TOSHIBA Photocoupler IRED & Photo IC TLP2601 TLP2601 Isolated Line Receiver Simplex / Multiplex Data Transmission Computer Peripheral Interface Microprocessor System Interface Digital Isolation for A/D, D/A Conversion Direct Replacement for HCPL 2601 Unit: mm The TOSHIBA TLP2601 a photocoupler which combines an IRED as the emitter and an integrated high gain, high speed photodetector.
The output of the detector circuit is an open collector, Schottky clamped transistor