900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf




Cypress Semiconductor Electronic Components Datasheet

CY14B256KA Datasheet

256 Kbit (32K x 8) nvSRAM

No Preview Available !

CY14B256KA
256-Kbit (32 K × 8) nvSRAM with
Real Time Clock
Features256-Kbit (32 K × 8) nvSRAM with Real Time Clock
256-Kbit nonvolatile static random access memory (nvSRAM)
25 ns and 45 ns access times
Internally organized as 32 K × 8 (CY14B256KA)
Hands off automatic STORE on power-down with only a small
capacitor
STORE to QuantumTrap nonvolatile elements is initiated by
software, hardware, or AutoStore on power-down
RECALL to SRAM initiated on power-up or by software
High reliability
Infinite Read, Write, and RECALL cycles
1 million STORE cycles to QuantumTrap
20 year data retention
Real time clock (RTC)
Full-featured real time clock
Watchdog timer
Clock alarm with programmable interrupts
Capacitor or battery backup for RTC
Backup current of 0.35 µA (Typ)
Industry standard configurations
Single 3 V +20%, –10% operation
Industrial temperature
48-pin shrink small-outline package (SSOP)
Pb-free and Restriction of hazardous substances (RoHS)
compliant
Functional Description
The Cypress CY14B256KA combines a 256-Kbit nonvolatile
static RAM with a full featured real time clock in a monolithic
integrated circuit. The embedded nonvolatile elements
incorporate QuantumTrap technology producing the world’s
most reliable nonvolatile memory. The SRAM is read and written
an infinite number of times, while independent nonvolatile data
resides in the nonvolatile elements.
The real time clock function provides an accurate clock with leap
year tracking and a programmable, high accuracy oscillator. The
alarm function is programmable for periodic minutes, hours,
days, or months alarms. There is also a programmable watchdog
timer for process control.
For a complete list of related documentation, click here.
LLooggicicBBlolcokcDkiaDgiraagmram
A5
A6
A7
A8
A9
A 11
A 12
A 13
A 14
DQ 0
DQ 1
DQ 2
DQ 3
DQ 4
DQ 5
DQ 6
DQ 7
QuantumTrap
512 X 512
STORE
STATIC RAM
ARRAY
512 X 512
RECALL
COLUMN IO
COLUMN DEC
A0 A1 A2 A3 A4 A10
VCC
VCAP
POWER
CONTROL
STORE/
RECALL
CONTROL
VRTCbat
VRTCcap
HSB
SOFTWARE
DETECT
-A14 A0
RTC
MUX
xout
xin
INT
-A14 A0
OE
CE
WE
Cypress Semiconductor Corporation • 198 Champion Court
Document Number: 001-55720 Rev. *I
• San Jose, CA 95134-1709 • 408-943-2600
Revised November 14, 2014


Cypress Semiconductor Electronic Components Datasheet

CY14B256KA Datasheet

256 Kbit (32K x 8) nvSRAM

No Preview Available !

CY14B256KA
Contents
Pinouts .............................................................................. 3
Pin Definitions .................................................................. 3
Device Operation .............................................................. 4
SRAM Read ................................................................ 4
SRAM Write ................................................................. 4
AutoStore Operation .................................................... 4
Hardware STORE (HSB) Operation ............................ 4
Hardware RECALL (Power-Up) .................................. 5
Software STORE ......................................................... 5
Software RECALL ....................................................... 5
Preventing AutoStore .................................................. 6
Data Protection ............................................................ 6
Real Time Clock Operation .............................................. 7
nvTIME Operation ....................................................... 7
Clock Operations ......................................................... 7
Reading the Clock ....................................................... 7
Setting the Clock ......................................................... 7
Backup Power ............................................................. 7
Stopping and Starting the Oscillator ............................ 7
Calibrating the Clock ................................................... 8
Alarm ........................................................................... 8
Watchdog Timer .......................................................... 8
Power Monitor ............................................................. 9
Interrupts ..................................................................... 9
Interrupt Register ......................................................... 9
Flags Register ............................................................. 9
RTC External Components ....................................... 10
PCB Design Considerations for RTC ............................ 11
Layout requirements .................................................. 11
Maximum Ratings ........................................................... 16
Operating Range ............................................................. 16
DC Electrical Characteristics ........................................ 16
Data Retention and Endurance ..................................... 17
Capacitance .................................................................... 17
Thermal Resistance ........................................................ 17
AC Test Loads ................................................................ 18
AC Test Conditions ........................................................ 18
RTC Characteristics ....................................................... 18
AC Switching Characteristics ....................................... 19
SRAM Read Cycle .................................................... 19
SRAM Write Cycle ..................................................... 19
AutoStore/Power-Up RECALL ....................................... 21
Switching Waveforms .................................................... 21
Software Controlled STORE/RECALL Cycle ................ 22
Switching Waveforms .................................................... 22
Hardware STORE Cycle ................................................. 23
Switching Waveforms .................................................... 23
Truth Table For SRAM Operations ................................ 24
Ordering Information ...................................................... 24
Ordering Code Definitions ......................................... 24
Package Diagram ............................................................ 25
Acronyms ........................................................................ 26
Document Conventions ................................................. 26
Units of Measure ....................................................... 26
Document History Page ................................................. 27
Sales, Solutions, and Legal Information ...................... 28
Worldwide Sales and Design Support ....................... 28
Products .................................................................... 28
PSoC® Solutions ...................................................... 28
Cypress Developer Community ................................. 28
Technical Support ..................................................... 28
Document Number: 001-55720 Rev. *I
Page 2 of 28


Part Number CY14B256KA
Description 256 Kbit (32K x 8) nvSRAM
Maker Cypress Semiconductor
Total Page 28 Pages
PDF Download

CY14B256KA Datasheet PDF

View PDF for Mobile








Similar Datasheet

1 CY14B256K 256-Kbit (32K x 8) nvSRAM
Cypress Semiconductor
2 CY14B256KA 256 Kbit (32K x 8) nvSRAM
Cypress Semiconductor





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy