M48T37V

Active

5.0 or 3.3 V, 256 Kbit (32 Kbit x 8) TIMEKEEPER® SRAM

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Product overview

Description

The M48T37Y/V TIMEKEEPER®RAM is a 32 Kb x 8 non-volatile static RAM and real-time clock. The monolithic chip is available in a special package which provides a highly integrated battery-backed memory and real-time clock solution. The 44-lead, 330 mil SOIC package 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/crystal 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 packages are shipped separately in plastic anti-static tubes or in tape & reel form. For the 44-lead SOIC, the battery/crystal package (e.g., SNAPHAT) part number is “M4T28-BR12SH” or “M4T32-BR12SH”.
  • All features

    • Integrated ultra low power SRAM, real-time clock, power-fail control circuit, and battery
    • Frequency test output for real-time clock software calibration
    • Automatic power-fail chip deselect and WRITE protection
    • Watchdog timer
    • WRITE protect voltage (VPFD= Power-fail deselect voltage):
      • M48T37Y: VCC= 4.5 to 5.5 V 4.2 V ≤ VPFD≤ 4.5 V
      • M48T37V: VCC= 3.0 to 3.6 V 2.7 V ≤ VPFD≤ 3.0 V
    • Packaging includes a 44-lead SOIC and SNAPHAT®top (to be ordered separately)
    • SOIC package provides direct connection for a SNAPHAT®top which contains the battery and crystal
    • Microprocessor power-on reset (valid even during battery backup mode)
    • Programmable alarm output active in the battery backup mode
    • Battery low flag
    • RoHS compliant
      • Lead-free second level interconnect

Circuit Diagram

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
M48T37V-10MH1F
Active
SO-44 Industrial Ecopack1

M48T37V-10MH1F

Package:

SO-44

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SO-44

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.

Sample & Buy

Part Number
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Marketing Status
ECCN (US)
ECCN (EU)
Packing Type
Package
Temperature (°C) Country of Origin
Budgetary Price (US$)*/Qty
min
max
M48T37V-10MH1F Available at 4 distributors

Distributor availability ofM48T37V-10MH1F

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1493 1 Order Now
Newark Element14 AMERICA 22 0 Order Now
MOUSER WORLDWIDE 782 1 Order Now
Farnell Element14 EUROPE 668 1 Order Now

Distributor reported inventory date: 2021-04-08

Distributor Name

DIGIKEY

Stock

1493

Min.Order

1

Region

WORLDWIDE Order Now

Newark Element14

Stock

22

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

782

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

668

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-04-08

Buy Direct
Active
EAR99 NEC Tape And Reel SO-44 0 70 MALAYSIA 11.171 / 1k

M48T37V-10MH1F

Marketing Status

Active

ECCN (US)

EAR99

Distributor availability ofM48T37V-10MH1F

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1493 1 Order Now
Newark Element14 AMERICA 22 0 Order Now
MOUSER WORLDWIDE 782 1 Order Now
Farnell Element14 EUROPE 668 1 Order Now

Distributor reported inventory date: 2021-04-08

Distributor Name

DIGIKEY

Stock

1493

Min.Order

1

Region

WORLDWIDE Order Now

Newark Element14

Stock

22

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

782

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

668

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-04-08

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SO-44

Operating Temperature (°C)

(min)

0

(max)

70

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