Member of the Texas Instruments

Widebus Family

DOC (Dynamic Output Control) Circuit

Dynamically Changes Output Impedance,

Resulting in Noise Reduction Without

Speed Degradation

Dynamic Drive Capability Is Equivalent to

Standard Outputs With IOH and IOL of

±24 mA at 2.5-V VCC

Overvoltage-Tolerant Inputs/Outputs Allow

Mixed-Voltage-Mode Data Communications

Ioff Supports Partial-Power-Down Mode

Operation

ESD Protection Exceeds JESD 22

– 2000-V Human-Body Model (A114-A)

– 200-V Machine Model (A115-A)

Latch-Up Performance Exceeds 100 mA Per

JESD 78, Class II

description

A Dynamic Output Control (DOC) circuit is implemented, which, during the transition, initially lowers the output

impedance to effectively drive the load and, subsequently, raises the impedance to reduce noise. Figure 1

shows typical VOL vs IOL and VOH vs IOH curves to illustrate the output impedance and drive capability of the

circuit. At the beginning of the signal transition, the DOC circuit provides a maximum dynamic drive that is

equivalent to a high-drive standard-output device. For more information, refer to TI application reports AVC

Logic Family Technology and Applications, literature number SCEA006, and Dynamic Output Control (DOC)

Circuitry Technology and Applications, literature number SCEA009.