Product overview
Description
The M54HCxxx and M54HCTxxx series is composed of 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 maximum operating frequency of the HC/HCT series varies between 20 to 55 MHz at 4.5 V and 25 °C depending on the products.
All types of the series feature a total dose hardness at 50 krad(Si), a high single event latch-up (SEL) immunity and a wide operating temperature range.
Housed in ceramic hermetic packages, all the products of the series are ESCC qualified, making them ideally suited for use in space and other harsh environmental conditions.
The complete specification of each type is available from the ESCC web site: https://escies.org using its ESCC part number.
Dedicated technical notes provide additional information on:
- TN1181: Engineering model quality level
- TN0873: Manufacturing and quality specification of products in die form
- TN1292: 100 krad(Si) versions
- TN0985: "Class S equivalent" flow specification, for use of ESCC products in a MIL-STD-883 environment.
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All features
- ESCC qualified
- 7 V Absolute maximum ratings
- 2 V to 6 V operating voltage for CMOS M54HCxxx series
- 4.5 V to 5.5 V operating voltage for TTL M54HCTxxx series
- Ceramic hermetic packages
- -55 °C to +125 °C operating temperature range
- Radiation hardness:
- TID : 50 krad(Si)
- SEL immune up to 125 MeV.cm²/mg
EDA Symbols, Footprints and 3D Models
STMicroelectronics - M54HC251
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Symbols
Footprints
3D models
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-16Material Declaration**:
M54HC251K1
Package:
Flat-16EMaterial Declaration**:
M54HC251KG
Package:
Flat-16EMaterial Declaration**:
M54HC251KT
Package:
Flat-16EMaterial Declaration**:
(**) 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 | Marketing Status | Budgetary Price (US$)*/Qty | Order from ST | Order from distributors | Package | Packing Type | RoHS | Country of Origin | ECCN (US) | ECCN (EU) | Operating Temperature (°C) (min) | Operating Temperature (°C) (max) | Package: Product Marking | SMD PIN/Detailed Spec | Quality Level | Lead Finish | |
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| M54HC251DG | | | distributors No availability of distributors reported, please contact our sales office |
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| M54HC251K1 | | | distributors No availability of distributors reported, please contact our sales office |
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| M54HC251KG | | | distributors No availability of distributors reported, please contact our sales office |
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| M54HC251KT | | | distributors No availability of distributors reported, please contact our sales office |
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M54HC251DG Active
M54HC251K1 Active
M54HC251KG Active
M54HC251KT Active
(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors