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CPU Supervisor with 4K SPI EEPROM
Description:
These devices combine four popular functions, Power-on Reset
Control, Watchdog Timer, Supply Voltage Supervision, and Block Lock
Protect Serial EEPROM Memory in one package. This combination
lowers system cost, reduces board space requirements, and increases
reliability.
Applying power to the device activates the power-on reset circuit
which holds RESET/RESET active for a period of time. This allows
the power supply and oscillator to stabilize before the processor
executes code.
The Watchdog Timer provides an independent protection mechanism for
microcontrollers. When the microcontroller fails to restart a timer
within a selectable time out interval, the device activates the
RESET/RESET signal. The user selects the interval from three preset
values. Once selected, the interval does not change, even after
cycling the power.
The device’s low VCC detection circuitry protects the user’s system
from low voltage conditions, resetting the system when VCC falls
below the minimum VCC trip point.
RESET/RESET is asserted until VCC returns to proper operating level
and stabilizes. Four industry standard VTRIPthresholds are
available, however, Intersil’s unique circuits allow the threshold
to be reprogrammed to meet custom requirements or to fine-tune the
threshold for applications requiring higher precision.
The memory portion of the device is a CMOS Serial
EEPROM array with Intersil’s block lock protection. The array is
internally organized as 512 x 8. The device features a Serial
Peripheral Interface (SPI) and software protocol allowing operation
on a simple four-wire bus.
The device utilizes Intersil’s proprietary Direct Write™ cell,
providing a minimum endurance of 100,000 cycles and a minimum data
retention of 100 years.
Applications:
• Low VCC Detection and Reset Assertion
- Four standard reset threshold voltages 4.63V, 4.38V, 2.93V, 2.63V
- Re-program low VCC reset threshold voltage using special
programming sequence.
- Reset signal valid to VCC = 1V
• Selectable Time Out Watchdog Timer
• Long Battery Life with Low Power Consumption
- <50µA max standby current, watchdog on
- <10µA max standby current, watchdog off
• 4Kbits of EEPROM–1M Write Cycle Endurance
• Save Critical Data with Block Lock™ Memory
- Protect 1/4, 1/2, all or none of EEPROM array
• Built-in Inadvertent Write Protection
- Write enable latch
- Write protect pin
• SPI Interface - 3.3MHz Clock Rate
• Minimize Programming Time
- 16-byte page write mode
- 5ms write cycle time (typical)
• Available Packages
- 8 Ld MSOP, 8 Ld SOIC, 8 Ld PDIP
- 14 Ld TSSOP
• Pb-Free Plus Anneal Available (RoHS Compliant)
Specifications:
Datasheets | X5043, X5045 |
Product Photos | 8-DIP |
Standard Package | 50 |
Category | Integrated Circuits (ICs) |
Family | PMIC - Supervisors |
Series | - |
Packaging | Tube |
Type | Simple Reset/Power-On Reset |
Number of Voltages Monitored | 1 |
Output | Open Drain or Open Collector |
Reset | Active Low |
Reset Timeout | 100 ms Minimum |
Voltage - Threshold | 4.38V |
Operating Temperature | 0°C ~ 70°C |
Mounting Type | Through Hole |
Package / Case | 8-DIP (0.300", 7.62mm) |
Supplier Device Package | 8-PDIP |
Competitive Advantage:
Warranty :180 days !
Free shipping: Order over $1000 win a free shipment fee
(goods weight below 3Kg) ,during 20130901-20130930 .
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