R2
R3
R4
C1
C2
C3
C4
ams
AG
Technical
content
still
valid
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AS2535-T IC TELEPHONE CMOS MULTIFU 28SOIC
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AS2534U-T IC TELEPHONE CMOS MULTIFU 28SOIC
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AS2536UT 制造商:ams 功能描述:SOIC 28
AS2536UTT 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
AS2536UT-Z 功能描述:IC TELEPHONE CMOS MULTIFU 28SOIC 制造商:ams 系列:- 包裝:帶卷（TR） 零件狀態(tài):在售 功能:電信電路 接口:- 電路數(shù):1 電壓 - 電源:3.8 V ~ 5 V 電流 - 電源:4mA 工作溫度:-25°C ~ 70°C 安裝類(lèi)型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商器件封裝:28-SOIC 包括:- 標(biāo)準(zhǔn)包裝:1,500
AS2536W 制造商:AMSCO 制造商全稱(chēng):austriamicrosystems AG 功能描述:Multi-Standard CMOS Telephone IC for Basic Telephones
AS253R6FLF 制造商:TT Electronics / IRC 功能描述:AS253R6FLF
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