AGERE LH1465AAE

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.
MLT CIRCUIT
+5 V
R11
137 Ω
R10
R8
10 kΩ
17.8 kΩ
8
6
SCNT1
OPTOIN
PIN
C15
1.0 µF
5
R9
U2
R12
137 Ω
2
3
7
HCPL-0701
2.2 MΩ
CA
1.0 µF
(PLACE THIS CAPACITOR AS
CLOSE AS POSSIBLE TO THE LH1465)
LH1465AB
8
1
TC
PR+
7
2
RS
T
U3
6
3
PD
R
5
4
COM
PR–
R15
1.1 kΩ
2W
ZD
FOR NORTH AMERICAN
APPLICATIONS ONLY
R14
1.1 kΩ
2W
RING
TIP
5-7034(C)
Figure 1. MLT Circuit Showing New Placement of Zener Diode (ZD) and Capacitor (CA)
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 signal 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 ZD (for example, Motorola*
MMSZ4685T1). Capacitor CA is a 1.0 µF ±10% tantalum chip capacitor, with a voltage rating of at least 16 V.
CA 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.
For additional information, contact your Microelectronics Group Account Manager or the following:
http://www.lucent.com/micro
INTERNET:
[email protected]
E-MAIL:
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)
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)
Data Sheet
February 1998
LH1465AB/AAE ISDN dc Termination IC
Features
Description
■
ANSI U-DSL compatible
■
High linearity
■
MLT compatible
■
SARTS compatible
■
Portable test set compatible
Device Code
The LH1465 ISDN dc Termination IC is used on Uinterface digital subscriber lines (U-DSL) and provides 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).
Package Type
LH1465AB
LH1465AAE
8-Pin, Plastic DIP
16-Pin, Plastic SOG
2
1
2.2 kΩ
4 W, 5%
4
PD1
6
1
8
2
7
3
6
4
5
6N139
8
1 µF
15 V, 10%
7
68 Ω
5 1/4 W, 1%
3
POLARITY
GUARD
OPTOISOLATOR
DRIVER
ELECTRONIC INDUCTOR,
BREAKOVER, AND
LATCH CIRCUITS
CURRENT LIMIT AND EXCESS
POWER PROTECTION
12-1947(F)
Figure 1. Functional Diagram/8-Pin DIP
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 termination as described by ANSI Standard T1.601-1991.
Use of the LH1465 requires only a few discrete components. 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 withstand 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 conducts about 150 µA 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.
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 kΩ, 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
1
1
PR+
2
3
4
4
5
8
T
R
PR–
5
6
9
12
COM
PD
7
8
13
16
2, 3
6, 7
10, 11
14, 15
RS
TC
NC
NC
NC
NC
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
Name/Function
Protection resistor positive
side
Tip side of the loop
Ring side of the loop
Protection resistor negative
side
Common
Photodiode (LED input
current)
Current-limit resistor
Timing capacitor
No connection
No connection
No connection
No connection
* Teccor is a trademark and SIDACTOR is a registered trademark of Teccor, Inc.
2
Lucent Technologies Inc.
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 absolute 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.
Parameter
Symbol
Min
Typ
Max
Unit
TA
Tstg
PD
—
—
–40
–40
—
—
—
—
—
—
—
—
85
125
1
300
300
°C
°C
W
°C
Vdc
Ambient Operating Temperature
Storage Temperature
Power Dissipation
Pin Soldering Temperature (t = 15 s)
Maximum Voltage (T/R, R/T)*
* 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 TA = 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 testing requirements.
Table 1. dc Specifications, Normal Operation (See Figures 2 and 3.)
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit
VAN
IBO
VON
ILKG
IH/R
—
—
30.0
—
—
—
0.1
37.0
0.5
13.75
0.001
0.5
39.0
1.0
15
5
1.0
V
mA
V
µA
mA
20
9.0
35
45
—
—
mA
mA
0
—
—
0.2
—
—
mA
mA
mA
0.2
0.3
—
70
V ON
-------------1 kΩ
10
Activate/Nonactivate Voltage
Breakover Current
dc Voltage Drop Active State
dc Leakage Current
Hold/Release Current Active
State
Minimum ON Current
Minimum ON Current
IMIN1
IMIN2
Minimum ON Current
Maximum ON Current
Maximum ON Current
IMIN3
IMAX1
IMAX2
VON < 54 V
54 V ≤ VON ≤ 100 V for 2 s Source
Resistance: 200 Ω to 4 kΩ
VON > 100 V
VON ≤ 70 V
VON > 70 V
Optocoupler LED Current
Active State (6N139)
ILED
—
1 mA ≤ ISL ≤ 20 mA
VOFF = 20 V
—
mA
Table 2. ac Specifications, Normal Operation
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit
ac Impedance
Linearity Distortion
ZMT
D1
10
75
50
84
—
—
kΩ
dB
Linearity Distortion
D2
200 Hz to 50 kHz (See Figure 4.)
f = 200 Hz to 40 kHz, ISL = 1 mA to 20 mA
VAPP ≤ 10.5 VPP (See Figures 4 and 5.)
f = 200 Hz to 40 kHz, ISL = 1 mA to 20 mA
VAPP ≤ 12 VPP (See Figures 4 and 5.)
50
80
—
dB
Lucent Technologies Inc.
3
Data Sheet
February 1998
LH1465AB/AAE ISDN dc Termination IC
Electrical Characteristics TA = 25 °C (continued)
Table 3. Transition Specifications, Normal Operation (See Figure 6.)
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit
t1
t2
See Figure 6.
See Figure 7.
3.0
3.0
22
10
50
100
ms
ms
Activate Time
Release Time
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.
Test Name
Parameter
Value
Obsolete Sealing Current
Voltage
Duty Cycle
72 V
Continuous
MLT Testing
Voltage
Source Impedance
Duration
Duty Cycle
190 V
200 Ω
<1 s
25%
Inadvertent Ringing
ac Voltage
dc Voltage
Source Impedance
Duty Cycle
150 Vrms
52 V
200 Ω
33% over 6 s
L1 Normal
Peak Voltage
Rise Time vs. Fall Time
Peak Current
Repetitions (each polarity)
600 V
10 x 1000 µs
200 A
4
L2 Normal
Peak Voltage
Rise Time vs. Fall Time
Peak Current
Repetitions (each polarity)
1000 V
10 x 560 µs
200 A
2
L3 Normal
Peak Voltage
Rise Time vs. Fall Time
Peak Current
Repetitions (each polarity)
1000 V
10 x 160 µs
200 A
2
Lightning:*
* 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.
Test Name
ac Power Cross:
Case 1
Case 2
Case 3
4
Parameter
Voltage
Source Impedance
Duration
Voltage
Source Current Limit
Duration
Voltage
Source Current Limit
Duration
Value
300 Vrms—600 Vrms
≤3 Ω
5s
0 Vrms—600 Vrms
0 A—2 A
30 minutes
300 Vrms—600 Vrms
2 A—6 A
5s
Lucent Technologies Inc.
Data Sheet
February 1998
LH1465AB/AAE ISDN dc Termination IC
Component Specifications
Table 6. LED Trigger Specifications During MLT Signaling
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit
Applied ac Voltage
Applied ac Frequency
Number of Half Cycles Applied
Total Loop Resistance
Required LED Response at the Output of the 6N139:
Number of Pulses per Half Cycle Applied
Pulse Width (opto ON)
Pulse Width (opto OFF)
—
—
—
—
—
—
—
—
60
2
6
900
—
—
—
—
—
PWL
PWH
—
(See Figure 9.)
(See Figure 9.)
—
10
10
1
—
—
—
—
—
—
ms
ms
62 VPEAK
3
Hz
10
—
4500
Ω
Table 7. LED Trigger Specifications During Dial Test Set Signaling (See Figure 10.)
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit
Applied dc Battery Voltage
Frequency (pulses per second)
Percent Break
Number of Pulses
Total Loop Resistance
Required LED Response at the Output of the 6N139:
Number of Pulses per Make/Break Applied
Pulse Width (opto ON)
Pulse Width (opto OFF)
—
—
—
—
—
—
—
—
—
—
–43.5
4
40
6
200
—
—
—
—
—
–56
8
60
10
4000
Vdc
—
%
—
Ω
—
PWL
PWH
—
(See Figure 9.)
(See Figure 9.)
—
10
10
1
—
—
—
—
—
—
ms
ms
Table 8. Discrete Component Specification (See Figures 10 and 11.)
Component
Function
Sets Current Limit
Provides Shunt Path During Current Limit
Sets Activate Deactivate Time Constant:
Provides Gate-source Voltage Stabilization for Electronic Inductor
Optoisolator Provides Interface to Maintenance Mode Circuit
Value
Tol. (%)
Type
Name
R1
R2
C1*
68 Ω
2.2 kΩ
1 µF
±1
±5
±10
1/4 W
4W
—
PD1
—
—
6N139
* Insulation resistance of this part must be >2 GΩ.
Lucent Technologies Inc.
5
Data Sheet
February 1998
LH1465AB/AAE ISDN dc Termination IC
Characteristic Curves
1A
IMAX1
100 mA
VON
ON
STATE
CURRENT
10 mA
IMIN1
VAN
1 mA
TRANSITION
REGION
IHR
IBO
100 µA
10 µA
1 µA
TRANSITION
REGION
ILKG
OFF
STATE
0
0
10
20
30
40
50
ABSOLUTE VOLTAGE (V)
12-1937
Figure 2. I-V Requirement Template, 0 V to 50 V
1A
(70 V, 70 mA)
IMAX1
100 mA
IMAX2
(54 V, 9 mA)
IMIN1
CURRENT
10 mA
IMIN2
1 mA
100 µA
10 µA
1 µA
(100 V, 0 mA)
0
0
50
100
IMIN3
150
200
250
ABSOLUTE VOLTAGE (V)
12-1938
Figure 3. I-V Requirement Template, 0 V to 250 V
6
Lucent Technologies Inc.
Data Sheet
February 1998
LH1465AB/AAE ISDN dc Termination IC
Test Circuits
68 µF
Vmt
ac
GENERATOR
DUT
1 mA—20 mA
dc CURRENT
SOURCE
1 kΩ
Vsig
× V mt
|Zmt| = 1000
-------------------------------sig
V
1000
V mt
Linearity = 20 log -------------------------------------------------- + 20 log ------------V sig – 2nd Harm .
67.5
12-1939
Figure 4. Test Circuit for ac Impedance and Linearity
ACCEPTABLE
LINEARITY (dB)
75
UNACCEPTABLE
50
0
0
0.5
10.0
10.5
11.0
11.5
12.0
APPLIED ac VOLTAGE (VPP)
12-1940
Figure 5. Linearity Requirement Template
Lucent Technologies Inc.
7
Data Sheet
February 1998
LH1465AB/AAE ISDN dc Termination IC
Test Circuits (continued)
1 µF
DUT
ACTIVATION: SEE FIG. 7
85 mH
85 Ω
DEACTIVATION: SEE FIG. 8
12-1941
Figure 6. Test Circuit for Activate and Deactivate Times
43.5 V
40 V
SOURCE IMPEDANCE:
200 Ω—4 kΩ
30 V
t1
20 V
MEASURE
500 ms
10 V
0
12-1942
Figure 7. Applied Waveform for Activation Test
8
Lucent Technologies Inc.
Data Sheet
February 1998
LH1465AB/AAE ISDN dc Termination IC
Test Circuits (continued)
2.0 mA
CURRENT SOURCE LIMITED TO 30 V
MEASURE
1.5 mA
500 ms
1.0 mA
t2
0.5 mA
0
12-1943
Figure 8. Applied Waveform for Deactivation Test
RL OOP
200 Ω—4 kΩ
900 Ω—4.5 kΩ (MLT)
SERIES
ROTARY DIAL
1 µF
25 Ω
85 mH
+
85 Ω
25 Ω
VBAT
–43.5 V TO –56 V
60 V PEAK, 2 Hz—3 Hz
(MLT)
SHUNT
ROTARY DIAL
RING
TIP
R2
2.2 kΩ
4 W, 5%
1
8
2
7
3
6
4
5
R1 68 Ω
1/4 W, 1%
LH1465AB
PD1
C1
1 µF
1
8
2
7
3
6
4
5
+
R3
10 kΩ
1/4 W, 1%
VCC
5V
+
VOUT
–
6N139
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
Lucent Technologies Inc.
9
Data Sheet
February 1998
LH1465AB/AAE ISDN dc Termination IC
Test Circuits (continued)
RING TIP
1
2.2 kΩ
4 W, 5%
8
R1 68 Ω
PD1
C1
1 µF
2
7
1
8
3
6
2
7
4
5
3
6
4
5
R2
1/4 W, 1%
LH1465AB
6N139
12-1945
Figure 10. Connection Diagram
1 µF
25 Ω
TIP
TIP
200 V—250 V
PROTECTION RING
2.2 kΩ
4 W, 5%
R2
1
8
2
7
3
6
4
5
R1 68 Ω
C1
1 µF
TRANSCEIVER
1/4 W, 1%
LH1465AB
25 Ω
RING
PD1
1
8
2
7
3
6
4
5
MAINTENANCE
MODE
CIRCUIT
6N139
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
10
Lucent Technologies Inc.
Data Sheet
February 1998
LH1465AB/AAE ISDN dc Termination IC
Outline Diagrams
Dimensions are in millimeters.
8-Pin, Plastic DIP (LH1465AB)
L
N
B
1
W
PIN #1 IDENTIFIER ZONE
H
SEATING PLANE
0.38 MIN
2.54 TYP
0.023 MAX
5-4410r.1
16-Pin, Plastic SOG (LH1465AAE)
L
N
B
1
PIN #1 IDENTIFIER ZONE
W
H
SEATING PLANE
0.10
1.27 TYP
0.020 MAX
0.024
0.36 MIN
5-4414r.2
Package Description
Package Dimensions
Number
of
Maximum
Pins (N) Length (L)
PDIP3 (Plastic Dual-In-Line Package)
SOG (Small Outline, Gull-Wing)
Lucent Technologies Inc.
8
16
10.16
10.49
Maximum
Width Without
Leads (B)
Maximum
Width Including
Leads (W)
Maximum
Height
Above
Board (H)
6.48
7.62
7.87
10.64
5.46
2.67
11
Data Sheet
February 1998
LH1465AB/AAE ISDN dc Termination IC
Ordering Information
Device
Package
LH1465AB
LH1465AAE
8-Pin, Plastic DIP
16-Pin, Plastic SOG
Comcode
106444987
106725054
For additional information, contact your Microelectronics Group Account Manager or the following:
INTERNET:
http://www.lucent.com/mic
ro
E-MAIL:
[email protected]
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