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STK17T88-RF25TR Arkusz danych(PDF) 1 Page - Cypress Semiconductor

Numer części STK17T88-RF25TR
Szczegółowy opis  32K x 8 AutoStore nvSRAM with Real Time Clock
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Producent  CYPRESS [Cypress Semiconductor]
Strona internetowa  http://www.cypress.com
Logo CYPRESS - Cypress Semiconductor

STK17T88-RF25TR Arkusz danych(HTML) 1 Page - Cypress Semiconductor

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STK17T88
32K x 8 AutoStore™ nvSRAM with
Real Time Clock
Cypress Semiconductor Corporation
198 Champion Court
San Jose
, CA 95134-1709
• 408-943-2600
Document Number: 001-52040 Rev. *A
Revised March 17, 2009
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 and R/W Cycle Time
Unlimited Read/Write Endurance
Automatic Nonvolatile STORE on Power Loss
Nonvolatile STORE Under Hardware or Software Control
Automatic RECALL to SRAM on Power Up
Unlimited RECALL Cycles
200K STORE Cycles
20-Year Nonvolatile Data Retention
Single 3V +20%, -10% Power Supply
Commercial and Industrial Temperatures
48-pin 300-mil SSOP Package (RoHS-Compliant)
Description
The Cypress STK17T88 combines a 256 Kb nonvolatile static
RAM (nvSRAM) with a full-featured real-time clock in a reliable,
monolithic integrated circuit.
The 256 Kb nvSRAM is a fast static RAM with a nonvolatile
Quantum Trap storage element included with each memory cell.
The SRAM provides the fast access and cycle times, ease of use
and unlimited read and write endurance of a normal SRAM. Data
transfers automatically to the nonvolatile 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 programmable for one-time alarms or periodic
minutes, hours, or days alarms. There is also a programmable
watchdog timer for processor control.
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
Logic Block Diagram
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