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X4285V8 Datasheet

  • X4285V8

  • CPU Supervisor with 128K EEPROM

  • 22頁

  • XICOR   XICOR

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Preliminary Information
128K
X4283/85
CPU Supervisor with 128K EEPROM
DESCRIPTION
16K x 8 Bit
FEATURES
鈥?Selectable watchdog timer
鈥?Low V
CC
detection and reset assertion
鈥擣our 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?128Kbits of EEPROM
鈥?4 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 64, 128, 256 or 512
bytes of EEPROM array with programmable
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 TSSOP
BLOCK DIAGRAM
Watchdog Transition
Detector
WP
Data
Register
Command
Decode &
Control
Logic
V
CC
Threshold
Reset logic
Block Lock Control
Protect Logic
The X4283/85 combines four popular functions,
Power-on Reset Control, Watchdog Timer, Supply Volt-
age 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 protec-
tion mechanism for microcontrollers. When the micro-
controller 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 set minimum V
CC
trip point. RESET/RESET is asserted until V
CC
returns
to proper operating level and stabilizes. Four industry
Watchdog
Timer Reset
SDA
Status
Register
EEPROM Array
8Kb 4Kb 4Kb
RESET (X4283)
RESET (X4285)
SCL
S0
S1
Reset &
Watchdog
Timebase
V
CC
V
TRIP
+
-
Power on and
Low Voltage
Reset
Generation
REV 1.17 11/27/00
www.xicor.com
Characteristics subject to change without notice.
1 of 22

X4285V8 產(chǎn)品屬性

  • 200

  • 集成電路 (IC)

  • PMIC - 監(jiān)控器

  • -

  • 簡(jiǎn)單復(fù)位/加電復(fù)位

  • 1

  • -

  • 高有效

  • 最小為 100 ms

  • 4.38V

  • 0°C ~ 70°C

  • 表面貼裝

  • 8-TSSOP（0.173"，4.40mm 寬）

  • 8-TSSOP

  • 管件

X4285V8相關(guān)型號(hào)PDF文件下載

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  • 英文版
    CPU Supervisor with 128K EEPROM
    INTERSIL
  • 英文版
    CPU Supervisor with 128K EEPROM
    XICOR
  • 英文版
    CPU Supervisor with 128K EEPROM
    INTERSIL [...
  • 英文版
    CPU Supervisor with 128K EEPROM
    XICOR [Xic...
  • 英文版
    CPU Supervisor with 128K EEPROM
    XICOR
  • 英文版
    CPU Supervisor with 128K EEPROM
    XICOR [Xic...
  • 英文版
    CPU Supervisor with 128K EEPROM
    XICOR
  • 英文版
    CPU Supervisor with 128K EEPROM
    XICOR [Xic...
  • 英文版
    CPU Supervisor with 128K EEPROM
    XICOR [Xic...
  • 英文版
    CPU Supervisor with 128K EEPROM
    XICOR
  • 英文版
    CPU Supervisor with 128K EEPROM
    XICOR [Xic...
  • 英文版
    CPU Supervisor with 128K EEPROM
    XICOR
  • 英文版
    CPU Supervisor with 128K EEPROM
    XICOR [Xic...
  • 英文版
    CPU Supervisor with 128K EEPROM
    XICOR
  • 英文版
    CPU Supervisor with 128K EEPROM
    XICOR [Xic...
  • 英文版
    CPU Supervisor with 128K EEPROM
    XICOR
  • 英文版
    CPU Supervisor with 128K EEPROM
    XICOR [Xic...
  • 英文版
    CPU Supervisor with 128K EEPROM
    XICOR
  • 英文版
    CPU Supervisor with 128K EEPROM
    XICOR [Xic...
  • 英文版
    CPU Supervisor with 128K EEPROM
    XICOR

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