Datasheet

USB251xB/xBi
DS00001692C-page 52  2010 - 2015 Microchip Technology Inc.
APPENDIX C: DATA SHEET REVISION HISTORY
TABLE C-1: REVISION HISTORY
Revision Level & Date Section/Figure/Entry Correction
DS00001692C
(10-20-15)
Product Identification System PIS ordering code information for preferred
package corrected to align with current Microchip
standard practices.
Section 8.0, "Package Marking
Information"
Top marking diagrams corrected to be consistent
with internal specifications and current physical
part markings.
DS00001692B
(08-12-15)
All Added new 36-SQFN package option information
(drawings, ordering codes, top markings, etc.)
Cover, Product Identification
System
Updated document with new ordering section.
Removed previous ordering section from cover.
Section 8.0, "Package Marking
Information"
Added new package marking chapter.
REV A REV A replaces previous SMSC version Rev. 2.4 (11-08-13).
Document is Microchip branded, mention of SMSC is removed.
Order numbers modified adding “G” or “C” as last character to suffix.
The following note added to Package Outline chapter:
“For the most current package drawings, see the Microchip Packaging Specification
at http://www.microchip.com/packaging.”
Rev. 2.4 (11-08-13) Section 5.2.1, "I
2
C Slave
Address"
Corrected slave address to “1010000b”.
Figure 3-1, Figure 3-2,
Figure 3-3, Table 3-1
Corrected pin 36 name (VDDA33).
Section 5.5.1.1, "RESET_N for
Strapping Option
Configuration"
Updated timing diagram and values. Changed t6,
t7, t8 name and added new t9. Updated t5 and 78
values.
Section 5.5.1.2, "RESET_N for
EEPROM Configuration"
Updated timing diagram and values. Changed t7,
t8, and t9 name and added new t10. Updated t5,
t6, and t9 values.
Section 5.5.1.3, "RESET_N for
SMBus Slave Configuration"
Updated timing diagram and values. Changed t7,
t8, and t9 name and added new t10. Updated t5,
t6, and t9 values. Removed t5 “bus” and “self”
distinction.
Note 6-2 Added note regarding 3.3 V supply rise time.
Rev. 2.3 (06-11-13) Table 3-1, “USB251xB/xBi Pin
List (Alphabetical),” on
page 10
Corrected errant description “Server Message
Block” to “System Management Bus”.
Section 7.1,
"Oscillator/Crystal," on
page 44 and FIGURE 7-1:
Typical Crystal Circuit on
page 44
Updated figure to remove external 1 M

requirement. Added note indicating the device
includes and internal1 M
 resistor between the
XTALIN and XTALOUT pins.
FIGURE 3-3: USB2514B Pin
Diagram on page 9
Corrected typo on pin 6.
FIGURE 3-1: USB2512B Pin
Diagram on page 7 & Table 3-
1, “USB251xB/xBi Pin List
(Alphabetical),” on page 10
Added alternate port disable functions to pins 1-4
of the USB2512B.
Rev. 2.2 (02-17-12) Cover Updated clock bullet to remove reference to 48MHz
clock support.