eroflex Circuit Technology SCDCT2100 REV B 10/1/98
Features
4 Independent 1.0 Amp Switches
600 Volts Isolation between Switches
Operates from a 5 Volt Logic and 15 Volt Bias
D.C. Trip Level 1.3 Amps
Switches are Designed to withstand Electro-Magnetic Pulse (EMP)
Functions and Operates from -55C to +125C in Military Environments
Processed and Screened to Mil-STD-883 Specifications
Block Diagram
Smart Switch
2
Smart Switch
3
Smart Switch
4
TRIP
Smart Switch
1
600 Volt
Isolation
Sense
ON/OFF
&
TRIP
2
8
4
Switch
Control
Latch
ON/OFF
and
TRIP
Switch
Status
READ
8 Bit
A
1
A
0
CS
INIT
WRITE
PRESET/CLEAR
1-4
4
4
8
S
1
+
S
1
S
2
+
S
3
+
S
4
+
S
2
S
3
S
4
DATA
0-7
The CT2100-400 is a microprocessor controlled, quad solid state relay that incorporates fully isolated switch
control and built-in test. The hybrid provides 600 Volts isolation between control inputs and switch outputs.
Internal control and status registers provide analog switch function which operates via simple I/O commands.
CIRCUIT TECHNOLOGY
www.aeroflex.com/act1.htm
QUAD SOLID STATE RELAY
MICROPROCESSOR CONTROLLED
CT2100-400
2
Aeroflex Circuit Technology
SCDCT2100 REV B 10/1/98 Plainview NY (516) 694-6700
DESCRIPTION
The CT2100-400 is a quad solid
state relay. The device has been
designed to provide an interface
which operates as a simple
computer I/O port. The switches
are controlled by a single data
word which the processor writes to
an internal control latch. In
addition to the basic switch
function ON/OFF and Trip flags
provide the operational status of
each of the four switches. These
signals are internally contained in
an 8 bit status register which is
accessible by an I/O read
command. The switches may also
be controlled asynchronously
(without write strobes) by use of
separate initialization pins. These
may also be used for Power-Up
control in a microprocessor based
system.
SWITCH CONTROL
The CT2100-400 has four
independent fully isolated
switches which may be used as
high side or low side drivers. The
isolated design allows the user
to parallel devices or place them
in series as required for the
specific application. Control of
the switch is via I/O write
(Address 0) or asynchronous
control lines. The CT2100-400
has an internal switch control
latch which is updated via
subsystem I/O write as
illustrated in Figure 2. Once the
I/O write is completed the switch
is latched into the OFF or ON
state. The switch may also be
controlled via individual
PRESET and CLEAR lines.
These lines asynchronously
drive the switch control latch
without the need for a write
strobe. The PRESET/CLEAR
inputs are enabled by the
initialize pin.
SWITCH STATUS
Each switch in the CT2100-400
is monitored for circuit Trip and
ON/OFF. This data is contained
in a 8 bit status register which is
accessible via an I/O read
(Address 0) command. The
timing for the I/O read is shown
in Figure 1. The Trip and
ON/OFF flags are provided to
the system to assess the
operational capability of the
switch versus the status of the
controlled load. The Trip bit is
set high when the switch has
conducted between 1.1 to 3
amps of current based on the
time to trip curve in Figure 3.
The over current DC trip point is
typically 1.3 amps.
Table 1 -- Absolute Maximum Ratings
Supply Voltage (V
CC
) -- Pin 20
-0.5 to +7.0 Volts DC
Supply Voltage (V
EE
) -- Pin 1
-.5 to +18 Volts DC
Logic Input Voltage -- Pins 2-9, 12-19
-0.5 to V
CC
+.5 Volts DC
Switch Point Voltage -- Pins 39-40, 29-32, 21-22
-600 to +600 Volts (200 ns)
80 Volts DC
Storage Temperature Range
-65C to +150 C
Table 2 -- Recommended Operating Conditions
Supply Voltage (V
CC
) -- Pin 20
+5.0 VDC 10%
Supply Voltage (V
EE
) -- Pin 1
+14.25 to +15.75 VDC
Logic Input Maximum Voltage (High) -- Pins 2-9, 12-19
+3.3 V
Logic Input Minimum Voltage (Low) -- Pins 2-9, 12-19
+0.8 V
Switch Point Voltage -- Pins 39-40, 29-32, 21-22
60 VDC
Operating Temperature Range
-55C to +125 C
3
Aeroflex Circuit Technology
SCDCT2100 REV B 10/1/98 Plainview NY (516) 694-6700
Table 3 -- Timing Characteristics
READ Cycle
WRITE Cycle
Parameter
Sym
Min
Max
Units
Parameter
Sym
Min
Max
Units
Pulse Width
T
PW
100
-
nsec
Pulse Width
T
PW
100
-
nsec
Data Delay
T
D
-
50
nsec
Set-up Time
T
S
25
-
nsec
Hold Time
T
D
10
-
nsec
Hold Time
T
H
10
-
nsec
DATA
SWITCH
CONTROL
WRITE/ CS
VALID
Figure 1
Tpw
Tsu
Th
STATUS
DATA
READ/ CS
VALID
Figure 2
Tpw
Td
Th
Timing Waveforms
Table 4 -- Switch Data
Parameter
Sym
Min
Max
Units
DC Continous Rated Current
I
C
-
1
Amps
DC Trip Current
(For Time to Trip Refer to Figure 3)
I
OT
1.1
1.5
Amps
On Resistance
R
ON
-
0.6
Ohms
Output Leakage Current at 80 VDC
I
L
-
40
A
Switch Turn-on Time
T
SD
-
2
msec
Isolation
V
ISO
600
-
Volts
4
Aeroflex Circuit Technology
SCDCT2100 REV B 10/1/98 Plainview NY (516) 694-6700
Table 5 -- Bus Bit Definition
ADDRESS = 0
BIT
WRITE CYCLE
READ CYCLE
D0
S1 ON/OFF 0 = ON
S1 ON/OFF status (Bit = 0)(When switch on)
D1
Not Used
S1 TRIP status (Bit = 1)(When short circuit protection active))
D2
S2 ON/OFF 0 = ON
S2 ON/OFF Status
D3
Not Used
S2 TRIP Status
D4
S3 ON/OFF 0 = ON
S3 ON/OFF Status
D5
Not Used
S3 TRIP Status
D6
S4 ON/OFF 0 = ON
S4 ON/OFF Status
D7
Not Used
S4 TRIP Status
ADDRESS = 1 (Wrap Around)
D0 D7
Bit = 1 or 0
Whatever was written in the write cycle will be read
ADDRESS = 2
D0
X \1
0 = Command On (Signal being sent from the control side to Isolation Driver)
D1
X
Not Used
D2
X
0 = Command On (Signal being sent from the control side to Isolation Driver)
D3
X
Not Used
D4
X
0 = Command On (Signal being sent from the control side to Isolation Driver)
D5
X
Not Used
D6
X
0 = Command On (Signal being sent from the control side to Isolation Driver)
D7
X
Not Used
\1 X = Don't care. During a write cycle (Address 2) it shall be considered as if the INIT is enabled.
Table 6 --Built-in Test Status (BIT)
Switch Control
(Closed/OPEN)
TRIP Status
ON/OFF Status
Conclusion
1
0
1
Normal (OFF)
0
0
0
Normal (ON)
0
1
1
Switch Tripped off due to excessive load current
Note: All other TRIP and ON/OFF status combinations are indicative of switch, BIT or load failures
5
Aeroflex Circuit Technology
SCDCT2100 REV B 10/1/98 Plainview NY (516) 694-6700
Table 7A Pin Numbers & Functions
CT2100-400
Pin #
Function
Pin #
Function
1
V
EE
21
S4-
2
CS
22
S4+
3
INIT
23
NC
4
DB0
24
NC
5
DB1
25
NC
6
PRESET/CLEAR 1
26
A1
7
PRESET/CLEAR 2
27
A0
8
DB2
28
NC
9
DB3
29
S3-
10
V
EE
RETURN
30
S3+
11
V
CC
RETURN
31
S2-
12
DB4
32
S2+
13
DB5
33
NC
14
PRESET/CLEAR 3
34
NC
15
PRESET/CLEAR 4
35
NC
16
DB6
36
NC
17
DB7
37
NC
18
WRITE
38
NC
19
READ
39
S1-
20
V
CC
40
S1+
Table 7B -- Model CT2100-400 Dual In Line Package
.016
.100
TYP
40
20
TOP VIEW
2.140
.010
.020
1
21
1.900
.005
.900
.010
1.140
.010
.120
.010
.120
.010
.180
.010
Pin numbers are
for reference only
.300
MAX
6
Aeroflex Circuit Technology
SCDCT2100 REV B 10/1/98 Plainview NY (516) 694-6700
Specifications subject to change without notice.
Figure 3 -- Nominal Time to Trip Curve
3400
3200
3000
2800
2600
2400
2200
2000
1800
1600
1400
1200
1000
800
600
1
10
100
1000
Time (ms
)
No Trip Region
Trip Region
1.1 Amps
Trip Envelope Range
C I R C U I T T E C H N O L O G Y
Ordering Information
Model No.
CT2100-400
Aeroflex Circuit Technology
35 South Service Road
Plainview New York 11830
FAX: (516) 694-6715
Toll Free Inquiries: 1-(800) 843-1553
Telephone: (516) 694-6700
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