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Chip adds four-line serial interface for faster communication

Posted: 04 Jun 2007     Print Version  Bookmark and Share

Keywords:real-time clock modules  serial interfaces  four-line serial interface 

RA-4565SA chip from <a href=Epson Toyocom" ALIGN="RIGHT">

Epson Toyocom Corp. has incorporated the RA-4565SA chip with support for high-speed serial interfaces to its line-up of real-time clock modules that can operate in high-temperature environments, including vehicle applications and industrial machines.

The new chip follows Epson's already available RA-8565SA device, which features I²C bus interface and offers a high temperature of up to 125°C warranty and high reliability. The RA-4565SA adds a four-line serial interface for faster communication, said Epson. This enables users to select a real-time clock module for high temperature environments that matches their interface specification.

RA-4565SA has an operating temperature range of -40°C to 125°C. It features an operating power supply voltage of 1.6 -5.5V. Its standby current consumption, when Ta = 125°C are 0.95µA (typ.)/5V and 0.80µA (typ.)/3V. When Ta = 25°C, the chip's standby current consumption is 0.60µA (typ.)/5V and 0.55µA(typ.)/3V.

RA-4565SA features a 32.768kHz crystal unit built-in on-chip. The oscillation characteristics guarantees a frequency stability of 5 ±23 x 10-6. The device's 32.768kHz output function is open drain output with output control function. The real-time clock functions as clock and calendar, automatic leap year correction, alarm interrupt and periodic timer interrupt among others.

The chip measures 10.1-by-7.4-by-3.2mm and is housed in a 14-pin SOP. Product samples will begin shipping in August.

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