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X4045M8I Datasheet

  • X4045M8I

  • CPU Supervisor with 4Kbit EEPROM

  • 25頁

  • XICOR   XICOR

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4K
X4043/45
CPU Supervisor with 4Kbit EEPROM
512 x 8 Bit
FEATURES
鈥?Selectable watchdog timer
鈥?Low V
CC
detection and reset assertion
鈥擣ive standard reset threshold voltages
鈥擜djust low V
CC
reset threshold voltage using
special programming sequence
鈥擱eset signal valid to V
CC
= 1V
鈥?Low power CMOS
鈥?lt;20碌A(chǔ) max standby current, watchdog on
鈥?lt;1碌A(chǔ) standby current, watchdog OFF
鈥?mA active current
鈥?4Kbits of EEPROM
鈥?6-byte page write mode
鈥擲elf-timed write cycle
鈥?ms write cycle time (typical)
鈥?Built-in inadvertent write protection
鈥擯ower-up/power-down protection circuitry
鈥擯rotect 0, 1/4, 1/2, all or 16, 32, 64 or 128 bytes
of EEPROM array with Block Lock
鈩?/div>
protection
鈥?400kHz 2-wire interface
鈥?2.7V to 5.5V power supply operation
鈥?Available packages
鈥?-lead SOIC
鈥?-lead MSOP
鈥?-lead PDIP
DESCRIPTION
The X4043/45 combines 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 require-
ments, 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 oscilla-
tor to stabilize before the processor can execute code.
The Watchdog Timer provides an independent protection
mechanism for microcontrollers. When the microcon-
troller 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鈥檚 low V
CC
detection circuitry protects the
user鈥檚 system from low voltage conditions, resetting the
system when V
CC
falls below the minimum V
CC
trip
point. RESET/RESET is asserted until V
CC
returns to
proper operating level and stabilizes. Five industry stan-
dard V
TRIP
thresholds are available, however, Xicor鈥檚
unique circuits allow the threshold to be reprogrammed
to meet custom requirements or to 鏗乶e-tune the thresh-
old for applications requiring higher precision.
BLOCK DIAGRAM
Watchdog Transition
Detector
WP
SDA
Data
Register
Command
Decode &
Control
Logic
V
CC
Threshold
Reset logic
Block Lock Control
Protect Logic
Status
Register
EEPROM Array
2Kbits 1Kb 1Kb
RESET (X4043)
RESET (X4045)
Reset &
Watchdog
Timebase
Watchdog
Timer Reset
SCL
V
CC
V
TRIP
+
-
Power on and
Low Voltage
Reset
Generation
REV 1.1.17 9/14/01
www.xicor.com
Characteristics subject to change without notice.
1 of 25

X4045M8I 產(chǎn)品屬性

  • 80

  • 集成電路 (IC)

  • PMIC - 監(jiān)控器

  • -

  • 簡單復(fù)位/加電復(fù)位

  • 1

  • 開路漏極或開路集電極

  • 高有效

  • 最小為 100 ms

  • 4.38V

  • -40°C ~ 85°C

  • 表面貼裝

  • 8-TSSOP，8-MSOP（0.118"，3.00mm 寬）

  • 8-MSOP

  • 管件

X4045M8I相關(guān)型號(hào)PDF文件下載

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  • 英文版
    CPU Supervisor with 4kbit EEPROM
    INTERSIL
  • 英文版
    CPU Supervisor with 4Kbit EEPROM
    XICOR
  • 英文版
    CPU Supervisor with 4kbit EEPROM
    INTERSIL [...
  • 英文版
    CPU Supervisor with 4Kbit EEPROM
    XICOR [Xic...
  • 英文版
    CPU Supervisor with 4Kbit EEPROM
    XICOR
  • 英文版
    CPU Supervisor with 4kbit EEPROM
    INTERSIL
  • 英文版
    Dual Voltage Monitor with Intergrated CPU Supervisor
    INTERSIL
  • 英文版
    Dual Voltage Monitor with Intergrated CPU Supervisor
    INTERSIL [...
  • 英文版
    Dual Voltage Monitor with Intergrated CPU Supervisor
    INTERSIL
  • 英文版
    Dual Voltage Monitor with Intergrated CPU Supervisor
    INTERSIL [...
  • 英文版
    Dual Voltage Monitor with Intergrated CPU Supervisor
    INTERSIL [...
  • 英文版
    Dual Voltage Monitor with Intergrated CPU Supervisor
    INTERSIL
  • 英文版
    Dual Voltage Monitor with Intergrated CPU Supervisor
    INTERSIL [...
  • 英文版
    Dual Voltage Monitor with Integrated CPU Supervisor and Syst...
    INTERSIL
  • 英文版
    Dual Voltage Monitor with Integrated CPU Supervisor and Syst...
    XICOR
  • 英文版
    Dual Voltage Monitor with Integrated CPU Supervisor and Syst...
    INTERSIL [...
  • 英文版
    Dual Voltage Monitor with Integrated CPU Supervisor and Syst...
    XICOR [Xic...
  • 英文版
    Dual Voltage Monitor with Integrated CPU Supervisor and Syst...
    XICOR
  • 英文版
    Dual Voltage Monitor with Integrated CPU Supervisor and Syst...
    XICOR [Xic...
  • 英文版
    Triple Voltage Monitor with Integrated CPU Supervisor
    INTERSIL

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