DS1609

The DS1609 is a random access 256byte dual port memory designed to connect two asyncronous address/ data buses together with a common memory element. Both ports have unrestricted access to all 256 bytes of memory, and with modest system discipline no arbitration is required. Each port is controlled by three control signals: output enable, write enable, and port enable. The device DS1609 is packaged in plastic 24pin DIP and 24pin SOIC. Output enable access time of 50 ns is available when operating at 5 volts.

The DS1609 is designed as a random access 256byte dual port memory designed to connect two asyncronous address/data buses together with a common memory element. Both ports have unrestricted access to all 256 bytes of memory, and with modest system discipline no arbitration is required. Each port is controlled by three control signals: output enable, write enable, and port enable. The device is packaged in plastic 24pin DIP and 24-pin SOIC. Output enable access time of 50 ns is available when operating at 5 volts.

DS1609 has ten features. (1)Totally asynchronous 256-byte dual port memory. (2)Multiplexed address and data bus keeps pin count low. (3)Dual port memory cell allows random access with minimum arbitration. (4)Each port has standard independent RAM control signals. (5)Fast access time. (6)Low power CMOS design. (7)24pin DIP or 24pin SOIC surface mount package. (8)Both CMOS and TTL compatible. (9)Operating temperature of -40°C to +85°C. (10)Standby current of 100nA at 25°C makes the device ideal for battery backup or battery operate applications. Those are all the main features.

Some absolute maximum ratings of DS1609 have been concluded into several points as follow. (1)Its voltage on any pin relative to ground would be from -0.5V to 7.0V. (2)Its operating temperature range would be from -40°C to 85°C. (3)Its storage temperature range would be from -55°C to 125°C. (4)Its soldering temperature would be 260°C for 10 seconds. It should be noted that stresses above those listed in absolute maximum ratings may cause permanent damage to device.

Also some electrical characteristics of DS1609 are concluded as follow. (1)Its input impedance would be min 50Kohms. (2)Its standby current would be typ 3.0mA and max 5.0mA for Iccs1 and would be typ 50uA and max 300uA for Iccs2 and would be typ 100nA for Iccs3. (3)Its operating current would be typ 18mA and max 30mA. (4)Its logic 1 output would be min 2.4V. (5)Its logic 0 output would be max 0.4V. And so on. If you have any question or suggestion or want to know more information please contact us for details. Thank you!