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  • The M54HCxxx and M54HCTxxx series are composed of 90 types of high speed CMOS functions specifically designed to meet the radiation requirements of the aerospace industry. They include a large set of gates, flip-flops, multiplexers, counters, bus interface and several other functions. The radiation hardness, the single event latch-up (SEL) immunity and the housing in hermetic packages of all types of both series make them ideally suited for use in the most difficult environmental conditions.

    Key Features

    • 2 to 6 V operating voltage
    • Low power DC dissipation: 1 μA max. at 25 °C
    • High speed tPD = 8 ns typ. at 25 °C
    • Symmetrical outputs characteristics
    • High noise immunity: 28 % of min. VCC
    • Hermetic packages
    • Rad-hard 50 krad (Si)
    • SEL immune up to 110 MeV/mg/cm²
    • ESCC qualified
    • Same die and electrical specification for engineering and flight models
    • The complete specification of each type is available from the ESCC web site: https://escies.org using its ESCC part number. STMicroelectronics®guarantees full compliance of qualified parts with these ESCC specifications.

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
M54HC251DG
Active
DIL-16 Industrial N/A
M54HC251K1
Active
Flat-16E Industrial N/A
M54HC251KG
Active
Flat-16E Industrial N/A
M54HC251KT
Active
Flat-16E Industrial N/A

M54HC251DG

Package:

DIL-16

Material Declaration**:

Marketing Status

Active

Package

DIL-16

Grade

Industrial

RoHS Compliance Grade

N/A

M54HC251K1

Package:

Flat-16E

Material Declaration**:

Marketing Status

Active

Package

Flat-16E

Grade

Industrial

RoHS Compliance Grade

N/A

M54HC251KG

Package:

Flat-16E

Material Declaration**:

Marketing Status

Active

Package

Flat-16E

Grade

Industrial

RoHS Compliance Grade

N/A

M54HC251KT

Package:

Flat-16E

Material Declaration**:

Marketing Status

Active

Package

Flat-16E

Grade

Industrial

RoHS Compliance Grade

N/A

(**) 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
Order from Distributors
Order from ST
Marketing Status
ECCN (US)
ECCN (EU)
Packing Type
Package
Temperature (°C) SMD PIN/Detailed Spec
Budgetary Price (US$)*/Qty
More info
min
max
M54HC251DG No availability of distributors reported, please contact our sales office
Active
EAR99 NEC Carrier Tape DIL-16 - - 940804810F
MORE INFO

Quality Level:

ESCC Flight

Hi-Rel Package:

DIL-16

Lead Finish:

Gold

Package: Product Marking:

940804810F

Country of Origin:

FRANCE

M54HC251K1 No availability of distributors reported, please contact our sales office
Active
EAR99 NEC Carrier Tape Flat-16E - - -
MORE INFO

Quality Level:

Engineering Model

Hi-Rel Package:

Flat-16E

Lead Finish:

Gold

Package: Product Marking:

M54HC251K1

Country of Origin:

FRANCE

M54HC251KG No availability of distributors reported, please contact our sales office
Active
EAR99 NEC Carrier Tape Flat-16E - - 940804801F
MORE INFO

Quality Level:

ESCC Flight

Hi-Rel Package:

Flat-16E

Lead Finish:

Gold

Package: Product Marking:

940804801F

Country of Origin:

FRANCE

M54HC251KT No availability of distributors reported, please contact our sales office
Active
EAR99 NEC Carrier Tape Flat-16E - - 940804802F
MORE INFO

Quality Level:

ESCC Flight

Hi-Rel Package:

Flat-16E

Lead Finish:

Solder Dip

Package: Product Marking:

940804802F

Country of Origin:

FRANCE

M54HC251DG

Marketing Status

Active

ECCN (US)

EAR99

ECCN (EU)

NEC

Packing Type

Carrier Tape

Package

DIL-16

Operating Temperature (°C)

(min)

-

(max)

-

SMD PIN/Detailed Spec

940804810F

Quality Level

ESCC Flight

Hi-Rel Package

DIL-16

Lead Finish

Gold

Package: Product Marking

940804810F

Country of Origin

FRANCE

M54HC251K1

Marketing Status

Active

ECCN (US)

EAR99

ECCN (EU)

NEC

Packing Type

Carrier Tape

Package

Flat-16E

Operating Temperature (°C)

(min)

-

(max)

-

SMD PIN/Detailed Spec

-

Quality Level

Engineering Model

Hi-Rel Package

Flat-16E

Lead Finish

Gold

Package: Product Marking

M54HC251K1

Country of Origin

FRANCE

M54HC251KG

Marketing Status

Active

ECCN (US)

EAR99

ECCN (EU)

NEC

Packing Type

Carrier Tape

Package

Flat-16E

Operating Temperature (°C)

(min)

-

(max)

-

SMD PIN/Detailed Spec

940804801F

Quality Level

ESCC Flight

Hi-Rel Package

Flat-16E

Lead Finish

Gold

Package: Product Marking

940804801F

Country of Origin

FRANCE

M54HC251KT

Marketing Status

Active

ECCN (US)

EAR99

ECCN (EU)

NEC

Packing Type

Carrier Tape

Package

Flat-16E

Operating Temperature (°C)

(min)

-

(max)

-

SMD PIN/Detailed Spec

940804802F

Quality Level

ESCC Flight

Hi-Rel Package

Flat-16E

Lead Finish

Solder Dip

Package: Product Marking

940804802F

Country of Origin

FRANCE

(*) 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