Datasheet CT2100-400 Datasheet (ACT)

CT2100-400

MICROPROCESSOR CONTROLLED

QUAD SOLID STATE RELAY

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 -55°C to +125°C in Military Environments

• Processed and Screened to Mil-STD-883 Specifications

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

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PRESET/CLEAR1-4

WRITE

INIT

CS

A0
A

1

0-7

8 Bit

DATA

READ

Block Diagram

4

Smart Switch

4

8

Switch

Control

Latch

ON/OFF

and

TRIP
Switch
Status

4

600 Volt
Isolation

ON/OFF

2

&

8

TRIP

1

TRIP

Sense

Smart Switch

2

Smart Switch

3

S1+

1–

S

2+

S
S

2–

3+

S

3–

S

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Technology

Smart Switch

4

– SCDCT2100 REV B 10/1/98

4+

S

4–

S

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
initializepin.

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
(Address0) 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 (VCC) — Pin 20 -0.5 to +7.0 Volts DC
Supply Voltage (V
Logic Input Voltage — Pins 2-9, 12-19 -0.5 to V

Switch Point Voltage — Pins 39-40, 29-32, 21-22

Storage Temperature Range -65°C to +150 °C

Supply Voltage (VCC) — Pin 20 +5.0 VDC ±10%
Supply Voltage (V
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

) — Pin 1 -.5 to +18 Volts DC

EE

+.5 Volts DC

CC

-600 to +600 Volts (200 ns)
80 Volts DC

Table 2 — Recommended Operating Conditions

) — Pin 1 +14.25 to +15.75 VDC

EE

Operating Temperature Range -55°C to +125 °C

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Timing Waveforms

SWITCH

CONTROL

DATA

/ CS

WRITE

Parameter

Pulse Width T

Data Delay T

T

h

READ

STATUS

DATA

T

/ CS

T

Figure 2

VALID

T

su

T

pw

Figure 1

Table 3 — Timing Characteristics

READ Cycle WRITE Cycle

Sym

PW

D

Min Max Units

100 - nsec Pulse Width TPW 100 - nsec

- 50 nsec Set-up Time TS 25 - nsec

Parameter

Sym Min Max Units

d

pw

VALID

T

h

Hold Time T

Parameter

DC Continous Rated Current IC - 1 Amps
DC Trip Current

(For Time to Trip Refer to Figure 3)
On Resistance R

Output Leakage Current at 80 VDC I

Switch Turn-on Time T

Isolation V

D

10 - nsec Hold Time TH 10 - nsec

Table 4 — Switch Data

Sym Min Max Units

I

OT 1.1 1.5 Amps

ON - 0.6 Ohms

L - 40 µA

SD - 2 msec

ISO 600 - Volts

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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
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.

0 = Command On (Signal being sent from the control side to Isolation Driver)

Table 6 —Built-in Test Status (BIT)

Switch Control
(Closed/OPEN)

1 0 1 Normal (OFF)

TRIP Status ON/OFF Status Conclusion

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

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Table 7A – Pin Numbers & Functions

CT2100-400

Pin # Function Pin # Function

1 V

EE

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 S3­10 V
11 V

RETURN 30 S3+

EE

RETURN 31 S2-

CC

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
19 READ
20 V

CC

21 S4-

38 NC
39 S1­40 S1+

Table 7B — Model CT2100-400 Dual In Line Package

TOP VIEW

.120

40

±.010

21

1.140
±.010

1

2.140
±.010

1.900
±.005

5

.100

TYP

.016
.020

20

.300
MAX

.900

±.010

.120

±.010

Pin numbers are

for reference only

.180

±.010

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3400
3200
3000

CIRCUIT TECHNOLOGY

Figure 3 — Nominal Time to Trip Curve

2800
2600
2400
2200
2000
1800
1600
1400
1200

1.1 Amps

1000

800
600

Trip Envelope Range

Trip Region

No Trip Region

1 10 100 1000

Time (ms)

Ordering Information

Model No.

CT2100-400

Specifications subject to change without notice.

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