AGERE ATTL7582BC, ATTL7582BAE, ATTL7582AC, ATTL7582AAE Datasheet
Data Sheet
November 1999
L7582 Tip Ring Access Switch
Features
Small size/surface-mount packaging
■
Monolithic IC reliability
■
Low impulse noise
■
Make-before-break, break-before-make operation
■
Clean, bounce-free switching
■
Low, matched ON-resistan ce
■
Built-in current limiting, thermal shutdown, and
■
SLIC protection
5 V only operation, very low power consumption
■
Battery monitor, all OFF state upon loss of battery
■
No EMI
■
Latched logic level inputs, no drive circuitry
■
Only one external protector required
■
Applications
Central office
■
DLC
■
PBX
■
DAML
■
HFC/FITL
■
Description
The L7582 Tip Ring Access Switch is a monolithic
solid-state device that provides the switching
functionality of a 2 form C switch.
The L7582 is designed to provide power ringing
access to tip and ring in central office, digital loop
carrier, private branch exchange, digitally added
main line, and hybrid fiber coax/fiber-in-the-loop ana-
log line card applications. An additional pair of solidstate contacts provides access to the telephone loop
for line test access or message waiting in the PBX
application.
The L7582 has four states: the idle talk state (line
break switches closed, ringing and loop access
switches open), the power ringing state (ringing
access switches closed, line break and loop access
switches open), loop access state (loop access
switches closed, line break and ringing access
switches open), and an all OFF state.
The L7582 offers break-before-make or make-beforebreak switching, with simple logic level input control.
Because of the solid-state construction, voltage transients generated when switching into an inductive
ringing load during ring cadence or ring trip are minimized, possibly eliminating the need for external zero
cross switching circuitry. State control is via logic
level inputs so no additional driver circuitry is
required.
The line break switch is a linear switch that has
exceptionally low ON-resistance and an excellent
ON-resistance matching characteristic. The ringing
access switch has a breakdown voltage rating
>480 V which is sufficiently high, with proper protection, to prevent breakdown in the presence of a transient fault condition (i.e., passing the transient on to
the ringing generator).
Incorporated into the L7582A
xx is a diode bridge/
SCR clamping circuit, current-limiting circuitry, and a
thermal shutdown mechanism to provide protection
to the SLIC device and subsequent circuitry during
fault conditions (see Figure 1). Positive and negative
lightning is reduced by the current-limiting circuitry
and steered to ground via diodes and the integrated
SCR. Power cross is also reduced by the currentlimiting and thermal shutdown circuits.
L7582 Tip Ring Access Switch
Data Sheet
November 1999
Description
The L7582B
(continued)
xx version provides only an integrated
diode bridge along with current limiting and thermal
shutdown as shown in Figure 2. This will cause positive
faults to be directed to ground and negative faults to
battery. In either polarity, faults are reduced by the current-limit and/or thermal shutdown mechanisms.
To protect the L7582 from an overvoltage fault condition, use of a secondary protector is required. The secondary protector must limit the voltage seen at the tip/
ring terminals to prevent the breakdown voltage of the
switches from being exceeded. To minimize stress on
the solid- state contacts, use of a foldback- or crowbartype secondary protector is recommended. With proper
choice of secondary protection, a line card using the
L7582 will meet all relevant ITU-T, LSSGR, FCC, or
protection requirements.
UL*
The L7582 operates from a 5 V supply only. This
gives the device extremely low idle and active power
dissipation and allows use with virtually any range of
battery voltage. This makes the L7582 especially
appropriate for remote power applications such as
DAML or FOC/FITL or other Bellcore TA 909 applications where power dissipation is particularly critical.
A battery voltage is also used by the L7582, only as a
reference for the integrated protection circuit. The
L7582 will enter an all OFF state upon loss of battery.
Pin Information
GND
1
F
BAT
T
2
SW1 SW2
LINE
T
3
SW3
RINGING
T
ACCESS
T
Note: Shown with A version protection. The 16-pin SOG is avail ab le
4
SW5
5
DD
V
6
SD
T
7
GND
D
8
with either A or B version protection.
SCR
AND
TRIP
CKT
SW4
SW6
LOGIC
CONTROL
Figure 1. 16-Pin, Plastic SOG
16
15
14
13
12
11
10
9
BAT
V
BAT
R
LINE
R
RINGING
R
ACCESS
R
LATCH
RING
IN
ACCESS
IN
12-2306.i (F)
During power ringing, to turn on and maintain the ON
state, the ring access switch will draw a nominal 2 mA
or 4 mA from the ring generator.
The L7582 device is packaged in a 16-pin, plastic DIP
package (L7582AC/BC) and a 16-pin, plastic SOG
package (L7582AAE/BAE). The L7582AAE/BAE are
pin compatible with the L7542AAE/BAE.
*UL is a registered trademark of Underwriters Laboratories, Inc.
GND
1
F
BAT
T
2
SW1
LINE
T
3
SW3
RINGING
T
ACCESS
T
Note: Shown with B version protection. The 16-pin DIP is available
4
SW5
5
DD
V
6
SD
T
7
GND
D
8
with either A or B version protection.
SW2
SW4
SW6
LOGIC
CONTROL
16
15
14
13
12
11
10
9
12-2306.c (F)
BAT
V
BAT
R
LINE
R
RINGING
R
ACCESS
R
LATCH
RING
IN
ACCESS
IN
Figure 2. 16-Pin, Plastic DIP
22 Lucent Technologies Inc.
Data Sheet
November 1999
L7582 Tip Ring Access Switch
Pin Information
(continued)
Table 1. Pin Descriptions
DIP SOG Symbol Description DIP SOG Symbol Description
11F
GND
Fault ground. 16 16 V
BAT
Battery voltage. Used as a ref-
erence for protection circuit.
22 T
33T
44T
BAT
LINE
RINGING
Connect to TIP on SLIC side. 15 15 R
Connect to TIP on line side. 14 14 R
Connect to return ground for ring-
13 13 R
BAT
LINE
RINGING
Connect to RING on SLIC side.
Connect to RING on line side.
Connect to ringing generator.
ing generator.
55T
66 V
ACCESS
DD
Test access. 12 12 R
5 V supply. 11 11 LATCH Data latch control, active-high,
ACCESS
Test access.
transparent low.
77 T
SD
Temperature shutdown pin. Can
10 10 IN
RING
Logic level input switch control.
be used as a logic level input or
output. See T ab le 13, Truth Table,
and the Switching Behavior section of this data sheet for input pin
description. As an output, will
read 5 V when device is in its
operational mode and 0 V in the
thermal shutdown mode. To disable the thermal shutdown mechanism, tie this pin to 5 V (not
recommended).
88D
GND
Digital ground. 9 9 IN
ACCESS
Logic level input switch control.
Absolute Maximum Ratings
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 given in the operational sections of the
data sheet. Exposure to absolute maximum ratings for
extended periods can adversely affect device reliability.
Table 2. Absolute Maximum Ratings Parameters
Parameter Min Max Unit
Operating Temperature Range –40 110
Storage Temperature Range –40 150
Relative Humidity Range 5 95 %
Pin Soldering Temperature (t =
—260°C
10 s max)
5 V Power Supply — 7 V
Battery Supply — –85 V
Logic Input Voltage — 7 V
Input-to-output Isolation — 330 V
Pole-to-pole Isolation — 330 V
C
°
C
°
Handling Precautions
Although protection circuitry has been designed into
this device, proper precautions should be taken to
avoid exposure to electrostatic discharge (ESD) during
handling and mounting. Lucent Technologies Microelectronics Group employs a human-body model
(HBM) and a charged-device model (CDM) for ESDsusceptibility testing and protection design evaluation.
ESD voltage thresholds are dependent on the circuit
parameters used to define the model. No industry-wide
standard has been adopted for CDM. However, a standard HBM (resistance = 1500 Ω, capacitance = 100 pF)
is widely used and therefore can be used for comparison purposes. The HBM ESD threshold presented
here was obtained by using these circuit parameters.
Table 3. HBM ESD Threshold Voltage
Device Rating
L7582 1000 V
Lucent Technologies Inc. 3
L7582 Tip Ring Access Switch
Data Sheet
November 1999
Electrical Characteristics
TA = –40 °C to +85 °C, unless otherwise specified.
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 4. Power Supply Specifications
Supply Min Typ Max Unit
V
DD
V
BAT*
BAT
*V
is used only as a reference for internal protection circuitry . I f V
in the all OFF state until the battery voltage drops below –15 V.
Table 5. Break Switches, 1 and 2
Parameter Test Condition Measure Min Typ Max Unit
OFF-state Leakage
Current:
+25 °C
Vswitch (differential) = –60 V to +260 V
+85 °C
Vswitch (differential) = –60 V to +270 V
–40 °C
Vswitch (differential) = –60 V to +250 V
ON-resistance
(SW1, SW2):
+25 °C
+85 °C
–40 °C
ON-resistance Match Per ON-resistance test
ON-state Voltage* Iswitch = I
dc Current Limit:
+85 °C
–40 °C
Dynamic Current Limit
(t = < 0.5 µs)
Isolation:
+25 °C
+85 °C
–40 °C
dV/dt Sensitivity
†
4.5 5 5.5 V
–19 — –72 V
BAT
rises above –10 V, the device will enter an all OFF state and will remain
Vswitch (differential) = –320 V to Gnd
Vswitch (differential) = –330 V to Gnd
Vswitch (differential) = –310 V to Gnd
LINE
T
= ±10 mA, ±40 mA, T
LINE
T
= ±10 mA, ±40 mA, T
LINE
T
= ±10 mA, ±40 mA, T
BAT
BAT
BAT
= –2 V
= –2 V
= –2 V
Iswitch
Iswitch
Iswitch
ON
V
∆
ON
V
∆
ON
V
∆
Magnitude
condition of SW1, SW2
LIMIT
@ 50 Hz/60 Hz V
Vswitch (on) = ±10 V
Vswitch (on) = ±10 V
Break switches in ON state; ringing
ON
R
SW1 – RON SW2
ON
Iswitch
Iswitch
Iswitch — 2.5 — A
access switches off; apply ±1000 V at
10/1000 µs pulse; appropriate second-
ary protection in place
Vswitch (both poles) = ±320 V,
Iswitch
Logic inputs = Gnd
Vswitch (both poles) = ±330 V,
Iswitch
Logic inputs = Gnd
Vswitch (both poles) = ±310 V,
Iswitch
Logic inputs = Gnd
———200—V/µs
—
—
—
—
—
—
—
19.5
—
—
—
14.5
—0.21.0
1
1
1
—
28
—
µ
µ
µ
Ω
Ω
Ω
Ω
——220V
80————
250mAmA
—
—
—
—
—
—
1
µ
1
µ
1
µ
A
A
A
A
A
A
* This parameter is not tested in production. Choice of secondary protector should ensure this rating is not exceeded.
† Applied voltage is 100 Vp-p square wave at 100 Hz.
44 Lucent Technologies Inc.
Data Sheet
November 1999
L7582 Tip Ring Access Switch
Electrical Characteristics
(continued)
Table 6. Ring Return Switch, 3
Parameter Test Condition Measure Min Typ Max Unit
OFF-state Leakage
Current (SW3):
+25 °C
Vswitch (differential) = –320 V to Gnd
Iswitch
—
—
1
Vswitch (differential) = –60 V to +260 V
+85 °C
Vswitch (differential) = –330 V to Gnd
Iswitch
—
—
1
Vswitch (differential) = –60 V to +270 V
–40 °C
Vswitch (differential) = –310 V to Gnd
Iswitch
—
—
1
Vswitch (differential) = –60 V to +250 V
dc Current Limit Vswitch (on) = ±10 V Iswitch — 200 — mA
Dynamic Current
Limit (t = < 0.5 µs)
Break switches in ON state; ringing access switches
off; apply ±1000 V at 10/1000 µs pulse; appropriate
Iswitch — 2.5 — A
secondary protection in place
ON-resistance Iswitch (on) = ±0 mA, ±10 mA
LIMIT
ON-state Voltage* Iswitch = I
@ 50 Hz/60 Hz V
ON
V
∆
ON
——100
——130V
Isolation:
+25 °C
+85 °C
–40 °C
dV/dt Sensitivity
†
Vswitch (both poles) = ±320 V, Logic inputs = Gnd
Vswitch (both poles) = ±330 V, Logic inputs = Gnd
Vswitch (both poles) = ±310 V, Logic inputs = Gnd
———200—V/µs
Iswitch
Iswitch
Iswitch
—
—
—
—
—
—
1
1
1
A
µ
A
µ
A
µ
Ω
A
µ
A
µ
A
µ
* This parameter is not tested in production. Choice of secondary protector should ensure this rating is not exceeded.
† Applied voltage is 100 Vp-p square wave at 100 Hz.
Table 7. Ringing Access Switch, 4
Parameter Test Condition Measure Min Typ Max Unit
OFF-state Leakage
Current (SW4):
+25 °C
Vswitch (differential) = –255 V to +210 V
Iswitch
—
—
1
Vswitch (differential) = +255 V to –210 V
+85 °C
Vswitch (differential) = –270 V to +210 V
Iswitch
—
—
1
Vswitch (differential) = +270 V to –210 V
–40 °C
Vswitch (differential) = –245 V to +210 V
Iswitch
—
—
1
Vswitch (differential) = +245 V to –210 V
ON Voltage Iswitch (on) = ±1 mA — — — 3 V
Ring Generator Cur-
rent During Ring
Steady-state Current
Surge Current
†
CC
V
= 5 V
ACCESS
IN
†
= 0
————150mA
————2A
RINGSOURCE
I
—*—mA
Release Current — — — 500 —
ON-resistance Iswitch (on) = ±70 mA, ±80 mA
on
V
∆
—12
Isolation:
1
—
+25 °C
+85 °C
–40 °C
dV/dt Sensitivity
Vswitch (both poles) = ±320 V, Logic inputs = Gnd
Vswitch (both poles) = ±330 V, Logic inputs = Gnd
Vswitch (both poles) = ±310 V, Logic inputs = Gnd
‡
—
Iswitch
Iswitch
Iswitch
——200—V/
—
—
—
—
—
1
1
A
µ
A
µ
A
µ
A
µ
Ω
A
µ
A
µ
A
µ
s
µ
* At the time of publication of this data sheet, the current device design will be a nominal 4 mA. Devices are being redesigned to reduce this
current to less than 2 mA nominally. Consult your Lucent Technologies Micr oelectronics Group account executive for additional details.
† Choice of secondary protector and series current-limit resistor should ensure these ratings are not exceeded.
‡ Applied voltage is 100 Vp-p square wave at 100 Hz.
Lucent Technologies Inc. 5
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