general description

The devices in this series of dual core sense

amplifiers convert bipolar millivolt-level memory

sense signals to saturated logic levels. The design

employs a common reference input which allows

the input threshold voltage level of both amplifiers

to be adjusted. Separate strobe inputs provide time

discrimination for each channel. Logic inputs and

outputs are DTUTTL compatible. All devices of

the series have identical preamplifier configurations,

while various logic connections are provided

to suit the specific application.

The LM5520/LM7520 has output latch capability

and provides sense, strobe, and memory function

for two sense lines. The LM5522/LM7522 contains

a single open collector output which may be

used to expand the number of inputs of the

LM5520/LM7520, or to drive an external Memory

Data Register (MDR). Intended for small memories,

the two channels of the LM5524/LM7524 are

independent with two separate outputs. The

LM5534/LM7534 is similar to the LM55241

LM7524 but has uncommitted, wire-aRable outputs.

The LM5528/LM7528 has the same logic

configuration of the LM5524/LM7524 and in

addition provides separate low impedance Test

Points at each preamplifier output. A similar

device having uncommitted, wire-aRable outputs

is the LM5538/LM7538.

features

High speed

Guaranteed narrow threshold uncertainty over

temperature

Adjustable input threshold voltage

Fast overload recovery times

Two amplifiers per package

Molded or cavity dual-in-line package

Six logic configurations