Toshiba Corp. (Toshiba CorporaTIon) recently announced the launch of a high-speed optocoupler specifically designed for programmable logic controllers (PLCs) that can operate with positive and negative LED currents. The PLC can accept both leaky logic inputs that are mostly used in Japan and source logic inputs that are mostly used outside Japan. With the advancement of globalization, the bridge circuit is constantly using the upstream bit stream of the photocoupler as the PLC input interface, thereby providing support for sink and source logic. The new optocoupler is divided into two types: buffer logic "TLP2395" and reverse logic "TLP2398", which can provide support for sink and source logic by combining two LEDs in anti-parallel, thereby eliminating the need for bridge circuits . Due to the fact that a single circuit board contains multiple bridge circuits, the use of new optocouplers can help reduce circuit size, reduce power consumption and cost. The new product has an operating voltage range of 3V to 20V and supports high-temperature operation with a maximum ambient temperature of 125 ° C. The new photocoupler supports 5Mbps data transmission speed. Because of its wide operating voltage and operating temperature range, the transmission delay is guaranteed to be less than 250ns, the pulse width distortion is less than 80ns, and the transmission delay deviation is less than 130ns. These new features make the new products suitable for communication interfaces (RS232C, RS422, RS485, etc.) for industrial applications. In addition, a low input circuit drive (2.3mA) and a low operating current (3mA) are also realized, which helps to save energy. application Programmable logic controller (PLC), factory automation (FA) equipment Main specifications 1. Operating temperature range: Topr = -40 ℃ to 125 ℃ 2. Operating power supply voltage range: VCC = 3 ~ 20V 3. Input threshold current: IFHL / IFLH = 2.3mA (maximum value) 4. Working current: ICC = 3mA 5. Transmission delay: tpHL / tpLH = 250ns (maximum value) 6. Pulse width distortion: │tpHL-tpLH│ = 80ns (maximum value) 7. Transmission delay deviation: tpsk = 130ns (maximum value)
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