Line Card Access Switch
I
NTEGRATED
C
IRCUITS
D
IVISION
Features
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TTL Logic Level Inputs for 3.3V Logic Interfaces
Smart Logic for Power Up / Hot Plug State Control
Improved Switch dV/dt Immunity of 500 V/s
Monolithic IC Reliability
Low, Matched R
ON
Eliminates the Need for Zero-Cross Switching
Flexible Switch Timing for Transition from Ringing
Mode to Idle/Talk Mode.
Clean, Bounce-Free Switching
Tertiary Protection Consisting of Integrated Current
Limiting, Voltage Clamping, and Thermal Shutdown
for SLIC Protection
5V Operation with Power Consumption < 10 mW
Intelligent Battery Monitor
Latched Logic-Level Inputs, no External Drive
Circuitry
Small 16-pin SOIC
VoIP Gateways
Central office (CO)
Digital Loop Carrier (DLC)
PBX Systems
Digitally Added Main Line (DAML)
Hybrid Fiber Coax (HFC)
Fiber in the Loop (FITL)
Pair Gain System
Channel Banks
CPC7591
Description
The CPC7591 is a member of IXYS Integrated
Circuits Division’s next generation Line Card Access
Switch (LCAS) family. This monolithic 4-pole solid
state switch is available in a 16-pin SOIC package. It
provides the necessary functions to replace the
2-Form-C electromechanical ringing relay and it’s
associated snubber circuitry on traditional analog line
cards or contemporary integrated voice and data (IVD)
line cards found in Central Office (CO), Access, and
PBX equipment. Because this device contains solid
state switches for tip and ring line break and for ringing
injection/return, it requires only a +5 V supply for
operation and TTL logic-level inputs for control. The
CPC7591 provides stable start-up conditioning during
system power up and for hot plug insertion
applications. Once active, the inputs respond to
traditional TTL logic levels, enabling the CPC7591 to
be used with 3.3V-only logic.
For negative transient voltage protection the
CPC7591BA version includes SCRs to provide
voltage fold-back protection for the SLIC and
subsequent circuitry, while the CPC7591BB version
utilizes clamping diodes to the V
BAT
pin. For positive
transient voltage protection all versions provide
clamping diodes to the F
GND
pin.
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Applications
Ordering Information
Part #
Description
16-Pin SOIC, with Protection SCR, 50/Tube
16-Pin SOIC, with Protection SCR, 1000/Reel
16-Pin SOIC, without Protection SCR, 50/Tube
16-Pin SOIC, without Protection SCR, 1000/Reel
Pb
e
3
CPC7591BA
CPC7591BATR
CPC7591BB
CPC7591BBTR
Figure 1. CPC7591 Block Diagram
+5
Vdc
6 T
RINGING
7
V
DD
Tip
Secondary
Protection
T
LINE
3
X
SW3
SW1
CPC7591
2 T
BAT
X
SLIC
R
LINE
14
SW2
15 R
BAT
L
A
T
C
H
8
T
SD
Ring
X
X
SW4
V
REF
Switch
Control
Logic
10
11
IN
RINGING
LATCH
12 R
RINGING
V
BAT
300
Ω
(min.)
RINGING
1
F
GND
SCR Trip Circuit
(CPC7591BA)
16
V
BAT
9
D
GND
DS-CPC7591-R06
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I
NTEGRATED
C
IRCUITS
D
IVISION
CPC7591
1. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1 Package Pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 Pinout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4 ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5 General Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6 Switch Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6.1 Break Switches, SW1 and SW2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6.2 Ringing Return Switch, SW3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6.3 Ringing Switch, SW4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.7 Digital I/O Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.8 Voltage and Power Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.9 Protection Circuitry Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.10 Truth Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2. Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 Under Voltage Switch Lock Out Circuitry. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2.2 Hot Plug and Power Up Circuit Design Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3 Switch Logic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3.1 Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3.2 Switch Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3.3 Make-Before-Break Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3.4 Break-Before-Make Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4 Data Latch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.5 T
SD
Pin Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.6 Ringing Switch Zero-Cross Current Turn Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.7 Power Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.8 Battery Voltage Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.9 Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.9.1 Diode Bridge/SCR. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.9.2 Current Limiting function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.10 Thermal Shutdown. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.11 External Protection Elements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3. Manufacturing Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1 Moisture Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 ESD Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3 Reflow Profile. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4 Board Wash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.5 Mechanical Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.5.1 CPC7591BA, CPC7591BB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.5.2 CPC7591BATR, CPC7591BBTR Tape & Reel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
3
3
4
4
4
5
5
6
7
8
8
9
9
10
10
10
10
11
11
11
11
11
12
13
13
13
13
13
14
14
14
14
15
16
16
16
16
16
17
17
17
2
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R06
I
NTEGRATED
C
IRCUITS
D
IVISION
1. Specifications
1.1 Package Pinout
1.2 Pinout
CPC7591
CPC7591
F
GND
1
T
BAT
2
T
LINE
3
NC 4
NC 5
T
RINGING
6
16
V
BAT
Pin
1
2
3
14 R
LINE
13 NC
12 R
RINGING
11 LATCH
10 IN
RINGING
9 D
GND
Name
F
GND
T
BAT
T
LINE
NC
NC
V
DD
T
SD
D
GND
LATCH
NC
R
LINE
R
BAT
V
BAT
Fault ground.
Description
15 R
BAT
Tip lead to the SLIC.
Tip lead of the line side.
No connection.
No connection.
+5 V supply.
Temperature shutdown pin.
Digital ground.
Data latch enable control input.
No connection.
Ring lead of the line side.
Ring lead to the SLIC.
Battery supply.
4
5
6
7
8
9
10
11
12
13
14
15
16
T
RINGING
Ringing generator return.
V
DD
7
T
SD
8
IN
RINGING
Logic control input.
R
RINGING
Ringing generator source.
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I
NTEGRATED
C
IRCUITS
D
IVISION
1.3 Absolute Maximum Ratings
Parameter
+5 V power supply (V
DD
)
Battery Supply
D
GND
to F
GND
Separation
Logic input voltage
Logic input to switch output
isolation
Switch open-contact
isolation (SW1, SW2, SW3)
Switch open-contact
isolation (SW4)
Operating relative humidity
Operating temperature
Storage temperature
Minimum Maximum
-0.3
-
-5
-0.3
-
-
-
5
-40
-40
7
-85
+5
V
DD
+ 0.3
320
320
465
95
+110
+150
Unit
V
V
V
V
V
V
V
%
C
C
1.4 ESD Rating
ESD Rating (Human Body Model)
1000 V
CPC7591
1.5 General Conditions
Unless otherwise specified, minimum and maximum
values are guaranteed by production testing
requirements.
Typical values are characteristic of the device at
+25C and are the result of engineering evaluations.
They are provided for information purposes only and
are not part of the manufacturing testing requirements.
Specifications cover the operating temperature range
T
A
= -40C to +85C. Also, unless otherwise specified
all testing is performed with V
DD
= 5V
dc
, logic low
input voltage is 0V
dc
and logic high voltage is 5V
dc
.
Absolute maximum electrical ratings are at 25C.
Absolute maximum ratings are stress ratings. Stresses in
excess of these ratings can cause permanent damage to
the device. Functional operation of the device at conditions
beyond those indicated in the operational sections of this
data sheet is not implied.
4
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I
NTEGRATED
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1.6 Switch Specifications
1.6.1 Break Switches, SW1 and SW2
Parameter
Test Conditions
V
SW1
(differential) = T
LINE
to T
BAT
V
SW2
(differential) = R
LINE
to R
BAT
All-Off state.
+25 C,
V
SW
(differential) = -320 V to gnd
V
SW
(differential) = +260 V to -60 V
+85 C,
V
SW
(differential) = -330 V to gnd
V
SW
(differential) = +270 V to -60 V
-40 C,
V
SW
(differential) = -310 V to gnd
V
SW
(differential) = +250 V to -60 V
I
SW
(on) = ±10 mA, ±40 mA,
R
BAT
and T
BAT
= -2 V
On Resistance
+25 C
+85 C
-40 C
On Resistance
Matching
Per SW1 & SW2 On Resistance test
conditions.
V
SW
(on) = ±10V
DC current limit
+25 C
+85 C
-40 C
Dynamic current limit
(t
0.5
s)
Break switches on, all other switches
off. Apply ±1 kV 10x1000
s
pulse with
appropriate protection in place.
Logic Inputs = GND
Logic input to switch
output isolation
+25 C, V
SW
(T
LINE
, R
LINE
) = ±320 V
+85 C, V
SW
(T
LINE
, R
LINE
) = ±330 V
-40 C, V
SW
(T
LINE
, R
LINE
) = ±310 V
dV/dt sensitivity
100VPP Square Wave, 100Hz
(Not production tested - limits are
guaranteed by design and quality
control sampling audits.)
-
I
SW
-
-
-
-
0.1
0.3
0.1
500
-
1
I
SW
I
SW
-
80
-
-
300
160
400
2.5
-
425
-
R
ON
-
R
ON
-
14.5
20.5
10.5
0.15
-
28
-
0.8
I
SW
-
0.1
Symbol
Minimum
Typical
Maximum
CPC7591
Unit
Off-State
Leakage Current
0.3
1
A
0.1
mA
A
A
V/s
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