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.
θ
JA
is measured with the component mounted on an evaluation board PC board in free air.
2. All grounds (AGND, BGND) must be applied before V
CC
or V
BAT
. Failure to do so may result in premature failure of the part. If a user
wishes to run separate grounds off a line card, the AGND must be applied first.
Electrical Specifications
Unless Otherwise Specified, Typical Parameters are at T
A
= 25
o
C, Min-Max Parameters are over
Operating Temperature Range, V
BAT
= -24V, V
CC
= +5V, AGND = BGND = 0V. All AC Parameters are specified
at 600Ω 2-Wire terminating impedance.
TEST CONDITIONS
MIN
TYP
MAX
UNITS
PARAMETER
RINGING TRANSMISSION PARAMETERS
V
RING
Input Impedance
4-Wire to 2-Wire Gain
AC TRANSMISSION PARAMETERS
RX Input Impedance
OUT1 Positive Output Voltage Swing
OUT1 Negative Output Voltage Swing
4-Wire Input Overload Level
(Note 3)
-
-
5.4
40
-
-
kΩ
V/V
V
RING
to V
T-R
(Note 3)
300Hz to 3.4kHz (Note 3)
R
L
= 10kΩ (Note 3)
R
L
= 10kΩ (Note 3)
300Hz to 3.4kHz R
L
= 1200Ω, 600Ω Reference
(Note 3)
Matched for 600Ω, f = 300Hz (Note 3)
Matched for 600Ω, f = 1000Hz (Note 3)
Matched for 600Ω, f = 3400Hz (Note 3)
-
+2.5
-4.5
-
108
-
-
+3.1
-
-
-
-
kΩ
V
V
V
PEAK
dB
dB
dB
dB
2-Wire Return Loss
37
40
30
40
-
-
-
-
-
-
-
-
2-Wire Longitudinal to Metallic Balance
Off Hook
4-Wire Longitudinal Balance Off Hook
Longitudinal Current Capability
Insertion Loss, 2-Wire to 4-Wire
Insertion Loss, 4-Wire to 2-Wire
Insertion Loss, 4-Wire to 4-Wire
Frequency Response
Per ANSI/IEEE STD 455-1976 300Hz to 3400Hz
(Note 3)
300Hz to 3400Hz (Note 3)
I
LINE
= 40mA, T
A
= 25
o
C (Note 3)
0dBmO, 1kHz, Includes Transhybrid Amp Gain = 3
0dBmO,1kHz
0dBmO, 1kHz, Includes Transhybrid Amp Gain = 3
300Hz to 3400Hz Referenced to Absolute Level
at 1kHz, 0dBm Referenced 600Ω
40
-
-
-
-
-
-
40
±0.05
±0.05
-
±0.02
-
-
±0.2
±0.2
±0.35
±0.06
dB
mA
RMS
dB
dB
dB
dB
64
HC55171B
Electrical Specifications
Unless Otherwise Specified, Typical Parameters are at T
A
= 25
o
C, Min-Max Parameters are over
Operating Temperature Range, V
BAT
= -24V, V
CC
= +5V, AGND = BGND = 0V. All AC Parameters are specified
at 600Ω 2-Wire terminating impedance.
(Continued)
TEST CONDITIONS
+3 to 0dBm, Referenced to -10dBm (Note 3)
0 to -40dBm, Referenced to -10dBm (Note 3)
-40 to -55dBm, Referenced to -10dBm (Note 3)
Absolute Delay, 2-Wire to 4-Wire
Absolute Delay, 4-Wire to 2-Wire
Absolute Delay, 4-Wire to 4-Wire
Transhybrid Loss
Total Harmonic Distortion
2-Wire/4-Wire, 4-Wire/2-Wire, 4-Wire/4-Wire
Idle Channel Noise
2-Wire and 4-Wire
PSRR, V
CC
to 2-Wire
PSRR, V
CC
to 4-Wire
PSRR, VBAT to 2-Wire
PSRR, VBAT to 4-Wire
PSRR, V
CC
to 2-Wire
PSRR, V
CC
to 4-Wire
PSRR, VBAT to 2-Wire
PSRR, VBAT to 4-Wire
PSRR, V
CC
to 2-Wire
PSRR, V
CC
to 4-Wire
PSRR, VBAT to 2-Wire
PSRR, VBAT to 4-Wire
DC PARAMETERS
Loop Current Programming Range
Loop Current Programming Accuracy
Loop Current During Power Denial
Fault Current, Tip to Ground
Fault Current, Ring to Ground
Fault Current, Tip and Ring to Ground
Switch Hook Detection Threshold
Ring Trip Comparator Voltage Threshold
Thermal ALARM Output
Safe Operating Die Temperature Exceeded
(Note 3)
(Note 3)
(Note 3)
R
L
= 200Ω, V
BAT
= -48V
(Note 3)
(Note 4)
20
-15
-
-
-
-
9
-0.28
140
-
-
±4
90
100
130
12
-0.24
-
60
+15
-
-
-
-
15
-0.22
160
mA
%
mA
mA
mA
mA
mA
V
o
C
PARAMETER
Level Linearity
MIN
-
-
-
-
-
-
36
-
TYP
-
-
-
-
-
0.95
40
-
MAX
±0.10
±0.12
±0.30
1.0
1.0
-
-
-50
UNITS
dB
dB
dB
µs
µs
µs
dB
dB
300Hz to 3400Hz (Note 3)
300Hz to 3400Hz (Note 3)
300Hz to 3400Hz (Note 3)
V
IN
= 1V
P-P
at 1kH (Note 3)
Reference Level 0dBm at 600Ω
300Hz to 3400Hz (Note 3)
C-Message (Note 3)
Psophometric (Note 3)
30Hz to 200Hz, R
L
= 600Ω (Note 3)
-
-
30
45
23
33
3
-87
35
47
28
38
35
46
50
60
34
40
40
50
-
-
-
-
-
-
-
-
-
-
-
-
-
-
dBrnC
dBmp
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
200Hz to 3.4kHz, R
L
= 600Ω (Note 3)
33
44
40
50
3.4kHz to 16kHz, R
L
= 600Ω (Note 3)
30
35
30
40
Dial Pulse Distortion
-
0.1
0.5
ms
65
HC55171B
Electrical Specifications
Unless Otherwise Specified, Typical Parameters are at T
A
= 25
o
C, Min-Max Parameters are over
Operating Temperature Range, V
BAT
= -24V, V
CC
= +5V, AGND = BGND = 0V. All AC Parameters are specified
at 600Ω 2-Wire terminating impedance.
(Continued)
TEST CONDITIONS
MIN
TYP
MAX
UNITS
PARAMETER
UNCOMMITTED RELAY DRIVER
On Voltage, V
OL
Off Leakage Current
TTL/CMOS LOGIC INPUTS (F0, F1, RS, TST, RDI)
Logic Low Input Voltage
Logic High Input Voltage
Input Current
Input Current
LOGIC OUTPUTS (SHD, RTD, ALM)
Logic Low Output Voltage
Logic High Output Voltage
POWER DISSIPATION
Power Dissipation On Hook
I
OL
(RDO) = 30mA
-
-
0.2
±10
0.5
±100
V
µA
0
2.0
I
IH
, 0V
≤
V
IN
≤
5V
I
IL
, 0V
≤
V
IN
≤
5V
-
-
-
-
-
-
0.8
5.5
-1
-100
V
V
µA
µA
I
LOAD
= 800µA
I
LOAD
= 40µA
-
2.7
-
0.3
-
-
300
150
280
0.6
5.5
-
-
-
-
V
V
V
CC
= +5V, V
BAT
= -80V, R
LOOP
=
V
CC
= +5V, V
BAT
= -48V, R
LOOP
=
∞
∞
-
-
-
mW
mW
mW
Power Dissipation Off Hook
V
CC
= +5V, V
BAT
= -24V, R
LOOP
= 600Ω,
I
L
= 25mA
V
CC
= +5V, V
BAT
= -80V, R
LOOP
=
V
CC
= +5V, V
BAT
= -48V, R
LOOP
=
V
CC
= +5V, V
BAT
= -24V, R
LOOP
=
I
CC
∞
∞
∞
-
-
-
-
-
-
3
2
1.9
3.6
2.6
2.3
6
5
5
7
6
4.5
mA
mA
mA
mA
mA
mA
I
BAT
V
CC
= +5V, V
B
- = -80V, R
LOOP
=
V
CC
= +5V, V
B
- = -48V, R
LOOP
=
V
CC
= +5V, V
B
- = -24V, R
LOOP
=
∞
∞
∞
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. This parameter directly affects device junction temperature. Refer to Power Dissipation discussion of data sheet for design information.
66
HC55171B
R
TF
R
V
RX
17
OUT 1
12
-IN 1
13
V
RING
24
V
TX
19
V
CC
2
AGND
1
BIAS
NETWORK
22
TF
25
-
+
R
R/2
+2V
R/20
R
R
2R
BGND
-
+
OP AMP
27
4
5
V
BAT
F1
F0
RS
TST
TIP
SENSE
14
R
R
4.5K
100K
+
2R
-
TA
SHD
THERM
LTD
SH
IIL LOGIC INTERFACE
6
9
TSD
25K
RA
RTD
GK
RING
SENSE 1
RING
SENSE 2
15
100K
100K
+
-
16
100K
4.5K
90K
25K
FAULT
DET
RFC
7
8
10
SHD
RTD
ALM
RDO
90K
26
RF
RF
+
-
90K
GM
VB/2
REF
18
NU
28
RTI
-
+
RF2
21
R = 108kΩ
3
V
REF
11
I
LIMIT
20
RDI
HC55171B DEVICE TRUTH TABLE
F1
0
0
1
1
F0
0
1
0
1
STATE
Loop power Denial Active
Power Down Latch RESET, Power on
RESET
RD Active (unbalanced ringing)
Normal Loop feed
Power Dissipation
Careful thermal design is required to guarantee that the
maximum junction temperature of 150
o
C of the device is not
exceeded. The junction temperature of the SLIC can be
calculated using:
T
J
=
T
A
+
θ
JA
(
I
CC
V
CC
+
I
BAT
V
BAT
–
( (
I
LOOP
) •
R
LOOP
) )
(EQ. 1)
2
The truth table for the internal logic of the HC55171B is
provided in the above table. This family of ringing SLICs can be
configured to support traditional unbalanced ringing and
through SLIC balanced ringing. The device operating states
used by through SLIC ringing applications are loop power
denial and normal feed. During loop power denial, the tip and
ring amplifiers are disabled (high impedance) and the DC volt-
age of each amplifier approaches ground. The SLIC will not
provide current to the subscriber loop during this mode and will
not detect loop closure. Voice transmission occurs during the
normal loop feed mode. During normal loop feed the SLIC is
completely operational and performs all transmission and
supervisory functions.
Where T
A
is maximum ambient temperature and
θ
JA
is
junction to air thermal resistance (and is package
dependent). The entire term in parentheses yields the SLIC
power dissipation. The power dissipation of the subscriber
loop does not contribute to device junction temperature and
is subtracted from the power dissipation term. Operating at
85
o
C, the maximum PLCC SLIC power dissipation is 1.18W.
Likewise, the maximum SOIC SLIC power dissipation is
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