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Memory/Storage??

Memory chip integrates mixed-signal, non-volatile functions

Posted: 08 May 2007 ?? ?Print Version ?Bookmark and Share

Keywords:memory chip? mixed-signal memory? non-volatile functions?

Dallas Semiconductor, a wholly owned subsidiary of Maxim Integrated Products, has developed a memory device that integrates mixed-signal and non-volatile memory functions.

According to the company, the DS28DG02 provides typically a savings of 20 percent in PCB space and 30 percent in cost. Applications include communication, medical, consumer and industrial end equipment.

"Prior to the availability of the DS28DG02, equipment designers typically used up to four discrete ICs to implement equivalent functionality," said Scott Jones, business director for the company's mixed-signal memory products, including an EEPROM, real-time clock, port expander and CPU supervisor/monitor.

Data security
The DS28DG02 has a 2kb EEPROM array, which meets the size requirements to store system configuration, calibration, operational settings, etc., required by most applications. In addition, page boundary-programmable write-protection modes are provided to safeguard stored data.

Twelve bidirectional, user-programmable GPIO channels offer a high level of flexibility and convenience for adapting to a wide range of applications. The GPIOs can be configured as input or output, open drain or push-pull, and can be programmed through the EEPROM registers to power up in a defined state. Additionally, the GPIOs can sink up to 22mA when operating at 3.3V, which makes them suitable for LED on/off direct control.

The DS28DG02's RTC provides a BCD formatted clock/calendar with a programmable time/calendar alarm. The RTC can be powered from an external backup power source, such as a Li coin cell, in the absence of Vcc power.

Battery mobitor
The DS28DG02 is said to be the first device to provide a user-programmable supervisory function that actively monitors the health of the backup battery.

The standard device operates at 3.3V, 5 percent. Other versions are available that operate at 5-, 3-, 2.5V, and some with 5 percent and 10 percent trip point options. TheDS28DG02 is specified over the -40C to 85C industrial temperature range. Package options include 28-pin TSSOP and 36-pin, 6-by-6mm TQFN.

Pricing starts at $1.81 in (1,000-up, FOB USA). The device is already available.

- Ismini Scouras
eeProductCenter




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