X5325

CPU Supervisor with 32Kb SPI EEPROM

Product Status: Mass Production

OVERVIEW

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 TRIP 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.

KEY 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
  • <50µA max standby current, watchdog on
  • <1µA max standby current, watchdog off
  • <400µA 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 & 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 plus anneal available (RoHS compliant)

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
X5325
Basic Information
生产状态
Mass Production
供电电压Vs范围 (V)
4.5 to 5.5, 4.5 to 5.5, 2.7 to 5.5, 2.7 to 5.5
电压阈值1 (V)
4.63 (2.8%), 4.38 (2.7%), 2.93 (2.7%), 2.63 (3%)
复位输出类型
Active High
看门狗定时器
OFF, 0.2, 0.6, 1.4
手动复位
No
总线/输出接口
SPI
EEPROM大小
32 KBits
电池监控和切换
No
故障检测寄存器
No
后缀
-4.5A, Blank, -2.7A, -2.7
POR (ms)
200
RTC功能
No
特性
Replaces X25325
资质级别
Standard
温度范围
-40 to +85

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