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Cypress Semiconductor Electronic Components Datasheet



CY14V256LA

256-Kbit (32 K x 8) nvSRAM



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CY14V256LA pdf
CY14V256LA
256-Kbit (32 K × 8) nvSRAM
256-Kbit (32 K × 8) nvSRAM
Features
35 ns access time
Internally organized as 32 K × 8
Hands off automatic STORE on power down with only a small
capacitor
STORE to QuantumTrap nonvolatile elements initiated by
software, device pin, or AutoStore on power down
RECALL to SRAM initiated by software or power up
Infinite read, write, and recall cycles
1 million STORE cycles to QuantumTrap
20 year data retention
Core VCC = 3.0 V to 3.6 V; I/O VCCQ = 1.65 V to 1.95 V
Industrial temperature
48-ball fine-pitch ball grid array (FBGA) package
Pb-free and restriction of hazardous substances (RoHS)
compliance
Functional Description
The Cypress CY14V256LA is a fast static RAM, with a
nonvolatile element in each memory cell. The memory is
organized as 32 K bytes of 8 bits each. The embedded
nonvolatile elements incorporate QuantumTrap technology,
producing the world’s most reliable nonvolatile memory. The
SRAM provides infinite read and write cycles, while independent
nonvolatile data resides in the highly reliable QuantumTrap cell.
Data transfers from the SRAM to the nonvolatile elements (the
STORE operation) takes place automatically at power down. On
power-up, data is restored to the SRAM (the RECALL operation)
from the nonvolatile memory. Both the STORE and RECALL
operations are also available under software control.
For a complete list of related documentation, click here.
LogLiocgBicloBclkocDkiaDgiraagmram
A5
A6
A7
A8
A9
A 11
A 12
A 13
A 14
Quantum Trap
512 X 512
STORE
STATIC RAM
ARRAY
512 X 512
RECALL
DQ 0
DQ 1
DQ 2
DQ 3
DQ 4
DQ 5
DQ 6
DQ 7
COLUMN I/O
COLUMN DEC
A0 A1 A2 A3 A4 A10
VCC VCCQ VCAP
POWER
CONTROL
STORE/
RECALL
CONTROL
HSB
SOFTWARE
DETECT
-A14 A2
OE
CE
WE
Cypress Semiconductor Corporation • 198 Champion Court
Document Number: 001-76295 Rev. *D
• San Jose, CA 95134-1709 • 408-943-2600
Revised March 20, 2015



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CY14V256LA pdf
CY14V256LA
Contents
Pinout ................................................................................ 3
Pin Definitions .................................................................. 3
Device Operation .............................................................. 4
SRAM Read ................................................................ 4
SRAM Write................................................................. 4
AutoStore Operation.................................................... 4
Hardware STORE Operation....................................... 4
Hardware RECALL (Power-Up) .................................. 5
Software STORE......................................................... 5
Software RECALL ....................................................... 5
Preventing AutoStore .................................................. 6
Data Protection............................................................ 6
Maximum Ratings............................................................. 7
Operating Range............................................................... 7
DC Electrical Characteristics .......................................... 7
Data Retention and Endurance ....................................... 8
Capacitance ...................................................................... 8
Thermal Resistance.......................................................... 8
AC Test Loads .................................................................. 9
AC Test Conditions .......................................................... 9
AC Switching Characteristics ....................................... 10
SRAM Read Cycle .................................................... 10
SRAM Write Cycle..................................................... 10
Switching Waveforms .................................................... 11
AutoStore/Power-up RECALL ....................................... 13
Switching Waveforms .................................................... 14
Software Controlled STORE/RECALL Cycle................ 15
Switching Waveforms .................................................... 15
Hardware STORE Cycle ................................................. 16
Switching Waveforms .................................................... 16
Truth Table For SRAM Operations................................ 17
Ordering Information...................................................... 18
Ordering Code Definitions ......................................... 18
Package Diagrams.......................................................... 19
Acronyms ........................................................................ 20
Document Conventions ................................................. 20
Units of Measure ....................................................... 20
Document History Page ................................................. 21
Sales, Solutions, and Legal Information ...................... 22
Worldwide Sales and Design Support....................... 22
Products .................................................................... 22
PSoC Solutions ......................................................... 22
Document Number: 001-76295 Rev. *D
Page 2 of 22



Part Number CY14V256LA
Description 256-Kbit (32 K x 8) nvSRAM
Maker Cypress Semiconductor - Cypress Semiconductor
Total Page 22 Pages
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