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Электронный компонент: LH1465AB

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Advisory
July 1998
LH1465AB/AAE ISDN dc Termination IC
Data Sheet Advisory
Application Circuit
Replace Figure 11 on page 10 of the LH1465AB/AAE data sheet with the figure shown below.
5-7034(C)
Figure 1. MLT Circuit Showing New Placement of Zener Diode (Z
D
) and Capacitor (C
A
)
In the ILOSS mode (refer to ANSI T1.601 1992, Section 6.5.2), the NT generates a scrambled, framed, 2B1Q
signal such as SN1 and SN2. When the ILOSS mode is applied to circuits with the LH1465, it was observed
that for some short loop lengths, the NT, once in the ILOSS mode, would not respond to further maintenance
pulses until the ILOSS timer expired. It was discovered that there is some portion of the transmitted 2B1Q sig-
nal from the NT that passes through the LH1465 to the optoisolator. This causes the optoisolator to report
incorrect dial pulses at its output, and thus prevent the NT from properly exiting the ILOSS mode.
To correct this situation, the dropout voltage (voltage at the Tip/Ring needed to turn on the optoisolator) of the
optoisolator driver on the LH1465 is raised using the 3.6 V zener diode Z
D
(for example,
Motorola*
MMSZ4685T1). Capacitor C
A
is a 1.0 F
10% tantalum chip capacitor, with a voltage rating of at least 16 V.
C
A
is added to provide a level of filtering for the transition points (turn-on or turn-off) of the optoisolator input
voltage, which increases the robustness of the circuit.
*
Motorola
is a registered trademark of Motorola Inc.
R14
1.1 k
2 W
PR+
T
R
PR
U3
LH1465AB
1
2
3
4
TC
RS
PD
COM
8
7
6
5
R12
137
C15
1.0 F
R10
10 k
R8
17.8 k
+5 V
R9
2.2 M
5
6
8
2
3
U2
HCPL-0701
7
C
A
1.0 F
MLT CIRCUIT
FOR NORTH AMERICAN
APPLICATIONS ONLY
R15
1.1 k
2 W
R11
137
(PLACE THIS CAPACITOR AS
CLOSE AS POSSIBLE TO THE LH1465)
Z
D
RING
TIP
SCNT1
OPTOIN
PIN
Lucent Technologies Inc. reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use or application. No
rights under any patent accompany the sale of any such product(s) or information.
Copyright 1998 Lucent Technologies Inc.
All Rights Reserved
Printed in U.S.A.
July 1998
AY98-028ISDN (Replaces AY98-013ISDN)
(Must accompany DS97-414ISDN)
For additional information, contact your Microelectronics Group Account Manager or the following:
INTERNET:
http://www.lucent.com/micro
E-MAIL:
docmaster@micro.lucent.com
N. AMERICA:
Microelectronics Group, Lucent Technologies Inc., 555 Union Boulevard, Room 30L-15P-BA, Allentown, PA 18103
1-800-372-2447, FAX 610-712-4106 (In CANADA: 1-800-553-2448, FAX 610-712-4106)
ASIA PACIFIC: Microelectronics Group, Lucent Technologies Singapore Pte. Ltd., 77 Science Park Drive, #03-18 Cintech III, Singapore 118256
Tel. (65) 778 8833, FAX (65) 777 7495
CHINA:
Microelectronics Group, Lucent Technologies (China) Co., Ltd., A-F2, 23/F, Zao Fong Universe Building, 1800 Zhong Shan Xi Road,
Shanghai 200233 P. R. China Tel. (86) 21 6440 0468, ext. 316, FAX (86) 21 6440 0652
JAPAN:
Microelectronics Group, Lucent Technologies Japan Ltd., 7-18, Higashi-Gotanda 2-chome, Shinagawa-ku, Tokyo 141, Japan
Tel. (81) 3 5421 1600, FAX (81) 3 5421 1700
EUROPE:
Data Requests: MICROELECTRONICS GROUP DATALINE: Tel. (44) 1189 324 299, FAX (44) 1189 328 148
Technical Inquiries: GERMANY: (49) 89 95086 0 (Munich), UNITED KINGDOM: (44) 1344 865 900 (Bracknell),
FRANCE: (33) 1 48 83 68 00 (Paris), SWEDEN: (46) 8 600 7070 (Stockholm), FINLAND: (358) 9 4354 2800 (Helsinki),
ITALY: (39) 2 6601 1800 (Milan), SPAIN: (34) 1 807 1441 (Madrid)
Data Sheet
February 1998
LH1465AB/AAE ISDN dc Termination IC
Features
s
ANSI U-DSL compatible
s
High linearity
s
MLT compatible
s
SARTS compatible
s
Portable test set compatible
Description
The LH1465 ISDN dc Termination IC is used on U-
interface digital subscriber lines (U-DSL) and pro-
vides a polarity insensitive dc termination for the
loop-sealing current and a recognizable signature for
mechanized loop testing (MLT) systems. The LH1465
passes dc signaling information to the NT1 circuitry
through a 6N139 optoisolator (or equivalent). The
LH1465 IC consists of two functional blocks. The first
provides the electronic inductor and silicon-controlled
rectifier portion of the termination, while the second
drives the LED of the 6N139 optoisolator. Inquire
about the availability of tape-and-reel packaging for
the 16-pin SOG (LH1465AAE).
Device Code
Package Type
LH1465AB
8-Pin, Plastic DIP
LH1465AAE
16-Pin, Plastic SOG
12-1947(F)
Figure 1. Functional Diagram/8-Pin DIP
1
2
3
4
5
6
7
8
PD1
6N139
8
1
F
15 V, 10%
7
4
2.2 k
4 W, 5%
68
1/4 W, 1%
5
1
6
3
2
POLARITY
GUARD
OPTOISOLATOR
DRIVER
ELECTRONIC INDUCTOR,
BREAKOVER, AND
LATCH CIRCUITS
CURRENT LIMIT AND EXCESS
POWER PROTECTION
2
2
Lucent Technologies Inc.
Data Sheet
February 1998
LH1465AB/AAE ISDN dc Termination IC
Functional Description
The LH1465 plays a dual role in the ISDN NT1: first, as
an electronic inductor for a dc termination with high ac
impedance; and second, as part of the dc signaling
system for line testing capability. The LH1465 meets or
exceeds all specifications for the ISDN NT1 dc termina-
tion as described by ANSI Standard T1.601-1991.
Use of the LH1465 requires only a few discrete compo-
nents. See Figure 11 for a typical NT1 application. The
LH1465 is current limited, but is not an overvoltage
surge protector. A crowbar-type surge protector limiting
the line voltage to less than 250 V is recommended to
protect the LH1465. The surge protector must with-
stand the requirements in Tables 4 and 5. One such
protector is the
Teccor
* Inc., P2000AA61
SIDACTOR
*.
The LH1465 has a polarity guard so that the device
gives the same characteristics whether the NT1 TIP or
RING terminal is connected to the battery voltage. TIP
and RING are connected directly to the LH1465AB
terminals 2 and 3 and to the LH1465AAE terminals 4
and 5.
The dc T to R I-V characteristics of the LH1465 are
shown in Figures 2 and 3. As battery voltage is applied
to the loop, the LH1465 conducts current only when the
voltage across the LH1465 exceeds about 35 V. With
35 V or more applied to the LH1465A, the device con-
ducts about 150
A of current for about 20 ms and then
turns on and goes into the ON state. The LH1465 will
remain in the ON state for as long as the loop current
exceeds 0.5 mA.
The LH1465 has a turn-on and turn-off timing circuit
that ensures that the LH1465 will: a) not turn on if a
voltage above 43.5 V is applied for less than 3 ms; and
b) not turn off if the loop current is interrupted for less
than 3 ms.
Current for the LED of the optocoupler flows when the
current in the LH1465 is greater than 1 mA. However,
the LH1465 is guaranteed to turn on if a voltage above
43.5 V is applied for more than 50 ms, and turn off if
1 mA loop current is interrupted for more than 100 ms.
See Figures 6, 7, and 8 of this document or Table F1 in
Appendix F of ANSI Standard T1.601-1991.
Current for the LED is interrupted when loop current is
interrupted. The current in the ON state is determined
by the battery voltage and loop resistance. Should the
loop resistance be negligible and/or applied voltage
excessively large, the LH1465 will limit the loop current
to less than 60 mA. While in current limit, the LH1465
shunts the 2.2 k
, 4 W power resistor R2 across itself
to protect against excessive thermal heating.
In the event that fault voltages exceeding 100 V are
impressed upon TIP and RING, the LH1465 will shut
off and go into a standby mode where very little current
flows. When the fault voltage is removed, the LH1465
goes back into its normal ON-state operation.
Pin Descriptions
DIP SOG
Symbol
Name/Function
1
1
PR+
Protection resistor positive
side
2
4
T
Tip side of the loop
3
5
R
Ring side of the loop
4
8
PR
Protection resistor negative
side
5
9
COM
Common
6
12
PD
Photodiode (LED input
current)
7
13
RS
Current-limit resistor
8
16
TC
Timing capacitor
2, 3
NC
No connection
6, 7
NC
No connection
10, 11
NC
No connection
14, 15
NC
No connection
*
Teccor
is a trademark and
SIDACTOR
is a registered trademark of Teccor, Inc.
Lucent Technologies Inc.
3
Data Sheet
February 1998
LH1465AB/AAE ISDN dc Termination IC
Absolute Maximum Ratings
At 25
C
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are abso-
lute stress ratings only. Functional operation of the device is not implied at these or any other conditions in excess
of those indicated in the operations sections of the data sheet. Exposure to absolute maximum ratings for extended
periods can adversely affect device reliability.
* If the SOG package is used, it is recommended to place a drop of RTV (room temperature vulcanizing) compound on the tip and ring pins
(pins 3 and 4). This will guard against the possibility of arcing between the pins (which are 0.030 in. apart) under worst-case dust and oil
board buildup conditions.
Electrical Characteristics
T
A
= 25
C
Minimum and maximum values are testing requirements. Typical values are characteristics of the device and are
the result of engineering evaluations. Typical values are for information purposes only and are not part of the test-
ing requirements.
Table 1. dc Specifications, Normal Operation
(See Figures 2 and 3.)
Table 2. ac Specifications, Normal Operation
Parameter
Symbol
Min
Typ
Max
Unit
Ambient Operating Temperature
T
A
40
--
85
C
Storage Temperature
T
stg
40
--
125
C
Power Dissipation
P
D
--
--
1
W
Pin Soldering Temperature (t = 15 s)
--
--
--
300
C
Maximum Voltage (T/R, R/T)*
--
--
--
300
Vdc
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit
Activate/Nonactivate Voltage
V
AN
--
30.0
37.0
39.0
V
Breakover Current
I
BO
--
--
0.5
1.0
mA
dc Voltage Drop Active State
V
ON
1 mA
I
SL
20 mA
--
13.75
15
V
dc Leakage Current
I
LKG
V
OFF
= 20 V
--
0.001
5
A
Hold/Release Current Active
State
I
H/R
--
0.1
0.5
1.0
mA
Minimum ON Current
I
MIN1
V
ON
< 54 V
20
35
--
mA
Minimum ON Current
I
MIN2
54 V
V
ON
100 V for 2 s Source
Resistance: 200
to 4 k
9.0
45
--
mA
Minimum ON Current
I
MIN3
V
ON
> 100 V
0
0.2
--
mA
Maximum ON Current
I
MAX1
V
ON
70 V
--
--
70
mA
Maximum ON Current
I
MAX2
V
ON
> 70 V
--
--
mA
Optocoupler LED Current
Active State (6N139)
I
LED
--
0.2
0.3
10
mA
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit
ac Impedance
Z
MT
200 Hz to 50 kHz (See Figure 4.)
10
50
--
k
Linearity Distortion
D
1
f = 200 Hz to 40 kHz, I
SL
= 1 mA to 20 mA
V
APP
10.5 V
PP
(See Figures 4 and 5.)
75
84
--
dB
Linearity Distortion
D
2
f = 200 Hz to 40 kHz, I
SL
= 1 mA to 20 mA
V
APP
12 V
PP
(See Figures 4 and 5.)
50
80
--
dB
V
ON
1
k
--------------
4
Lucent Technologies Inc.
Data Sheet
February 1998
LH1465AB/AAE ISDN dc Termination IC
Electrical Characteristics
T
A
= 25
C (continued)
Table 3. Transition Specifications, Normal Operation
(See Figure 6.)
Testing Characteristics
Table 4. Abnormal Conditions Class 1 (Survivable; No Device Damage)
Assume carbon block primary protectors at demarcation point. Assume crowbar protection across the LH1465
device with peak voltages limited to 250 V.
* Voltages are applied from the first lead of the pair to ground with the second lead of the pair grounded, from the
second lead of the pair to ground with the first lead grounded, and from the pair connected together to ground.
Table 5. Abnormal Conditions Class 2 (Fail Safe; No Fire)
Assume carbon block primary protectors at demarcation point. Assume crowbar protection across the LH1465
device with peak voltages limited to 250 V.
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit
Activate Time
t1
See Figure 6.
3.0
22
50
ms
Release Time
t2
See Figure 7.
3.0
10
100
ms
Test Name
Parameter
Value
Obsolete Sealing Current
Voltage
Duty Cycle
72 V
Continuous
MLT Testing
Voltage
Source Impedance
Duration
Duty Cycle
190 V
200
<1 s
25%
Inadvertent Ringing
ac Voltage
dc Voltage
Source Impedance
Duty Cycle
150 Vrms
52 V
200
33% over 6 s
Lightning:*
L1 Normal
Peak Voltage
Rise Time vs. Fall Time
Peak Current
Repetitions (each polarity)
600 V
10 x 1000
s
200 A
4
L2 Normal
Peak Voltage
Rise Time vs. Fall Time
Peak Current
Repetitions (each polarity)
1000 V
10 x 560
s
200 A
2
L3 Normal
Peak Voltage
Rise Time vs. Fall Time
Peak Current
Repetitions (each polarity)
1000 V
10 x 160
s
200 A
2
Test Name
Parameter
Value
ac Power Cross:
Case 1
Voltage
Source Impedance
Duration
300 Vrms--600 Vrms
3
5 s
Case 2
Voltage
Source Current Limit
Duration
0 Vrms--600 Vrms
0 A--2 A
30 minutes
Case 3
Voltage
Source Current Limit
Duration
300 Vrms--600 Vrms
2 A--6 A
5 s
Lucent Technologies Inc.
5
Data Sheet
February 1998
LH1465AB/AAE ISDN dc Termination IC
Component Specifications
Table 6. LED Trigger Specifications During MLT Signaling
Table 7. LED Trigger Specifications During Dial Test Set Signaling (See Figure 10.)
Table 8. Discrete Component Specification (See Figures 10 and 11.)
* Insulation resistance of this part must be >2 G
.
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit
Applied ac Voltage
--
--
60
--
62
V
PEAK
Applied ac Frequency
--
--
2
--
3
Hz
Number of Half Cycles Applied
--
--
6
--
10
--
Total Loop Resistance
--
--
900
--
4500
Required LED Response at the Output of the 6N139:
Number of Pulses per Half Cycle Applied
Pulse Width (opto ON)
Pulse Width (opto OFF)
--
PW
L
PW
H
--
(See Figure 9.)
(See Figure 9.)
--
10
10
1
--
--
--
--
--
--
ms
ms
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit
Applied dc Battery Voltage
--
--
43.5
--
56
Vdc
Frequency (pulses per second)
--
--
4
--
8
--
Percent Break
--
--
40
--
60
%
Number of Pulses
--
--
6
--
10
--
Total Loop Resistance
--
--
200
--
4000
Required LED Response at the Output of the 6N139:
Number of Pulses per Make/Break Applied
Pulse Width (opto ON)
Pulse Width (opto OFF)
--
PW
L
PW
H
--
(See Figure 9.)
(See Figure 9.)
--
10
10
1
--
--
--
--
--
--
ms
ms
Component
Value
Tol. (%)
Type
Function
Name
Sets Current Limit
R1
68
1
1/4 W
Provides Shunt Path During Current Limit
R2
2.2 k
5
4 W
Sets Activate Deactivate Time Constant:
Provides Gate-source Voltage Stabilization for Electronic Inductor
C1*
1
F
10
--
Optoisolator Provides Interface to Maintenance Mode Circuit
PD1
--
--
6N139
6
Lucent Technologies Inc.
Data Sheet
February 1998
LH1465AB/AAE ISDN dc Termination IC
Characteristic Curves
12-1937
Figure 2. I-V Requirement Template, 0 V to 50 V
12-1938
Figure 3. I-V Requirement Template, 0 V to 250 V
TRANSITION
REGION
ON
STATE
OFF
STATE
TRANSITION
REGION
V
ON
I
LKG
1 A
100 mA
10 mA
1 mA
100
A
10
A
1
A
0
0
10
20
30
40
50
ABSOLUTE VOLTAGE (V)
CURRENT
I
MIN1
I
MAX1
V
AN
I
HR
I
BO
I
MAX2
(54 V, 9 mA)
(100 V, 0 mA)
1 A
100 mA
10 mA
1 mA
100
A
10
A
1
A
0
0
50
100
150
200
250
ABSOLUTE VOLTAGE (V)
CURRENT
I
MIN3
I
MIN2
I
MIN1
I
MAX1
(70 V, 70 mA)
Lucent Technologies Inc.
7
Data Sheet
February 1998
LH1465AB/AAE ISDN dc Termination IC
Test Circuits
|
Z
mt
|
=
sig
Linearity = 20 log
+ 20 log
12-1939
Figure 4. Test Circuit for ac Impedance and Linearity
12-1940
Figure 5. Linearity Requirement Template
68
F
ac
GENERATOR
1 mA--20 mA
dc CURRENT
SOURCE
DUT
1 k
V
mt
V
sig
1000
V
mt
V
-------------------------------
V
mt
V
sig
2nd Harm
.
--------------------------------------------------
1000
67.5
-------------
ACCEPTABLE
75
50
LINEARITY (dB)
0
0.5
10.0
10.5
11.0
11.5
12.0
APPLIED ac VOLTAGE (V
PP
)
0
UNACCEPTABLE
8
Lucent Technologies Inc.
Data Sheet
February 1998
LH1465AB/AAE ISDN dc Termination IC
Test Circuits
(continued)
12-1941
Figure 6. Test Circuit for Activate and Deactivate Times
12-1942
Figure 7. Applied Waveform for Activation Test
1
F
DUT
85
85 mH
ACTIVATION: SEE FIG. 7
DEACTIVATION: SEE FIG. 8
500 ms
t1
40 V
30 V
20 V
10 V
0
MEASURE
SOURCE IMPEDANCE:
200
--4 k
43.5 V
Lucent Technologies Inc.
9
Data Sheet
February 1998
LH1465AB/AAE ISDN dc Termination IC
Test Circuits
(continued)
12-1943
Figure 8. Applied Waveform for Deactivation Test
12-1944
Notes:
For series test, open SHUNT rotary dial.
For shunt test, short SERIES rotary dial.
For MLT test, short SERIES rotary dial and open SHUNT rotary dial.
Figure 9. Test Circuit for LED Operation
2.0 mA
1.5 mA
1.0 mA
0.5 mA
0
500 ms
t2
MEASURE
CURRENT SOURCE LIMITED TO 30 V
1
2
3
4
5
6
7
8
+
1
2
3
4
5
6
7
8
ROTARY DIAL
ROTARY DIAL
SERIES
SHUNT
R
L OOP
200
--4 k
900
--4.5 k
(MLT)
V
BAT
+
43.5 V TO 56 V
60 V PEAK, 2 Hz--3 Hz
(MLT)
RING
TIP
R1 68
R2
2.2 k
4 W, 5%
C1
1
F
LH1465AB
PD1
6N139
R3
10 k
1/4 W, 1%
V
OUT
+
V
CC
5 V
85
85 mH
25
25
1
F
1/4 W, 1%
10
Lucent Technologies Inc.
Data Sheet
February 1998
LH1465AB/AAE ISDN dc Termination IC
Test Circuits
(continued)
12-1945
Figure 10. Connection Diagram
12-1946
Note: The Lucent T7256 is suitable for use as the transceiver. See Figure 6 in the T7256 Single-Chip NT1 (SCNT1) Transceiver Data Sheet for
an example of a reference circuit that uses the LH1465 and the T7256.
Figure 11. Typical NT1 Application
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
R1 68
R2
2.2 k
4 W, 5%
LH1465AB
PD1
6N139
C1
1
F
TIP
RING
1/4 W, 1%
R1 68
R2
2.2 k
4 W, 5%
1
2
3
4
5
6
7
8
LH1465AB
1
2
3
4
5
6
7
8
PD1
6N139
C1
1
F
TIP
RING
1/4 W, 1%
200 V--250 V
PROTECTION
TIP
RING
TRANSCEIVER
MAINTENANCE
MODE
CIRCUIT
25
1
F
25
Lucent Technologies Inc.
11
Data Sheet
February 1998
LH1465AB/AAE ISDN dc Termination IC
Outline Diagrams
Dimensions are in millimeters.
8-Pin, Plastic DIP (LH1465AB)
5-4410r.1
16-Pin, Plastic SOG (LH1465AAE)
5-4414r.2
Package Description
Number
of
Pins (N)
Package Dimensions
Maximum
Length (L)
Maximum
Width Without
Leads (B)
Maximum
Width Including
Leads (W)
Maximum
Height
Above
Board (H)
PDIP3 (Plastic Dual-In-Line Package)
8
10.16
6.48
7.87
5.46
SOG (Small Outline, Gull-Wing)
16
10.49
7.62
10.64
2.67
W
H
0.023 MAX
2.54 TYP
0.38 MIN
SEATING PLANE
N
1
PIN #1 IDENTIFIER ZONE
L
B
W
0.024
0.020 MAX
H
0.36 MIN
0.10
SEATING PLANE
1.27 TYP
N
L
B
1
PIN #1 IDENTIFIER ZONE
Data Sheet
February 1998
LH1465AB/AAE ISDN dc Termination IC
For additional information, contact your Microelectronics Group Account Manager or the following:
INTERNET: http://www.lucent.com/mic
ro
E-MAIL: docmaster@mic
ro.lucent.com
U.S.A.: Microelectronics Group, Lucent Technologies Inc., 555 Union Boulevard, Room 30L-15P-BA, Allentown, PA 18103
1-800-372-2447, FAX 610-712-4106 (In CANADA: 1-800-553-2448, FAX 610-712-4106)
ASIA PACIFIC: Microelectronics Group, Lucent Technologies Singapore Pte. Ltd., 77 Science Park Drive, #03-18 Cintech III, Singapore 118256
Tel. (65) 778 8833, FAX (65) 777 7495
JAPAN: Microelectronics Group, Lucent Technologies Japan Ltd., 7-18, Higashi-Gotanda 2-chome, Shinagawa-ku, Tokyo 141, Japan
Tel. (81) 3 5421 1600, FAX (81) 3 5421 1700
EUROPE: Data Requests: MICROELECTRONICS GROUP DATALINE: Tel. (44) 1189 324 299, FAX (44) 1189 328 148
Technical Inquiries: GERMANY: (49) 89 95086 0 (Munich), UNITED KINGDOM: (44) 1344 865 900 (Bracknell),
FRANCE: (33) 1 41 45 77 00 (Paris), SWEDEN: (46) 8 600 7070 (Stockholm), FINLAND: (358) 9 4354 2800 (Helsinki),
ITALY: (39) 2 6601 1800 (Milan), SPAIN: (34) 1 807 1441 (Madrid)
Lucent Technologies Inc. reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use or application. No
rights under any patent accompany the sale of any such product(s) or information.
Copyright 1997 Lucent Technologies Inc.
All Rights Reserved
February 1998
DS97-414ISDN (Replaces DS93-015HVIC and DA95-031ISDN)
Printed On
Recycled Paper
Ordering Information
Device Package Comcode
LH1465AB 8-Pin, Plastic DIP 106444987
LH1465AAE 16-Pin, Plastic SOG 106725054