CY14B101K_0711 Datasheet, PDF (1/24 Pages) Cypress Semiconductor – 1 Mbit (128K x 8) nvSRAM With Real Time Clock

CY14B101K
1 Mbit (128K x 8) nvSRAM With Real Time Clock
Features
■ Data integrity of Cypress nvSRAM combined with full featured
Real Time Clock (RTC)
■ Watchdog timer
■ Clock alarm with programmable interrupts
■ Capacitor or battery backup for RTC
■ 25 ns, 35 ns, and 45 ns access times
■ Hands off automatic STORE on power down with only a small
capacitor
■ STORE to QuantumTrap™ initiated by software, device pin, or
on power down
■ RECALL to SRAM initiated by software or on power up
■ Infinite READ, WRITE, and RECALL cycles
■ High reliability
❐ Endurance to 200,000 cycles
❐ Data retention: 20 years at 55°C
■ 10 mA typical I_CC at 200 ns cycle time
■ Single 3V operation +20%, –10%
■ Commercial and industrial temperature
■ SSOP package (ROHS compliant)
Functional Description
The Cypress CY14B101K combines a 1 Mbit 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 one time alarm or
periodic seconds, minutes, hours, or days. There is also a
programmable watchdog timer for process control.
Logic Block Diagram
QuantumTrap
V_CC
V_CAP
A₅
1024 x 1024
POWER
V_RTCbat
A₆
STORE
CONTROL
V_RTCcap
A₇
A₈
A₉
A ₁₂
STATIC RAM
ARRAY
RECALL
STORE/
RECALL
CONTROL
HSB
A ₁₃
1024 X 1024
A ₁₄
A ₁₅
A ₁₆
SOFTWARE
DETECT
- A15 A₀
DQ ₀
DQ ₁
DQ ₂
DQ ₃
DQ ₄
DQ ₅
DQ ₆
DQ ₇
COLUMN IO
COLUMN DEC
A₀ A₁ A₂ A₃ A₄ A₁₀ A₁₁
RTC
MUX
x₁
x₂
INT
- A16 A₀
OE
CE
WE
Cypress Semiconductor Corporation • 198 Champion Court
Document Number: 001-06401 Rev. *G
• San Jose, CA 95134-1709 • 408-943-2600
Revised Nov 06, 2007
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