Abstract: Circuitry and methods of operating the same to strobe a DQ signal with a gated DQS signal are described. Some aspects are directed to a gating scheme to selectively pass a received strobe signal such as a DQS strobe signal based on a state of a drive enable (DE) signal in a drive circuit in the ATE, such that edges generated by the drive circuit are prevented from mistakenly strobing a received data signal such as a DQ signal.

Abstract: Circuitry and methods of operating the same to strobe a DQ signal with a gated DQS signal are described. Some aspects are directed to a gating scheme to selectively pass a received strobe signal such as a DQS strobe signal based on a state of a drive enable (DE) signal in a drive circuit in the ATE, such that edges generated by the drive circuit are prevented from mistakenly strobing a received data signal such as a DQ signal.

Abstract: In one implementation, a method of testing multiple DUTs using a single tester channel is provided which includes providing an input signal with the single tester channel simultaneously to each of the DUTs. The method further includes providing a clock signal to each of the DUTs. The clock signal provided to each of the DUTs may be successively delayed clock signals, which are provided to successive DUTs. The method includes using the clock signal to cause a next DUTs to provide an output transition before an output of a prior DUT is returned to a pre-transition state. The method further includes detecting with the single tester channel the output transition of each of the DUTs in response to the input signal and the clock signal.

Abstract: In one implementation, a method of testing multiple DUTs using a single tester channel is provided which includes providing an input signal with the single tester channel simultaneously to each of the DUTs. The method further includes providing a clock signal to each of the DUTs. The clock signal provided to each of the DUTs may be successively delayed clock signals, which are provided to successive DUTs. The method includes using the clock signal to cause a next DUTs to provide an output transition before an output of a prior DUT is returned to a pre-transition state. The method further includes detecting with the single tester channel the output transition of each of the DUTs in response to the input signal and the clock signal.

Abstract: A failure analysis memory is disclosed for use with a semiconductor tester for storing bit image failure information relating to a memory-under-test. The semiconductor tester has a plurality of channel cards disposed proximate the memory-under-test. The failure analysis memory includes a memory controller and a plurality of memory units disposed in communication with the memory controller. The memory units are distributed on the channel cards.

Abstract: A hybrid tester architecture for testing a plurality of semiconductor devices in parallel is disclosed. The hybrid tester architecture includes per-pin formatting circuitry having data input circuitry and clock input circuitry and shared timing circuitry coupled to the clock input circuitry. The shared timing circuitry generates programmed timing signals. Per-pin data circuitry couples to the data input circuitry and generates drive data and expected data values associated with each individual device pin. The per-pin formatting circuitry responds to the programmed timing signals to produce tester waveforms in accordance with the per-pin data.

Abstract: A failure analysis memory is disclosed for use with a semiconductor tester for storing bit image failure information relating to a memory-under-test. The semiconductor tester has a plurality of channel cards disposed proximate the memory-under-test. The failure analysis memory includes a memory controller and a plurality of memory units disposed in communication with the memory controller. The memory units are distributed on the channel cards.

Abstract: A hybrid tester architecture for testing a plurality of semiconductor devices in parallel is disclosed. The hybrid tester architecture includes per-pin formatting circuitry having data input circuitry and clock input circuitry and shared timing circuitry coupled to the clock input circuitry. The shared timing circuitry generates programmed timing signals. Per-pin data circuitry couples to the data input circuitry and generates drive data and expected data values associated with each individual device pin. The per-pin formatting circuitry responds to the programmed timing signals to produce tester waveforms in accordance with the per-pin data.