AT27LV020A

2

Atmel's innovative design techniques provide fast speeds

that rival 5V parts while keeping the low power consump-

accessed in less than 90 ns. With a typical power dissipa-

AT27LV020A consumes less than one fifth the power of a

standard 5V EPROM. Standby mode supply current is typi-

cally less than 1

µA at 3.3V.

The AT27LV020A is available in industry standard JEDEC

approved one-time programmable (OTP) plastic PLCC,

TSOP and VSOP packages. All devices feature two-line

control (CE, OE) to give designers the flexibility to prevent

bus contention.

TTL level outputs that are compatible with standard TTL

capable of standard 5-volt operation making it ideally suited

for dual supply range systems or card products that are

pluggable in both 3-volt and 5-volt hosts.

Atmel's AT27LV020A has additional features to ensure

gramming Algorithm reduces the time required to program

the part and guarantees reliable programming. Program-

ming time is typically only 100

µs/byte. The Integrated

Product Identification Code electronically identifies the

device and manufacturer. This feature is used by industry

standard programming equipment to select the proper pro-

gramming algorithms and voltages. The AT27LV020A pro-

grams exactly the same way as a standard 5V AT27C020

and uses the same programming equipment.

System Considerations

Switching between active and standby conditions via the

Chip Enable pin may produce transient voltage excursions.

Unless accommodated by the system design, these tran-

sients may exceed data sheet limits, resulting in device

non-conformance. At a minimum, a 0.1

µF high frequency,

low inherent inductance, ceramic capacitor should be uti-

lized for each device. This capacitor should be connected

close to the device as possible. Additionally, to stabilize the

supply voltage level on printed circuit boards with large

EPROM arrays, a 4.7

µF bulk electrolytic capacitor should

terminals. This capacitor should be positioned as close as

possible to the point where the power supply is connected

to the array.