CY14B108K_11 Datasheet, PDF (1/31 Pages) Cypress Semiconductor – 8 Mbit (1024 K x 8/512 K x 16) nvSRAM with Real Time Clock

CY14B108K, CY14B108M
8 Mbit (1024 K x 8/512 K x 16) nvSRAM
with Real Time Clock
Features
■ 25 ns and 45 ns access times
■ Internally organized as 1024 K × 8 (CY14B108K) or 512 K ×
16 (CY14B108M)
■ Hands off automatic STORE on power-down with only a small
capacitor
■ STORE to QuantumTrap nonvolatile elements is initiated by
software, device pin, or AutoStore on power-down
■ RECALL to SRAM initiated by software or power-up
■ High reliability
■ Infinite Read, Write, and RECALL cycles
■ 1 million STORE cycles to QuantumTrap
■ 20 year data retention
■ Single 3 V +20%, –10% operation
■ Data integrity of Cypress nonvolatile static RAM (nvSRAM)
combined with full-featured real time clock (RTC)
■ Watchdog timer
■ Clock alarm with programmable interrupts
■ Capacitor or battery backup for RTC
■ Industrial temperature
■ 44 and 54-pin thin small outline package (TSOP-II)
■ Pb-free and restriction of hazardous substances (RoHS)
compliant
Functional Description
The Cypress CY14B108K/CY14B108M combines a 8-Mbit
nonvolatile static RAM (nvSRAM) with a full featured RTC 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 infinite number of times, while independent nonvolatile
data resides in the nonvolatile elements.
The RTC 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^{[1, 2, 3]}
A₀
R
A₁
O
A₂
W
A₃
A₄
D
A₅
A₆
A₇
A₈
A₁₇
A₁₈
E
C
O
D
E
R
A 19
DQ₀
DQ₁
DQ₂
DQ₃
DQ₄
I
DQ₅
N
P
DQ₆
U
T
DQ₇
B
U
DQ₈
F
DQ₉
F
DQ₁₀
E
R
DQ₁₁
S
DQ₁₂
DQ₁₃
DQ₁₄
DQ₁₅
Quatrum
Trap
2048 X 2048 X 2
STORE
RECALL
STATIC RAM
ARRAY
2048 X 2048 X 2
VCC
VCAP
POWER
CONTROL
STORE/RECALL
CONTROL
SOFTWARE
DETECT
V_RTCbat
V_RTCcap
HSB
A₁₄ - A₂
COLUMN I/O
COLUMN DEC
A₉ A₁₀ A₁₁ A₁₂ A₁₃ A₁₄ A₁₅ A₁₆
RTC
MUX
X_out
X_in
INT
A₁₉- A₀
OE
WE
CE
BLE
BHE
Notes
1. Address A₀ - A₁₉ for x8 configuration and Address A₀ - A₁₈ for x16 configuration.
2. Data DQ₀ - DQ₇ for x8 configuration and Data DQ₀ - DQ₁₅ for x16 configuration.
3. BHE and BLE are applicable for x16 configuration only.
Cypress Semiconductor Corporation • 198 Champion Court
Document #: 001-47378 Rev. *F
• San Jose, CA 95134-1709 • 408-943-2600
Revised March 9, 2011
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