Ultra-miniature photocouplers reduce space by 70% in high-speed designs

Toshiba’s new TLP105 and TLP108 couplers offer buffer (non-inverter) logic and inverter logic functionality respectively. Maximum propagation delay time as low as 250ns gives typical switching speeds of 5MHz, while a six-pin MFSOP package results in dimensions of just 4.4mm x 3.6mm x 2.5mm.

The photocuplers are well suited to applications requiring high-speed data communications including isolated bus drivers, line receivers and microprocessor system interfaces. Both offer a minimum isolation voltage of 3750Vrms and can accommodate a wide power supply range of 4.5V to 20V. An internal Faraday shield ensures a guaranteed common mode transient immunity of ±10kV/µs.

Each of the new devices consists of a GaAlAs infrared LED optically coupled to a high-gain, high-speed photodetector. Totem-pole outputs mean that the devices can both sink and source current. Maximum input threshold current for both devices is rated at 1.6mA and performance is guaranteed at temperatures from -40ºC to 100ºC.