CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTES:
1. Absolute maximum ratings are limiting values, applied individually, beyond which the serviceability of the circuit may be impaired. Functional
operability under any of these conditions is not necessarily implied.
2.
θ
JA
is measured with the component mounted on an evaluation PC board in free air.
Electrical Specifications
PARAMETER
On Hook Power Dissipation
Off Hook Power Dissipation
Off Hook I
B
+
Off Hook I
B
+x
Off Hook I
B
-
Off Hook Loop Current
Off Hook Loop Current
Off Hook Loop Current
Fault Currents
TIP to Ground
RING to Ground
TIP to RING
TIP and RING to Ground
Ring Relay Drive V
OL
Ring Relay Driver Off Leakage
Ring Trip Detection Period
Switch Hook Detection Threshold
Unless Otherwise Specified, V
B
- = -48V, V
B
+ = 12V and 5V, AG = BG = DG = 0V, Typical Parameters
T
A
= 25
o
C. Min-Max Parameters are Over Operating Temperature Range
CONDITIONS
I
LONG
= 0 (Note 4), V
B
+ = 12V
R
L
= 600Ω, I
LONG
= 0 (Note 4), V
B
+ = 12V
R
L
= 600Ω, I
LONG
= 0 (Note 4), T
A
= -40
o
C
R
L
= 600Ω, I
LONG
= 0 (Note 4), T
A
= 25
o
C
R
L
= 600Ω, I
LONG
= 0 (Note 4)
R
L
= 1200Ω, I
LONG
= 0 (Note 4)
R
L
= 1200Ω, V
B
- = -42V, I
LONG
= 0 (Note 4), T
A
=
25
o
C
R
L
= 200Ω, I
LONG
= 0 (Note 4)
MIN
-
-
-
-
-
-
17.5
25.5
TYP
135
450
-
-
-
21
-
30
MAX
235
690
6.0
5.3
39
-
-
34.5
UNITS
mW
mW
mA
mA
mA
mA
mA
mA
-
-
-
-
I
OL
= 62mA
V
RD
= 12V, RC = 1 = HIGH, T
A
= 25
o
C
R
L
= 600Ω, T
A
= 25
o
C
SHD = V
OL
SHD = V
OH
-
-
-
10
-
20
-
-
0
14
47
30
47
0.2
-
2
-
-
-
-
±2
-
-
-
-
-
0.5
100
3
-
5
-
10
-
5
mA
mA
mA
mA
V
µA
Ring Cycles
mA
mA
mA
mA
mA
ms
Ground Key Detection Threshold
GKD = V
OL
GKD = V
OH
Loop Current During Power Denial
Dial Pulse Distortion
R
L
= 200Ω
4-2
HC-5502B1
Electrical Specifications
PARAMETER
Receive Input Impedance
Transmit Output Impedance
Two Wire Return Loss
SRL LO
ERL
SRL HI
Longitudinal Balance
2-Wire Off Hook
2-Wire On Hook
4-Wire Off Hook
Low Frequency Longitudinal Balance
R.E.A. Method, (Note 3)
R
L
= 600Ω,
0
o
C
≤
T
A
≤
75
o
C
At 1kHz, 0dBm Input Level, Referenced 600Ω
200 - 3400Hz Referenced to Absolute
Loss at 1kHz and 0dBm Signal Level (Note 3)
(Note 3)
1V
RMS
200Hz - 3400Hz, (Note 3)
IEEE Method
0
o
C
≤
T
A
≤
75
o
C
53
53
50
-
-
-
-
-
-
(Note 3)
Balance Network Set Up for 600Ω
Termination at 1kHz
V
B
+ = 5V
V
B
+ = 12V
At 1kHz, (Note 3) Referenced to 0dBm Level
+3 to -40dBm
-40 to -50dBm
-50 to -55dBm
Power Supply Rejection Ratio
V
B
+ to 2-Wire
V
B
+ to Transmit
V
B
- to 2-Wire
V
B
- to Transmit
V
B
+ to 2-Wire
V
B
+ to Transmit
V
B
- to 2-Wire
V
B
- to Transmit
Logic Input Current (RS, RC, PD)
0V
≤
V
IN
≤
5V
200 - 16kHz
R
L
= 600Ω
(Note 3)
30 - 60Hz
R
L
= 600Ω
-
-
-
-
-
-
±0.05
±0.1
±0.3
dB
dB
dB
-
30
1.5
1.75
-
-
58
58
58
-
-
±0.05
±0.02
1
-89
-
40
-
-
-
23
-67
±0.2
±0.05
5
-85
2
-
dB
dB
dB
dBrnC
dBm0p
dB
dB
dBrnC
dBm0p
µs
dB
V
PEAK
V
PEAK
(Note 3)
(Note 3)
Referenced to 600Ω +2.16µF
(Note 3)
Unless Otherwise Specified, V
B
- = -48V, V
B
+ = 12V and 5V, AG = BG = DG = 0V, Typical Parameters
T
A
= 25
o
C. Min-Max Parameters are Over Operating Temperature Range
(Continued)
CONDITIONS
MIN
-
-
TYP
110
10
MAX
-
20
UNITS
kΩ
Ω
-
-
-
15.5
24
31
-
-
-
dB
dB
dB
Insertion Loss
2-Wire to 4-Wire, 4-Wire to 2-Wire
Frequency Response
Idle Channel Noise
2-Wire to 4-Wire, 4-Wire to 2-Wire
Absolute Delay
2-Wire to 4-Wire, 4-Wire to 2-Wire
Trans Hybrid Loss
Overload Level
2-Wire to 4-Wire, 4-Wire to 2-Wire
Level Linearity
2-Wire to 4-Wire, 4-Wire to 2-Wire
15
15
15
15
30
30
30
30
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
±100
dB
dB
dB
dB
dB
dB
dB
dB
µA
4-3
HC-5502B1
Electrical Specifications
PARAMETER
Logic Inputs
Logic ‘0’ V
IL
Logic ‘1’ V
IH
Logic Outputs
Logic ‘0’ V
OL
Logic ‘1’ V
OH
I
LOAD
800µA, V
B
+ = 12V, 5V
I
LOAD
80µA, V
B
+ = 12V
I
LOAD
40µA, V
B
+ = 5V
-
2.7
2.7
0.1
5.0
-
0.5
5.5
5.0
V
V
V
-
2.0
-
-
0.8
5.5
V
V
Unless Otherwise Specified, V
B
- = -48V, V
B
+ = 12V and 5V, AG = BG = DG = 0V, Typical Parameters
T
A
= 25
o
C. Min-Max Parameters are Over Operating Temperature Range
(Continued)
CONDITIONS
MIN
TYP
MAX
UNITS
Uncommitted Op Amp Specifications
PARAMETER
Input Offset Voltage
Input Offset Current
Input Bias Current
Differential Input Resistance
Output Voltage Swing
(Note 3)
R
L
= 10kΩ, V
B
+ = 12V
R
L
= 10kΩ, V
B
+ = 5V
Output Resistance
Small Signal GBW
NOTES:
3. These parameters are controlled by design or process parameters and are not directly tested. These parameters are characterized upon initial
design release, upon design changes which would affect these characteristics, and at intervals to assure product quality and specification
compliance.
4. I
LONG
= Longitudinal Current.
A
VCL
= 1 (Note 3)
(Note 3)
CONDITIONS
MIN
-
-
-
-
-
-
-
-
TYP
±5
±10
20
1
±6.2
±3
10
1
MAX
-
-
-
-
±6.6
-
-
-
UNITS
mV
nA
nA
MΩ
V
PEAK
V
PEAK
Ω
MHz
4-4
HC-5502B1
Pin Descriptions
28 PIN
PLCC
2
24 PIN
DIP/SOIC
1
SYMBOL
TIP
DESCRIPTION
An analog input connected to the TIP (more positive) side of the subscriber loop through a 150Ω feed
resistor and a ring relay contact. Functions with the Ring terminal to receive voice signals from the tele-
phone and for loop monitoring process.
An analog input connected to the RING (more negative) side of the subscriber loop through a 150Ω feed
resistor and a ring relay contact. Functions with the Tip terminal to receive voice signals from the tele-
phone and for loop monitoring purposes.
Positive Voltage Source - Most positive supply. V
B
+ is typically 12V or 5V.
Capacitor #1 - Optional Capacitor used to improve power supply rejection. This pin should be left open if un-
used.
Capacitor #3 - An external capacitor to be connected between this terminal and analog ground. Required
for proper operation of the loop current limiting function, and for filtering V
B
- supply. Typical value is 0.3µF,
30V.
Digital Ground - To be connected to zero potential and serves as a reference for all digital inputs and out-
puts on the SLIC.
Ring Synchronization Input - A TTL - Compatible Clock Input. The clock should be arranged such that a
positive transition occurs on the negative going zero crossing of the ring voltage source, ensuring that the
ring relay is activated and deactivated when the instantaneous ring voltage is near zero. If synchronization
is not required, tie to 5V.
Relay Driver - A low active open collector logic output. When enabled, the external ring relay is energized.
Tip Feed - A low impedance analog output connected to the TIP terminal through a 150Ω feed resistor.
Functions with the RF terminal to provide loop current, feed voice signals to the telephone set, and sink
longitudinal current.
Ring Feed - A low impedance analog output connected to the RING terminal through a 150Ω feed resistor.
Functions with the TF terminal to provide loop current, feed voice signal to the telephone set, and sink
longitudinal current.
Negative Voltage Source - Most negative supply. V
B
- is typically -48V with an operational range of -42V
to -58V. Frequently referred to as “battery”.
Battery Ground - To be connected to zero potential. All loop current and some quiescent current flows into
this ground terminal.
Switch Hook Detection - A Low Active LS TTL - Compatible Logic Output. This output is enabled for loop
currents exceeding 10mA and disabled for loop currents less than 5mA.
Ground Key Detection - A Low Active LS TTL - Compatible Logic Output. This output is enabled if the DC
current into the ring lead exceeds the DC current out of the tip lead by more than 20mA, and disabled if
this current difference is less than 10mA.
Power Denial - A Low Active TTL - Compatible Logic Input. When enabled the switch hook detect (SHD)
and ground key detect (GKD) are not necessarily valid, and the relay driver (RD) output is disabled.
Ring Command - A Low Active TTL - Compatible Logic Input. When enabled, the relay driver (RD) output
goes low on the next rising edge of the ring sync (RS) input, as long as the SLIC is not in the power denial
state (PD = 0) or the subscriber is not already off- hook (SHD = 0).
Capacitor #2 - An external capacitor to be connected between this terminal and digital ground. Prevents
false ground key indications from occurring during ring trip detection. Typical value is 0.15µF, 10V. This
capacitor is not used if ground key function is not required.
The analog output of the spare operational amplifier.
The inverting analog input of the spare operational amplifier.
The non-inverting analog input of the spare operational amplifier.
Receive Input, Four Wire Side - A high impedance analog input which is internally biased. Capacitive cou-
pling to this input is required. AC signals appearing at this input differentially drive the Tip feed and Ring
feed amplifiers, which in turn drive tip and ring through 300Ω of feed resistance on each side of the line.
中风发生时，一切都是以秒来计算的。延误治疗可能导致大脑重大损伤。伦敦大学医学院的一位博士Alistair McEwan已经获得行为医学研究所(Action Medical Research)的同意，为急救人员开发一种无线诊断系统来减少时间延误。感谢抗血栓药物，一些病人在病情发作的三个小时之内可以完全恢复。但出血也会导致中风。医生在治疗之前需要确定发病原因，因为不适当的服用抗血栓药物会加重损害。...[详细]
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