AT27LV512A-12 View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

AT27LV512A-12

512K (64K x 8) Low Voltage OTP EPROM

Atmel Corporation 

Atmel’s innovative design techniques provide fast speeds

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

tion of a 3.3V supply. At VCC = 3.0V, any byte can be

accessed in less than 70 ns. With a typical power dissipa-

tion of only 18 mW at 5 MHz and VCC = 3.3V, the

AT27LV512A consumes less than one fifth the power of a

standard 5V EPROM.

Standby mode supply current is typically less than 1 µA at

3.3V.

The AT27LV512A is available in industry standard JEDEC-

approved one-time programmable (OTP) plastic PLCC,

SOIC, and TSOP packages. All devices feature two-line

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

bus contention.

The AT27LV512A operating with VCC at 3.0V produces TTL

level outputs that are compatible with standard TTL logic

devices operating at VCC = 5.0V. The device is also capa-

ble of standard 5-volt operation making it ideally suited for

dual supply range systems or card products that are plug-

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

Atmel’s AT27LV512A has additional features to ensure

high quality and efficient production use. The Rapid™ Pro-

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 AT27LV512A pro-

grams exactly the same way as a standard 5V AT27C512R

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

between the VCC and Ground terminals of the device, as

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

be utilized, again connected between the VCC and Ground

terminals. This capacitor should be positioned as close as

possible to the point where the power supply is connected

to the array.

Block Diagram

2

AT27LV512A

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