Semiconductor memory device externally confirmable of a currentl

Details Semiconductor memory device externally confirmable of a currentl Semiconductor memory device externally confirmable of a currentl

1996-07-23

1999-02-23

Nelms, David

Static information storage and retrieval

Read/write circuit

Testing

365193, G11C 700

Patent

active

058751378

ABSTRACT:
A burn-in mode setting circuit in a semiconductor memory device renders a burn-in mode detection signal .phi..sub.BB active upon detection of a burn-in mode being set according to a first combination of external control signals. A voltage-down circuit responds to the burn-in mode detection signal .phi..sub.BB to suppress a voltage-down operation. A burn-in mode state output control circuit renders an operation mode confirmation signal .phi..sub.WCBR active upon detection of an external request of confirmation of an operation mode according to a second combination of external control signals during a burn-in mode. An output buffer circuit responds to a signal .phi..sub.WCBR to provide a signal according to the burn-in mode detection signal .phi..sub.BB to an input/output terminal.

REFERENCES:
patent: 4334295 (1982-06-01), Nagami
patent: 5327387 (1994-07-01), Sugiura et al.
patent: 5347490 (1994-09-01), Terada et al.
patent: 5377154 (1994-12-01), Takasugi
patent: 5434819 (1995-07-01), Matsuo et al.

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