STK17T88 Datasheet, PDF (1/25 Pages) List of Unclassifed Manufacturers – nvTime Event Data Recorder 32K x 8 AutoStore nvSRAM With Real-Time Clock

STK17T88
nvTime^TM Event Data Recorder
32K x 8 AutoStore^TM nvSRAM
With Real-Time Clock
FEATURES
• Data Integrity of Simtek nvSRAM Combined
with Full-Featured Real-Time Clock
o Low Power, 300 nA Max, RTC current
o Capacitor or battery backup for RTC
• Watchdog Timer
• Clock Alarm with programmable Interrupts
• 25ns, 35ns and 45ns 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
Power Up
• Unlimited READ, WRITE and RECALL Cycles
• High-reliability
o Endurance to 1 Million Cycles
o Retention to 100 years at 125 ºC
• 5mA Typical I_CC at 200ns Cycle Time
• Single 3V +20%, -10% Operation
• SSOP and DIP Packages, (ROHS compliant)
DESCRIPTION
The Simtek STK17T88 combines a 256 Kbit
nonvolatile static RAM with a full-featured real-time
clock in a reliable, monolithic integrated circuit. The
embedded nonvolatile elements incorporate
Simtek’s QuantumTrap™ technology producing the
world’s most reliable nonvolatile memory. The
SRAM can be read and written an unlimited 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 pro-
grammable for one-time alarms or periodic seconds,
minutes, hours, or days. There is also a programma-
ble Watchdog Timer for process control.
BLOCK DIAGRAM
A₅
A6
A₇
A8
A₉
A₁₁
A12
A₁₃
A14
DQ₀
DQ₁
DQ₂
DQ3
DQ₄
DQ₅
DQ₆
DQ₇
Quantum Trap
512 X 512
STATIC RAM
ARRAY
512 X 512
STORE
RECALL
COLUMN I/O
COLUMN DEC
A₀ A₁ A₂ A₃ A₄ A₁₀
V_CC
V_CAP
POWER
CONTROL
STORE/
RECALL
CONTROL
V_RTCbat
V_RTCcap
HSB
SOFTWARE
DETECT
A13 – A0
RTC
MUX
X₁
X2
INT
A₁₄ – A₀
G
E
W
Figure 1. Block Diagram
April 2005
1
Document Control #ML0024 rev 1.2