CY14B256LA-ZS25XIT Cypress Semiconductor Corp, CY14B256LA-ZS25XIT Datasheet - Page 4

• Manufacturer Part Number: CY14B256LA-ZS25XIT
• Description: CY14B256LA-ZS25XIT
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY14B256LA-ZS25XIT

• Format - Memory: RAM
• Memory Type: NVSRAM (Non-Volatile SRAM)
• Memory Size: 256K (32K x 8)
• Speed: 25ns
• Interface: Parallel
• Voltage - Supply: 2.7 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TSOP (0.400", 10.16mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AutoStore Inhibit
The STK14C88-3 has the AutoStore Inhibit feature and the
CY14B256LA has AutoStore Disable mode. These two
provide the same result of AutoStore disable but are done
by different means – hardware in STK14C88-3 and software
in CY14B256LA.
To disable AutoStore in STK14C88-3, the power is
connected to the V
left open). This cannot be done in CY14B256LA. For proper
operation of the device, in CY14B256LA, power is
connected to the V
is more easily done through simple software sequence.
Therefore, if the STK14C88-3 is replaced in an application
where AutoStore has been disabled, then the layout has to
be modified to connect the power to the V
software sequence has to be used to disable AutoStore
function followed by a Software STORE, the first time the
board is powered up.
October 5, 2009
CC
CAP
pin only. However, AutoStore disable
pin and the V
CC
pin is grounded (or
CC
Document No. 001-55662 Rev. **
pin and a
STORE Cycles
The NV STORE cycles endurance in CY14B256LA is lower
than the endurance in the older 0.8u technology. However,
this would not affect most applications since all nvSRAMs
have infinite read/write endurance and the NV STORE cycle
happens only during power down or during Software
STORE. For example, if a system is powered down 10 times
a day, then the NV STORE endurance is reached in
54 years in CY14B256LA.
Data Retention
The Data Retention in 0.13u part is vastly improved from the
older technology part. The CY14B256LA has a data
retention of 20 years at 85°C against the STK14C88-3 data
retention of 100 years at 55°C. This translates to over
4 times improvement in data retention at the same
temperatures.
AN55662
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