ASSR-1218 , ASSR-1219 and ASSR-1228
Form A, Solid State Relay (Photo MOSFET)
(60V/0.2A/10Ω)
Data Sheet
Description
The ASSR-12XX Series consists of an AlGaAs infrared
light-emitting diode (LED) input stage optically coupled
to a high-voltage output detector circuit. The detector
consists of a high-speed photovoltaic diode array and
driver circuitry to switch on/o two discrete high volt-
age MOSFETs. The relay turns on (contact closes) with a
minimum input current of 3mA through the input LED.
The relay turns o (contact opens) with an input volt-
age of 0.8V or less.
The single channel configurations, ASSR-1218 and
ASSR-1219, are equivalent to 1 Form A Electromechani-
cal Relays (EMR), and the dual channel conguration,
ASSR-1228, is equivalent to 2 Form A EMR. They are
available in 4-pin SO, 6-pin DIP, 8-pin DIP and Gull Wing
Surface Mount for DIP packages. ASSR-1219 enables
AC/DC and DC-only output connections. For DC-only
connection, the output current, Io, increases to 0.4A
and the on-resistance, R(ON) reduces to 2.5Ω.
Functional Diagram
Features
• Compact Solid-State Bi-directional Signal Switch
• Single and Dual Channel Normally-o Single-Pole-
Single-Throw (SPST) Relay
• 60V Output Withstand Voltage
• 0.2A or 0.4A Current Rating
(See Schematic for ASSR-1219 Connection A and B)
• Low Input Current: CMOS Compatibility
• Low On-Resistance: 0.25Ω Typical for DC-only,
1Ω Typical for AC/DC
• High Input-to-Output Insulation Voltage
(Safety and Regulatory Approved)
- 3750 Vrms for 1 min per UL1577
- CSA Component Acceptance
Applications
• Telecommunication Switching
• Data Communications
• Industrial Controls
• Medical
• Security
• EMR / Reed Relay Replacement
Truth Table
Opto-isolation
Turn-off
Circuit
1
2
4
3
Single Channel, SPST Relay,
1 Form A in 4-Pin SO Package
CloseOn
OpenOff
OutputLED
CAUTION: It is advised that normal static precautions be taken in handling and assembly
of this component to prevent damage and/or degradation which may be induced by ESD.
