# item.guide
Side-by-Side Comparison USB

USB 1.1 vs. USB-B

Comparing 2 standards across 8 specifications. 8 key differences identified.

Comparing:
USB 1.1
USB-B

USB 1.1, released in September 1998, was the first widely adopted USB standard -- 12 Mbit/s Full Speed for most peripherals, with a 1.5 Mbit/s Low Speed mode for mice and keyboards. The original USB 1.0 from January 1996 saw little real-world adoption before 1.1 quickly superseded it.

View full USB 1.1 spec sheet →

USB-B (Standard-B) is the squarish connector historically used on printers, scanners, and external hard drives -- the peripheral-side counterpart to USB-A. A 9-pin SuperSpeed variant with a distinctive stacked upper tab was added for USB 3.0, though USB-C has since displaced Standard-B in most new peripheral designs.

View full USB-B spec sheet →

Specification Comparison Table

8 Parameters
Parameter / Spec
Released
September 1998
Full Speed
12 Mbit/s
Low Speed
1.5 Mbit/s
Predecessor
USB 1.0 (January 1996, limited real-world adoption)
Pin Count
4 (USB 1.x/2.0) or 9 (USB 3.0+, stacked SuperSpeed tab)
Standard Base Dimensions
~11.1 x 7.0 mm
Reversible
No
Typical Role
Peripheral-side port (printers, scanners, external drives)