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  • 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”.

    主な特徴

    • Integrated ultra low power SRAM, real-time clock, power-fail control circuit, and battery
    • BYTEWIDERAM-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 CAPHATDIP 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

回路ダイアグラム

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サンプル & 購入

製品型番
パッケージ
梱包タイプ
製品ステータス
数量
ECCN (US)
Country of Origin
販売代理店からオーダー
STからオーダー
M48T08Y-10MH1F SO-28 Tape And Reel
アクティブ
10000 EAR99 MALAYSIA 在庫チェック

Distributor availability ofM48T08Y-10MH1F

代理店名
地域 在庫 最小発注 Third party link
DIGIKEY WORLDWIDE 10 1 Order Now
ARROW EUROPE 1798 0 Order Now

代理店レポートによる在庫データ: 2019-10-04

代理店名

DIGIKEY

在庫

10

Min.Order

1

地域

WORLDWIDE Order Now

ARROW

在庫

1798

Min.Order

0

地域

EUROPE Order Now

代理店レポートによる在庫データ: 2019-10-04

M48T08Y-10MH1F

パッケージ

SO-28

梱包タイプ

Tape And Reel

Distributor availability ofM48T08Y-10MH1F

代理店名
地域 在庫 最小発注 Third party link
DIGIKEY WORLDWIDE 10 1 Order Now
ARROW EUROPE 1798 0 Order Now

代理店レポートによる在庫データ: 2019-10-04

代理店名

DIGIKEY

在庫

10

Min.Order

1

地域

WORLDWIDE Order Now

ARROW

在庫

1798

Min.Order

0

地域

EUROPE Order Now

代理店レポートによる在庫データ: 2019-10-04

製品ステータス

アクティブ

数量

10000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

推奨コンテンツ

00 ファイルがダウンロード用に選択されています

技術文書

    • 概要 バージョン サイズ アクション
      DS0494
      5 V, 64 Kbit (8 Kb x 8) TIMEKEEPER® SRAM
      11.1
      492.02 KB
      PDF
      DS0494

      5 V, 64 Kbit (8 Kb x 8) TIMEKEEPER® SRAM

    • 概要 バージョン サイズ アクション
      AN1011
      STマイクロエレクトロニクスのNVRAMおよびリアルタイムクロック(RTC)製品で使用されているバッテリー技術
      4.0
      476.81 KB
      PDF
      AN934
      How to use the digital calibration feature in TIMEKEEPER® and serial real-time clock (RTC) products
      4.1
      123.42 KB
      PDF
      AN923
      Managing century information using serial real-time clocks and TIMEKEEPER® NVRAMs
      4.0
      142.23 KB
      PDF
      AN1009
      Negative undershoot NVRAM data corruption
      2.0
      82.05 KB
      PDF
      AN1012
      NVRAMおよびシリアルRTCのバッテリー寿命とデータ保持時間の予測
      1.0
      859.28 KB
      PDF
      AN925
      Time update in ST's TIMEKEEPER® devices
      2.0
      119.68 KB
      PDF
      AN1011

      STマイクロエレクトロニクスのNVRAMおよびリアルタイムクロック(RTC)製品で使用されているバッテリー技術

      AN934

      How to use the digital calibration feature in TIMEKEEPER® and serial real-time clock (RTC) products

      AN923

      Managing century information using serial real-time clocks and TIMEKEEPER® NVRAMs

      AN1009

      Negative undershoot NVRAM data corruption

      AN1012

      NVRAMおよびシリアルRTCのバッテリー寿命とデータ保持時間の予測

      AN925

      Time update in ST's TIMEKEEPER® devices

品質 & 信頼性

    • 概要 バージョン サイズ アクション
      Products Underwriter Laboratories (UL) Information 2.1
      163 KB
      PDF

      Products Underwriter Laboratories (UL) Information

製品型番 製品ステータス パッケージ グレード RoHSコンプライアンスグレード 材料宣誓書**
M48T08Y-10MH1F
アクティブ
SO-28 インダストリアル Ecopack1

M48T08Y-10MH1F

Package:

SO-28

Material Declaration**:

Marketing Status

アクティブ

Package

SO-28

Grade

Industrial

RoHS Compliance Grade

Ecopack1

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.