Home  DS1644-120+  DS1644-120+ VS 6441

DS1644-120 vs DS1644-120+ Comparison

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    DS1644-120
    DS1644-120
    DS1644-120+
    DS1644-120+
  • Part No.
    DS1644-120
    DS1644-120+
  • Description
    32K x 8 nonvolatile timekeeping static RAM, 120ns access
    Real Time Clock (RTC) IC Clock/Calendar 32KB Parallel 28-DIP Module (0.600", 15.24mm)
  • Manufacturer
    Dallas semiconductor
    Maxim integrated
  • Classification
    -
    Real Time Clocks
  • Reference Price(USD)
    -
    $20.237
  • Inventory(pcs)
    0
    0
  • Case/Package
    DIP
    DIP-28
  • Number of Pins
    -
    28
  • Memory Size
    -
    32000 B
  • Number of Positions
    -
    28
  • Operating Voltage
    -
    4.5V ~ 5.5V
  • Access Time
    -
    120 ns
  • Supply Voltage (DC)
    -
    4.50V (max)
  • Operating Temperature
    -
    0℃ ~ 70℃
  • Size-Length
    -
    39.12 mm
  • Size-Width
    -
    18.29 mm
  • Size-Height
    -
    9.4 mm
  • Mounting Style
    -
    Through Hole
  • Packaging
    -
    Each
  • Lead-Free Status
    -
    Lead Free
  • RoHS
    -
    RoHS Compliant
  • Product Lifecycle Status
    Unknown
    Not Recommended for New Designs
  • Operating Temperature (Min)
    -
    0 ℃
  • Supply Voltage
    -
    4.5V ~ 5.5V
  • Supply Voltage (Max)
    -
    5.5 V
  • Supply Voltage (Min)
    -
    4.5 V
  • Industrial-Spec
    -
    Yes
  • Operating Temperature (Max)
    -
    70 ℃
  • Overview
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    DS1644-120+ Product overview

    The DS1644-120+ is a non-volatile Static RAM with a full function real time clock, which are both accessible in a byte-wide format. The non-volatile timekeeping RAM is functionally equivalent to any JEDEC standard 32k x 8 SRAM. The device can also be easily substituted for ROM, EPROM and EEPROM, providing read/write non-volatility and the addition of the real time clock function. The real time clock information resides in the eight uppermost RAM locations. The RTC registers contain year, month, date, day, hours, minutes and seconds data in 24-hour BCD format. Corrections for the day of the month and leap year are made automatically. The RTC clock registers are double-buffered to avoid access of incorrect data that can occur during clock update cycles. The double-buffered system also prevents time loss as the timekeeping countdown continues unabated by access to time register data.

    .
    Integrated NV SRAM, real-time clock, crystal, power-fail control circuit and Lithium energy source
    .
    Clock registers are accessed identically to the static RAM
    .
    Totally non-volatile with over 10 years of operation in the absence of power
    .
    Leap year compensation valid up to 2100
    .
    Power-fail write protection allows for ±10% VCC power supply tolerance
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DS1644-120+ Alternative Parts

Image Part Compare Manufacturer Category Description
Image:DS1644-120+ Mfr.Part#:DS1644-120+ Compare: Current Part Manufacturers:Maxim integrated Category:Real Time Clocks Description:Real N/Ame clock (rtc) ic clock/calendar 32kb parallel 28-dip module (0.600", 15.24mm)
Image:DS1644-120 Mfr.Part#:DS1644-120 Compare: DS1644-120+ VS DS1644-120 Manufacturers:Maxim integrated Category:Real Time Clocks Description:Real N/Ame clock parallel 32kbyte clock/calendar/nv N/Amekeeping ram 28pin edip
Image:6441 Mfr.Part#:6441 Compare: DS1644-120+ VS 6441 Manufacturers:Maxim integrated Category: Description:Real N/Ame clock, non-volaN/Ale, 0 N/Amer(s), cmos, module, dip-28
Image:DS1644-120 Mfr.Part#:DS1644-120 Compare: DS1644-120+ VS DS1644-120 Manufacturers:Dallas semiconductor Category: Description:32k x 8 nonvolaN/Ale N/Amekeeping staN/Ac ram, 120ns access