Term · Business & Market
Datasheet
The authoritative customer-facing document giving a part's electrical characteristics, absolute maximum ratings, timing, pinout, package drawing and ordering information.
Its parameters are the contractual performance guarantees.
- Also known as
- Data sheet
- Type
- Term
- Domain
- Business & Market, Product lifecycle
Notes
Parameters marked as typical are characterisation data, not guarantees; only min and max limits are production tested.
Overview
A datasheet is the official customer document for a chip or other component, setting out what it does, how it performs and how to use it: electrical characteristics, absolute maximum ratings, timing, pinout, package drawings and ordering information. Its tables of guaranteed values are what the supplier commits to, so customers design to the datasheet, not to typical lab results.
How it works
A datasheet usually opens with a summary of features and applications, followed by a block diagram and pin descriptions. The core is a set of tables. Absolute maximum ratings give the stresses, such as voltage and temperature, beyond which the part may be damaged; they are limits, not operating conditions. Recommended operating conditions give the range within which the part is meant to be used. Electrical characteristics give minimum, typical and maximum values for each parameter under stated conditions, and timing tables and diagrams specify interfaces.
The difference between typical and guaranteed values matters. Minimum and maximum limits are backed by production test or by characterisation and design, and footnotes explain which. Typical values describe what most parts do and are not guaranteed. Graphs show behaviour across temperature, voltage or load, usually for typical parts.
Datasheets also carry the package outline, recommended board layout, thermal data, ordering codes and a revision history. Complex chips split the content across a datasheet, a much longer reference manual for registers and programming, application notes and an errata sheet. Early versions are marked as advance or preliminary information until the part is fully characterised.
Examples
- A voltage regulator datasheet listing output accuracy as a maximum percentage over the full temperature range.
- A microcontroller datasheet paired with a reference manual of several thousand pages describing every register.
- An absolute maximum rating table warning that a supply above a stated voltage may damage the part.
- A preliminary datasheet whose limits change once characterisation of production material is complete.
- A customer rejecting a design because a guaranteed maximum, not the typical value, is outside their margin.
Why it matters
The datasheet is the contract between supplier and customer, so product engineers, applications engineers, technical writers and test engineers must keep it consistent with test limits and characterisation results. Customer design engineers and component engineers rely on it to select and qualify parts.
Related terms
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