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M48T08-150PC1

Real Time Clock Parallel 8Kbyte Clock/Calendar/NV Timekeeping RAM/Battery Backup 28-Pin PCDIP Tube

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M48T08-150PC1 General Description

The M48T08/18/08Y TIMEKEEPER?RAM is an 8 K x 8 non-volatile static RAM and real-time clock which is pin and function compatible with the DS1643. The monolithic chip is available in two special packages to provide a highly integrated battery-backed memory and real-time clock solution.The M48T08/18/08Y is a non-volatile pin and function equivalent to any JEDEC standard 8 K x 8 SRAM. It also easily fits into many ROM, EPROM, and EEPROM sockets, providing the non-volatility of PROMs without any requirement for special WRITE timing or limitations on the number of WRITEs that can be performed.The 28-pin, 600 mil DIP CAPHAT? houses the M48T08/18/08Y silicon with a quartz crystal and a long-life lithium button cell in a single package.The 28-pin, 330 mil SOIC provides sockets with gold-plated contacts at both ends for direct connection to a separate SNAPHAT?housing containing the battery and crystal. The unique design allows the SNAPHAT?battery package to be mounted on top of the SOIC package after the completion of the surface mount process. Insertion of the SNAPHAT?housing after reflow prevents potential battery and crystal damage due to the high temperatures required for device surface-mounting. The SNAPHAT?housing is keyed to prevent reverse insertion.The SOIC and battery/crystal packages are shipped separately in plastic anti-static tubes or in tape & reel form. For the 28-lead SOIC, the battery/crystal package (e.g., SNAPHAT?) part number is “M4T28-BR12SH” or “M4T32-BR12SH”.

m48t08-150pc1 m48t08-150pc1

Key Features

  • Integrated ultra low power SRAM, real-time clock, power-fail control circuit, and battery
  • BYTEWIDE?RAM-like clock access
  • BCD coded year, month, day, date, hours, minutes, and seconds
  • Typical clock accuracy of ±1 minute a month, at 25 °C
  • Automatic power-fail chip deselect and WRITE protection
  • WRITE protect VPFD= power-fail deselect voltage):
    • M48T08: VCC= 4.75 to 5.5 V; 4.5 V ≤ VPFD≤ 4.75 V
    • M48T18/T08Y: VCC= 4.5 to 5.5 V; 4.2 V ≤ VPFD≤ 4.5 V
  • Software controlled clock calibration for high accuracy applications
  • Self-contained battery and crystal in the CAPHAT?DIP package
  • Packaging includes a 28-lead SOIC and SNAPHAT? top (to be ordered separately)
  • SOIC package provides direct connection for a snaphat top which contains the battery and crystal
  • Pin and function compatible with DS1643 and JEDEC standard 8 K x 8 SRAMs
  • RoHS compliant
    • Lead-free second level interconnect
m48t08-150pc1 m48t08-150pc1

Application

  • Embedded Systems: Used in devices requiring a real-time clock and data storage functionality.
  • Industrial Automation: Applied in systems requiring timekeeping and non-volatile memory.
  • Computer Systems: Utilized in computer motherboards for real-time clock functions and storage of system information like BIOS settings.
  • Consumer Electronics: Used in various consumer devices requiring timekeeping and non-volatile memory storage.
m48t08-150pc1 m48t08-150pc1

Specifications

Category Integrated Circuits (ICs)Clock/TimingReal Time Clocks Series Timekeeper®
Programmable Not Verified Type Clock/Calendar
Features Leap Year, Watchdog Timer Memory Size -
Time Format HH:MM:SS (24 hr) Date Format YY-MM-DD-dd
Interface Parallel Voltage - Supply 4.75V ~ 5.5V
Voltage - Supply, Battery - Current - Timekeeping (Max) 3mA @ 4.7V ~ 5.5V
Operating Temperature 0°C ~ 70°C Mounting Type Through Hole
Base Product Number M48T08 Product Category Real Time Clock
Mounting Style Through Hole RTC Bus Interface Parallel
Battery Backup Switching Integrated Battery RTC Memory Size 8 kB
Supply Voltage - Max 5.5 V Supply Voltage - Min 4.75 V
Minimum Operating Temperature 0 C Maximum Operating Temperature + 70 C
Function Calendar, Clock, NV Timekeeping RAM Product Type Real Time Clocks
Factory Pack Quantity 240 Subcategory Clock & Timer ICs
Unit Weight 0.147798 oz

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Ratings and Reviews

More
N
N**s 11/27/2023

Thank you for sending. I haven't test it.

15
Z
Z**e 04/20/2023

Everything is fine, i take not the first time

16
E
E**a 10/24/2021

Long walked, not tracked. But everything is ok.

16

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Availability: 240 PCS

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