CY14B256KA-SP25XIT(2009) 데이터 시트보기 (PDF) - Cypress Semiconductor
부품명
상세내역
제조사
CY14B256KA-SP25XIT Datasheet PDF : 26 Pages
| |||
CY14B256KA
256 Kbit (32K x 8) nvSRAM with
Real Time Clock
Features
■ 256 Kbit nvSRAM
❐ 25 ns and 45 ns access times
❐ Internally organized as 32K x 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
❐ Full featured Real Time Clock
❐ Watchdog timer
❐ Clock alarm with programmable interrupts
❐ Capacitor or battery backup for RTC
❐ Backup current of 0.35 uA (Typ)
■ Industry Standard Configurations
❐ Single 3V +20%, -10% operation
❐ Industrial temperature
❐ 48-pin SSOP package
❐ Pb-free and RoHS compliance
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 incor-
porate 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.
Logic Block Diagram
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 #: 001-55720 Rev. *A
• San Jose, CA 95134-1709 • 408-943-2600
Revised December 08, 2009
[+] Feedback
Share Link: 