Details

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BUY DS1233-10 https://www.utsource.net/itm/p/12591875.html

Parameter	Description	Value
Device Type	Dual 16-Bit Nonvolatile Static RAM with Battery Backup	-
Data Retention Time	Data retention without power (battery-backed)	10 years
Operating Voltage	VCC Supply Voltage	4.5V to 5.5V
Battery Voltage	Battery Backup Voltage	2.7V to 3.6V
Memory Size	Total Memory Size	32 kbits (2 x 16 kbits)
Organization	Memory Organization	2 x 16 x 8
Access Time	Maximum Access Time	70 ns
Standby Current	Supply Current in Standby Mode	10 μA (max)
Active Current	Supply Current in Active Mode	20 mA (max)
Write Cycle Time	Maximum Write Cycle Time	100 μs
Operating Temperature	Operating Temperature Range	-40°C to +85°C
Package	Package Type	SOIC-16

Instructions for Use

1. Power Supply Connection:

   • Connect the VCC pin to a 4.5V to 5.5V power supply.
   • Connect the battery backup pin (Vbat) to a 2.7V to 3.6V battery.

2. Address and Data Lines:

   • Connect the address lines (A0-A15) to the desired memory locations.
   • Connect the data lines (D0-D7) to the data bus.

3. Control Signals:

   • Chip Select (CS): Low to enable the device.
   • Write Enable (WE): Low to write data to the selected memory location.
   • Output Enable (OE): Low to read data from the selected memory location.

4. Write Operation:

   • Set CS and WE low.
   • Apply the desired address to the address lines.
   • Apply the data to be written to the data lines.
   • Wait for the write cycle time (100 μs) before setting WE high.

5. Read Operation:

   • Set CS and OE low.
   • Apply the desired address to the address lines.
   • Data will be available on the data lines after the access time (70 ns).

6. Battery Backup:

   • Ensure the battery is connected to maintain data retention during power loss.
   • The device will automatically switch to battery power when VCC falls below the threshold.

7. Storage and Handling:

   • Store the device in a dry environment to prevent moisture damage.
   • Handle with care to avoid static discharge which can damage the device.

8. End of Life:

   • When the battery reaches its end of life (data retention less than 10 years), replace the battery or the entire module if necessary.

(For reference only)