4th Generation USB 2.0 Flash Media Controller with Integrated Card Power FETs

Datasheet

Revision 1.4 (10-08-07)

16

SMSC USB2226

DATASHEET

Notes:

Hot-insertion capable card connectors are required for all flash media. It is required for SD

connector to have Write Protect switch. This allows the chip to detect MMC card.

VDD18 (Pin 106) and VDD18PLL (Pin 101) must have a 10uF +/-20% Low-ESR (equivalent series

resistance) <0.1 ohm bypass capacitor to VSSA. These capacitors must be as close to these pins

as possible.

5.2

Buffer Type Descriptions

NC

1

2

4

5

6

7

8

9

10

11

12

13

14

17

90

91

107

111

113

116

117

118

119

120

121

122

123

124

125

126

127

128

No Connect; pins must be left unconnected.

Table 5.2 USB2226 Buffer Type Descriptions

BUFFER

DESCRIPTION

I

Input

IPU

Input with internal weak pull-up resistor.

IPD

Input with internal weak pull-down resistor.

IS

Input with Schmitt trigger

I/O8

Input/Output buffer with 8mA sink and 8mA source.

I/O8PU

Input/Output buffer with 8mA sink and 8mA source, with an internal weak pull-up resistor.

SYMBOL

128-PIN

VTQFP

BUFFER

TYPE

DESCRIPTION