CY14B101K
1 Mbit (128K x 8) nvSRAM With Real Time Clock
Features
Functional Description
■ Data integrity of Cypress nvSRAM combined with full featured
Real Time Clock (RTC)
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.
■ Watchdog timer
■ Clock alarm with programmable interrupts
■ Capacitor or battery backup for RTC
■ 25 ns, 35 ns, and 45 ns access times
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.
■ 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 ICC at 200 ns cycle time
■ Single 3V operation +20%, –10%
■ Commercial and industrial temperature
■ SSOP package (ROHS compliant)
Logic Block Diagram
V
CC
V
CAP
QuantumTrap
1024 x 1024
V
RTCbat
A5
POWER
STORE
CONTROL
V
RTCcap
A6
A7
A8
RECALL
STORE/
RECALL
CONTROL
STATIC RAM
ARRAY
1024 X 1024
A9
HSB
A12
A13
A14
A15
A16
SOFTWARE
DETECT
A15
A0
-
DQ0
COLUMN IO
DQ1
DQ2
DQ3
COLUMN DEC
x1
x2
RTC
MUX
INT
DQ4
DQ5
DQ6
DQ7
A0
A4
A11
A10
A1
A3
A2
A16
A0
-
OE
CE
WE
Cypress Semiconductor Corporation
Document Number: 001-06401 Rev. *G
•
198 Champion Court
•
San Jose, CA 95134-1709
•
408-943-2600
Revised Nov 06, 2007
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