USB Mini-B 5-Pin Cable: The Pin Layout, Mapped
Quick answer / TL;DR: Short answer: the Mini-USB-B plug's 5-pin layout carries VBUS (5V power), the D+/D- data pair (USB 2.0 High-Speed), and the ground/shield contacts – power and data in one small beveled plug. A '5-pin Mini-B cable' is the A-to-Mini-B data cable that wires all of it, and the count is what identifies the part.
'USB Mini-B 5 pin' names the cable by its contact count: the Mini-USB-B plug carries a five-position contact set, and the cable behind it wires those five positions from the host to the device. The count is the first spec token buyers check – it separates the Mini-B data plug from the look-alike Mini-A and from the Micro-B of the next generation.
This is the pin-layout guide: the five positions and what each carries, why the count matters when specifying, the look-alikes the count separates it from, and the cable that serves the layout.
The Five Positions, Signal by Signal
| Position | Signal | What it carries |
|---|
| 1 | VBUS | 5V power from the host or charger – the device's charge |
| 2 | D+ | Data plus – the High-Speed signaling pair, with D- |
| 3 | D- | Data minus – the other half of the USB 2.0 pair |
| 4 | Ground | The power return |
| 5 | Shield / ground | The shield contact – the EMI drain to the shell |
The '5-pin' label counts the positions in the plug's contact set; the plug shell adds the chassis ground. Together they are the complete electrical interface of the classic Mini connection: one power line, one data pair, and the return paths.
Why the Count Matters
- Five positions is the Mini-B data plug – the count plus the beveled shape identifies the part
- The Micro-B of the next generation is also a 5-position set – the count alone does not disambiguate, the shape does
- Vendor datasheets state the position count, and the order line uses it as the first token
- A charge-only cable would leave the D+/D- positions unwired – the count is present, the wiring is not; the wiring is the second check
The Look-Alikes the Count Separates
| Connector | Shape | Contact set | Generation |
|---|
| Mini-USB-B | Beveled rectangle | 5 positions | 2000s – cameras, players, old drives |
| Micro-USB-B | Flatter trapezoid | 5 positions | 2010s – phones, small drives |
| Mini-USB-A | Narrow plug | 6 (narrow) / 8 (wide) positions | The rare narrow Mini |
| Full-size USB-B | Square beveled | 4 positions | The printer B |
Two different connectors share the '5-pin mini' search phrase – the Mini-B and the Micro-B. The shape settles it: beveled rectangle is Mini, flatter trapezoid is Micro. They do not cross-fit.
The Cable That Serves the Five Positions
- The other end is the standard USB-A male – the host plug
- VBUS and the D+/D- pair are wired end to end – charge plus data in the one run
- Conductor gauge sized for the 5V current the device draws and the 480 Mbps pair
- Shield and drain carried to the shell, per the standard USB 2.0 cable build
Exact per-pin numbering and per-SKU wiring diagrams are not provided in the knowledge base. The signal set and the contact-count convention are the standard reference; confirm the pinout diagram against the supplier's datasheet for a specific part.
Real-World Applications
The camera cable order
A replacement cable for the service stock: the order line states 'A male to Mini-B male, 5-pin, 1.5 m, data' – the count, the ends, the length, and the wiring check, all from this layout.
The old drive cable
A Mini-USB-era external drive: the five positions take its power and its data from one A port – the same cable, the same layout, the drive's full behavior.
The datasheet cross-check
Verifying a quoted part before the PO: the datasheet's contact set reads five positions with the data pair wired – the match against this layout is the sign-off.
Related reading: The connector side of the pinout? Read the Mini-USB 5-pin connector guide — blogs/news/mini-usb-5-pin
Related reading: 5-pin Mini-B vs the 5-pin Micro-B? Read the two-5-pin comparison — blogs/news/5-pin-mini-b
Frequently Asked Questions
What does '5 pin' mean on a Mini-B cable?
The Mini-USB-B plug's contact set: VBUS power, the D+/D- data pair, and the ground/shield contacts. The five positions carry the complete USB 2.0 interface – power and data together.
Is a 5-pin Mini-B the same as a 5-pin Micro-USB?
No – both are 5-position connectors, but the Mini-B is the beveled rectangle of the 2000s generation and the Micro-B is the flatter trapezoid of the 2010s generation. The shapes do not cross-fit; identify by shape, not count alone.
Does the 5-pin cable carry data as well as charge?
Yes, when the D+/D- pair is wired – which is the standard on a data cable. A charge-only variant leaves the pair unwired and will power the device but never sync. Check the wiring, not just the pin count.
What devices does the 5-pin Mini-B fit?
The classic Mini-USB-B devices: digital cameras, MP3 players, GPS units, car stereos, older 2.5-inch external drives, and the game controllers and adapters of the era.
Looking for a verified, spec-matched USB mini cable, A-to-Mini-B data cable, or adapter solution for your project? Contact our engineering and B2B sales team for datasheets, compatibility test reports, and volume pricing. Request a quote or sample.
