DESCRIPTION
The IL256AT is an AC input phototransistor optocoupler. The
device consists of two infrared emitters connected in reverse
parallel and coupled to a silicon NPN phototransistor
detector.
These circuit elements are constructed with a standard
SOIC-8 foot print.
The product is well suited for telecom applications such as
ring detection or off/on hook status, given its bidirectional
LED input and guaranteed current transfer ratio (CTR)
minimum of 20 % at IF = 10 mA.

FEATURES
• Guaranteed CTR symmetry, 2:1 maximum
• Bidirectional AC input industry standard
SOIC-8 Surface mountable package
• Isolation test voltage, 4000 VRMS
• Standard lead spacing, 0.05"
• Available only on tape and reel (conform to EIA
standard RS481A)
• Lead (Pb)-free component
• Component in accordance to RoHS 2002/95/EC and
WEEE 2002/96/EC

APPLICATIONS
• Telecom applications ring detection

AGENCY APPROVALS
• UL1577, file no. E52744 system code Y
• CUL - file no. E52744, equivalent to CSA bulletin 5A
• DIN EN 60747-5-2 (VDE 0884) available with option 1