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參數(shù)資料
| 型號： | X5323S8I-4.5A-T1 |
| 廠商： | INTERSIL CORP |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO8 |
| 封裝： | PLASTIC, SOIC-8 |
| 文件頁數(shù)： | 1/20頁 |
| 文件大小： | 341K |
| 代理商： | X5323S8I-4.5A-T1 |
1
FN8131.2
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
| Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2005, 2008. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
X5323, X5325
(Replaces X25323, X25325)
CPU Supervisor with 32kBit SPI EEPROM
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 can execute 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. Five industry standard VTRIP
thresholds 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.
Features
Selectable watchdog timer
Low VCC detection and reset assertion
- Five standard reset threshold voltages
- Re-program low VCC reset threshold voltage using
special programming sequence
- Reset signal valid to VCC = 1V
Determine watchdog or low voltage reset with a volatile
flag bit
Long battery life with low power consumption
- <50A max standby current, watchdog on
- <1A max standby current, watchdog off
- <400A max active current during read
32kbits of EEPROM
Built-in inadvertent write protection
- Power-up/power-down protection circuitry
- Protect 0, 1/4, 1/2 or all of EEPROM array with Block
Lock protection
- In circuit programmable ROM mode
2MHz SPI interface modes (0,0 and 1,1)
Minimize EEPROM programming time
- 32-byte page write mode
- Self-timed write cycle
- 5ms write cycle time (typical)
2.7V to 5.5V and 4.5V to 5.5V power supply
operation
Available packages
- 14 Ld TSSOP, 8 Ld SOIC, 8 Ld PDIP
Pb-free (RoHS compliant)
Block Diagram
WATCHDOG
TIMER RESET
DATA
REGISTER
COMMAND
DECODE AND
CONTROL
LOGIC
SI
SO
SCK
CS/WDI
VCC
RESET AND
WATCHDOG
TIMEBASE
POWER-ON AND
GENERATION
VTRIP
+
-
RESET/RESET
RESET
LOW VOLTAGE
STATUS
REGISTER
PROTECT LOGIC
8kBITS
16kBITS
EEP
ROM
AR
RAY
WATCHDOG TRANSITION
DETECTOR
WP
X5323 = RESET
X5325 = RESET
VCC THRESHOLD
RESET LOGIC
Data Sheet
June 30, 2008
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