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STK17T88-RF25ITR Scheda tecnica(PDF) 1 Page - Simtek Corporation

Il numero della parte STK17T88-RF25ITR
Spiegazioni elettronici  32K x 8 AutoStore nvSRAM
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Produttore elettronici  SIMTEK [Simtek Corporation]
Homepage  http://www.simtek.com
Logo SIMTEK - Simtek Corporation

STK17T88-RF25ITR Scheda tecnica(HTML) 1 Page - Simtek Corporation

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STK17T88
1
This product conforms to specifications per the
terms of Simtek standard warranty. The product
has completed Simtek internal qualification testing
and has reached production status.
March 2007
Document Control #ML0024 Rev 1.7
FEATURES
• nvSRAM Combined With Integrated Real-Time
Clock Functions (RTC, Watchdog Timer, Clock
Alarm, Power Monitor)
• Capacitor or Battery Backup for RTC
• 25, 45 ns Read Access & R/W Cycle Time
• Unlimited Read/Write Endurance
• Automatic Non-volatile STORE on Power Loss
• Non-Volatile STORE Under Hardware or Soft-
ware Control
• Automatic RECALL to SRAM on Power Up
• Unlimited RECALL Cycles
• 200K STORE Cycles
• 20-Year Non-volatile Data Retention
• Single 3 V + 20%, -10% Power Supply
• Commercial and Industrial Temperatures
• Small Footprint SSOP Package (RoHS-Compli-
ant)
DESCRIPTION
The Simtek STK17T88 combines a 256Kb non-vola-
tile static RAM (nvSRAM) with a full-featured real-
time clock in a reliable, monolithic integrated circuit.
The 256Kbit nvSRAM is a fast static RAM with a
non-volatile
Quantum
Trap
storage
element
included with each memory cell.
The SRAM provides the fast access & cycle times,
ease of use and unlimited read & write endurance of
a normal SRAM. Data transfers automatically to the
non-volatile storage cells when power loss is
detected (the STORE operation). On power up, data
is automatically restored to the SRAM (the RECALL
operation). Both STORE and RECALL operations
are also available under software control.
The real time clock function provides an accurate
clock with leap year tracking and a programmable,
high accuracy oscillator. The Alarm function is pro-
grammable for one-time alarms or periodic minutes,
hours, or days alarms. There is also a programma-
ble watchdog timer for processor control.
32K x 8 AutoStore nvSRAM
COLUMN DEC
G
E
W
COLUMN I/O
POWER
CONTROL
HSB
STORE/
RECALL
CONTROL
SOFTWARE
DETECT
A13 – A0
STORE
RECALL
DQ0
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
VCC
VCAP
RTC
MUX
A14 – A0
X1
X2
INT
VRTCbat
VRTCcap
A5
A6
A7
A8
A9
A11
A12
A13
A14
A0 A1 A2 A3 A4 A10
Quantum Trap
512 X 512
STATIC RAM
ARRAY
512 X 512
BLOCK DIAGRAM


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