Intel E3815 FH8065301567411 Data Sheet

Intel

®

 Atom™ Processor E3800 Product Family

182

Datasheet

The minimum and maximum drive characteristics of Intel HD Audio output buffers are 
defined by the V/I curves. 

 describe the SDO buffer AC drive 

specification where as the 

 describe the AC drive specification 

of the HDA_SDI[x] buffers. The AC drive specification for HDA_SYNC, HDA_RST# and 
HDA_CLK buffers is same as that of HDA_SDO.

These curves should be interpreted as traditional ‘DC’ transistor curves with the 
following exceptions: ‘DC drive point’ is the only position on the curves at which steady 
state operation is intended, while the higher currents are only reached momentarily 
during bus switching transients. The ‘AC drive point’ (real definition of buffer strength) 
defines the minimum instantaneous current required to switch the bus.

Adherence to these curves should be evaluated at worst case conditions. Minimum pull 
up curve is evaluated at minimum VCC

HDA

 and high temperature. Minimum pull down 

curve is evaluated at minimum VCC

HDA

 and high temperature. The maximum curve 

test points are evaluated at maximum VCC

HDA

 and low temperature.

Inputs must be clamped to both ground and power rails. The clamp diode 
characteristics are also listed here for reference.

I

OH

switching 

Current High

0 < V

O_HDA

 < 

0.7VCC

HDA

-

16.67VCC

HDA

mA

0.7VCC

HDA

 < V

O_HDA

 

< 0.9VCC

HDA

-

55.57(VCC

HD

A

-Vout)

mA