CT2100-400 Datasheet, PDF (2/6 Pages) Aeroflex Circuit Technology – CT2100-400 MICROPROCESSOR CONTROLLED QUAD SOLID STATE RELAY

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
Supply Voltage (V_EE) — Pin 1
Logic Input Voltage — Pins 2-9, 12-19
Switch Point Voltage — Pins 39-40, 29-32, 21-22
Storage Temperature Range
-0.5 to +7.0 Volts DC
-.5 to +18 Volts DC
-0.5 to V_CC +.5 Volts DC
-600 to +600 Volts (200 ns)
80 Volts DC
-65°C to +150 °C
Table 2 — Recommended Operating Conditions
Supply Voltage (V_CC) — Pin 20
Supply Voltage (V_EE) — Pin 1
Logic Input Maximum Voltage (High) — Pins 2-9, 12-19
Logic Input Minimum Voltage (Low) — Pins 2-9, 12-19
Switch Point Voltage — Pins 39-40, 29-32, 21-22
Operating Temperature Range
+5.0 VDC ±10%
+14.25 to +15.75 VDC
+3.3 V
+0.8 V
60 VDC
-55°C to +125 °C
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