TIP255
TIP255 2MB SRAM with Battery Backup
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TIP255 2 MB SRAM with Battery Backup
The TIP255 is an IndustryPack compatible module that offers an easy and reliable way to implement 2 Mbytes of SRAM memory with battery backup. The TIP255 is ideal for holding configuration parameter and data logging applications. Four 512Kbit x eight low power SRAM devices are used to provide 2 banks of 1 Mbyte (16 bit wide) SRAM memory. A non-volatile controller together with the on board lithium battery converts the SRAM into non-volatile memory. The battery status can be monitored by the control and status register. Additionally an interrupt can be generated on battery low. Accesses to the TIP255 SRAM memory occur within the IP memory space. The IP I/O space holds the control and status register and the interrupt vector register. Technical Specifications
| Logic Interface |
IndustryPack® Logic Interface |
| Size |
Single Size IP |
| I/O Interface |
No connections to IP- I/O connector |
| SRAM Chip |
4 x K6T4008C1B, 70ns, TSOP package |
| SRAM Memory Capacity |
2 Mbytes SRAM Memory, 2 banks of 1 Mbyte (16 bit wide) |
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Controller |
Non-volatile controller converts SRAM into non-volatile memory |
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Battery |
On board battery holder with lithium battery (type CR2430, 285mAh capacity) |
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Battery Life time (caused by self discharging effects) |
Approx. 8 years @ +25°C, approx. 4 years @ +45°C |
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Battery Fault Voltage |
2.6V typical |
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Battery Current in Backup Mode |
4µA typical @+25°C |
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Interrupt |
IntReq0 on battery low |
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Minimum Data Retention Voltage |
2.0V |
| 5V Power Failure Threshold |
Typical 4.37V |
| Wait States |
No wait states |
| Power requirements |
65mA typcial @ +5V DC |
| Temperature Range |
Operating 0°C to +70°C |
Manuals
 TIP255 |
Data Sheet |
| TIP255-DOC |
User Documentation for TIP255 |
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The New XycomVME Group
