6H–1
FEATURES
•
Solid state relay and an autopolarity opto-
coupler in a single package
•
Low-profile, small-outline package (SOP)
available
•
Up to 5300 Vrms I/O minimum
•
Surface mountable
•
Optocoupler
— Bidirectional current detection
•
Solid state relay
— 1 Form A or B contacts
— Current-limit protection
— High-surge capability
— Linear, ac/dc operation
— Clean, bounce-free switching
— Low power consumption
— High-reliability monolithic receptor
•
UL recognized
•
CSA certified
•
BABT certificate of recognition to BS6301
APPLICATIONS
•
General telecom switching
— On/off-hook control
— Dial pulse
— Ring-current detection
— Loop-current sensing
•
PCMCIA Type 2 modem cards
DESCRIPTION
A Telecom Switch consists of an optically isolated, SPST solid-state
relay (SSR) and a bidirectional input optocoupler in a single
package. The SSR is ideal for performing switchhook and dial-
pulse switching while the optocoupler performs ring detect and
loop current sensing functions.
The SSR is integrated on a monolithic receptor die by using a
Smart Power BiCMOS technology. The SSR features low ON-resis-
tance, high breakdown voltage, and current-limit circuitry that
protects the relay from telephone line induced lightning surges.
The optocoupler provides bidirectional current sensing via two
antiparallel GaAIAs infrared emitting diodes. The optocoupler
provides a minimum current transfer ratio (CTR) of 33% or 100%.
The Telecom Switches are available in four different packaging
configurations: an 8-pin, plastic DIP; an 8-pin, surface-mount gull
wing for circuit boar d mounting; an 8-pin, S-bend gull wing; and an
18-pin, 2 mm high, small-outline package for use in Type 2
PCMCIA boards.
Telecom Switches
6H1.11SSR telcmSw copy Page 1 Monday, June 2, 1997 12:04 PM
6H–2
Telecom Switches — Opto Channel CTR Selection Table
* Specifications are preliminary.
Contact
Form Part
Number
Optocoupler
I/O Isolation
(Min) Package Type
(see Selection
Guide)
Output Characteristics Input Characteristics
Current Transfer Ratio
(Min)
I
F
=6 mA, V
CE
=0.5 V
LED Continuous
Forward Current
% mA Vrms
1 Form A LH1529AB 33 50 5300 8-pin DIP
LH1529AAC 8-pin SMD
LH1529ACC 8-pin S Bend
LH1529BB 100 50 5300 8-pin DIP
LH1529BAC 8-pin SMD
LH1529BCC 8-pin S Bend
LH1548ACE* 33 50 1500 18-pin SOP
LH1549AB* 33 120 5300 8-pin DIP
LH1549AAC* 8-pin SMD
LH1549ACC* 8-pin S Bend
1 Form B LH1528AB 33 50 5300 8-pin DIP
LH1528AAC 8-pin SMD
LH1528ACC 8-pin S Bend
Telecom Switch Selection Guide
6H1.11SSR telcmSw copy Page 2 Monday, June 2, 1997 12:04 PM
6H–3
Absolute Maximum Ratings T
A
=25
°
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 this
document. Exposure to Absolute Maximum Ratings for
extended periods of time can adversely affect r eliability.
Parameter Symbol Test Conditions LH1528A LH1529A LH1529B LH1549A Units
Ambient Operating
Temperature Range T
A
— –40 to +85 –40 to +85 –40 to +85 –40 to +85
°
C
Storage Temperature Range T
stg
— –40 to
+150 –40 to
+150 –40 to
+150 –40 to
+150
°
C
Pin Soldering Temperature T
S
t=10 s max 260 260 260 260
°
C
Input/Output Isolation
Voltage V
ISO
— 3750 3750 3750 5300 Vrms
SSR Ratings
LED Continuous Forward
Current I
F
— 50 50 50 50 mA
LED Reverse Voltage V
R
I
R
≤
10
µ
A 5 5 5 5 V
dc or Peak ac Load Voltage V
L
I
L
≤
50
µ
A 350 350 350 400 V
Continuous dc Load Current
Unidirectional Operation I
L
— 150 120 120 120 mA
Output Power Dissipation
(continuous) P
DISS
— 600 600 600 600 mW
Optocoupler Ratings
LED Continuous Forward
Current I
F
— 50 50 50 120 mA
Collector-Emitter
Breakdown Voltage BV
CEO
— 30 30 30 30 V
Phototransistor Power
Dissipation P
DISS
— 150 150 150 150 mW
1 Form B/Phototransistor
LH1528
1 Form A/Phototransistor
LH1529, LH1549
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6H–4
SSR Recommended Operating Conditions
120
90
60
30
–40 –20 0 20 40 60 80
AMBIENT TEMPERATURE (°C)
LOAD CURRENT (mA)
0
150
I
FON
=
5 mA to 20 mA
LH1528A
I
FON
= 2 mA
I
FON
= 4 mA
I
FON
= 3 mA
80
60
0
40
120
100
20
–40 –20 0 20 40 60 80
I
FON
=
5 mA to 20 mA
I
FON
= 2 mA
I
FON
= 3 mA
I
FON
= 4 mA
LH1529A
LH1529B
LOAD CURRENT (mA)
AMBIENT TEMPERATURE (
°
C)
LH1528A, LH1529A, LH1529B, LH1549
6H1.11SSR telcmSw copy Page 4 Monday, June 2, 1997 12:04 PM
6H–5
† I
L
= 25mA.
Parameter Symbol Test Conditions Values LH1528A LH1529A LH1529B LH1549A Units
I
N
P
U
T
LED Forward
Current
for Switch Turn-on
I
Fon
I
L
=100 mA
t=10 ms
Min 0.2 — — — mA
Typ 0.9 0.7 0.7 0.5 mA
Max — 2.0 2.0 1.0 mA
LED Forward
Current
for Switch Turn-off
I
Foff
Min — 0.2 0.2 0.1 mA
Typ 1.0 0.6 0.6 0.4 mA
Max 2.0 — — — mA
V
L
±
300 300 300 350 V
LED Forward
Voltage V
F
I
F
=10 mA
I
F
=3 mA
(LH1549)
Min 1.15 1.15 1.15 0.80 V
Typ 1.26 1.26 1.26 1.20 V
Max 1.45 1.45 1.45 1.40 V
O
U
T
P
U
T
ON-resistance
ac/dc
Pins 4 (
±
) to 6 (
±
)
R
ON
I
F
=5 mA
I
F
=0 mA
(LH1528)
I
L
=50 mA
Min 12 12 12 17
Ω
Typ 20 20 20 25
Ω
Max 25 25 25 33
Ω
Current Limit
ac/dc
Pins 4 (
±
) to 6 (
±
)
I
LMT
I
F
=5 mA
t=5 ms
Min — 170 170 170 mA
Typ — 210 210 210 mA
Max — 250 250 270 mA
V
L
±
— 6 6 7 V
Off-state
Leakage Current — I
F
=0 mA
I
F
=5 mA
(LH1528)
V
L
=100 V
Min — — — nA
Typ 70 0.02 0.02 0.04 nA
Max 1000 200 200 200 nA
I
F
=0 mA
I
F
=5 mA
(LH1528)
Min — — — —
µ
A
Typ 0.08 — — —
µ
A
Max 1.0 1.0 1.0 1.0
µ
A
V
L
±
350 350 350 400 V
Output
Capacitance
Pin 7 to 8
— I
F
=0 mA
I
F
=5 mA
(LH1528)
V
L
=1 V
Min — — — — pF
Typ 45 55 55 50 pF
Max — — — — pF
I
F
=0 mA
I
F
=5 mA
(LH1528)
V
L
=50 V
Min — — — — pF
Typ 10 10 10 9 pF
Max — — — — pF
T
R
A
N
S
F
E
R
Input/Output
Capacitance C
ISO
V
ISO
=1 V
Min — — — — pF
Typ 1.3 1.3 1.3 1.3 pF
Max — — — — pF
Turn-on Time t
ON
I
F
=5 mA
I
L
=50 mA
Min — — — — ms
Typ 2.0 1.3 1.3 0.5 ms
Max 3.0 2.5 2.5 2.0 ms
Turn-off Time t
OFF
I
F
=5 mA
I
L
=50 mA
Min — — — — ms
Typ 1.0 0.6 0.6 0.1 ms
Max 3.0 2.5 2.5 0.5 ms
Electrical Characteristics T
A
=25
°
C
SSR Characteristics
Minimum and maximum values are testing require-
ments. 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.
LH1528A, LH1529A, LH1529B, LH1549
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6H–6
Electrical Characteristics (cont’d)
T
A
=25
°
C Optocoupler Characteristics
Minimum and maximum values are testing require-
ments. 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.
Parameter Symbol Test
Conditions Values LH1528A LH1529A LH1529B LH1549H Units
I
N
P
U
T
LED Forward
Voltage V
F
I
F
=10 mA
Min 0.9 0.9 0.9 0.9 V
Typ 1.2 1.2 1.2 1.2 V
Max 1.5 1.5 1.5 1.5 V
O
U
T
P
U
T
Saturation
Voltage V
CE
(Sat) I
F
=16 mA,
I
C
=2 mA
Min — — — — V
Typ 0.7 0.7 0.7 0.7 V
Max 0.5 0.5 0.5 0.5 V
Leakage Current I
CEO
I
F
=0 mA,
V
CE
=5 V
Min — — — — nA
Typ — — — — nA
Max 500 500 500 500 nA
Trickle Current
Leakage I
CEO
I
F
=5
µ
A,
V
CE
=5 V
Min — — — —
µ
A
Typ — — — —
µ
A
Max 1 1 1 1
µ
A
T
R
A
N
S
F
E
R
dc Current Transfer
Ratio CTR I
F
=6 mA,
V
CE
=0.5 V
Min 33 33 100 33 %
Typ 165 165 165 165 %
Max — — — — %
LH1528A, LH1529A, LH1529B, LH1549
6H1.11SSR telcmSw copy Page 6 Monday, June 2, 1997 12:04 PM
6H–7
SSR Characteristics
A. LED Voltage vs. Temperature
C. Current Limit vs. Temperature
E. Switch Capacitance vs. Applied Voltage (LH1529)
AMBIENT TEMPERATURE (°C)
–40 –20 0
LED FORWARD VOLTAGE (V)
1.6
1.5
1.4
1.0 20
1.3
6040
1.2
1.1
80
IF = 1 mA
IF = 2 mA
IF = 10 mA
IF = 20 mA IF = 50 mA
IF = 5 mA
–40
CHANGE IN CURRENT LIMIT (%)
NORMALIZED TO 25 °C
40
10
30
20
0
–20
–10
–40
–30
–20 0 20 40 60
AMBIENT TEMPERATURE (°C)
80
IF = 5 mA
t = 5 ms
VL
= SEE ELEC. CHAR.
0
CAPACITANCE (pF)
80
60
50
0
40
30
20
10
70
20 40
APPLIED VOLTAGE (V)
60 10080
LH1529
I
F
= 0 mA
T
A
= 25 °C
f = 1 MHz
B. LED Current for Switch Turn-OnOff vs. Temperature
D. ON-Resistance vs. Temperature
F. Switch Capacitance vs. Applied Voltage (LH1528)
AMBIENT TEMPERATURE (°C)
100
–60
LED FORWARD CURRENT FOR SWITCH
TURN-ON (%) NORMALIZED TO 25 °C
80
60
40
–40
–40
20
–20
0
–20 0 20 40 60 80
I
L
= 100 mA
–40
CHANGE IN ON-RESISTANCE (%)
NORMALIZED TO 25°C
50
10
30
20
40
–20
–30
–10
–40
0
B
–20 0 20 40 60 80
AMBIENT TEMPERATURE (°C)
B
A
I
L
= 50 mA
A
A — LH1529
B — LH1528
0 20 40
APPLIED VOLTAGE (V)
CAPACITANCE (pF)
80
50
70
60
40
20
0
10
60
30
10080
LH1528
I
F
= 5 mA
T
A
= 25 °C
f = 1 MHz
LH1528A, LH1529A, LH1529B, LH1549
6H1.11SSR telcmSw copy Page 7 Monday, June 2, 1997 12:04 PM
6H–8
SSR Characteristics (LH1549 not included)
(continued)
A. Insertion Loss vs. Frequency
C. Output Isolation (LH1528)
E. Leakage Current vs. Applied Voltage at Elevated
Temperatures (LH1529)
FREQUENCY (Hz)
0.30
0
INSERTION LOSS (dB)
0.25
0.20
0.10
0.05
10
2
10
3
10
4
10
5
0.15
R
L
= 600 Ω
FREQUENCY (Hz)
100
ISOLATION (dB)
80
60
40
20
0
I
F
= 10 mA
V
P
= 10 V
R
L
= 50 Ω
10
2
10
3
10
4
10
5
10
6
10
7
LH1528
LOAD VOLTAGE (V)
3.0
OFF-STATE LEAKAGE CURRENT (nA)
2.5
2.0
1.0
0.5
1.5
00 50 100 150 200 250 300 350 400
85 °C
70 °C
50 °C
B. Output Isolation (LH1529)
D. Leakage Current vs. Applied Voltage (LH1529)
F. Leakage Current vs. Applied Voltage (LH1528)
FREQUENCY (Hz)
100
ISOLATION (dB)
80
60
40
20
0
V
P
= 10 V
R
L
= 50 Ω
102103104105106107
LH1529
90
0 50 100 150 200 250 300
LOAD VOLTAGE (V)
OFF-STATE LEAKAGE CURRENT (pA)
100
70
80
60
40
30
50
20
10
0350 40
0
I
F
= 0 mA
T
A
= 25 °C
LH1529
0 50 100 150 200 250
LOAD VOLTAGE (V)
OFF-STATE LEAKAGE CURRENT (nA)
400
280
360
320
240
80
120
0
40
300
200
160
350
I
F
= 20 mA
I
F
= 10 mA
I
F
= 5 mA
I
F
= 2 mA
LH1528A, LH1529A, LH1529B, LH1549
6H1.11SSR telcmSw copy Page 8 Monday, June 2, 1997 12:04 PM
6H–9
SSR Characteristics (LH1549 not included)
(continued)
A. Leakage Current vs. Applied Voltage at 50
°
C (LH1528)
C. Leakage Current vs. Applied Voltage at 85
°C (LH1528)
E. Turn-On Time vs. Temperature (LH1529)
0 50 100 150 200 250
LOAD VOLTAGE (V)
OFF-STATE LEAKAGE CURRENT (nA)
400
280
360
320
240
80
120
0
40
300
200
160
350
I
F
= 20 mA
I
F
= 10 mA
I
F
= 5 mA
I
F
= 2 mA
0 50 150 200
LOAD VOLTAGE (V)
OFF-STATE LEAKAGE CURRENT (nA)
600
500
400
300
200
100
0350 400100 250 300
I
F
= 20 mA
I
F
= 10 mA
I
F
= 5 mA
I
F
= 2 mA
700
–40 –20 0 20 40 60 80
AMBIENT TEMPERATURE (°C)
CHANGE IN TURN-ON TIME (%)
NORMALIZED TO 25 °C
60
50
–20
–30
–10
0
10
20
30
40
–40
I
F
= 5 mA
I
L
= 50 mA
LH1529
B. Leakage Current vs. Applied Voltage at 70°C (LH1528)
D. Switch Breakdown Voltage vs. Temperature
F. Turn-Off Time vs. Temperature (LH1529)
0 50 150 200
LOAD VOLTAGE (V)
700
600
500
400
300
200
100
OFF-STATE LEAKAGE CURRENT (nA)
350 40
0
100 250 300
0
IF = 20 mA
IF = 10 mA
IF = 5 mA
IF = 2 mA
–40 –20 0 20 40 60 80
AMBIENT TEMPERATURE (°C)
CHANGE IN BREAKDOWN VOLTAGE (%)
NORMALIZED TO 25 °C
8
0
4
2
6
–2
–6
–8
–4
120
40
CHANGE IN TURN-OFF TIME (%)
NORMALIZED TO 25 °C
–40
100
80
60
20
–20
–60
0
–40 –20 0 20 40 60 80
AMBIENT TEMPERATURE (°C)
–80
160
140
I
F
= 5 mA
I
L
= 50 mA
LH1529
LH1528A, LH1529A, LH1529B, LH1549
6H1.11SSR telcmSw copy Page 9 Monday, June 2, 1997 12:04 PM
6H–10
SSR Characteristics (LH1549 not included)
(continued)
A. Turn-On/Off Time vs. Temperature (LH1528)
C. Turn-On Time vs. LED Current (LH1528)
E. Turn-Off Time vs. LED Current (LH1528)
80
–40 –20 0 20 40 60 80
AMBIENT TEMPERATURE (°C)
CHANGE IN TURN-ON/OFF TIME (%)
NORMALIZED TO 25 °C
50
70
60
40
20
10
30
–10
–20
–30
–40
–50
0
90
ton I
F
= 5 mA
I
L
= 50 mA
toff
0 10 20
LED FORWARD CURRENT (mA)
TURN-ON TIME (ms)
2.5
2.0
1.5
0.5 30
1.0
5040
I
L
= 50 mA
–40 °C
25 °C
85 °C
0 10 20
LED FORWARD CURRENT (mA)
TURN-OFF TIME (ms)
10
8
6
0
2
30
4
5040
I
L
= 50 mA
25 °C
85 °C
–40 °C
B. Turn-On Time vs. LED Current (LH1529)
D. Turn-Off Time vs. LED Current (LH1529)
0 10 20
LED FORWARD CURRENT (mA)
TURN-ON TIME (ms)
10
8
6
0
2
30
4
5040
85 °C
25 °C
–40 °C
85 °C–40 °C25 °C
I
L
= 50 mA
0 10 20
TURN-OFF TIME (ms)
0.9
0.8
0.7
0.2 30
0.6
5040
0.5
0.4
0.3
LED FORWARD CURRENT (mA)
–40 °C
25 °C
85 °C
I
L
= 50 mA
LH1528A, LH1529A, LH1529B, LH1549
6H1.11SSR telcmSw copy Page 10 Monday, June 2, 1997 12:04 PM
6H–11
Optocoupler Characteristics (LH1549 not included)
A. LED Voltage vs. Temperature
C. Dark Current Leakage vs. Temperature
E. Symmetry
AMBIENT TEMPERATURE (°C)
–40 –20 0
LED FORWARD VOLTAGE (V)
1.6
1.5
1.4
1.0 20
1.3
6040
1.2
1.1
80
I
F
= 1 mA
I
F
= 2 mA
I
F
= 10 mA
I
F
= 20 mA I
F
= 50 mA
I
F
= 5 mA
0.1
1
10
100
1000
20 30 40 50 60 70 80 90
AMBIENT TEMPERATURE (
o
C)
LEAKAGE CURRENT (nA)
I
F
= 0 mA
V
CE
= 5 V
30
25
20
15
10
5
00 2 4 6 8 10
V
CE
(V)
I
C
(mA)
I
F
= 10 mA
I
F
= –10 mA
B. Transfer Characteristics
D. Trickle Leakage Current vs. Temperature
F. Current Transfer Ratio (CTR) vs. Temperature
20
18
16
14
12
10
8
6
4
2
00 1 2 3 4 5 6 7 8 9 10
COLLECTOR-EMITTER VOLTAGE, V
CE
(V)
COLLECTOR CURRENT, I
C
(mA)
I
F
= 10 mA
I
F
= 8 mA
I
F
= 6 mA
I
F
= 4 mA
I
F
= 2 mA I
F
= 0 mA
80
70
60
50
40
30
20
10
20 30 40 50 60 70 80 9
0
0
LEAKAGE CURRENT (nA)
AMBIENT TEMPERATURE (°C)
100
10
1
0.1
0.01
0.001
0.05 0.5 5 50
I
C
(
mA
)
V
CE
= 0.5 V
25 °C
45 °C
65 °C
85 °C
I
F
(mA)
LH1528A, LH1529A, LH1529B, LH1549
6H1.11SSR telcmSw copy Page 11 Monday, June 2, 1997 12:04 PM
