Datasheet

 2010 - 2015 Microchip Technology Inc. DS00001692C-page 53
USB251xB/xBi
Section 1.1, "Configurable
Features," on page 4
Updated bulleted lists. USB signal drive strength,
USB differential pair pin location and downstream
port power control / over-current detection items
moved from first (strap-configurable) bulleted list to
the second (EEPROM-configurable) bulleted list.
Added enabling of battery charging to the first
bulleted list.
Section 3.1, "Pin
Configurations," on page 7
Clarified introductory sentence.
Table 3-2, “USB251xB/xBi Pin
Descriptions,” on page 12
Updated VBUS_DET buffer type to “I” and changed
description to: “For self-powered applications with a
permanently attached host, this pin must be
connected to a dedicated host control output, or
connected to the 3.3 V domain that powers the
host (typically
VDD33).”
Table 3-2, “USB251xB/xBi Pin
Descriptions,” on page 12
Updated CRFILT and PLLFILT pin descriptions.
Section 7.1,
"Oscillator/Crystal," on
page 44
Removed redundant sentence: “External Clock:
50% duty cycle
 10%, 24/48 MHz  350 ppm, jitter
< 100 ps rms”. This information is provided in
Section 7.2, "External Clock," on page 45.
Section 7.0, "AC
Specifications"
Removed ceramic resonator information.
Section 7.2, "External Clock" Replaced “1.8 V CMOS Logic” with “1.2 V CMOS
Logic”. Updated XTALOUT description.
Section 3.3, "Pin Descriptions
(Grouped by Function)"
Updated CRFILT and PLLFILT pin descriptions.
Cover, Package, All Removed the 49-BGA option.
Order Code Page Changed ordering codes for non-industrial
USB2513B and USB2514B. Last character was
changed from “G” to “C”.
Front page Removed support for ceramic resonator.
Rev. 2.1 (02-22-11) Section 6.2.1,
Package
Thermal Specifications
Added Max Power Supported = (TJ, max.spec. - Tamb)/ ΘJA
Rev. 2.0 (10-01-10) All General refresh, corrected grammatical errors and
unified tone.
TABLE C-1: REVISION HISTORY (CONTINUED)
Revision Level & Date Section/Figure/Entry Correction