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參數(shù)資料
| 型號： | HC55130IBZ |
| 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, PDSO28 |
| 封裝： | ROHS COMPLIANT, PLASTIC, MS-013-AE, SOIC-28 |
| 文件頁數(shù)： | 15/36頁 |
| 文件大小： | 701K |
| 代理商： | HC55130IBZ |
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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
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HC55130IBZ96 | 功能描述:電信線路管理 IC LW PWR SLIC 63DB BALANCE RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray |
| HC55130IM | 制造商:Rochester Electronics LLC 功能描述:LOW PWR SLIC,63DB BALANCE - Bulk 制造商:Harris Corporation 功能描述: |
| HC55130IMZ | 功能描述:電信線路管理 IC LW PWR SLIC 63DB BALANCE RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray |
| HC55131 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Low Power Universal SLIC Family |
| HC55131IM | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Low Power Universal SLIC Family |
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