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

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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”.

    主要特性

    • 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

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从分销商订购
从ST订购
M48T18-100PC1 PDIP 28 .7 Tube
Active
10000 EAR99 MALAYSIA 查看供货情况

Distributor availability ofM48T18-100PC1

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 69 1 Order Now
RS COMPONENTS EUROPE 712 1 Order Now
AVNET AMERICA 708 0 Order Now
ARROW EUROPE 39 0 Order Now
Newark Element14 AMERICA 14 0 Order Now
MOUSER WORLDWIDE 873 1 Order Now
Farnell Element14 EUROPE 120 1 Order Now

代理商库存报告日期: 2019-09-17

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69

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712

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39

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14

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MOUSER

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873

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120

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1

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代理商库存报告日期: 2019-09-17

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M48T18-150PC1 PDIP 28 .7 Tube
Active
- EAR99 MALAYSIA 查看供货情况

Distributor availability ofM48T18-150PC1

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 350 1 Order Now
RS COMPONENTS EUROPE 242 1 Order Now
AVNET AMERICA 8 0 Order Now
FUTURE WORLDWIDE 168 12 Order Now
ARROW EUROPE 252 0 Order Now
MOUSER WORLDWIDE 229 1 Order Now
Farnell Element14 EUROPE 278 1 Order Now

代理商库存报告日期: 2019-09-17

代理商名称

DIGIKEY

库存

350

Min.Order

1

地区

WORLDWIDE Order Now

RS COMPONENTS

库存

242

Min.Order

1

地区

EUROPE Order Now

AVNET

库存

8

Min.Order

0

地区

AMERICA Order Now

FUTURE

库存

168

Min.Order

12

地区

WORLDWIDE Order Now

ARROW

库存

252

Min.Order

0

地区

EUROPE Order Now

MOUSER

库存

229

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1

地区

WORLDWIDE Order Now

Farnell Element14

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278

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1

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EUROPE Order Now

代理商库存报告日期: 2019-09-17

立即购买

M48T18-100PC1

封装

PDIP 28 .7

包装类型

Tube

Distributor availability ofM48T18-100PC1

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 69 1 Order Now
RS COMPONENTS EUROPE 712 1 Order Now
AVNET AMERICA 708 0 Order Now
ARROW EUROPE 39 0 Order Now
Newark Element14 AMERICA 14 0 Order Now
MOUSER WORLDWIDE 873 1 Order Now
Farnell Element14 EUROPE 120 1 Order Now

代理商库存报告日期: 2019-09-17

代理商名称

DIGIKEY

库存

69

Min.Order

1

地区

WORLDWIDE Order Now

RS COMPONENTS

库存

712

Min.Order

1

地区

EUROPE Order Now

AVNET

库存

708

Min.Order

0

地区

AMERICA Order Now

ARROW

库存

39

Min.Order

0

地区

EUROPE Order Now

Newark Element14

库存

14

Min.Order

0

地区

AMERICA Order Now

MOUSER

库存

873

Min.Order

1

地区

WORLDWIDE Order Now

Farnell Element14

库存

120

Min.Order

1

地区

EUROPE Order Now

代理商库存报告日期: 2019-09-17

供货状态

Active

数量

10000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

M48T18-150PC1

封装

PDIP 28 .7

包装类型

Tube

Distributor availability ofM48T18-150PC1

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 350 1 Order Now
RS COMPONENTS EUROPE 242 1 Order Now
AVNET AMERICA 8 0 Order Now
FUTURE WORLDWIDE 168 12 Order Now
ARROW EUROPE 252 0 Order Now
MOUSER WORLDWIDE 229 1 Order Now
Farnell Element14 EUROPE 278 1 Order Now

代理商库存报告日期: 2019-09-17

代理商名称

DIGIKEY

库存

350

Min.Order

1

地区

WORLDWIDE Order Now

RS COMPONENTS

库存

242

Min.Order

1

地区

EUROPE Order Now

AVNET

库存

8

Min.Order

0

地区

AMERICA Order Now

FUTURE

库存

168

Min.Order

12

地区

WORLDWIDE Order Now

ARROW

库存

252

Min.Order

0

地区

EUROPE Order Now

MOUSER

库存

229

Min.Order

1

地区

WORLDWIDE Order Now

Farnell Element14

库存

278

Min.Order

1

地区

EUROPE Order Now

代理商库存报告日期: 2019-09-17

供货状态

Active

数量

-

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

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技术文档

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      DS0494
      5 V, 64 Kbit (8 Kb x 8) TIMEKEEPER® SRAM
      11.1
      492.02 KB
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      DS0494

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

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      AN1011
      ST NVRAM 和实时时钟(RTC)产品中使用的电池技术
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      How to use the digital calibration feature in TIMEKEEPER® and serial real-time clock (RTC) products
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      Managing century information using serial real-time clocks and TIMEKEEPER® NVRAMs
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      Negative undershoot NVRAM data corruption
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      AN1012
      预测NVRAM 和串行RTC 的电池寿命和数据保存期限
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      AN925
      Time update in ST's TIMEKEEPER® devices
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      AN968
      VMEbus TIMEKEEPER® requirements
      2.0
      94.96 KB
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      AN1011

      ST NVRAM 和实时时钟(RTC)产品中使用的电池技术

      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

      预测NVRAM 和串行RTC 的电池寿命和数据保存期限

      AN925

      Time update in ST's TIMEKEEPER® devices

      AN968

      VMEbus TIMEKEEPER® requirements

硬件型号、CAD库及SVD

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      Ibis model 1.0
      15.62 KB
      ZIP
      Ibis model 1.0
      15.61 KB
      ZIP

      Ibis model

      Ibis model

质量与可靠性

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      Products Underwriter Laboratories (UL) Information 2.1
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      Products Underwriter Laboratories (UL) Information 2.1
      163 KB
      PDF

      Products Underwriter Laboratories (UL) Information

      Products Underwriter Laboratories (UL) Information

产品型号 供货状态 封装 等级规格 符合RoHS级别 材料声明**
M48T18-100PC1
Active
PDIP 28 .7 工业 Ecopack1
M48T18-150PC1
Active
PDIP 28 .7 工业 Ecopack1

M48T18-100PC1

Package:

PDIP 28 .7

Material Declaration**:

PDF XML

Marketing Status

Active

Package

PDIP 28 .7

Grade

Industrial

RoHS Compliance Grade

Ecopack1

M48T18-150PC1

Package:

PDIP 28 .7

Material Declaration**:

PDF XML

Marketing Status

Active

Package

PDIP 28 .7

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.