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參數(shù)資料
| 型號： | HC55142IMZ96 |
| 廠商： | INTERSIL CORP |
| 元件分類： | 模擬傳輸電路 |
| 英文描述： | Low Power Universal SLIC Family |
| 中文描述： | TELECOM-SLIC, PQCC28 |
| 封裝： | ROHS COMPLIANT, PLASTIC, LCC-28 |
| 文件頁數(shù)： | 15/36頁 |
| 文件大?。?/td> | 701K |
| 代理商： | HC55142IMZ96 |
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15
FN4659.13
June 1, 2006
On Hook Overhead Voltage
The on hook overhead
voltage at the load (V
OH
(on)
at Load) is independent of the
V
BH
battery voltage. Once
set, the on hook voltage
remains constant as the V
BH
battery voltage changes. The
on hook voltage also remains
constant over temperature
and line leakages up to 0.6
times the Switch Hook Detect threshold (I
SHD
). The
maximum loop current for a constant on hook overhead
voltage is defined as ISH-.
The on hook overhead voltage, required for a given signal
level at the load, must take into account the AC voltage drop
across the 2 external protection resistors (R
P
) and the 2
internal sense resistors (R
S
) as shown in Figure 16. The AC
on hook overload voltage is calculated using Equation 1.
where
V
OH(on) at Load
= On hook overhead voltage at load
V
sp(on)
= Required on hook transmission for speech
R
P
= Protection Resistors (Typically 30
)
R
S
= Internal Sense Resistors (40
)
Z
L
= AC load impedance for (600
)
1.5V = Additional on hook overhead voltage requirement
To account for any process and temperature variations in the
performance of the SLIC, 1.5V is added to the overhead
voltage requirement for the on hook case in Equation 1 and
2.0V for the off hook case in Equation 3. Note the 2.5V
overhead is automatically generated in the SLIC and is not
part of the external overhead programming.
Internal overhead voltage automatically generated by the SLIC.
FIGURE 15. UniSLIC14 DC FEED CURVE
VBH
2.5V
VOH(off) AT LOAD
ISH-
ILOOP(min)
ILOOP(max)
60k
SLOPE
RLOOP(max)
SLIC SELF PROGRAMMING
T
LOOP CURRENT (mA)
IOH
CONSTANT
CURRENT
REGION
R
SAT
VOH(on) AT LOAD
I
SHD
V
BH
V
OH(on)
2.5V
ON HOOK
OVERHEAD
ISH-
LOOP CURRENT
T
DC FEED CURVE
ISH- = I
SHD
(0.6)
I
SHD
(EQ. 1
V
OH on
)
at Load
V
sp on
)
1
2R
-----------------------------
2R
S
+
L
+
×
1.5V
+
=
FIGURE 16. OVERHEAD VOLTAGE OF THE TIP AND RING
AMPLIFIERS
TIP AND RING
AMPLIFIERS
INTERNAL SENSE
RESISTORS
EXTERNAL PROTECTION
RESISTOR
2R
P
2R
S
OVERHEAD VOLTAGE
V
OH
(ON, OFF)
Where:
V
ZL
is the required on hook or offhook
transmission delivered to the load.
Z
L
REQUIRED
(LOAD)
UniSLIC14
V
ZL
V
OH ON OFF
)
2R
-----------------------------
2R
S
+
L
V
ZL
=
HC55120, HC55121, HC55130, HC55140, HC55142, HC55143, HC55150
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HC55121 | Ultra Low Power SLICs.(超低功耗用戶線路接口電路) |
| HC55130 | Ultra Low Power SLICs.(超低功耗用戶線路接口電路) |
| HC5515CMZ | ITU CO/PABX SLIC with Low Power Standby |
| HC5515 | ITU CO/PABX SLIC with Low Power Standby |
| HC5515CM | ITU CO/PABX SLIC with Low Power Standby |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HC55143 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Low Power Universal SLIC Family |
| HC55143IM | 功能描述:IC SLIC UNIVERSAL LP 32-PLCC RoHS:否 類別:集成電路 (IC) >> 接口 - 電信 系列:UniSLIC14 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS 產(chǎn)品變化通告:Product Discontinuation 06/Feb/2012 標(biāo)準(zhǔn)包裝:750 系列:* |
| HC5514X | 制造商:Harris Corporation 功能描述: |
| HC5514XB | 制造商:Harris Corporation 功能描述: |
| HC5514XEVAL1 | 功能描述:界面開發(fā)工具 UNISLIC14 FAMILY EVALUATION BRD RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類型:RS-485 工具用于評估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V |
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