Toshiba increases density of photorelays
For space-constrained applications, Toshiba Electronics Europe offers three 4-Form-A voltage driven photorelays. According to the company, they have one of the smallest mounting areas in the industry.
The TLP3407SRA4, TLP3412SRHA4 and TLP3475SRHA4 photorelays are suitable for a range of applications including measuring instruments such as oscilloscopes and data loggers as well as burn-in equipment. They can also be used in semiconductor test equipment (probe cards and test heads for memories, SoC and large scale integration (LSI) to mount multiple relays on circuit boards while meeting space constraints.
The devices are Toshiba’s first four-circuit, 4-Form-A relays. They are housed in a newly developed S-VSON16T package measuring just 2.0 x 6.25 x 1.3mm and require a PCB mounting area of just 12.5mm2. The area is approximately 14 per cent less than the mounting area of four one-channel relays, confirms the company.
Input resistors are incorporated which enables the relays to be voltage-driven without any need for external resistors in 3.3 or 5.0V systems. This further reduces space requirements on circuit boards, allowing more photorelays to be mounted.
All devices are supplied in normally open (1-Form-A / NO) configuration with an off-state voltage of 60V and offer 300Vrms (minimum) of isolation. The TLP3412SRHA4 and TLP3475SRHA4 offer an on-state current of 250mA with a typical on-state resistance of just 1.0 Ohm; for the TLP3407SRA4, on-state current is 600mA with one state resistance of 0.2 Ohm.
Typical turn-on and turn-off times are just 220 and 50 microseconds respectively. The operating temperature range for all devices is -40 to +125 degrees C.
The three photorelays are shipping in volume now.
